TPS51315_14 Datasheet, PDF (1/33 Pages) Texas Instruments – 10-A STEP-DOWN SYNCHRONOUS SWITCHER WITH INTEGRATED MOSFETs

Not Recommended for New Designs
TPS51315
www.ti.com
SLUS881B – MAY 2009 – REVISED AUGUST 2012
10-A STEP-DOWN SYNCHRONOUS SWITCHER WITH INTEGRATED MOSFETs
Check for Samples: TPS51315
FEATURES
1
•2 Input Voltage Range: 3 V to 14 V
• Output Voltage Range: 0.75 V to 5.5 V
• Integrated Power MOSFETs with 10-A
Continuous Current Output
• < 5-μA Shutdown Current
• D-CAP™ Mode with Fast Transient Response
• Programmable Switching Frequency with
External Resistor From 100 kHz to 1 MHz
• Selectable Auto-Skip or PWM-Only Operation
• < 1% Initial Reference Accuracy
• Internal Soft-Start Control
• Integrated Boost Diode
• Power Good Signal
• Adjustable Overcurrent Limit via External
Resistor
• OVP/UVP/UVLO Protection
• Integrated Selectable Output Discharge
• Prebias Output Voltage Start-Up with Disabled
Output Discharge
• Thermal Shutdown
• 40-Pin QFN Package with Exposed Thermal
Pad
• Supports All Ceramic Output Capacitors
APPLICATIONS
• Portable Device Application
• Notebook Computers
• Server and Desktop
DESCRIPTION
The TPS51315 is a D-CAP™ Mode, 10-A,
synchronous step-down converter with integrated
MOSFETs. The combination of D-CAP™ mode and
on-board MOSFETs provides fast transient response
performance with ease of use, less external
component count and small footprint. Externally
adjustable switching frequency allows optimal design
between component size and efficiency tradeoff.
Ceramic output capacitors can be employed by
adding a few extra components. The TPS51315 is
available in the thermally-efficient 40-pin, 5 mm x
7 mm, QFN package and is specified from -40°C to
85°C ambient.
R1
5V
R2
32 31 30 29 28 27 26 25 24 23 22 21
ENSW
R4
R3
R5
R7
PGOOD
C3
C4
33 N/C
34 EN_PSV
35 TON
36 VOUT
37 VOUT_DS
38 V5FILT
39 VFB
40 PGOOD
TPS51315
LL 20
LL 19
LL 18
LL 17
LL 16
VIN 15
VIN 14
VIN 13
R6
1 2 3 4 5 6 7 8 9 10 11 12
L1
V_OUT
C1
V_IN
3 V to 14 V
C2
UDG-08154
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 © 2009–2012, Texas Instruments Incorporated