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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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SC1628CS Fiches technique(PDF) 1 Page - Semtech Corporation |
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SC1628CS Fiches technique(HTML) 1 Page - Semtech Corporation |
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1 / 4 page  © 1997 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 HIGH-EFFICIENCY STEP-UP DC-DC CONVERTER SC1628 January 30, 1998 Note: (1) Add suffix ‘TR’ for tape and reel. FEATURES • 4V to 24V input voltage operation • Adjustable output voltage • Low quiescent current at 100µA • Pulse-skipping and pulse-frequency modulation maintain high efficiency (max. 95%) • 90kHz to 250kHz oscillator frequency • Power-saving shutdown mode (8µA typical) • Push-pull driver output DESCRIPTION The SC1628 is a high performance step-up DC-DC converter, designed to drive an external power switch to generate programmable positive voltages. In the particularly suitable LCD contrast bias and flash memory programming power supply applications, typical full load efficiencies are 85% to 95%. The 4V to 24V input operation range allows the SC1628 to be powered directly by the battery pack in most battery- powered applications for greater efficiency. The output voltage can be scaled to 40V or greater 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 100µA and can be reduced down to 8µA in shutdown mode. With a switching frequency range of 90kHz to 250kHz, small size switching components may be used, which is ideal for battery powered portable equipment such as notebook and palmtop computers. TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com BLOCK DIAGRAM APPLICATIONS • Flash memory programming power supply • Positive LCD contrast bias for notebook and palm- top computers • Step-up DC-DC converter module • Telecom power supply ORDERING INFORMATION ABSOLUTE MAXIMUM RATINGS Parameter Symbol Maximum Units Supply Voltage V IN 24 V SHDN Voltage V SHDN 15 V Operating Temperature Range T A 0 to 70 °C Storage Temperature Range T STG -65 to 125 °C PIN CONFIGURATION DEVICE (1) PACKAGE SC1628CS SO-8 |
Numéro de pièce similaire - SC1628CS |
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Description similaire - SC1628CS |
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