AD ADP150AUJZ-3.3-R7 Setting up the evaluation board for the adp150 Datasheet

Evaluation Board User Guide
UG-054
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Setting Up the Evaluation Board for the ADP150
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.
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
For more information about the ADP150 linear regulator, see
the ADP150 data sheet.
GENERAL DESCRIPTION
The ADP150 evaluation board is used to demonstrate
the functionality of the ADP150 linear regulator.
08518-002
08518-001
EVALUATION BOARDS
Figure 1. TSOT PCB Layout
Please see the last page for an important warning and disclaimers.
Figure 2. WLCSP PCB Layout
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Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
Load Regulation Measurements ..................................................5
General Description ......................................................................... 1
Dropout Voltage Measurements..................................................5
Evaluation Boards ............................................................................. 1
Ground Current Measurements ......................................................6
Revision History ............................................................................... 2
Ground Current Consumption ...................................................7
Evaluation Board Hardware ............................................................ 3
Ordering Information .......................................................................8
Evaluation Board Configurations .............................................. 3
Bill of Materials ..............................................................................8
Output Voltage Measurements ....................................................... 4
ESD Caution...................................................................................8
Line Regulation Measurements .................................................. 5
REVISION HISTORY
1/10—Revision 0: Initial Version
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EVALUATION BOARD HARDWARE
EVALUATION BOARD CONFIGURATIONS
Table 1. Evaluation Board Hardware Components
The ADP150 evaluation board is supplied with different components, 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.
Component
U1 1
C1 2
VOUT
VIN
VIN
2
GND
3
EN
C1
VOUT 5
C3
U1
J1
C4
08518-003
C2
1
NC 4
Figure 3. Evaluation Board Schematic, TSOT
VIN
C2
C32
C4
J1
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.
VOUT
VIN
C1
VOUT
C3
J1
C4
U1
EN
GND
08518-004
C2
Description
ADP150 low dropout linear regulator
Input bypass capacitor, 1 μF, 0402 size (not
populated)
Input bypass capacitor, 1 μF, 0603 size
Output capacitor, 1 μF, 0402 size (not populated)
Output capacitor, 1 μF, 0603 size
Jumper (connects EN to VIN for automatic
startup)
Figure 4. Evaluation Board Schematic, WLCSP
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Evaluation Board User Guide
OUTPUT VOLTAGE MEASUREMENTS
VOLTMETER
VOLTAGE SOURCE
08518-005
LOAD
Figure 5. Output Voltage Measurement Setup, TSOT
VOLTAGE SOURCE
VOLTMETER
08518-006
LOAD
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 output 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.
2.
Connect the negative terminal (−) of the voltage source to
one of the GND pads on the evaluation board.
Connect the positive terminal (+) of the voltage source to
the VIN pad of the evaluation board.
3.
4.
5.
Connect a load between the VOUT pad and one of the
GND pads.
Connect the negative terminal (−) of the voltage meter to
one of the GND pads.
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 automatic 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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Evaluation Board User Guide
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LINE REGULATION MEASUREMENTS
DROPOUT VOLTAGE 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.
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 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.
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.
3.300
80
IOUT = 0.1mA
3.298
70
DROPOUT VOLTAGE (mV)
IOUT = 1mA
3.296
VOUT (V)
IOUT = 10mA
3.294
3.292
IOUT = 50mA
3.290
IOUT = 100mA
60
50
40
30
20
IOUT = 150mA
3.7
3.9
4.1
4.3
4.5
4.7
4.9
5.1
5.3
5.5
VIN (V)
0
08518-007
3.288
3.5
1
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 measurement. 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
3.297
3.296
VOUT (V)
3.295
3.294
3.293
3.292
10
100
1000
IOUT (mA)
08518-013
3.291
1
1000
Figure 9. Dropout Voltage vs. Load Current (IOUT) at VOUT = 3.3 V, TA = 25°C
LOAD REGULATION MEASUREMENTS
0.1
100
IOUT (mA)
Figure 7. Output Voltage (VOUT) vs. Input Voltage (VIN) at TA = 25°C
3.290
0.01
10
08518-009
10
Figure 8. Output Voltage (VOUT) vs. Load Current (IOUT) at VIN = 3.7 V,
VOUT = 3.3 V, TA = 25°C
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Evaluation Board User Guide
GROUND CURRENT MEASUREMENTS
AMMETER
VOLTAGE SOURCE
08518-010
LOAD
Figure 10. Ground Current Measurement Setup, TSOT
VOLTAGE SOURCE
08518-011
AMMETER
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.
2.
3.
4.
Rev. 0 | Page 6 of 8
Connect the positive terminal (+) of the voltage source to
the VIN pad of the evaluation board.
Connect the positive terminal (+) of the ammeter to one
of the GND pads on the evaluation board.
Connect the negative terminal (−) of the ammeter to the
negative (−) terminal of the voltage source.
Connect a load between the VOUT pad of the evaluation
board and the negative (−) terminal of the voltage source.
Evaluation Board User Guide
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250
When these steps are completed, the voltage source can be
turned on. If J1 is inserted (connecting EN to VIN for automatic startup), the regulator powers up.
IOUT = 150mA
GROUND CURRENT (µA)
200
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 consumption for various load levels at VOUT = 3.3 V and TA = 25°C.
IOUT = 100mA
150
IOUT = 50mA
100
IOUT = 10mA
50
IOUT = 1mA
3.7
3.9
4.1
4.3
4.5
4.7
VIN (V)
4.9
5.1
5.3
5.5
08518-012
IOUT = 0.1mA
0
3.5
When the device is disabled (EN = GND), ground current
drops to less than 1 μA.
Figure 12. Ground Current vs. Input Voltage (VIN) at VOUT = 3.3 V, TA = 25°C
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Evaluation Board User Guide
ORDERING INFORMATION
BILL OF MATERIALS
Table 2.
Reference Designator
C2, C4
J1
U1
Description
Capacitor, MLCC, 1 μF, 16 V, 0603, X5R
Jumper, single, STR, two pins
IC, LDO regulator
Manufacturer
Murata (or equivalent)
Sullins Connector Solutions
Analog Devices, Inc.
Part No.
GRM188R61C105KA93
PEC02SAAN
ADP150ACBZ-3.3-R7 (WLCSP)
ADP150AUJZ-3.3-R7 (TSOT)
ESD CAUTION
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.
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