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SC1652 - MICROPOWER INVERTING DC-DC CONVERTER

General Description

The SC1652 is a high performance inverting DC-DC converter, designed to drive an external power switch to generate programmable negative voltages.

In the particularly suitable LCD bias contrast application, efficiency of 87% can be achieved with low cost PNP bipolar transistor drivers.

Key Features

  • 2.4V to 7V input voltage operation.
  • Adjustable output voltage up to -40V.
  • Low quiescent current at 80µA.
  • Pulse frequency modulation maintains high.
  • efficiency (max 87%) 70kHz to 160kHz switching frequency Power-saving shutdown mode (0.7µA typical) High efficiency with low cost external PNP bipolar transistor.

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Datasheet Details

Part number SC1652
Manufacturer SEMTECH
File Size 81.74 KB
Description MICROPOWER INVERTING DC-DC CONVERTER
Datasheet download datasheet SC1652 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MICROPOWER INVERTING DC-DC CONVERTER January 29, 1998 SC1652 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1652 is a high performance inverting DC-DC converter, designed to drive an external power switch to generate programmable negative voltages. In the particularly suitable LCD bias contrast application, efficiency of 87% can be achieved with low cost PNP bipolar transistor drivers. The output voltage can be scaled to -40V by two external resistors. A pulse frequency modulation scheme is employed to maintain high efficiency conversion under wide input voltage ranges. Quiescent current is about 80µA and can be reduced to 0.7µA in shutdown mode.