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NCP1400A/D Datasheet

  • NCP1400A/D

  • Micropower Fixed Frequency PWM Step-Up DC-DC Converter

  • 136.39KB

  • 16頁

  • ETC

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NCP1400A
Micropower Fixed
Frequency PWM Step-Up
DC-DC Converter
The NCP1400A series are micropower step鈥搖p DC to DC
converters that are specifically designed for powering portable
equipment from one or two cell battery packs. These devices are
designed to start鈥搖p 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鈥揷hip fixed frequency oscillator, pulse
width modulation controller, phase compensated error amplifier that
ensures converter stability with discontinuous mode operation,
soft鈥搒tart, 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 SOT鈥?3鈥?
package with six standard regulated output voltages. Additional
voltages that range from 1.8 V to 4.9 V in 100 mV steps can be
manufactured.
Features
http://onsemi.com
5
1
THIN SOT鈥?3鈥?
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
CE
OUT
NC
1
xxxYW
2
3
5
LX
鈥?/div>
Extremely Low Start鈥揢p Voltage of 0.8 V
鈥?/div>
Operation Down to Less than 0.2 V
鈥?/div>
Only Four External Components for Simple Highly Efficient
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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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
Cellular Telephones
Pagers
Personal Digital Assistants
Electronic Games
Digital Cameras
Camcorders
Handheld Instruments
4
GND
xxx = Marking
Y
= Year
W = Work Week
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 2 of this data sheet.
Typical Applications
V
in
CE
1
OUT
2
NC
3
NCP1400A
LX
5
V
out
GND
4
Figure 1. Typical Step鈥揢p Converter Application
漏
Semiconductor Components Industries, LLC, 2001
1
June, 2001 鈥?Rev. 3
Publication Order Number:
NCP1400A/D

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