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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.
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