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Evaluation Board User Guide

UG-136

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com

Evaluating the ADP195 High-Side Power Switch

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. A | Page 1 of 12

FEATURES

Ultrasmall 1 mm × 1 mm, 4-ball, 0.5 mm pitch WLCSP

Small 2 mm × 2 mm, 6-lead, 0.5 mm pitch LFCSP

Low RDS

of 65 mΩ at 1.8 V

Low input voltage range of 1.1 V to 3.6 V

1 amp continuous operating current

Operating temperature range: T

= −40°C to +85°C

GENERAL DESCRIPTION

The ADP195-EVALZ and ACP195CP-EVALZ are used to

demonstrate the functionality of the ADP195 power switch.

Simple device measurements such as VIN to VOUT resistance

(RDS

), ground current, and off state current can be demon-

strated with just a single voltage supply, a voltmeter, a current

meter, and load resistors.

Full details about the ADP195 high side power switches are

available in the ADP195 data sheet, which should be consulted

when using the ADP195-EVALZ or ADP195CP-EVALZ.

EVALUATION BOARDS

08996-001

Figure 1. 4-Ball WLCSP Demonstration Evaluation Board

08996-003

Figure 2. 6-Lead LFCSP Evaluation Board

Summary of content (12 pages)

PAGE 1
Evaluation Board User Guide UG-136 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Evaluating the ADP195 High-Side Power Switch FEATURES GENERAL DESCRIPTION Ultrasmall 1 mm × 1 mm, 4-ball, 0.5 mm pitch WLCSP Small 2 mm × 2 mm, 6-lead, 0.5 mm pitch LFCSP Low RDSON of 65 mΩ at 1.8 V Low input voltage range of 1.1 V to 3.
PAGE 2
UG-136 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Ground Current Measurement ........................................................6 General Description ......................................................................... 1 Ground Current Consumption ...................................................7 Evaluation Boards ....................................................................
PAGE 3
Evaluation Board User Guide UG-136 EVALUATION BOARD SCHEMATIC AND HARDWARE 1 2 VIN VOUT VOUT = 1.8V VIN = 1.8V C1 C2 U1 EN 08996-002 ADP195 J2 GND Figure 3. 4-Ball WLCSP Evaluation Board Schematic VIN = 1.8V 6 VIN1 U1 VOUT1 1 VIN = 1.8V C2 C1 5 VIN2 VOUT2 2 4 EN GND 3 08996-007 J2 Figure 4. 6-Lead LFCSP Evaluation Board Schematic Table 1.
PAGE 4
UG-136 Evaluation Board User Guide VIN TO VOUT RESISTANCE (RDSON) RDSON can be measured using the configurations shown in Figure 7 and Figure 8. RDSON is defined as the input-to-output voltage differential divided by the load current. 0.20 The voltmeter reading divided by the load current value gives the equivalent RDSON value. For more accurate measurements, a second voltmeter can be used to monitor the input voltage across the input capacitor.
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Evaluation Board User Guide UG-136 VOLTAGE SOURCE VOLTMETER 1.99711 – + – + 08996-004 LOAD Figure 7. WLCSP RDSON Measurement VOLTMETER 1.99711 - VOLTAGE SOURCE - + LOAD 08996-009 + Figure 8. LFCSP RDSON Measurement Rev.
PAGE 6
UG-136 Evaluation Board User Guide GROUND CURRENT MEASUREMENT Figure 9 and Figure 10 show how the evaluation boards 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 adequate to handle the power expected to be dissipated across it. An electronic load can be used as an alternative. Ensure that the voltage source used can supply enough current for the expected load levels.
PAGE 7
Evaluation Board User Guide UG-136 20 GROUND CURRENT CONSUMPTION 16 GROUND CURRENT (µA) Ground current measurement is a way of determining how much current the internal circuits of the regulator are consuming while performing the power switch function. To be efficient, the power switch must consume as little current as possible. Figure 11 shows the typical ground current consumption for various load levels. IOUT = 10mA IOUT = 100mA IOUT = 200mA IOUT = 500mA IOUT = 1000mA 12 8 0 1.2 1.6 2.0 2.
PAGE 8
UG-136 Evaluation Board User Guide SHUTDOWN CURRENT MEASUREMENT Figure 13 and Figure 14 show how the evaluation boards can be connected to a voltage source and an ammeter for shutdown current measurements. The ammeter can also be connected to the GND terminal to measure the ground current, which is equal to the shutdown current when EN is tied to ground. Figure 12 shows the typical shutdown current consumption for various input voltages. 5 SHUTDOWN CURRENT (µA) 4 3 VIN = 1.2V VIN = 1.4V VIN = 2.
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Evaluation Board User Guide UG-136 VOLTAGE SOURCE AMMETER + 0.00112 + - 08996-011 - Figure 14. 6-Lead LFCSP Shutdown Current Measurement Rev.
PAGE 10
UG-136 Evaluation Board User Guide ORDERING INFORMATION BILL OF MATERIALS Table 2. Qty 2 1 1 Reference Designator C1, C2 J2 U1 Description Capacitor, MLCC, 0.1 μF, 10 V, 0402, X5R Header, single, STR, two pins IC, power switch Rev. A | Page 10 of 12 Manufacturer/Vendor Murata or equivalent Digi-Key Corp. Analog Devices, Inc. Vendor Part No.
PAGE 11
Evaluation Board User Guide UG-136 NOTES Rev.
PAGE 12
UG-136 Evaluation Board User Guide NOTES ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.