SW

EN

PG

VIN

VOUT

FB

ILIM

GND

2

3

4

1

7

6

5

8

TPS61251

www.ti.com

SLVSAF7B – SEPTEMBER 2010 – REVISED JULY 2015

5 Description (Continued)

The TPS61251 device in combination with a reservoir capacitor allows the converter to provide high current

pules that would exceed the capability of the suppling circuit (PC slot, USB) and keeps the slot power safely

within its capabilities. During light loads the device will automatically enters an enhanced power save mode

(Snooze Mode), which allows the converter to maintain the required output voltage, while only drawing 2

μA from

the battery. This will allow maximum efficiency at lowest quiescent currents.

TPS61251 device allows the use of small inductors and input capacitors to achieve a small solution size. During

shutdown, the load is completely disconnected from the battery and will not discharge either the battery nor the

charged bulk capacitor. The TPS61251 device is available in a 8-pin QFN package measuring 2 × 2 mm (DSG).

6 Device Options

Adjustable

TPS61251

(1)

Contact TI for other fixed output voltage options

(2)

For detailed ordering information please check the Mechanical,

Packaging, and Orderable Information section at the end of this data

sheet.

7 Pin Configuration and Functions

DSG Package

8-Pin WSON

Top View

Pin Functions

PIN

I/O

DESCRIPTION

NAME

NO.

EN

6

I

Enable input (1 enabled, 0 disabled)

FB

3

I

Voltage feedback pin

GND

1

Ground

ILIM

4

I

for minimum current limit.

PG

5

O

Output power good (1 good, 0 failure; open drain)

SW

7

I

Connection for Inductor

VIN

8

I

Supply voltage for power stage

VOUT

2

O

Boost converter output

Exposed

Must be soldered to achieve appropriate power dissipation and for mechanical reasons. Must be

Thermal Pad

connected to GND.

Copyright © 2010–2015, Texas Instruments Incorporated

Submit Documentation Feedback

3

Product Folder Links: TPS61251