ICL7663SIBA-T - Intersil Corporation

FN3180.5

ICL7663S

CMOS Programmable Micropower

Positive Voltage Regulator

The ICL7663S Super Programmable Micropower Voltage

Regulator is a low power, high efficiency positive voltage

regulator which accepts 1.6V to 16V inputs and provides

adjustable outputs from 1.3V to 16V at currents up to 40mA.

It is a direct replacement for the industry standard ICL7663B

offering wider operating voltage and temperature ranges,

improved output accuracy (ICL7663SA), better temperature

coefficient, guaranteed maximum supply current, and

guaranteed line and load regulation. All improvements are

highlighted in the electrical characteristics section. Critical

parameters are guaranteed over the entire commercial

and industrial temperature ranges. The ICL7663S/SA

programmable output voltage is set by two external

resistors. The 1% reference accuracy of the ICL7663SA

eliminates the need for trimming the output voltage in most

applications.

The ICL7663S is well suited for battery powered supplies,

featuring 4µA quiescent current, low VIN to VOUT differential,

output current sensing and logic input level shutdown

control. In addition, the ICL7663S has a negative

temperature coefficient output suitable for generating a

temperature compensated display drive voltage for LCD

displays.

Pinout

ICL7663S

(PDIP, SOIC)

TOP VIEW

Features

•Guaranteed 10µA Maximum Quiescent Current Over All

Temperature Ranges

•Wider Operating Voltage Range - 1.6V to 16V

•Guaranteed Line and Load Regulation Over Entire

Operating Temperature Range Optional

• 1% Output Voltage Accuracy (ICL7663SA)

• Output Voltage Programmable from 1.3V to 16V

•Improved Temperature Coefficient of Output Voltage

• 40mA Minimum Output Current with Current Limiting

• Output Voltages with Programmable Negative

Temperature Coefficients

• Output Shutdown via Current-Limit Sensing or External

Logic Level

• Low Input-to-Output Voltage Differential

• Improved Direct Replacement for Industry Standard

ICL7663B and Other Second-Source Products

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Low-Power Portable Instrumentation

• Pagers

• Handheld Instruments

• LCD Display Modules

• Remote Data Loggers

• Battery-Powered Systems

SENSE

VOUT2

VOUT1

GND

VIN+

VTC

VSET

SHDN

Data Sheet July 21, 2005

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 |Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

2FN3180.5

July 21, 2005

Ordering Information

PART NUMBER

TEMP. RANGE

(°C) PACKAGE

PKG. DWG.

ICL7663SCBA* 0 to 70 8 Ld SOIC (N) M8.15

ICL7663SCBAZA*

(See Note)

0 to 70 8 Ld SOIC (N)

(Pb-free)

M8.15

ICL7663SCPA 0 to 70 8 Ld PDIP E8.3

ICL7663SCPAZ

(See Note)

0 to 70 8 Ld PDIP**

(Pb-free)

E8.3

ICL7663SACBA* 0 to 70 8 Ld SOIC (N) M8.15

ICL7663SACBAZA*

(See Note)

0 to 70 8 Ld SOIC (N)

(Pb-free)

M8.15

ICL7663SACPA 0 to 70 8 Ld PDIP E8.3

ICL7663SAIBA -25 to 85 8 Ld SOIC (N) M8.15

ICL7663SAIBAZA

(See Note)

-25 to 85 8 Ld SOIC (N)

(Pb-free)

M8.15

*Add “-T” suffix to part number for tape and reel packaging.

**Pb-free PDIPs can be used for through hole wave solder

processing only. They are not intended for use in Reflow solder

processing applications.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are RoHS compliant and

compatible with both SnPb and Pb-free soldering operations. Intersil

Pb-free products are MSL classified at Pb-free peak reflow

temperatures that meet or exceed the Pb-free requirements of

IPC/JEDEC J STD-020.

ICL7663S

3FN3180.5

July 21, 2005

Absolute Maximum Ratings Thermal Information

Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+18V

Any Input or Output Voltage (Note 1)

Terminals 1, 2, 3, 5, 6, 7 . . . . . . . . . . . . . VIN+ 0.3V to GND -0.3V

Output Source Current

Terminal 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA

Terminal 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA

Output Sinking Current

Terminal 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA

Operating Conditions

Temperature Range

ICL7663SC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C

ICL7663SI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-25°C to 85°C

Thermal Resistance (Typical, Note 2) θJA (°C/W) θJC (°C/W)

CERDIP Package. . . . . . . . . . . . . . . . . 115 30

PDIP Package* . . . . . . . . . . . . . . . . . . 150 N/A

Plastic SOIC Package . . . . . . . . . . . . . 180 N/A

Maximum Junction Temperature

PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C

CERDIP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175°C

Maximum Storage Temperature Range . . . . . . . . . .-65°C to 150°C

Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . . 300°C

(SOIC - Lead Tips Only)

*Pb-free PDIPs can be used for through hole wave solder processing

only. They are not intended for use in Reflow solder processing

applications.

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

1. Connecting any terminal to voltages greater than (V+IN + 0.3V) or less than (GND - 0.3V) may cause destructive device latch-up. It is

recommended that no inputs from sources operating on external power supplies be applied prior to ICL7663S power-up.

2. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications Specifications Below Applicable to Both ICL7663S and ICL7663SA, Unless Otherwise Specified. V+IN = 9V,

VOUT = 5V, TA = 25°C, Unless Otherwise Specified. Notes 4, 5. See Test Circuit, Figure 7

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

Input Voltage V+IN ICL7663S TA = 25°C 1.5 - 16 V

0°C < TA < 70°C 1.6 - 16 V

-25°C < TA < 85°C 1.6 - 16 V

ICL7663SA 0°C < TA < 70°C 1.6 - 16 V

-25°C < TA < 85°C 1.6 - 16 V

Quiescent Current IQ1.4V ≤ VOUT ≤ 8.5V, No Load

V+IN = 9V 0°C < TA < 70°C - - 10 µA

-25°C < TA < 85°C - - 10 µA

V+IN = 16V 0°C < TA < 70°C - - 12 µA

-25°C < TA < 85°C - - 12 µA

Reference Voltage VSET IOUT1 = 100µA, VOUT = VSET

ICL7663S TA = 25°C 1.2 1.3 1.4 V

ICL7663SA TA = 25°C 1.275 1.29 1.305 V

Temperature

Coefficient

∆VSET

∆T

0°C < TA < 70°C - 100 - ppm

-25°C < TA < 85°C - 100 - ppm

Line Regulation ∆VSET

VSET’ ∆VIN

2V < VIN < 15V 0°C < TA < 70°C - 0.03 - %/V

-25°C < TA < 85°C - 0.03 0.3 %/V

VSET Input Current ISET 0°C < TA < 70°C - 0.01 10 nA

-25°C < TA < 85°C - 0.01 10 nA

Shutdown Input Current ISHDN -±0.01 10 nA

Shutdown Input Voltage VSHDN VSHDN HI: Both VOUT Disabled 1.4 - - V

VSHDN LO: Both VOUT Enable - - 0.3 V

Sense Pin Input Current ISENSE -0.0110nA

ICL7663S

4FN3180.5

July 21, 2005

Functional Diagram

Sense Pin Input Threshold VCL -0.5- V

Input-Output Saturation

Resistance (Note 3)

RSAT V+IN = 2V, IOUT1 = 1mA - 170 350 Ω

V+IN = 9V, IOUT1 = 2mA - 50 100 Ω

V+IN = 15V, IOUT1 = 5mA - 35 70 Ω

Load Regulation ∆VOUT

∆IOUT

1mA < IOUT2 < 20mA - 1 3 Ω

50µA < IOUT1 < 5mA - 2 10 Ω

Available Output Current

(VOUT2)

IOUT2 3V ≤ VIN ≤ 16V, VIN - VOUT2 = 1.5V 40 - - mA

Negative Tempco Output

(Note 4)

VTC Open Circuit Voltage - 0.9 - V

ITC Maximum Sink Current 0 8 2.0 mA

Temperature Coefficient ∆VTC

∆T

Open Circuit - +2.5 - mV/°C

Minimum Load Current IL(MIN) Includes VSET Divider TA = 25°C - - 1.0 µA

0°C < TA < 70°C - 0.2 5.0 µA

-25°C < TA < 85°C - 0.2 5.0 µA

NOTES:

3. This parameter refers to the saturation resistance of the MOS pass transistor. The minimum input-output voltage differential at low current (under

5mA), can be determined by multiplying the load current (including set resistor current, but not quiescent current) by this resistance.

4. This output has a positive temperature coefficient. Using it in combination with the inverting input of the regulator at VSET

, a negative

coefficient results in the output voltage. See Figure 9 for details. Pin will not source current.

5. All pins are designed to withstand electrostatic discharge (ESD) levels in excess of 2000V.

6. All significant improvements over the industry standard ICL7663 are highlighted.

Electrical Specifications Specifications Below Applicable to Both ICL7663S and ICL7663SA, Unless Otherwise Specified. V+IN = 9V,

VOUT = 5V, TA = 25°C, Unless Otherwise Specified. Notes 4, 5. See Test Circuit, Figure 7 (Continued)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

REF B

VOUT1

VOUT2

SENSE

VSET

VTC

SHUTDOWN

GND

V+IN 8

GND

ICL7663S

5FN3180.5

July 21, 2005

Typical Performance Curves

FIGURE 1. VOUT2 OUTPUT VOLTAGE AS A FUNCTION OF

OUTPUT CURRENT

FIGURE 2. VOUT1 INPUT-OUTPUT DIFFERENTIAL vs

OUTPUT CURRENT

FIGURE 3. VOUT2 INPUT-OUTPUT DIFFERENTIAL vs

OUTPUT CURRENT

FIGURE 4. NPUT POWER SUPPLY REJECTION RATIO

FIGURE 5. QUIESCENT CURRENT AS A FUNCTION OF

INPUT VOLTAGE

FIGURE 6. QUIESCENT CURRENT AS A FUNCTION OF

TEMPERATURE

5.000

4.995

4.990

4.985

4.980

4.975

4.970

4.965

4.960

4.955

4.950

VOUT (V)

10-2 10-1 100101102

10-3

IOUT (mA)

TA = 25°C

V+ = 9.0V

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

02468101214161820

TA = 25°C

V+IN = 15V

V+IN - VOUT1 (V)

IOUT1 (mA)

V+IN = 9V

V+IN = 2V

IOUT2 (mA)

V+IN - VOUT1 (V)

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

00 5 10 15 20 25 30 35 40 45 50

V+IN = 9V

TA = 25°C

V+IN = 2V

V+IN = 15V

10-2 10-1 1001011021k

100

PSRR (dB)

FREQUENCY (Hz)

VIN = 9.0V

∆VIN = 2V

TA = -20°C

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

00 2 4 6 8 10 12 14 16

V+IN (V)

IO (µA)

TA = -25°C

TA = -70°C

5.00

4.75

4.50

4.25

4.00

3.75

3.50

3.25

3.00

2.75

2.50

IO (µA)

V+ = 15V

V+ = 9V

V+ = 2V

-20 0 20 40 60 80

TEMPERATURE (°C)

ICL7663S

6FN3180.5

July 21, 2005

Detailed Description

The ICL7663S is a CMOS integrated circuit incorporating all

the functions of a voltage regulator plus protection circuitry

on a single monolithic chip. Referring to the Functional

Diagram, the main blocks are a bandgap-type voltage

reference, an error amplifier, and an output driver with both

PMOS and NPN pass transistors.

The bandgap output voltage, trimmed to 1.29V ±15mV for

the ICL7663SA, and the input voltage at the VSET terminal

are compared in amplifier A. Error amplifier A drives a

P-channel pass transistor which is sufficient for low (under

about 5mA) currents. The high current output is passed by

an NPN bipolar transistor connected as a follower. This

configuration gives more gain and lower output impedance.

Logic-controlled shutdown is implemented via a N-Channel

MOS transistor. Current-sensing is achieved with

comparator C, which functions with the VOUT2 terminal. The

ICL7663S has an output (VTC) from a buffer amplifier (B),

which can be used in combination with amplifier A to

generate programmable-temperature-coefficient output

voltages.

The amplifier, reference and comparator circuitry all operate

at bias levels well below 1µA to achieve extremely low

quiescent current. This does limit the dynamic response of

the circuits, however, and transients are best dealt with

outside the regulator loop.

Basic Operation

The ICL7663S is designed to regulate battery voltages in the

5V to 15V region at maximum load currents of about 5mA to

30mA. Although intended as low power devices, power

dissipation limits must be observed. For example, the power

dissipation in the case of a 10V supply regulated down to 2V

with a load current of 30mA clearly exceeds the power

dissipation rating of the Mini-DIP:

(10 - 2) (30) (10-3) = 240mW

The circuit of Figure 8 illustrates proper use of the device.

CMOS devices generally require two precautions: every

input pin must go somewhere, and maximum values of

applied voltages and current limits must be rigorously

observed. Neglecting these precautions may lead to, at the

least, incorrect or nonoperation, and at worst, destructive

device failure. To avoid the problem of latchup, do not apply

inputs to any pins before supply voltage is applied.

Input Voltages - The ICL7663S accepts working inputs of

1.5V to 16V. When power is applied, the rate-of-rise of the

input may be hundreds of volts per microsecond. This is

potentially harmful to the regulators, where internal

operating currents are in the nanoampere range. The

0.047µF capacitor on the device side of the switch will limit

inputs to a safe level around 2V/µs. Use of this capacitor is

suggested in all applications. In severe rate-of-rise cases, it

may be advisable to use an RC network on the SHutDowN

pin to delay output turn-on. Battery charging surges,

transients, and assorted noise signals should be kept from

the regulators by RC filtering, zener protection, or even

fusing.

Output Voltages - The resistor divider R2/R1 is used to

scale the reference voltage, VSET, to the desired output

using the formula VOUT = (1 + R2/R1) VSET

. Suitable

arrangements of these resistors, using a potentiometer,

enables exact values for VOUT to be obtained. In most

applications the potentiometer may be eliminated by using

the ICL7663SA. The ICL7663SA has VSET voltage

guaranteed to be 1.29V ±15mV and when used with ±1%

tolerance resistors for R1 and R2 the initial output voltage

will be within ±2.7% of ideal.

The low leakage current of the VSET terminal allows R1 and

R2 to be tens of megohms for minimum additional quiescent

drain current. However, some load current is required for

proper operation, so for extremely low-drain applications it is

necessary to draw at least 1µA. This can include the current

for R2 and R1.

Output voltages up to nearly the VIN supply may be obtained

at low load currents, while the low limit is the reference

voltage. The minimum input-output differential in each

regulator is obtained using the VOUT1, terminal. The input-

output differential increases to 1.5V when using VOUT2.

Output Currents - Low output currents of less than 5mA are

obtained with the least input-output differential from the

VOUT1 terminal (connect VOUT2 to VOUT1). Where higher

currents are needed, use VOUT2 (VOUT1, should be left

open in this case).

SHDN

VOUT2

VOUT1

VTC

VSET

SENSE

GND

1µA MIN

S2S1

RCL

RLCL

(7663 ONLY)

VOUT

OFF

1MΩ

1.4V < VSHDN < V+IN

0.047µF

NOTES:

7. S1 when closed disables output current limiting.

8. Close S2 for VOUT1, open S2 for VOUT2.

9. IQ quiescent currents measured at GND pin by meter M.

10. S3 when ON, permits normal operation, when OFF, shuts down

both VOUT1 and VOUT2.

FIGURE 7. ICL7663S TEST CIRCUIT

ICL7663S

7FN3180.5

July 21, 2005

High output currents can be obtained only as far as package

dissipation allows. It is strongly recommended that output

current-limit sensing be used in such cases.

Current-Limit Sensing - The on-chip comparator (C in the

Functional Diagram) permits shutdown of the regulator

output in the event of excessive current drain. As Figure 8

shows, a current-limiting resistor, RCL, is placed in series

with VOUT2 and the SENSE terminal is connected to the

load side of RCL. When the current through RCL is high

enough to produce a voltage drop equal to VCL (0.5V) the

voltage feedback is by-passed and the regulator output will

be limited to this current. Therefore, when the maximum load

current (ILOAD) is determined, simply divide VCL by ILOAD to

obtain the value for RCL.

Logic-Controllable Shutdown - When equipment is not

needed continuously (e.g., in remote data-acquisition

systems), it is desirable to eliminate its drain on the system

until it is required. This usually means switches, with their

unreliable contacts. Instead, the ICL7663S can be shut

down by a logic signal, leaving only IQ (under 4µA) as a

drain on the power source. Since this pin must not be left

open, it should be tied to ground if not needed. A voltage of

less than 0.3V for the ICL7663S will keep the regulator ON,

and a voltage level of more than 1.4V but less than V+IN will

turn the outputs OFF. If there is a possibility that the control

signal could exceed the regulator input (V+IN) the current

from this signal should be limited to 100µA maximum by a

high value (1MΩ) series resistor. This situation may occur

when the logic signal originates from a system powered

separately from that of the regulator.

Additional Circuit Precautions - This regulator has poor

rejection of voltage fluctuations from AC sources above

10Hz or so. To prevent the output from responding (where

this might be a problem), a reservoir capacitor across the

load is advised. The value of this capacitor is chosen so that

the regulated output voltage reaches 90% of its final value in

20ms. From:

In addition, where such a capacitor is used, a current-limiting

resistor is also suggested (see “Current-Limit Sensing”).

Producing Output Voltages with Negative Temperature

Coefficients -The ICL7663S has an additional output which

is 0.9V relative to GND and has a tempco of +2.5mV/°C. By

applying this voltage to the inverting input of amplifier A (i.e.,

the VSET pin), output voltages having negative TC may be

produced. The TC of the output voltage is controlled by the

R2/R3 ratio (see Figure 9 and its design equations).

Applications

Boosting Output Current with External Transistor

The maximum available output current from the ICL7663S is

40mA. To obtain output currents greater than 40mA, an

external NPN transistor is used connected as shown in

Figure 10.

SHDN

VOUT2

VOUT1

VTC

VSET

SENSE

GND

VIN 0.047µF

V+IN

604kΩ

RCL

20Ω

210kΩR1

10µFVOUT

+5V

FIGURE 8. POSITIVE REGULATOR WITH CURRENT LIMIT

OUT = R2 + R1

R1VSET = 5V

ICL = VCL

RCL = 25mA

I = ∆V

C ,C

∆t=

IOUT

(20 x 10-3)

0.9VOUT = 0.022 IOUT

VOUT

VREF

VSET

+VTC -

R1R2

VOUT

here:VSET = 1.3V

TC = 0.9V

CVTC = +2.5mV/°C

FIGURE 9. GENERATING NEGATIVE TEMPERATURE

COEFFICIENTS

EQ. 1: VOUT = VSET

(R2

1 + R1

)R2

+ R3(VSET - VTC)

EQ. 2: TC VOUT = R2

-R3(TC VTC) in mV/°C

SHDN

VOUT2

VOUT1

VSET

SENSE

GND

VIN 10µF

V+IN

604kΩ

100Ω

210kΩ

VOUT

+5V

0.47Ω

EXTERNAL PIN

POWER

TRANSISTOR

FIGURE 10. BOOSTING OUTPUT CURRENT WITH EXTERNAL

TRANSISTOR

ICL7663S

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see www.intersil.com

FN3180.5

July 21, 2005

Generating a Temperature Compensated Display Drive Voltage

Temperature has an important effect in the variation of

threshold voltage in multiplexed LCD displays. As

temperature rises, the threshold voltage goes down. For

applications where the display temperature varies widely, a

temperature compensated display voltage, VDISP, can be

generated using the ICL7663S. This is shown in Figure 11

for the ICM7233 triplexed LCD display driver.

VOUT2

VOUT1

VSET

GND

V+IN

VTC

VDISP

ICM7233

ICL7663S

GND

DATA BUS

V+

+5V

1.8MΩ

300kΩ

2.7MΩ

LOGIC

SYSTEM,

PROCESSOR,

ETC.

GND

FIGURE 11. GENERATING A MULTIPLEXED LCD DISPLAY DRIVE VOLTAGE

ICL7663S