L4931ABDT35TR - STMicroelectronics

August 2008 Rev 17 1/36

L4931ABxx

L4931Cxx

Very low drop voltage regulators with inhibit

Features

■Very low dropout voltage (0.4 V)

■Very low quiescent current

■(Typ. 50 µA in off mode, 600 µA in on mode)

■Output current up to 250 mA

■Logic-controlled electronic shutdown

■Output voltages of 2.7; 3.3; 3.5; 5; 8; 12 V

■Automotive Grade product: 2.7 V, 3.3 V, 3.5 V

VOUT only in SO-8 package

■Internal current and thermal limit

■Only 2.2 µF for stability

■Available in ± 1 % (AB) or 2 % (C) selection at

25 °C

■Supply voltage rejection: 70 dB typ. for 5 V

version

■Temperature range: -40 to 125 °C

Description

The L4931ABxx L4931Cxx are very Low Drop

regulators available in TO-220, SO-8, DPAK,

PPAK and TO-92 packages and in a wide range of

output voltages.

The very low drop voltage (0.4 V) and the very low

quiescent current make them particularly suitable

for low noise, low power applications and

specially in battery powered systems.

A TTL compatible shutdown logic control function

is available in PPAK and SO-8 packages.

This means that when the device is used as a

local regulator, it is possible to put a part of the

board in standby, decreasing the total power

consumption. It requires only a 2.2 µF capacitor

for stability allowing space and cost saving.

The L4931 is available as Automotive Grade in

SO-8 package only, for the options of output

voltages whose commercial Part Numbers are

shown in the Table 19 on page 34 (order codes).

These devices are qualified according to the

specification AEC-Q100 of the Automotive

market, in the temperature range -40 °C to

125 °C, and the statistical tests PAT, SYL, SBL are

performed.

TO-92

DPAK

TO-220

PPAK SO-8

Table 1. Device summary

Part numbers

L4931ABXX27 L4931CXX33 L4931ABXX50 L4931CXX80

L4931CXX27 L4931ABXX35 L4931CXX50 L4931ABXX120

L4931ABXX33 L4931CXX35 L4931ABXX80 L4931CXX120

www.st.com

Contents L4931ABxx - L4931Cxx
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Contents
Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin configuration   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application circuit    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical characteristics   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical application   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Order codes    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Revision history   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

L4931ABxx - L4931Cxx List of figures
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List of figures
Figure 1. Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Test circuit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. Line regulation vs temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 5. Dropout voltage vs temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 6. Supply current vs input voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 7. Supply current vs temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 8. Short circuit current vs dropout voltage  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 9. SVR vs input voltage signal frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

List of tables L4931ABxx - L4931Cxx
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List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Electrical characteristics of L4931ABxx27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics of L4931Cxx27  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 6. Electrical characteristics of L4931Cxx27-TRY (Automotive Grade) . . . . . . . . . . . . . . . . . . 11
Table 7. Electrical characteristics of L4931ABxx33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 8. Electrical characteristics of L4931Cxx33  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 9. Electrical characteristics of L4931Cxx33-TRY (Automotive Grade) . . . . . . . . . . . . . . . . . . 14
Table 10. Electrical characteristics of L4931ABxx35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 11. Electrical characteristics of L4931ABxx35-TRY (Automotive Grade) . . . . . . . . . . . . . . . . . 16
Table 12. Electrical characteristics of L4931Cxx35  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 13. Electrical characteristics of L4931ABxx50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 14. Electrical characteristics of L4931Cxx50  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 15. Electrical characteristics of L4931ABxx80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 16. Electrical characteristics of L4931Cxx80  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 17. Electrical characteristics of L4931ABxx120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 18. Electrical characteristics of L4931Cxx120  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 19. Order codes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 20. Document revision history  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

L4931ABxx - L4931Cxx Diagram

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1 Diagram

Figure 1. Schematic diagram

Pin configuration L4931ABxx - L4931Cxx

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2 Pin configuration

Figure 2. Pin connections (top view)

SO-8

DPAK

TO-220

PPAK

PIN 1 = VOUT

PIN 2 = GND

PIN 3 = VIN

TO-92 BOTTOM VIEW

L4931ABxx - L4931Cxx Maximum ratings

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3 Maximum ratings

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these condition is not implied

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

VIDC Input voltage 20 V

IOOutput current Internally limited mA

PDPower dissipation Internally limited mW

TSTG Storage temperature range -40 to 150 °C

TOP Operating junction temperature range -40 to 125 °C

Table 3. Thermal data

Symbol Parameter TO-220 SO-8 DPAK PPAK TO-92 Unit

RthJC Thermal resistance junction-case 3 20 8 8 °C/W

RthJA Thermal resistance junction-ambient 50 55 100 100 200 °C/W

Application circuit L4931ABxx - L4931Cxx

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4 Application circuit

Figure 3. Test circuit

L4931ABxx - L4931Cxx Electrical characteristics

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5 Electrical characteristics

Table 4. Electrical characteristics of L4931ABxx27 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 4.7 V 2.673 2.7 2.727 V

IO = 5 mA, VI = 4.7 V, TA=-25 to 85°C 2.646 2.754

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 3.4 to 20 V, IO = 0.5 mA 3 15 mV

ΔVOLoad regulation (1)

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

VI = 3.6 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 3.6 to 20 V, IO = 0 mA 0.6 1 mA

VI = 3.6 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 4.6 ± 1 V

f = 120 Hz 74

dBf = 1 kHz 71

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

Electrical characteristics L4931ABxx - L4931Cxx

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Table 5. Electrical characteristics of L4931Cxx27 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 4.7 V 2.646 2.7 2.754 V

IO = 5 mA, VI = 4.7 V, TA=-25 to 85°C 2.592 2.808

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 3.4 to 20 V, IO = 0.5 mA 3 18 mV

ΔVOLoad regulation (1) VI = 3.6 V, IO = 0.5 to 250 mA 3 18 mV

Quiescent current

ON MODE

VI = 3.6 to 20 V, IO = 0 mA 0.6 1 mA

VI = 3.6 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 4.6 ± 1 V

f = 120 Hz 74

dBf = 1 kHz 71

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

L4931ABxx - L4931Cxx Electrical characteristics

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Table 6. Electrical characteristics of L4931Cxx27-TRY (Automotive Grade) (refer to the test

circuits, TA = -40 to 12 5°C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 4.7 V, TA = 25°C 2.646 2.7 2.754 V

IO = 5 mA, VI = 4.7 V 2.592 2.808

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit TA = 25°C 300 mA

ΔVOLine regulation VI = 3.4 to 20 V, IO = 0.5 mA 20 mV

ΔVOLoad regulation VI = 3.6 V, IO = 0.5 to 250 mA 38 mV

Quiescent current

ON MODE

VI = 3.6 to 20 V, IO = 0 mA 1 mA

VI = 3.6 to 20 V, IO = 250 mA 6

OFF MODE VI = 6 V 100 µA

SVR Supply voltage rejection

IO = 5 mA

VI = 4.6 ± 1 V

TA = 25°C

f = 120 Hz 74

dBf = 1 kHz 71

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz, TA = 25°C 50 µV

VdDropout voltage IO = 250 mA, TA = 25°C 0.4 0.6 V

IO = 250 mA 0.82 V

VIL Control input logic low 0.82 V

VIH Control Input Logic High 2 V

IIControl input current VI = 6 V, VC = 6 V, TA = 25°C 10 µA

Output bypass

capacitance

ESR = 0.1 to 10 Ω, IO = 0 to 250 mA,

TA = 25°C 210 µF

Electrical characteristics L4931ABxx - L4931Cxx

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Table 7. Electrical characteristics of L4931ABxx33 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 5.3 V 3.267 3.3 3.333 V

IO = 5 mA, VI = 5.3 V, TA=-25 to 85°C 3.234 3.366

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 4 to 20 V, IO = 0.5 mA 3 15 mV

ΔVOLoad regulation (1) VI = 4.2 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 4.2 to 20 V, IO = 0 mA 0.6 1 mA

VI = 4.2 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 5.2 ± 1 V

f = 120 Hz 73

dBf = 1 kHz 70

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

L4931ABxx - L4931Cxx Electrical characteristics

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Table 8. Electrical characteristics of L4931Cxx33 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 5.3 V 3.234 3.3 3.366 V

IO = 5 mA, VI = 5.3 V, TA=-25 to 85°C 3.168 3.432

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 4.1 to 20 V, IO = 0.5 mA 3 18 mV

ΔVOLoad regulation (1) VI = 4.3 V, IO = 0.5 to 250 mA 3 18 mV

Quiescent current

ON MODE

VI = 4.3 to 20 V, IO = 0 mA 0.6 1 mA

VI = 4.3 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 5.3 ± 1 V

f = 120 Hz 73

dBf = 1 kHz 70

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

Electrical characteristics L4931ABxx - L4931Cxx

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Table 9. Electrical characteristics of L4931Cxx33-TRY (Automotive Grade) (refer to the test

circuits, TA = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 5.3 V, TA = 25°C 3.234 3.3 3.366 V

IO = 5 mA, VI = 5.3 V 3.168 3.432

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit TA = 25°C 300 mA

ΔVOLine regulation VI = 4.1 to 20 V, IO = 0.5 mA 20 mV

ΔVOLoad regulation VI = 4.3 V, IO = 0.5 to 250 mA 38 mV

Quiescent current

ON MODE

VI = 4.3 to 20 V, IO = 0 mA 1 mA

VI = 4.3 to 20 V, IO = 250 mA 6

OFF MODE VI = 6 V 100 µA

SVR Supply voltage rejection

IO = 5 mA

VI = 5.3 ± 1 V

TA = 25°C

f = 120 Hz 73

dBf = 1 kHz 70

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz, TA = 25°C 50 µV

VdDropout voltage IO = 250 mA, TA = 25°C 0.4 0.6 V

IO = 250 mA 0.82 V

VIL Control input logic low 0.82 V

VIH Control Input Logic High 2 V

IIControl input current VI = 6 V, VC = 6 V, TA = 25°C 10 µA

Output bypass

capacitance

ESR = 0.1 to 10 Ω, IO = 0 to 250 mA,

TA = 25°C 210 µF

L4931ABxx - L4931Cxx Electrical characteristics

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Table 10. Electrical characteristics of L4931ABxx35 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 5.5 V 3.465 3.5 3.535 V

IO = 5 mA, VI = 5.5 V, TA=-25 to 85°C 3.43 3.57

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 4.2 to 20 V, IO = 0.5 mA 3 15 mV

ΔVOLoad regulation (1) VI = 4.4 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 4.4 to 20 V, IO = 0 mA 0.6 1 mA

VI = 4.4 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 5.4 ± 1 V

f = 120 Hz 73

dBf = 1 kHz 70

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

Electrical characteristics L4931ABxx - L4931Cxx

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Table 11. Electrical characteristics of L4931ABxx35-TRY (Automotive Grade) (refer to the test

circuits, TA = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 5.5 V, TA = 25°C 3.465 3.5 3.535 V

IO = 5 mA, VI = 5.5 V 3.43 3.57

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit TA = 25°C 300 mA

ΔVOLine regulation VI = 4.2 to 20 V, IO = 0.5 mA 17 mV

ΔVOLoad regulation VI = 4.4 V, IO = 0.5 to 250 mA 35 mV

Quiescent current

ON MODE

VI = 4.4 to 20 V, IO = 0 mA 1 mA

VI = 4.4 to 20 V, IO = 250 mA 6

OFF MODE VI = 6 V 100 µA

SVR Supply voltage rejection

IO = 5 mA

VI = 5.4 ± 1 V

TA = 25°C

f = 120 Hz 73

dBf = 1 kHz 70

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz, TA = 25°C 50 µV

VdDropout voltage IO = 250 mA, TA = 25°C 0.4 0.6 V

IO = 250 mA 0.82 V

VIL Control input logic low 0.82 V

VIH Control Input Logic High 2 V

IIControl input current VI = 6 V, VC = 6 V, TA = 25°C 10 µA

Output bypass

capacitance

ESR = 0.1 to 10 Ω, IO = 0 to 250 mA,

TA = 25°C 210 µF

L4931ABxx - L4931Cxx Electrical characteristics

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Table 12. Electrical characteristics of L4931Cxx35 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 5.5 V 3.43 3.5 3.57 V

IO = 5 mA, VI = 5.5 V, TA=-25 to 85°C 3.36 3.64

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 4.3 to 20 V, IO = 0.5 mA 3 18 mV

ΔVOLoad regulation (1) VI = 4.5 V, IO = 0.5 to 250 mA 3 18 mV

Quiescent current

ON MODE

VI = 4.5 to 20 V, IO = 0 mA 0.6 1 mA

VI = 4.5 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 5.5 ± 1 V

f = 120 Hz 73

dBf = 1 kHz 70

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA= -40 to 125°C 0.8 V

VIH Control Input Logic High TA= -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

Electrical characteristics L4931ABxx - L4931Cxx

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Table 13. Electrical characteristics of L4931ABxx50 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 7 V 4.95 5 5.05 V

IO = 5 mA, VI = 7 V, TA=-25 to 85°C 4.9 5.1

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 5.8 to 20 V, IO = 0.5 mA 3.5 17.5 mV

ΔVOLoad regulation (1) VI = 6 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 6 to 20 V, IO = 0 mA 0.6 1 mA

VI = 6 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 7 ± 1 V

f = 120 Hz 70

dBf = 1 kHz 67

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

L4931ABxx - L4931Cxx Electrical characteristics

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Table 14. Electrical characteristics of L4931Cxx50 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 7 V 4.9 5 5.1 V

IO = 5 mA, VI = 7 V, TA=-25 to 85°C 4.8 5.2

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 5.8 to 20 V, IO = 0.5 mA 3.5 17.5 mV

ΔVOLoad regulation (1) VI = 6 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 6 to 20 V, IO = 0 mA 0.6 1 mA

VI = 6 to 20 V, IO = 250 mA 4 6

OFF MODE VI = 6 V 50 100 µA

SVR Supply voltage rejection IO = 5 mA

VI = 7 ± 1 V

f = 120 Hz 70

dBf = 1 kHz 67

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

Electrical characteristics L4931ABxx - L4931Cxx

20/36

Table 15. Electrical characteristics of L4931ABxx80 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 10 V 7.92 8 8.08 V

IO = 5 mA, VI = 10 V, TA=-25 to 85°C 7.84 8.16

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 8.8 to 20 V, IO = 0.5 mA 4 20 mV

ΔVOLoad regulation (1) VI = 9 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 9 to 20 V, IO = 0 mA 0.8 1.6 mA

VI = 9 to 20 V, IO = 250 mA 4.5 7

OFF MODE VI = 6 V 70 140 µA

SVR Supply voltage rejection IO = 5 mA

VI = 10 ± 1 V

f = 120 Hz 67

dBf = 1 kHz 64

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

L4931ABxx - L4931Cxx Electrical characteristics

21/36

Table 16. Electrical characteristics of L4931Cxx80 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 10 V 7.84 8 8.16 V

IO = 5 mA, VI = 10 V, TA=-25 to 85°C 7.68 8.32

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 8.9 to 20 V, IO = 0.5 mA 4 24 mV

ΔVOLoad regulation (1) VI = 9.1 V, IO = 0.5 to 250 mA 3 18 mV

Quiescent current

ON MODE

VI = 9.1 to 20 V, IO = 0 mA 0.8 1.6 mA

VI = 9.1 to 20 V, IO = 250 mA 4.5 7

OFF MODE VI = 6 V 70 140 µA

SVR Supply voltage rejection IO = 5 mA

VI = 10.1 ± 1 V

f = 120 Hz 67

dBf = 1 kHz 64

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

Electrical characteristics L4931ABxx - L4931Cxx

22/36

Table 17. Electrical characteristics of L4931ABxx120 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 14 V 11.88 12 12.12 V

IO = 5 mA, VI = 14 V, TA=-25 to 85°C 11.76 12.24

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 12.8 to 20 V, IO = 0.5 mA 4 20 mV

ΔVOLoad regulation (1) VI = 13 V, IO = 0.5 to 250 mA 3 15 mV

Quiescent current

ON MODE

VI = 13 to 20 V, IO = 0 mA 0.8 1.6 mA

VI = 13 to 20 V, IO = 250 mA 4.5 7

OFF MODE VI = 6 V 90 180 µA

SVR Supply voltage rejection IO = 5 mA

VI = 14 ± 1 V

f = 120 Hz 64

dBf = 1 kHz 61

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

L4931ABxx - L4931Cxx Electrical characteristics

23/36

Table 18. Electrical characteristics of L4931Cxx120 (refer to the test circuits, TA = 25 °C,

CI = 0.1 µF, CO = 2.2 µF unless otherwise specified).

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage IO = 5 mA, VI = 14 V 11.76 12 12.24 V

IO = 5 mA, VI = 14 V, TA=-25 to 85°C 11.52 12.48

VIOperating input voltage IO = 250 mA 20 V

Iout Output current limit 300 mA

ΔVOLine regulation VI = 12.9 to 20 V, IO = 0.5 mA 4 24 mV

ΔVOLoad regulation (1) VI = 13.1 V, IO = 0.5 to 250 mA 3 18 mV

Quiescent current

ON MODE

VI = 13.1 to 20 V, IO = 0 mA 0.8 1.6 mA

VI = 13.1 to 20 V, IO = 250 mA 4.5 7

OFF MODE VI = 6 V 90 180 µA

SVR Supply voltage rejection IO = 5 mA

VI = 14.1 ± 1 V

f = 120 Hz 64

dBf = 1 kHz 61

f = 10 kHz 55

eN Output noise voltage B = 10 Hz to 100 kHz 50 µV

VdDropout voltage (1) IO = 250 mA 0.4 0.6 V

IO = 250 mA, TA= -40 to 125°C 0.8 V

VIL Control input logic low TA = -40 to 125°C 0.8 V

VIH Control Input Logic High TA = -40 to 125°C 2 V

IIControl input current VI = 6 V, VC = 6 V 10 µA

Output bypass

capacitance ESR = 0.1 to 10 Ω, IO = 0 to 250 mA 2 10 µF

1. For SO-8 package the maximum limit of load regulation and dropout is increased by 20 mV.

Typical application L4931ABxx - L4931Cxx

24/36

6 Typical application

Figure 4. Line regulation vs temperature Figure 5. Dropout voltage vs temperature

Figure 6. Supply current vs input voltage Figure 7. Supply current vs temperature

Figure 8. Short circuit current vs dropout

voltage

Figure 9. SVR vs input voltage signal

frequency

L4931ABxx - L4931Cxx Package mechanical data

25/36

7 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPACK®

packages. These packages have a lead-free second level interconnect. The category of

second Level Interconnect is marked on the package and on the inner box label, in

compliance with JEDEC Standard JESD97. The maximum ratings related to soldering

conditions are also marked on the inner box label. ECOPACK is an ST trademark.

ECOPACK specifications are available at: www.st.com.

Package mechanical data L4931ABxx - L4931Cxx

26/36

Dim. mm. inch.

Min. Typ. Max. Min. Typ. Max.

A 4.40 4.60 0.1730.181

C1.231.32 0.0480.051

D 2.40 2.72 0.094 0.107

D1 1.27 0.050

E0.490.70 0.0190.027

F 0.61 0.88 0.024 0.034

F1 1.14 1.70 0.044 0.067

F2 1.14 1.70 0.044 0.067

G4.95 5.15 0.194 0.203

G1 2.4 2.7 0.094 0.106

H2 10.0 10.40 0.393 0.409

L2 16.4 0.645

L4 13.0 14.0 0.511 0.551

L5 2.65 2.95 0.104 0.116

L6 15.25 15.75 0.600 0.620

L7 6.2 6.6 0.244 0.260

L93.5 3.93 0.137 0.154

DIA. 3.75 3.85 0.147 0.151

TO-220 mechanical data

P011C

L4931ABxx - L4931Cxx Package mechanical data

27/36

Dim.

mm. mils.

Min. Typ. Max. Min. Typ. Max.

A4.324.95 170.1 194.9

b0.36 0.51 14.2 20.1

D 4.45 4.95 175.2 194.9

E3.303.94 129.9155.1

e 2.41 2.67 94.9105.1

e1 1.14 1.40 44.955.1

L 12.7 15.49500.0 609.8

R 2.16 2.41 85.0 94.9

S1 0.92 1.52 36.2 59.8

W 0.41 0.56 16.1 22.0

α5° 5°

TO-92 mechanical data

0102782/D

Package mechanical data L4931ABxx - L4931Cxx

28/36

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A 2.2 2.4 0.086 0.094

A1 0.91.1 0.035 0.043

A2 0.030.230.001 0.009

B 0.4 0.6 0.015 0.023

B2 5.2 5.4 0.204 0.212

C 0.45 0.6 0.017 0.023

C2 0.480.6 0.0190.023

D 6 6.2 0.236 0.244

D1 5.1 0.201

E 6.4 6.6 0.252 0.260

E1 4.7 0.185

e 1.27 0.050

G4.95.25 0.193 0.206

G1 2.38 2.7 0.093 0.106

H9.35 10.1 0.3680.397

L2 0.81 0.0310.039

L4 0.6 1 0.0230.039

L5 1 0.039

L6 2.80.110

PPAK mechanical data

0078180-E

L4931ABxx - L4931Cxx Package mechanical data

29/36

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A 2.2 2.4 0.086 0.094

A1 0.91.1 0.035 0.043

A2 0.030.230.001 0.009

B 0.64 0.90.025 0.035

b4 5.2 5.4 0.204 0.212

C 0.45 0.6 0.017 0.023

C2 0.480.6 0.0190.023

D 6 6.2 0.236 0.244

D1 5.1 0.200

E 6.4 6.6 0.252 0.260

E1 4.7 0.185

e2.280.090

e1 4.4 4.6 0.1730.181

H9.35 10.1 0.3680.397

L 1 0.039

(L1) 2.80.110

L2 0.80.031

L4 0.6 1 0.0230.039

R 0.2 0.008

V2 0° 8°0° 8°

DPAK mechanical data

0068772-F

Package mechanical data L4931ABxx - L4931Cxx

30/36

Dim. mm. inch.

Min. Typ. Max. Min. Typ. Max.

A1.35 1.75 0.0530.069

A1 0.10 0.25 0.04 0.010

A2 1.10 1.65 0.0430.065

B0.33 0.51 0.0130.020

C0.190.25 0.007 0.010

D4.80 5.00 0.189 0.197

E3.80 4.00 0.150 0.157

e 1.27 0.050

H5.80 6.20 0.2280.244

h 0.25 0.50 0.010 0.020

L 0.40 1.27 0.016 0.050

k8° (max.)

ddd 0.1 0.04

SO-8 mechanical data

0016023/C

L4931ABxx - L4931Cxx Package mechanical data

31/36

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A330 12.992

C12.813.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N60 2.362

T22.40.882

Ao 6.806.90 7.00 0.2680.272 0.2.76

Bo 10.40 10.50 10.60 0.4090.4130.417

Ko 2.55 2.65 2.75 0.100 0.104 0.105

Po 3.94.0 4.1 0.1530.157 0.161

P7.98.0 8.1 0.311 0.315 0.319

Tape & reel DPAK-PPAK mechanical data

Package mechanical data L4931ABxx - L4931Cxx

32/36

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A330 12.992

C 12.813.2 0.504 0.519

D 20.2 0.795

N60 2.362

T 22.4 0.882

Ao 8.1 8.5 0.3190.335

Bo 5.5 5.90.216 0.232

Ko 2.1 2.30.082 0.090

Po 3.94.1 0.1530.161

P7.98.1 0.311 0.319

Tape & reel SO-8 mechanical data

L4931ABxx - L4931Cxx Package mechanical data

33/36

Dim. mm. inch.

Min. Typ. Max. Min. Typ. Max.

A1 4.80 0.189

T3.80 0.150

T1 1.60 0.063

T2 2.30 0.091

d0.480.019

P0 12.5 12.90.492 0.508

P2 5.65 7.05 0.222 0.278

F1, F2 2.44 2.54 2.94 0.096 0.100 0.116

delta H ±2 0.079

W 17.5 18.00 19.0 0.689 0.7090.748

W0 5.7 6.30.224 0.248

W1 8.5 9.25 0.335 0.364

W2 0.50 0.20

H18.50 18.70 0.7280.726

H0 15.50 16.50 0.610 0.650

H1 25.00 0.984

D0 3.84.2 0.150 0.165

t0.900.035

L1 30.118

delta P±1 0.039

u50 1.968

Φ1360 14.173

Φ2301.181

Tape & reel for TO-92 mechanical data

F1 F2

delta P

delta H

T2 T1

DRAWING NOT IN SCALE

Order codes L4931ABxx - L4931Cxx

34/36

8 Order codes

Table 19. Order codes

Packages Output

voltage

TO-220 SO-8 PPAK DPAK TO-92

L4931CD27-TR 2.7 V

L4931CD27-TRY(1)

1. Automotive Grade products.

L4931ABPT27TR 2.7 V

L4931CD33-TR L4931CPT33-TR L4931CDT33-TR L4931CZ33-AP 3.3 V

L4931ABV33 L4931ABD33-TR L4931ABDT33-TR 3.3 V

L4931CD33-TRY(1) 3.3 V

L4931CD35-TR L4931CDT35-TR 3.5 V

L4931ABD35-TR L4931ABDT35TR 3.5 V

L4931ABD35-TRY(1) 3.5 V

L4931CD50-TR L4931CPT50-TR L4931CDT50-TR L4931CZ50-AP 5 V

L4931ABD50-TR L4931ABDT50-TR 5 V

L4931CD80-TR L4931CPT80-TR L4931CDT80-TR 8 V

L4931ABPT80TR L4931ABDT80-TR 8 V

L4931CD120-TR L4931CPT120-TR L4931CDT120-TR 12 V

L4931ABD120TR L4931ABPT120R 12 V

L4931ABxx - L4931Cxx Revision history

35/36

9 Revision history

Table 20. Document revision history

Date Revision Changes

21-Jun-2004 11 Document updating.

14-Jun-2006 12 Order codes updated.

31-Jan-2008 13 Added: Ta bl e 1 and new order codes for Automotive grade products.

20-Feb-2008 14 Modified: Table 19 on page 34.

11-Mar-2008 15 Modified: Table 1 on page 1 and Table 19 on page 34.

15-Jul-2008 16 Modified: Table 1 on page 1 and Table 19 on page 34.

18-Aug-2008 17 Modified: Table 19 on page 34.

L4931ABxx - L4931Cxx

36/36

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