0.01

0.1

1

10

100

2.8

2.3

1.8

1.3

0.8

OUT

I

- Output Current - mA

OUT

(V

= 3.3V)

Efficiency vs Output Current and Input Voltage

L

C

1

10 µF

L

1

4.7 µH

VIN

VOUT

FB

C

2

10µF

EN

GND

TPS61220

1.8 V to 6 V

R

1

R

2

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

Reference

Design

TPS61220, TPS61221, TPS61222

SLVS776B – JANUARY 2009 – REVISED NOVEMBER 2014

TPS6122x Low Input Voltage, 0.7V Boost Converter With 5.5

μA Quiescent Current

1 Features

3 Description

The TPS6122x family devices provide a power-supply

1

•

Up to 95% Efficiency at Typical Operating

solution for products powered by either a single-cell,

Conditions

two-cell, or three-cell alkaline, NiCd or NiMH, or one-

•

5.5

μA Quiescent Current

cell Li-Ion or Li-polymer battery. Possible output

•

Startup Into Load at 0.7 V Input Voltage

currents depend on the input-to-output voltage ratio.

The boost converter is based on a hysteretic

•

Operating Input Voltage from 0.7 V to 5.5 V

controller topology using synchronous rectification to

•

Pass-Through Function during Shutdown

obtain maximum efficiency at minimal quiescent

•

Minimum Switching Current 200 mA

currents. The output voltage of the adjustable version

can be programmed by an external resistor divider, or

•

Protections:

is set internally to a fixed output voltage. The

–

Output Overvoltage

converter can be switched off by a featured enable

–

Overtemperature

pin. While being switched off, battery drain is

minimized. The device is offered in a 6-pin SC-70

–

Input Undervoltage Lockout

package (DCK) measuring 2 mm x 2 mm to enable

•

Adjustable Output Voltage from 1.8 V to 6 V

small circuit layout size.

•

Fixed Output Voltage Versions

•

Small 6-pin SC-70 Package

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

2 Applications

TPS61220

•

Battery Powered Applications

TPS61221

SC-70 (6)

2.00mm x 1.25mm

TPS61222

–

1 to 3 Cell Alkaline, NiCd or NiMH

–

1 cell Li-Ion or Li-Primary

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

the end of this document.

•

Solar or Fuel Cell Powered Applications

•

Consumer and Portable Medical Products

•

Personal Care Products

•

White or Status LEDs

•

Smartphones

4 Simplified Schematic

1

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.