Datasheet > NCP1450A

NCP1450A

更新时间： 2024-09-19 22:54:31

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
24页	205K
描述
PWM Step-up DC-DC Controller

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NCP1450A 数据手册

NCP1450A

PWM Step−up DC−DC

Controller

The NCP1450A series are PWM step-up DC-DC switching

controller that are specially designed for powering portable equipment

from one or two cells battery packs. The NCP1450A series have a

driver pin, EXT pin, for connecting to an external transistor. Large

output currents can be obtained by connecting a low ON-resistance

external power transistor to the EXT pin. The device will

automatically skip switching cycles under light load condition to

maintain high efficiency at light loads. With only six external

components, this series allows a simple means to implement highly

efficient converter for large output current applications.

Each device consists of an on-chip PWM (Pulse Width Modulation)

oscillator, PWM controller, phase- compensated error amplifier,

soft-start, voltage reference, and driver for driving external power

transistor. Additionally, a chip enable feature is provided to power

down the converter for extended battery life.

http://onsemi.com

TSOP-5

SN SUFFIX

CASE 483

The NCP1450A device series are available in the TSOP-5 package

with five standard regulated output voltages. Additional voltages that

range from 1.8 V to 5.0 V in 100 mV steps can be manufactured.

PIN CONNECTIONS AND

MARKING DIAGRAM

Features

OUT

EXT

• High Efficiency 86% at I = 200 mA, V = 2.0 V, V

= 3.0 V

= 5.0 V

OUT

88% at I = 400 mA, V = 3.0 V, V

OUT

• Low Start-up Voltage of 0.9 V typical at I = 1.0 mA

GND

• Operation Down to 0.6 V

xxx = Marking

• Five Standard Voltages: 1.9 V, 2.7 V, 3.0 V, 3.3 V, 5.0 V with High

Accuracy ± 2.5%

= Year

= Work Week

• Low Conversion Ripple

(Top View)

• High Output Current up to 1000 mA

(3.0 V version at V = 2.0 V, L = 10 m H, C

= 220 Fm)

OUT

• Fixed Frequency Pulse Width Modulation (PWM) at 180 kHz

• Chip Enable Pin with On-chip 150 nA Pull-up Current Source

• Low Profile and Micro Miniature TSOP-5 Package

ORDERING INFORMATION

See detailed ordering and shipping information in the ordering

information section on page 3 of this data sheet.

Typical Applications

• Personal Digital Assistant (PDA)

• Electronic Games

• Portable Audio (MP3)

• Digital Still Cameras

• Handheld Instruments

Semiconductor Components Industries, LLC, 2003

Publication Order Number:

April, 2003 - Rev. 5

NCP1450A/D

12 3 4 5 6 7...24

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