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TPS53851 Datasheet(PDF) 3 Page - Texas Instruments

Part No. TPS53851
Description  DUAL OR 2-PHASE, STACKABLE CONTROLLER
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS53851 Datasheet(HTML) 3 Page - Texas Instruments

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TPS53851
www.ti.com
SLUS985 – DECEMBER 2009
1
INTRODUCTION
......................................... 1
5.14
OUTPUT OVERVOLTAGE PROTECTION
........ 20
1.1
FEATURES
.......................................... 1
5.15
CLKFLT, CLKIO PIN FAULT
....................... 20
1.2
APPLICATIONS
...................................... 1
5.16
PHSEL PIN FAULT
................................. 21
1.3
DESCRIPTION
....................................... 1
5.17
OVERTEMPERATURE
............................. 21
1.4
ORDERING INFORMATION
......................... 2
5.18
FAULT MASKING OPERATION
................... 21
2
DEVICE RATINGS
....................................... 4
5.19
PROTECTION AND FAULT MODES
.............. 21
2.1
ABSOLUTE MAXIMUM RATINGS
.................. 4
5.20
SETTING THE SWITCHING FREQUENCY
........ 22
2.2
RECOMMENDED OPERATING CONDITIONS
..... 4
5.21
SYNCHRONIZING A SINGLE CONTROLLER TO
2.3
ELECTROSTATIC DISCHARGE (ESD)
AN EXTERNAL CLOCK
............................ 22
PROTECTION
....................................... 4
5.22
SPLIT INPUT VOLTAGE OPERATION
............ 23
2.4
PACKAGE DISSIPATION RATINGS
................ 4
5.23
CURRENT SENSE
................................. 24
2.5
ELECTRICAL CHARACTERISTICS
................. 5
5.24
CURRENT SENSING AND BALANCING
.......... 25
3
TYPICAL CHARACTERISTICS
........................ 8
5.25
OVERCURRENT DETECTION AND HICCUP
4
DEVICE INFORMATION
............................... 12
MODE
.............................................. 25
5.26
CALCULATING OVERCURRENT PROTECTION
4.1
TERMINAL CONFIGURATION
..................... 12
LEVEL
.............................................. 26
4.2
CLOCK MASTER AND CLOCK SLAVE
........... 12
5.27
CONFIGURING SINGLE AND MULTIPLE
4.3
VOLTAGE MASTER AND VOLTAGE SLAVE
..... 13
DEVICES
........................................... 28
4.4
FUNCTIONAL BLOCK DIAGRAM
.................. 15
5.28
DIGITAL CLOCK SYNCHRONIZATION
........... 39
5
APPLICATION INFORMATION
...................... 16
5.29
DESIGN EXAMPLES INFORMATION
............. 41
5.1
FUNCTIONAL DESCRIPTION
..................... 16
6
DESIGN EXAMPLES
.................................. 43
6.1
Example 1: Dual-Output Configuration from 12 V to
5.2
DATA SHEET ORGANIZATION
.................... 16
3.3 V and 1.5 V DC-to-DC Converter Using a
5.3
TYPICAL START UP SEQUENCE
................. 16
TPS53851
.......................................... 43
5.4
TRACK (SOFT-START WITHOUT PRE-BIASED
6.2
Example 2: Two-Phase Single Output Configuration
From 12 V to 1.5 V DC/DC Converter Using a
OUTPUT)
........................................... 17
TPS53851
.......................................... 50
5.5
SOFT-START WITH PRE-BIASED OUTPUTS
.... 17
6.3
Example 3: Four-Phase Single Output Configuration
5.6
TRACK FUNCTION IN CONFIGURING A SLAVE
From 12 V to 1.8 V DC-to-DC Converter Using Two
CHANNEL
.......................................... 19
TPS53851
.......................................... 54
5.7
DIFFERENTIAL AMPLIFER, U9
................... 19
6.4
ABBREVIATIONS
.................................. 59
6.5
LAYOUT CONSIDERATIONS
...................... 60
5.8
POWER GOOD
..................................... 19
7
ADDITIONAL REFERENCES
......................... 61
5.9
SETTING THE OUTPUT VOLTAGE
............... 19
5.10
PROGRAMMABLE INPUT UNDERVOLTAGE
7.1
Related Parts
....................................... 61
LOCK OUT PROTECTION
......................... 20
7.2
References
......................................... 61
5.11
POWER ON RESET (POR)
........................ 20
7.3
Package Outline
.................................... 61
5.12
OVERCURRENT
................................... 20
7.4
Recommended PCB Footprint
...................... 61
5.13
OUTPUT UNDERVOLTAGE PROTECTION
....... 20
Copyright © 2009, Texas Instruments Incorporated
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