TPS53211 Datasheet, PDF (1/21 Pages) Texas Instruments – Single-Phase PWM Controller with Light-Load Efficiency Optimization

TPS53211
www.ti.com
SLUSAA9 – SEPTEMBER 2011
Single-Phase PWM Controller with Light-Load Efficiency Optimization
FEATURES
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• 1.5-V to 19-V Conversion Voltage Range
• 4.5-V to 14-V Supply Voltage Range
• Voltage Mode Control
• Skip Mode at Light Load for Efficiency
Optimization
• High Precision 0.5% Internal 0.8-V Reference
• Adjustable Output Voltage from 0.8 V to
0.7×V_IN
• Internal Soft-Start
• Supports Pre-biased Startup
• Supports Soft-Stop
• Programmable Switching Frequency from
250 kHz to 1 MHz
• Overcurrent Protection
• Inductor DCR Sensing for Overcurrent
• R_DS(on) Sensing for Zero Current Detection
• Overvoltage and Undervoltage Protection
• Open Drain Power Good Indication
• Internal Bootstrap Switch
• Integrated High-Current Drivers Powered by
VCCDR
• Small 3 mm x 3 mm, 16-Pin QFN Package
APPLICATIONS
• Server and Desktop Computer Subsystem
Power Supplies
• DDR Memory and Termination Supply
• Distributed Power Supply
• General DC/DC Converter
DESCRIPTION
TPS53211 is a single phase PWM controller with
integrated high-current drivers. It is used for 1.5 V up
to 19 V conversion voltage.
TPS53211 features a skip mode solution that
optimizes the efficiency at light load condition without
compromising the output voltage ripple. The device
provides pre-biased startup, soft-stop, integrated
bootstrap switch, power good function, EN/Input
UVLO protection. It supports conversion voltages up
to 19 V, and output voltages adjustable from 0.8 V to
0.7×V_IN.
The TPS53211 is available in the 3 mm × 3 mm,
16-pin, QFN package (Green RoHs compliant and Pb
free) and is specified from –40°C to 85°C.
V_IN
Power
Enable Good
8
COMP
9 FB
7
6
5
EN PGOOD UGATE
BOOT 4
10 VSEN
11 FBG
PHASE 3
TPS53211
LGATE 2
12 CSN
CSP
13
OSC
14
VCCDR 1
VCC GND
15 16
V_OUT
PVCC
UDG-11173
1
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