0.001

0.01

0.1

1

10

100

1000

50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

100%

D006

VIN = 3.6 V

VIN = 4.2 V

VIN = 5.0 V

VIN

EN

VSEL1

VSEL2

VSEL3

SW

VOS

GND

L 2.2 PH

10 PF

4.7 PF

2.0 V to 5.5 V

Low Power

MCU & RF

TPS62743

Copyright © 2016, Texas Instruments Incorporated

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS62743, TPS627431

SLVSCQ0A – JUNE 2015 – REVISED MAY 2016

TPS62743 TPS627431 300/400 mA High Efficiency Buck Converter with Ultra-low

Quiescent Current

1

1 Features

1

•

•

Input Voltage Range Down to 2.0 V Once Started

•

Output Current

–

TPS62743 300 mA

–

TPS627431 400mA

•

360 nA Operational Quiescent Current

•

Up to 90% Efficiency at 10-µA Output Current

•

Power Save Mode Operation

•

Selectable Output Voltages

–

8 voltage options between 1.2 V to 3.3 V

•

Output Voltage Discharge

•

Low Output Voltage Ripple

•

Automatic Transition to No Ripple 100% Mode

•

RF Friendly DCS-Control™

•

•

Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package

2 Applications

•

Wearables

•

Fitness Tracker

•

Smart Watch

•

Health Monitoring

•

•

High-efficiency, Ultra Low Power Applications

•

Energy Harvesting

3 Description

The TPS62743 is a high efficiency step down

converter with ultra low quiescent current of typical

360 nA. The device is optimized to operate with a

2.2-µH inductor and 10µF output capacitor. The

device uses DCS-Control™ and operates with a

typical switching frequency of 1.2 MHz. In Power

Save Mode the device extends the light load

efficiency down to a load current range of 10-µA and

below. TPS62743 provides an output current of 300

mA. Once started the device operates down to an

input voltage range of 2.0 V. This allows to operate

The TPS62743 provides 8 programmable output

voltages between 1.2V and 3.3V selectable by three

selection pins. The TPS62743 is optimized to provide

a low output voltage ripple and low noise using a

small output capacitor. Once the input voltage comes

close to the output voltage the device enters the No

Ripple 100% mode to prevent an increase of output

ripple voltage. In this operation mode the device

stops switching and turns the high side MOSFET

switch on.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS62743

DSBGA (8)

1.57 mm × 0.88 mm

TPS627431

DSBGA (8)

1.57 mm x 0.88 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

4 Typical Application