TPS51211_15 Datasheet, PDF (1/29 Pages) Texas Instruments – High-Performance, Single Synchronous Step-Down Controller For Notebook Power Supply

TPS51211
www.ti.com
SLUSAA7B – NOVEMBER 2010 – REVISED MAY 2013
High-Performance, Single Synchronous Step-Down
Controller For Notebook Power Supply
FEATURES
1
•2 Wide Input Voltage Range: 3 V to 28 V
• Output Voltage Range: 0.7 V to 2.6 V
• Wide Output Load Range: 0 to 20A+
• Built-in 0.5% 0.7 V Reference
• 290-kHz, Adaptive On-Time D-CAP™ MODE
Control
• 4700 ppm/°C R_DS(on) Current Sensing
• Internal 1-ms Voltage Servo Soft-start
• Pre-Charged Start-up Capability
• Built in Output Discharge
• Power Good Output
• Integrated Boost Switch
• Built-in OVP/UVP/OCP
• Thermal Shutdown (Non-latch)
• SON-10 (DSC) Package
APPLICATIONS
• Notebook Computers
• I/O Supplies
• System Power Supplies
DESCRIPTION
The TPS51211 is a small-sized single buck controller
with adaptive on-time D-CAP™ mode. The device is
suitable for low output voltage, high current, PC
system power rail and similar point-of-load (POL)
power supply in digital consumer products. A small
package with minimal pin-count saves space on the
PCB, while a dedicated EN pin and pre-set frequency
minimize design effort required for new designs. The
skip-mode at light load condition, strong gate drivers
and low-side FET R_DS(on) current sensing supports
low-loss and high efficiency, over a broad load range.
The conversion input voltage which is the high-side
FET drain voltage ranges from 3 V to 28 V and the
output voltage ranges from 0.7 V to 2.6 V. The device
requires an external 5-V supply. The TPS51211 is
available in a 10-pin SON package specified from
–40°C to 85°C.
TYPICAL APPLICATION CIRCUIT
V5IN
V_IN
TPS51211
1 PGOOD VBST 10
2 TRIP
DRVH 9
EN
3 EN
SW 8
4 VFB
V5IN 7
5 TST
DRVL 6
GND
V_OUT
V_OUT_GND
UDG-10160
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 © 2010–2013, Texas Instruments Incorporated