LP3907-Q1 Datasheet, PDF (2/53 Pages) Texas Instruments – Dual High-Current Step-Down DC-DC And Dual Linear Regulator

LP3907-Q1
SNVSA55A – DECEMBER 2014 – REVISED MAY 2015
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Tables................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6
7.2 ESD Ratings.............................................................. 6
7.3 Recommended Operating Conditions (Bucks).......... 6
7.4 Thermal Information .................................................. 7
7.5 General Electrical Characteristics............................ 7
7.6 Low Dropout Regulators, LDO1 And LDO2............. 7
7.7 Buck Converters SW1, SW2.................................... 8
7.8 I/O Electrical Characteristics.................................... 9
7.9 Power-On Reset Threshold/Function (POR) ........... 9
7.10 I²C Interface Timing Requirements ....................... 9
7.11 Typical Characteristics — LDO............................... 9
7.12 Typical Characteristics — Bucks .......................... 11
7.13 Typical Characteristics — Buck1 .......................... 12
7.14 Typical Characteristics — Buck2 .......................... 12
7.15 Typical Characteristics — Bucks .......................... 13
8 Detailed Description ............................................ 15
8.1 Overview ................................................................. 15
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 25
8.5 Programming .......................................................... 25
8.6 Register Maps ........................................................ 28
9 Application and Implementation ........................ 38
9.1 Application Information............................................ 38
9.2 Typical Application ................................................. 38
10 Power Supply Recommendations ..................... 43
10.1 Analog Power Signal Routing ............................... 43
11 Layout................................................................... 44
11.1 DSBGA Layout Guidelines.................................... 44
11.2 Layout Example .................................................... 45
11.3 Thermal Considerations of WQFN Package......... 45
12 Device and Documentation Support ................. 46
12.1 Documentation Support ........................................ 46
12.2 Trademarks ........................................................... 46
12.3 Electrostatic Discharge Caution ............................ 46
12.4 Glossary ................................................................ 46
13 Mechanical, Packaging, and Orderable
Information ........................................................... 46
4 Revision History
Changes from Original (December 2014) to Revision A
Page
• Added last sentence to "NOTE" .......................................................................................................................................... 19
2
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