SC1633 Datasheet | SEMTECH

LOW VOLTAGE STEP-UP DC-DC CONVERTER January 29, 1998 TEL:805-498-2111 FAX:805-498-3804 WEB:http://.semtech. DESCRIPTION The SC1633 is a high efficiency step up DC-DC converter. Only four external ponents are required to deliver a fixed voltage of 3V, 3.3V, or 5V. Efficiency beyond 83% can be easily achieved at 70m A load with 2.2V to 3V input voltages. A logic-controlled shutdown mode is provided for power saving. Switch current limit can be programmed with a resistor. The low battery detector can be configured as a linear regulator or a burst mode controller providing extremely low supply current operation. A switching rate of 120k Hz reduces the inductor size inductors of 47µH to 150µH inductance are remended for most applications. Features - High efficiency 87% - Power-saving shutdown mode (7µA typical) - Internal 0.8A switch - 120k Hz switching rate - Adjustable switch current limit - On-chip low battery detector APPLICATIONS - Pocket organizers - Electronic dictionaries - Cameras - Pagers - Bar code scanners - LCD displays - Battery backup supplies - Portable instruments ORDERING INFORMATION BLOCK DIAGRAM DEVICE (1) VOLTAGE 3.3V 3.0V 5.0V PACKAGE SO-8 SC1633CS SC1633-3CS SC1633-5CS Note: (1) Add suffix ‘TR’ for tape and...