SC1464

60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 SC1464 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1464 is a versatile charge pump designed for use in battery operated power supply applications. A simple, low current charge pump doubler can be implemented without costly inductors or capacitors. Internal MOSFET’s and control circuitry eliminate the need for costly board space and design time. The small device footprint allows for compact circuit design. The SC1464 charge pump can be used for applications that require up to 60mA of output current with VIN = 2.85V and VOUT = 5.2V. The small 8 lead MSOP-8 package helps minimize board space. The TF1 and TF2 pins provide binary control of the oscillator frequency to either 1 MHz, 260kHz, 32kHz or 8kHz. The user can change the frequency during operation with extremely fast settling time. FEATURES = Small size - MSOP-8 package = Typical efficiency of 90% @ full load = Designed to work with ceramic or tantalum = = = = = = = capacitors Soft start functionality Short-Circuit and Over-Temperature protection <55µA input current @ no load (TF1=0;TF2=1) <330µA input current @ no load (TF1=0;TF2=0) Oscillator frequency accurate to ±5% Shutdown current < 1µA All Specifications rated over the full temperature range (-40°C to 85 °C) APPLICATIONS = = = = Cellular phones Handheld devices PDA power supplies Peripheral card supplies ORDERING INFORMATION Part ...