Evaluation Board User Guide
UG-054
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Setting Up the Evaluation Board for the ADP150
Please see the last page for an important warning and disclaimers. Rev. 0 | Page 1
08518-001
of 8
FEATURES
Input voltage range: 2.2 V to 5.5 V
Output current range: 0 mA to 150 mA
Output voltage accuracy: ±1%
Operating temperature range: −40°C to +125°C
GENERAL DESCRIPTION
The ADP150 evaluation board is used to demonstrate
the functionality of the ADP150 linear regulator.
Simple device measurements such as line and load regulation,
dropout voltage, and ground current can be demonstrated with
only a single voltage supply, a voltage meter, a current meter,
and load resistors.
For more information about the ADP150 linear regulator, see
the ADP150 data sheet.
EVALUATION BOARDS
Figure 1. TSOT PCB Layout
08518-002
Figure 2. WLCSP PCB Layout
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TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Evaluation Boards ............................................................................. 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Evaluation Board Configurations .............................................. 3
Output Voltage Measurements ....................................................... 4
Line Regulation Measurements .................................................. 5
Load Regulation Measurements ..................................................5
Dropout Voltage Measurements ..................................................5
Ground Current Measurements ......................................................6
Ground Current Consumption ...................................................7
Ordering Information .......................................................................8
Bill of Materials ..............................................................................8
ESD Caution...................................................................................8
REVISION HISTORY
1/10—Revision 0: Initial Version
Evaluation Board User Guide UG-054
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EVALUATION BOARD HARDWARE
EVALUATION BOARD CONFIGURATIONS
The ADP150 evaluation board is supplied with different com-
ponents, depending on the version that is ordered. Components
common to both versions are C2, C4, and J1. Figure 3 and Figure 4
show the schematics of these evaluation board configurations.
Table 1 describes the components.
1
2
3
5
4
08518-003
C3 C4
C1C2 J1
V
OUT
V
IN
VOUTVIN
GND
NC
EN
U1
Figure 3. Evaluation Board Schematic, TSOT
J1
C1
C2 C3 C4
V
IN
004
V
OUT
VIN VOUT
U1
08518-
EN GND
Figure 4. Evaluation Board Schematic, WLCSP
Table 1. Evaluation Board Hardware Components
Component Description
U11
ADP150 low dropout linear regulator
C12
Input bypass capacitor, 1 μF, 0402 size (not
populated)
C2 Input bypass capacitor, 1 μF, 0603 size
C32
Output capacitor, 1 μF, 0402 size (not populated)
C4 Output capacitor, 1 μF, 0603 size
J1 Jumper (connects EN to VIN for automatic
startup)
1 The evaluation board with the WLCSP package is the ADP150CB-3.3-EVALZ.
The evaluation board with the TSOT package is the ADP150UJ-3.3-EVALZ.
2 C1 and C3 are not populated. The ADP150 evaluation board requires only
one input bypass capacitor and one output capacitor for stable operation.
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OUTPUT VOLTAGE MEASUREMENTS
VOLTMETER
VOLTAGE S OURCE
LOAD
08518-005
Figure 5. Output Voltage Measurement Setup, TSOT
VOLTAGE SOURCE VOLTMETER
LOAD
08518-006
Figure 6. Output Voltage Measurement Setup, WLCSP
Figure 5 and Figure 6 show how the evaluation board can be
connected to a voltage source and a voltage meter for basic out-
put voltage accuracy measurements. A resistor can be used as
the load for the regulator. Ensure that the resistor has a power
rating that is adequate to handle the power that is expected to
be dissipated across it. An electronic load can also be used as
an alternative. Ensure that the voltage source can supply enough
current for the expected load levels.
Follow these steps to connect to a voltage source and voltage meter:
1. Connect the negative terminal (−) of the voltage source to
one of the GND pads on the evaluation board.
2. Connect the positive terminal (+) of the voltage source to
the VIN pad of the evaluation board.
3. Connect a load between the VOUT pad and one of the
GND pads.
4. Connect the negative terminal (−) of the voltage meter to
one of the GND pads.
5. Connect the positive terminal (+) of the voltage meter to
the VOUT pad.
When these steps are completed, the voltage source can be
turned on. If J1 is inserted (connecting EN to VIN for auto-
matic startup), the regulator powers up.
If the load current is large, the user must connect the voltage
meter as close as possible to the output capacitor to reduce the
effects of IR drops.
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3.2883.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
VIN (V)
08518-007
LINE REGULATION MEASUREMENTS
For line regulation measurements, the output of the regulator
is monitored while its input is varied. For good line regulation,
the output must change as little as possible with varying input
levels. To ensure that the device is not in dropout mode during
this measurement, VIN must be varied between VOUTNOM + 0.4 V
(or 2.2 V, whichever is greater) and VINMAX.
For example, for an ADP150 with a fixed 3.3 V output, VIN
must be varied between 3.7 V and 5.5 V. This measurement
can be repeated under different load conditions. Figure 7
shows the typical line regulation performance of an ADP150
with a fixed 3.3 V output.
3.300
3.290
3.292
3.294
3.296
3.298
VOUT (V)
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 150mA
IOUT = 50mA
IOUT = 100mA
Figure 7. Output Voltage (VOUT) vs. Input Voltage (VIN) at TA = 25°C
LOAD REGULATION MEASUREMENTS
For load regulation measurements, the output of the regulator
is monitored while the load is varied. For good load regulation,
the output must change as little as possible with varying load.
The input voltage must be held constant during this measure-
ment. The load current can be varied from 0 mA to 150 mA.
Figure 8 shows the typical load regulation performance of an
ADP150 with a fixed 3.3 V output for an input voltage of 3.7 V.
3.298
3.291
3.292
3.293
3.294
3.295
3.296
3.297
V
OUT
(V)
3.290
0.01 10001001010.1 I
OUT
(mA)
08518-013
Figure 8. Output Voltage (VOUT) vs. Load Current (IOUT) at VIN = 3.7 V,
VOUT = 3.3 V, TA = 25°C
DROPOUT VOLTAGE MEASUREMENTS
Dropout voltage can be measured using the configurations
shown in Figure 5 and Figure 6. Dropout voltage is defined as
the input-to-output voltage differential when the input voltage
is set to the nominal output voltage. This applies only to output
voltages above 2.2 V. Dropout voltage increases with larger loads.
For more accurate measurements, a second voltage meter can
be used to monitor the input voltage across the input capacitor.
The input supply voltage may need to be adjusted to account
for IR drops, especially if large load currents are used. Figure 9
shows the typical curve of dropout voltage measurements with
different load currents.
80
70
60
50
40
30
20
10
01 10 100 1000
DROPOUT VOLTAGE ( mV)
I
OUT
(mA)
08518-009
Figure 9. Dropout Voltage vs. Load Current (IOUT) at VOUT = 3.3 V, TA = 25°C
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GROUND CURRENT MEASUREMENTS
08518-010
VOLT AGE SOURCE
LOAD
AMMETER
Figure 10. Ground Current Measurement Setup, TSOT
VOLT AGE SOURCE
AMMETER
08518-011
LOAD
Figure 11. Ground Current Measurement Setup, WLCSP
Figure 10 and Figure 11 show how the evaluation board can
be connected to a voltage source and an ammeter for ground
current measurements. A resistor can be used as the load for
the regulator. Ensure that the resistor has a power rating that is
adequate to handle the power that is expected to be dissipated
across it. An electronic load can be used as an alternative. Ensure
that the voltage source can supply enough current for the
expected load levels.
Follow these steps to connect to a voltage source and ammeter:
1. Connect the positive terminal (+) of the voltage source to
the VIN pad of the evaluation board.
2. Connect the positive terminal (+) of the ammeter to one
of the GND pads on the evaluation board.
3. Connect the negative terminal (−) of the ammeter to the
negative (−) terminal of the voltage source.
4. Connect a load between the VOUT pad of the evaluation
board and the negative (−) terminal of the voltage source.
Evaluation Board User Guide UG-054
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When these steps are completed, the voltage source can be
turned on. If J1 is inserted (connecting EN to VIN for auto-
matic startup), the regulator powers up.
GROUND CURRENT CONSUMPTION
Ground current measurements can determine how much current
the internal circuits of the regulator consume while the circuits
perform the regulation function. To be efficient, the regulator
must consume as little current as possible. Typically, the regulator
uses the maximum current when supplying its largest load level
(150 mA). Figure 12 shows the typical ground current consump-
tion for various load levels at VOUT = 3.3 V and TA = 25°C.
When the device is disabled (EN = GND), ground current
drops to less than 1 μA.
250
200
150
100
50
GRO UND CURRENT (µA)
0
3.5 5.55.35.14.94.74.54.34.13.93.7 V
IN
(V)
08518-012
I
OUT
= 0. 1m A
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Figure 12. Ground Current vs. Input Voltage (VIN) at VOUT = 3.3 V, TA = 25°C
UG-054 Evaluation Board User Guide
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Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied “as is” and without warranties of any kind, express,
implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under
any patents or other intellectual property by application or use of evaluation boards. Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the
right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not
authorized to be used in life support devices or systems.
©2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG08518-0-1/10(0)
ORDERING INFORMATION
BILL OF MATERIALS
Table 2.
Reference Designator Description Manufacturer Part No.
C2, C4 Capacitor, MLCC, 1 μF, 16 V, 0603, X5R Murata (or equivalent) GRM188R61C105KA93
J1 Jumper, single, STR, two pins Sullins Connector Solutions PEC02SAAN
U1 IC, LDO regulator Analog Devices, Inc. ADP150ACBZ-3.3-R7 (WLCSP)
ADP150AUJZ-3.3-R7 (TSOT)
ESD CAUTION
