Texas Instruments specifications Introduction, Features, TPS62065/67 Applications

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Introduction

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1Introduction

The TPS62065-67EVM-347 is a fully assembled and tested pair of PCBs for evaluating the TPS62065 and TPS62067 2-A step-down converters. The EVM comes configured with both a TPS62065 IC and a TPS62067 IC; there are two PCBs, one for each respective step-down converter IC.

1.1Features

Input voltage range: 3.0 V to 6.0 V

Adjustable output voltage: 0.8 V to VIN

Up to 2.0-A output current

3-MHz switching frequency

Power Good output (TPS62067EVM only)

Clock dithering

1.2TPS62065/67 Applications

The TPS62065 and TPS62067 step-down converters are ideal for these applications:

POL

Digital cameras

PDAs, pocket PCs

Portable media players

DSP supply

2Electrical Performance Specifications

Table 1 summarizes the TPS62065/67EVM performance specifications.

Table 1. TPS62065/67EVM Performance Characteristics

 

 

Notes and

 

 

 

 

Parameter

Symbol

Conditions

Min

Typ

Max

Units

 

 

 

 

 

 

 

Input Characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Voltage

VIN

 

3.0

 

6.0

V

 

 

 

 

 

 

 

Input Undervoltage Lockout

VIN_UVLO

Falling

1.73

1.78

1.83

V

(UVLO)

Rising

1.9

1.95

1.98

V

Output Characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

Line Regulation

 

 

 

0

 

%/V

 

 

 

 

 

 

 

Load Regulation

 

 

 

–0.5

 

%/A

 

 

 

 

 

 

 

Output Current 1

IOUT1

VIN = 3.0 V to 6.0 V

 

 

2000

mA

Forward Current Limit

 

 

 

 

 

 

High-Side and Low Side

ILIMF

VIN = 3.0 V to 6.0 V

2300

2750

3300

mA

MOSFET

 

 

 

 

 

 

 

 

 

 

 

 

 

Systems Characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

Switching Frequency

fSW

 

2600

3000

3400

kHz

Peak Efficiency

hpk

VIN =Nom

 

 

95

%

 

h

VIN = 5.0 V, VIN =

 

 

 

 

Full Load Efficiency

1.8 V IOUT = 2,000

 

82

 

%

 

 

mA

 

 

 

 

 

 

 

 

 

 

 

2

TPS62065/67EVM

SLVU364 –March 2010

 

 

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Contents TPS62065/67EVM TPS62065/67EVM Performance Characteristics FeaturesElectrical Performance Specifications IntroductionTPS62056/67EVM Schematic TPS62065EVM SchematicConnector and Test Point Descriptions Enable Jumpers/Switches TPS62065EVMEnable Jumpers/Switches TPS62067EVM 8 JP20 EN Test ConfigurationHardware Setup 9 J27 Vout SMATesting Procedure Start-up TPS62065 TPS62065/67EVM Test DataEfficiency TPS62065StartupStart-up and Shutdown TPS62067 TPS62067StartupOutput Voltage Ripple Power-Save Mode TPS62065 Output Voltage Ripple PFM ModeControl Loop Bode Diagrams TPS62065 TPS62065 Gain and Phase vs FrequencyTPS62065/67EVM-347 Assembly Drawings and Layout TPS62065/67EVM Component Placement Top View TPS62065/67EVM Top-Side Copper Top View TPS62065/67EVM Internal Layer 2 X-Ray View, from Top TPS62065/67EVM Internal Layer 1 X-Ray View, from Top TPS62065/67EVM Bottom-Side Copper Bottom View Bill of Materials TPS62065/67EVM Bill of Materials1 2 3EVM Warnings and Restrictions Evaluation Board/Kit Important NoticeFCC Warning Important Notice