NCP1400A Ver la hoja de datos (PDF) - ON Semiconductor

Número de pieza

componentes Descripción

Fabricante

NCP1400A

100 mA, Fixed Frequency PWM Step−Up Micropower Switching Regulator

ON Semiconductor 

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 Thin SOT23−5

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

• Pb−Free 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 SOT23−5

SN SUFFIX

CASE 483

PIN CONNECTIONS AND

MARKING DIAGRAM

CE 1

5 LX

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

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 Step−Up Converter

Application

© Semiconductor Components Industries, LLC, 2006

1

March, 2006 − Rev. 11

Publication Order Number:

NCP1400A/D

Share Link: