SH3100 Datasheet, PDF (2/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Table of Contents
Description .................................................................................................................. .................................................................. 1
Features ...................................................................................................................... .................................................................. 1
Absolute Maximum Ratings ..................................................................................... .................................................................. 4
Current Consumption ................................................................................................ ................................................................ 4,5
Pin Configuration ....................................................................................................... .................................................................. 6
Ordering Information ................................................................................................. .................................................................. 6
Pin Descriptions ......................................................................................................... .............................................................. 6, 7
Block Diagram ........................................................................................................... .................................................................. 8
Power Supply and Battery Backup .......................................................................... .................................................................. 9
VBAK Protection ........................................................................................................ ................................................................. 10
Operating Modes ........................................................................................................ ........................................................... 11, 12
Application Diagrams: Modes 1 to 3 ...................................................................... ................................................................. 13
Application Diagrams: Modes 4 to 6 ...................................................................... ................................................................. 14
Application Diagrams: Modes 7 to 9 ...................................................................... ................................................................. 15
Non-Volatile Fuse Memory Registers ....................................................................... ........................................................... 16, 17
SH3100 Default Settings .......................................................................................... .................................................................. 18
Register Memory Map ............................................................................................... ................................................................. 19
Register Organization ................................................................................................ ................................................................. 19
Register Initialization from Fuses .............................................................................. ................................................................. 19
Multi-Word Registers ................................................................................................. ................................................................. 19
System Management ................................................................................................. .................................................................. 20
Register Descriptions ................................................................................................ ............................................................ 21-47
Applications Information ........................................................................................... ................................................................. 48
Initial Power-Up .......................................................................................................... ................................................................. 48
Standard Operation, VDD settles at greater than programmed VBO ..................... ................................................................. 48
Standard Operation, VDD settles at less than programmed VBO .......................... ................................................................. 49
Automatic Fan Speed Control Enabled ..................................................................... .................................................................. 49
Switching Regulator Modes Enabled ........................................................................ .................................................................. 50
Pad Specifications ..................................................................................................... .................................................................. 51
Standard Digital Input: CLKIN .................................................................................. .................................................................. 51
Tri-State / Analog Input: SNSE ................................................................................. .................................................................. 51
Dual Supply Digital Output: CLK0 & CLK1 ............................................................... .................................................................. 52
Asymmetric Drive Digital Output: NRST .................................................................... .................................................................. 52
Dual Drive Digital Bidirectional: INT .......................................................................... .................................................................. 53
I²C Communication: SCL & SDA ................................................................................ ................................................................. 54
Multi-Function Output: PWM ..................................................................................... .................................................................. 54
© 2006 Semtech Corp.
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