Texas Instruments TPS71533EVM User manual

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May 2003 Power Management Products Low Power
User’s Guide
SLVU061A

IMPORTANT NOTICE
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accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
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does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
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Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
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Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
Thisevaluationkit being soldbyTI is intendedforuse for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.
ShouldthisevaluationkitnotmeetthespecificationsindicatedintheEVMUser’sGuide,thekitmaybe returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED,ORSTATUTORY,INCLUDINGANYWARRANTY OF MERCHANTABILITY ORFITNESSFORANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
receivedmaynotberegulatorycompliant oragency certified (FCC,UL, CE,etc.). Dueto theopen construction
oftheproduct,itistheuser’sresponsibilitytotakeanyandallappropriateprecautionswithregardtoelectrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’sGuidepriortohandlingtheproduct.Thisnoticecontainsimportantsafetyinformationabouttemperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

DYNAMIC WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 2.7–24 V and the output
current range of 0 mA to 50 mA.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan
85°C.TheEVM isdesignedto operateproperlywith certaincomponentsabove 85°C aslong
astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited
tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These
typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

v
Read This First
Preface
About This Manual
This user’s guide describes the TPS71533EVM LDO regulator evaluation
module. Each EVM PCB contains a SLVP199 test board with a
TPS71533DCK low dropout linear regulator as well as supporting passive
components. The EVM provides a convenient method of evaluating the
performanceoftheTPS715xxlinearregulator family or otherSC-70/SOT-323
packaged devices with similar pin-outs.
How to Use This Manual
-Chapter 1—Introduction
-Chapter 2—EVM Test Setup
-Chapter 3—Test Results
Related Documentation From Texas Instruments
-TPS71533 data sheet (literature number SLVS338)

vi

Running Title—Attribute Reference
vii
Contents
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 TPS715xx Family of LDO Regulators 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 EVM Design Strategy 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Schematic 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Bill of Materials 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Board Layout 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 EVM Test Setup 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Test Results 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures
1–1 Schematic Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 Top Layer 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3 Bottom Layer 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–4 Assembly Drawing (top) 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 Recommended TPS71533EVM Test Setup 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Input Voltage Ramp vs Output Voltage 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1–1 TPS71533EVM Bill of Materials 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

1-1
Introduction
This user’s guide describes the TPS71533EVM LDO regulator evaluation
module. Each EVM contains a TPS71533 low dropout linear regulator as well
as supporting passive components.
Topic Page
1.1 TPS715xx Family of LDO Regulators 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 EVM Design Strategy 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Schematic 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Bill of Materials 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Board Layout 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

TPS715xx Family of LDO Regulators
1-2 Introduction
1.1 TPS715xx Family of LDO Regulators
TheTPS715xxfamilyofLDOregulatorsiscomprisedofsmallSOT–223/PICO
packaged regulators capable of delivering 50 mA of output current. Features
of the part include:
-50-mA Low-Dropout Regulator
-24-V Maximum Input Voltage
-Low 4.25-µA Quiescent Current at 50 mA
-5-Pin PICO/SC70 (DCK) Package
-Stable With Any Ceramic Capacitor (>0.47 µF)
-Dropout Voltage Typically 100 mV at 50 mA
-Over Current Limitation
-–40°C to 125°C Operating Junction Temperature Range
1.2 EVM Design Strategy
The purpose of this EVM is to facilitate evaluation of the TPS715xx family of
LDO regulators. Each EVM PCB contains a TPS71533 low dropout linear
regulator as well as supporting passive components. Also, the board’s small
size and side clips facilitate attaching it to other PCBs as a power module.
1.3 Schematic
Figure1-1 shows the SLVP199PCB schematic diagram, whichis used as the
PCB for the TPS71533EVM.
Figure 1–1.Schematic Diagram
1
2
3
5
4
NCNC
GND
NC
OUT
IN
TPS71533DCK
J4
J2
R1
Not Used C2 1 µF
J3 VO
J1 VI
C1
0.1 µF
GND
NC

Bill of Materials
1-3
Introduction
1.4 Bill of Materials
Table 1–1 lists materials required for the TPS71533EVM.
Table 1–1.TPS71533EVM Bill of Materials
Qty Ref Des Description Size MFR Part Number
1 C1 Capacitor, ceramic, 0.1 µF, 25 V, X7R, 10% 603 Murata GRM188R71E104KA01
1 C2 Capacitor, ceramic, 1-µF, 6.3 V, X5R, 10% 603 Murata GRM188R60J105KA01
4 J1–J4 Clip, surface-mount, 0.040 board, 0.090
standoff 0.100”NAS Interplex CA26DA-D36W-0FC
0 R1 Not used 603
1 U1 IC, regulator, LDO, micropower SOP-5 (DCK) TI TPS71533DCK
1.5 Board Layout
Figures1–2through1-4showtheboardlayoutfortheSLVP199PCBusedfor
the TPS71533EVM.
Figure 1–2.Top Layer

Board Layout
1-4 Introduction
Figure 1–3.Bottom Layer
Figure 1–4.Assembly Drawing (top)

2-1
EVM Test Setup
EVM Test Setup
This chapter provides recommended test equipment and procedures for per-
forming evaluations using the TPS71533EVM. Figure 2–1 shows the test set-
up.
Figure 2–1.Recommended TPS71533EVM Test Setup
Chapter 2

2-2 EVM Test Setup
The settings for the test equipment shown in Figure 2–1 are described below:
-Functiongeneratorissettoatrianglewavethatrampsfrom0Vto8V,and
a period of 10 ms.
-Power amplifier is set to a gain of 3 dB and a minimum slew rate of 5000
V/µs.
-Power supply capable of ±30-V swing and a 0.5-A current limit to power
the power amplifier.
-A four-channel oscilloscope with channel one’s voltage probe connected
to J1 (IN) and channel two’s voltage probe connected to J3 (OUT). Using
afreechannel,connectacurrentprobearoundtheoutputloadresistance.
Set the scope to trigger off of channel one so that one full triangle is
displayed on the screen.
-A 66-Ωresistance for 50-mA of output current (or 50-mA electronic load)
connected between J3 (OUT) and J2 (GND).
After powering on the amplifier, the input voltage, output voltage, and output
current is displayed.

3-1
Test Results
Test Results
This chapter provides laboratory test results of the TPS71533EVM.
Figure 3–1 shows the input voltage ramp from 0 to just below 24 V (CH1), the
3.3-V regulated output voltage (CH2), and the 50-mA output current (CH4).
The scale on CH4 is 20 mA/div.
Figure 3–1.Input Voltage Ramp vs Output Voltage
Chapter 3

3-2 Test Results

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