SC1462

HIGH OUTPUT CURRENT CHARGE PUMP DOUBLER October 20, 2000 SC1462 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1462 is a versatile charge pump designed for use in battery operated power supply applications over the wide input range of 1.65 to 5.5 volts. A simple, low quiescent current charge pump doubler can be implemented without costly inductors or capacitors. Internal MOSFETs and control circuitry eliminate the need for costly board space and design time. The small 6 lead SOT-23 package helps minimize board space. The SC1462 charge pump can be used for applications that require up to 80mA of output current with VIN = 2.5V to 5.5V. Typical dropout voltage (2*Vin-Vout) is shown below for several values of Vin. T ypical Dropou t Voltage vs Iou t @T a = 25 D eg. C . 0.9 0.8 Vin = 1.5V Vin = 2.5V Vin = 3.6V Vin = 4.5V Vin = 5.5V FEATURES = Input supply voltage range of 1.65V to 5.5V = Small size - 6 pin SOT-23 package = Typical efficiency of : = = = = = = 91% @ Vin = 2.5V, Iout = 45mA 94% @ Vin = 3.6V, Iout = 55mA Short circuit and over-temperature protection 140µA typical input current @ no load Shutdown current <1µA Designed to work with ceramic or Tantalum capacitors Fixed frequency of 160kHz All specifications rated over full temperature range (-40°C to 85°C) APPLICATIONS = Cellular phones = Handheld devices ORDERING INFORMATION DEVICE (1) Ou tpu t D ropou t Voltage (V) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 000E+0 PACKAGE SOT-23-...