Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

LM2621

SNVS033D – MAY 2004 – REVISED NOVEMBER 2015

LM2621 Low Input Voltage, Step-Up DC-DC Converter

1 Features

3 Description

The LM2621 is a high efficiency, step-up DC-DC

1

•

Small VSSOP8 Package (Half the Footprint of

switching regulator for battery-powered and low input

Standard 8-Pin SOIC Package)

voltage systems. It accepts an input voltage between

•

1.09-mm Package Height

1.2 V and 14 V and converts it into a regulated output

•

Up to 2-MHz Switching Frequency

voltage. The output voltage can be adjusted between

1.24 V and 14 V. It has an internal 0.17-

Ω N-Channel

•

1.2-V to 14-V Input Voltage

MOSFET power switch. Efficiencies up to 90% are

•

1.24-V to 14-V Adjustable Output Voltage

achievable using the LM2621.

•

Up to 1A Load Current

The high switching frequency (adjustable up to 2

•

0.17-

Ω Internal MOSFET

MHz) of the LM2621 allows for tiny surface mount

•

Up to 90% Regulator Efficiency

inductors and capacitors. Because of the unique

constant-duty-cycle gated oscillator topology very

•

80-µA Typical Operating Current

high efficiencies are realized over a wide load range.

•

< 2.5-µA Specified Supply Current In Shutdown

The supply current is reduced to 80 µA because of

the BiCMOS process technology. In the shutdown

2 Applications

mode, the supply current is less than 2.5 µA.

•

PDAs, Cellular Phones

The LM2621 is available in a VSSOP-8 package.

•

2-Cell and 3-Cell Battery-Operated Equipment

This package uses half the board area of a standard

8-pin SOIC and has a height of just 1.09 mm.

•

PCMCIA Cards, Memory Cards

•

Flash Memory Programming

Device Information(1)

•

TFT/LCD Applications

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

3.3-V to 5.0-V Conversion

LM2621

VSSOP (8)

3.00 mm x 3.00 mm

•

GPS Devices

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

•

Two-Way Pagers

the end of the datasheet.

•

Palmtop Computers

•

Hand-Held Instruments

Typical Application Circuit

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.