NCP1400A

NCP1400A 100 mA, Fixed Frequency PWM Step-Up Micropower Switching Regulator The NCP1400A series are micropower step−up DC to DC converters that are specifically designed for powering portable equipment from one or two cell battery packs. These devices are designed to startup with a cell voltage of 0.8 V and operate down to less than 0.2 V. With only four external components, this series allows a simple means to implement highly efficient converters that are capable of up to 100 mA of output current. Each device consists of an on−chip fixed frequency oscillator, pulse width modulation controller, phase compensated error amplifier that ensures converter stability with discontinuous mode operation, soft−start, voltage reference, driver, and power MOSFET switch with current limit protection. Additionally, a chip enable feature is provided to power down the converter for extended battery life. The NCP1400A device series are available in the TSOP−5 package with seven standard regulated output voltages. Additional voltages that range from 1.8 V to 4.9 V in 100 mV steps can be manufactured. Features Extremely Low Startup Voltage of 0.8 V Operation Down to Less than 0.2 V Only Four External Components for Simple Highly Efficient Converters Up to 100 mA Output Current Capability Fixed Frequency Pulse Width Modulation Operation Phase Compensated Error Amplifier for Stable Converter Operation Chip Enable Power Down Capability for Extended Battery Life These Devices are P...