Texas Instruments TPS62203EVM-211 User manual

TPS62203EVMĆ211,
TPS62200EVMĆ211
July 2002 PMP Portable Power
User’s Guide
SLVU069

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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and applications, customers should provide adequate design and operating safeguards.
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inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices
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 2002, 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,thekitmaybereturned
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 2002, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 2.5 V to 6 V.
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
125°C. The EVM is designed to operate properly with certain components above 125°C as
long as the input and output ranges are maintained. These components include but are not
limited to linear regulators, switching transistors, pass transistors, and current sense
resistors. These types of devices can be identified using the EVM schematic located in the
EVMUser’sGuide.Whenplacingmeasurementprobesnearthesedevices duringoperation,
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 2002, Texas Instruments Incorporated

How to Use This Manual
iii
Preface
Read This First
About This Manual
This users guide describes the characteristics, operation, and use of the
TPS62200EVM-211 and TPS62203EVM-211 evaluation modules (EVM).
These EVMs contain Texas Instruments high-efficiency buck converters that
are configured to provide a regulated 3.3-V and 1.8-V output voltage and up
to 300 mA of current. The users guide includes a schematic diagram, bill of
materials (BOM), and test data.
How to Use This Manual
This document contains the following chapters:
-Chapter 1 –Introduction
-Chapter 2 –Setup
-Chapter 3 –Board Layout
-Chapter 4 –Bill of Materials and Schematics
Related Documentation From Texas Instruments
SLVS417 –TPS6220x data sheet
If you need Assistance
Contact your local TI sales representative.
FCC Warning
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
testedforcompliancewiththelimitsofcomputingdevicespursuanttosubpart
Jofpart15ofFCCrules,which aredesignedtoprovidereasonableprotection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.

iv

Contents
v
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Background 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Modifications 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Setup 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Input/Output Connect 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 J1—Vin 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2 J2—GND 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.3 J3—Enable 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.4 J4—Vout 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.5 J5—GND 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 EVM Operation 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Board Layout 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Bill of Materials and Schematics 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Bill of Materials 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Schematic 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
vi
Figures
2–1 Connection Diagram 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Top Assembly Layer 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Top Layer Routing 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 Bottom Layer Routing 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–1 TPS62200 Schematic 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–2 TPS62203 Schematic 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1–1 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–1 Bill of Materials 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
This chapter contains background information for the TPS62200EVM–211
and TPS62203EVM–211 evaluation modules.
Topic Page
1.1 Background 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Performance Specification Summary 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Modifications 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Background
1-2
1.1 Background
This TPS6220XEVM uses a TPS6220X buck converter to step down 2.5-V or
higherinputvoltages.ThisEVMoperatesoveraninputvoltagerangeof2.5 V
to 6 V. The goal of the EVM is to demonstrate the small size of the TPS6220X
power supply solution and provide flexibility in interchanging the supporting
passive components.
TheTPS62203EVMusesaTPS62203fixed 3.3-V output buck converter.The
TPS62200EVM uses a TPS62200 adjustable output buck converter and the
appropriate feedback components to provide 1.8-V. Both EVMs include an
enable jumper that allows the user to disable the device.
1.2 Performance Specification Summary
Table 1–1 provides a summary of the TPS6220XEVM performance
specifications.Allspecificationsaregivenforanambienttemperatureof25°C.
Table 1–1.Performance Specification Summary
Specification Test Conditions Min Typ Max Unit
Inp t oltage range
TPS62200EVM 2.5 6
V
Input voltage range TPS62203EVM 3.3 6 V
Output voltage
TPS62200EVM 1.8
V
Output voltage TPS62203EVM 3.3 V
Output current 0 300 mA
1.3 Modifications
Becausetheprimary goaloftheEVMwasto demonstratethesmallsizeofthe
TPS6220X power supply solution, capacitors and inductors with small
footprints were chosen. These capacitors and inductors were carefully
selected to maximize efficiency and minimize ripple. Changing components
could improve or degrade EVM performance.

2-1
Setup and Test Results
Setup and Test Results
This chapter describes how to properly connect, setup, and use the
TPS6220XEVM.
Topic Page
2.1 Input/Output Connections 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 EVM Operation 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Input/Output Connect
2-2
2.1 Input/Output Connect
Figure2–1highlightsthekey connection points of the TPS6220XEVM. These
connection points are described in the following paragraphs.
2.1.1 J1–Vin
Thisisthepositiveconnectiontotheinputpowersupply.Theleadstotheinput
supply should be twisted and kept as short as possible.
2.1.2 J2–GND
This is the return connection to the input power supply.
2.1.3 JP1–Enable
This is the enable pin of the device. The enable pin is pulled up to Vin by an
onboard pullup resistor. Placing a jumper across pins 2–3 of J1 shorts the
enablepintoGND; therebydisablingthedevice.Placinga jumperacrosspins
1–2 of J1 connects the enable pin to Vin and enables the device.
2.1.4 J3–Vout
This is the positive output for the device.
2.1.5 J4–GND
This is the return connection for the load.

EVM Operation
2-3
Setup and Test Results
2.2 EVM Operation
As shown in Figure 2–1, an input power supply and a load must be connected
to the appropriate EVM connectors in order for the EVM to operate. The
absolutemaximuminputvoltageis7V.TheTPS6220X isdesignedtooperate
withamaximuminputvoltageof6V.Shortpins1–2onjumperJ1(labeledON)
toenablethedevice. Connectaloadnottoexceed300mAtotheoutput ofthe
EVM.
Figure 2–1.Connection Diagram
5.0–V, 1A
Power Supply 2
Voltmeter
–+
Load
+
–
300 mA
Oscilloscope
CH2 CH3 CH4CH1

3-1
Board Layout
Board Layout
This chapter provides the TPS6220XEVM board layout and illustrations.
Topic Page
3.1 Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

Layout
3-2
3.1 Layout
Board layout is critical for all switch mode power supplies. Figures 3–1, 3–2,
and 3–3 show the board layout for the SLVP211 PWB. The switching nodes
with high frequency noise are isolated from the noise sensitive feedback cir-
cuitryandcarefulattentionhasbeengiventotheroutingofhighfrequencycur-
rent loops. Refer to the data sheet for specific layout guidelines.
Figure 3–1.Top Assembly Layer
Figure 3–2.Top Layer Routing

Layout
3-3
Board Layout
Figure 3–3.Bottom Layer Routing

4-1
Bill of Materials and Schematics
Bill of Materials and Schematics
This chapter provides the TPS6220XEVM-211 bill of materials and
schematics.
Topic Page
4.1 Bill of Materials 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Schematics 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4

Bill of Materials
4-2
4.1 Bill of Materials
Table 6–1.Bill of Materials
–001 –002 RefDes Description Size MFR Part Number
1 1 C1 Capacitor, ceramic, 4.7 µF, 6.3 V,
X5R, 20% 805 Murata GRM21BR60J475KA11
0 0 C2 Open 805
1 C3 Capacitor, ceramic, 33 pF, 50 V,
C0G, 5% 603 Murata GRM1885C1H330CZ01
0Open 603
1 1 C4 Capacitor, ceramic, 10 µF, 6.3 V,
X5R, 20% 805 TDK C2012X5R0J106M
0 0 C5 Open 1210
1 C6 Capacitor, ceramic, 100 pF, 50 V,
C0G, 5% 603 Murata GRM1885C1H101CZ01
0 Open
4 4 J1, J2,
J3, J4 Header, 2 pin, 100 mil spacing, (36-pin strip) 0.100 x 2”Sullins PTC36SAAN
1 1 JP1 Header, 3 pin, 100 mil spacing,
(36-pin strip) 0.100 x 3”Sullins PTC36SAAN
1 1 L1 Inductor, SMT, 10 µH, 1 A,
128.3 mΩ0.185x0.185 Sumida CDRH4D28–100
1 R1 Resistor, chip, 0 Ω, 1/16 W, 1% 603 Std Std
1Resistor, chip, 475 kΩ, 1/16 W, 1% 603 Std Std
0 R2 Open 603
1Resistor, Chip, 182 kΩ, 1/16 W, 1% 603 Std Std
1 U1 IC, switching buck converter, Adj.–V,
300 mA SOT23–5 Texas Instruments TPS62200DBV
1IC, switching buck converter, 3.3 V,
300 mA SOT23–5 Texas Instruments TPS62203DBV
1 1 —PCB, 1.5 In x 1 In x .062 In Any SLVP211
1 1 —Shunt, 100 mil, black 0.100 3M 929950–00

Schematics
4-3
Bill of Materials and Schematics
4.2 Schematics
Figure 4–1.TPS62200 Schematic
1VIN
4
FB
5
SW
3EN
2GND
J1
J2
J3
Vin
GND
1
2
1
2
1
2
1
2
J4
C1
4.7 µF
1
1
C2
JP1
EN
1User Defined
R1
475 kΩ
R2
182 kΩ
C3
33 pF
C6
100 pF
C4
10 µFC5
Vout = 1.8 V
GND
U1
TPS62200DBV L1
10 µH
Figure 4–2.TPS62203 Schematic
1VIN
4
FB
5
SW
3EN
2GND
J1
J2
J3
Vin
GND
1
2
1
2
1
2
1
2
J4
C1
4.7 µF
1
1
C2
JP1
EN
1User Defined
R1
0
R2
C3
C6
C4
10 µFC5
Vout = 3.3 V
GND
U1
TPS62203DBV L1
10 µH
2
2Open
2
2

4-4