Texas Instruments TPS62730 User Manual

TPS62730 Stepdown Converter With Bypass Mode for
This user's guide describes the TPS62730 evaluation module (EVM), how to perform a stand-alone
evaluation or interface with a host or system. The converter is designed to deliver up to 100 mA of
continuous current to the output. The converter can be switched into bypass mode by grounding the
ON/BYP pin or automatically with the input voltage falling to the output regulation voltage.
1 Introduction
2 Considerations With Evaluating the TPS62730
3 Performance Specification Summary
4 Test Summary
4.1 Equipment
4.2 Equipment and EVM Setup
4.3 Test Procedure Using a Single Cell Li-Ion Battery
5 Schematic, Physical Layouts and Bill of Materials
5.1 Schematic
5.2 Physical Layouts
5.3 Bill of Materials
6 Oscilloscope Traces
1 EVM Schematic and Evaluation Setup
2 TPS62730 EVM Board Schematic
3 Assembly Layer
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4 Top Layer
5 Bottom Layer
6 CH1: Phase; CH2: Output Ripple, Vin = 3.3 V, and 21-Ω Load
7 PFM Mode at Low Load, 40 mA - CH1: Phase; CH2: Output Ripple; 0.2 µs/div
8 PFM Mode at Low Load, 11 mA - CH1: Phase; CH2: Output Ripple; 1 µs/div
Transition From Switching Converter to Bypass Mode by Removing Input Power - CH1: Phase Node;
9
CH2: STAT Pin
10 Transition From Converter Switch Mode to Bypass Mode by Pulling ON/BYP Pin Low
11 Transition From Bypass Mode to Converter Switch Mode by Pulling ON/BYP Pin High
12 Startup by Hot-Plugging the Input Power Source
13 Transient Output Load Step From 50 mA to 100 mA
14 Transient Output Load Step From 100 mA to 50 mA
SLVU455 - April 2011
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Ultralow-Power Wireless Applications
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TPS62730 Stepdown Converter With Bypass Mode for Ultralow-Power Wireless
Copyright © 2011, Texas Instruments Incorporated
Contents
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User's Guide
SLVU455 - April 2011
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