TPS53317 Datasheet, PDF (1/25 Pages) Texas Instruments – 3.3-V/5-V Input, 6-A, D-CAP+ Mode Synchronous Step-Down Integrated FETs

TPS53317
www.ti.com
SLUSAK4 – JUNE 2011
3.3-V/5-V Input, 6-A, D-CAP+™ Mode Synchronous Step-Down Integrated FETs Converter
Check for Samples: TPS53317
FEATURES
1
•2 TI proprietary Integrated MOSFET and
Packaging Technology
• External Tracking
• Minimum External Components Count
• 1-V to 6-V Conversion Voltage
• D-CAP+™ Mode Architecture
• Supports All MLCC Output Capacitors and
SP/POSCAP
• Selectable SKIP and Forced CCM
• Optimized Efficiency at Light and Heavy Loads
• Selectable 600-kHz and 1-MHz Switching
Frequency
• Selectable Overcurrent Limit (OCL)
• Overvoltage Protection and Hiccup
Undervoltage Protection
• Thermal Shutdown
• Adjustable Output Voltage Ranging Between
0.6 V and 2 V
• Small 3.5 mm × 4 mm, 20-Pin QFN Package
APPLICATIONS
• VTT Terminators
• Low-Voltage Applications for 1-V to 6-V
Step-Down Rails
DESCRIPTION
The TPS53317 is a fully-integrated,synchronous buck
regulator employing D-CAP+™ technology. It is used
for rail step-downs from 1 V to 6 V where space is a
consideration, and an optimized component count is
required.
The TPS53317 features two switching frequency
settings (600 kHz and 1 MHz), synchronous operation
in skip (low ripple) mode, integrated droop support,
external tracking support, pre-bias startup, output soft
discharge, integrated bootstrap switch, power good
function, EN/Input UVLO protection, and both output
ceramic and SP/POS/AL capacitor support. It
supports supply and conversion voltages up to 6.0 V,
and output voltages adjustable from 0.6 V to 2.0 V. It
also provides external tracking support.
The TPS53317 is available in the 3.5 mm by 4 mm,
20-pin QFN package (Green RoHs compliant and Pb
free) with TI proprietary Integrated MOSFET and
packaging technology and is specified from -40°C to
85°C.
VIN
5VIN
GND GND
TPS53317
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-11105
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