LM2622 600kHz/1.3MHz Step-up PWM DC/DC Converter
May 2004
LM2622
600kHz/1.3MHz Step-up PWM DC/DC Converter
General Description
The LM2622 is a step-up DC/DC converter with a 1.6A, 0.2Ω
internal switch and pin selectable operating frequency. With
the ability to convert 3.3V to multiple outputs of 8V, -8V, and
23V, the LM2622 is an ideal part for biasing TFT displays.
The LM2622 can be operated at switching frequencies of
600kHz and 1.3MHz allowing for easy filtering and low noise.
An external compensation pin gives the user flexibility in
setting frequency compensation, which makes possible the
use of small, low ESR ceramic capacitors at the output. The
LM2622 is available in a low profile 8-lead MSOP package.
Features
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1.6A, 0.2Ω, internal switch
Operating voltage as low as 2.0V
600kHz/1.3MHz pin selectable frequency operation
Over temperature protection
8-Lead MSOP package
Applications
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TFT Bias Supplies
Handheld Devices
Portable Applications
GSM/CDMA Phones
Digital Cameras
Typical Application Circuit
10127331
600 kHz Operation
© 2004 National Semiconductor Corporation
DS101273
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