TPS51317 Datasheet, PDF (1/25 Pages) Texas Instruments – 3.3-V/5-V Input, 6-A, D-CAP+™ Mode Synchronous Step-Down Integrated FETs Converter

TPS51317
www.ti.com
SLUSAH9 – MARCH 2011
3.3-V/5-V Input, 6-A, D-CAP+™ Mode Synchronous Step-Down Integrated FETs Converter
Check for Samples: TPS51317
FEATURES
1
•2 Integrated FETs Converter w/TI Proprietary
D-CAP+™ Mode Architecture
• Minimum External Components Count
• Support all MLCC Output Capacitor and
SP/POSCAP
• Auto-Skip Mode and Ripple Reduction Mode
• Optimized Efficiency at Light and Heavy Loads
• Selectable 800-kHz, 1-MHz, 1.2-MHz and
1.5-MHz Frequency
• Up to 6.0-V Conversion Voltage Range
• Adjustable Output Voltage Range From 0.6 V
to 2 V
• Small 3.5 mm × 4 mm, 20-Pin QFN Package
APPLICATIONS
• Low-Voltage Applications Stepping Down from
5-V or 3.3-V Rail
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DESCRIPTION
The TPS51317 is a fully integrated synchronous buck
regulator employing D-CAP+™ mode architechture. It
is used for 3.3-V and 5-V step-down systems where
space is a consideration, high-performance and
optimized component count are required. The
TPS51317 features four switching frequency settings
(up to 1.5 MHz), synchronous operation in SKIP,
droop support, external tracking support, pre-bias
startup, output soft discharge, integrated bootstrap
switch, power good function, enable function and
complete protection functions, and both output
ceramic and SP/POS capacitor support. It supports
supply and conversion voltages up to 6.0 V, and
output voltages adjustable from 0.6 V to 2.0V. The
TPS51317 is available in the 3.5 mm × 4 mm 20-pin
QFN package (Green RoHs compliant and Pb free)
and is specified from -40°C to 85°C.
VIN
5VIN
GND GND
TPS51317
VIN
BST 16
17 EN
SW
8 COMP PGOOD 19
7 VREF PGND
9 REFIN
VOUT 10
MODE 18
20 V5IN
GND 6
PGOOD
V
OUT
PGND GND
PGND
GND
UDG-11041
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.
D-CAP+ is a trademark of Texas Instruments.
2
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