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NCP1400A-D Datasheet, PDF (1/16 Pages) ON Semiconductor – 100mA, Fixed Frequency PWM Step-Up Micropower Switching Regulator | |||
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NCP1400A
100 mA, Fixed Frequency
PWM StepâUp Micropower
Switching Regulator
The NCP1400A series are micropower stepâup DC to DC
converters that are specifically designed for powering portable
equipment from one or two cell battery packs. These devices are
designed to startâup 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 onâchip fixed frequency oscillator, pulse
width modulation controller, phase compensated error amplifier that
ensures converter stability with discontinuous mode operation,
softâstart, 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 Thin SOT23â5
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 StartâUp 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
⢠PbâFree Packages are Available
Typical Applications
⢠Cellular Telephones
⢠Pagers
⢠Personal Digital Assistants
⢠Electronic Games
⢠Digital Cameras
⢠Camcorders
⢠Handheld Instruments
⢠White LED Torch Light
http://onsemi.com
5
1
THIN SOT23â5
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
CE 1
5 LX
OUT 2
NC 3
4 GND
(Top View)
xxx = Marking
Y = Year
W = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 2 of this data sheet.
VIN
CE
1
OUT
2
NC
3
LX
5
GND
4
VOUT
Figure 1. Typical StepâUp Converter
Application
© Semiconductor Components Industries, LLC, 2004
1
June, 2004 â Rev. 9
Publication Order Number:
NCP1400A/D
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