TPS40400 Datasheet, PDF (1/56 Pages) Texas Instruments – 3.0-V TO 20-V PMBus SYNCHRONOUS BUCK CONTROLLER

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TPS40400
SLUS930A – APRIL 2011 – REVISED JULY 2011
3.0-V TO 20-V PMBus SYNCHRONOUS BUCK CONTROLLER
Check for Samples: TPS40400
FEATURES
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• Input Operating Voltage Range: 3 V to 20 V
• PMBus Enabled Analog Controller
• Reference 600 mV ± 1%
• Remote Voltage Sense Amplifier
• Internal 6-V Regulator and 6-V Gate Drive
• Programmable Overcurrent Protection
• Inductor Resistance or Series Resistance
Used for Current Sensing
• Programmable Switching Frequency: 200 kHz
to 2 MHz
• Powergood Indicator
• Thermal Shutdown
• Programmable Soft-Start
• Internal Bootstrap Diode
• Pre-bias Output Safe
• 24-Pin QFN Package
APPLICATIONS
• Smart Power Systems
• Power Supply Modules
• Communications Equipment
• Computing Equipment
DESCRIPTION
The TPS40400 is a cost-optimized flexible
synchronous buck controller that operates from a
nominal 3 V to 20 V supply. This controller is an
analog PWM controller that allows programming and
monitoring via the PMBus interface. Flexible features
found on this device include programmable soft-start
time, programmable short circuit limit and
programmable undervoltage lockout (UVLO).
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SMBALRT
DATA
V_IN
CLK
1 CLK
DATA 24
CNTL
2 CNTL
SMBALRT 23
PGOOD
3 PGOOD
ADDR1 22
SYNC
4 SYNC
ADDR0 21
TRACK
5 TRACK
VDD 20
6 COMP
7 FB
TPS40400
HDRV 19
BOOT 18
8 DIFFO
SW 17
9 VSNS+
10 VSNS–
11 ISNS–
ISNS+
12
SGND
25
LDRV 16
GND 15
BP6 14
BP3
13
V_OUT+
V_OUT–
SNS+
SNS–
UDG-09073
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated