Fixed Frequency PWM Step-Up Micropower Switching Regulator - ON Semiconductor
Description
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 Pb−Free and are RoHS Compliant
Typical Applications
• Cellular Telephones • Pagers • Personal Digital Assistants • Electronic Games • Digital Cameras • Camcorders • Handheld Instruments • White LED Torch Light
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5 1
TSOP−5 SN SUFFIX CASE 483
PIN CONNECTIONS AND MARKING DIAGRAM
CE 1
5 LX
xxxAYW G G
OUT 2
NC 3
4 GND
(Top View)
xxx = Marking A = Assembly Location Y = Year W = Work Week G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
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