Datasheet > NCP1550SN33T1G

NCP1550SN33T1G

更新时间： 2024-11-19 21:55:11

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
18页	195K
描述
600 kHz PWM/PFM Step-Down DC-DC Controller

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NCP1550SN33T1G 数据手册

NCP1550

600 kHz PWM/PFM

Step−Down DC−DC

Controller

The NCP1550 is a monolithic micropower high frequency

voltage mode step−down controller IC, specially designed for battery

operated hand−held electronic products. With appropriate external

P−type MOSFET, the device can provide up to 2.0 A loading

current with high conversion efficiency. The device operates in

Constant−Frequency PWM mode at normal operation, that ensures

low output ripple noise, and which will automatically switch to PFM

mode at low output loads for higher efficiency. Additionally,

value−added features of Chip Enable to reduce IC Off−State current

and integrated feedback resistor network, make it the best choice for

portable applications. The device is designed to operate for voltage

regulation with minimum external components and board space. This

device is available in a TSOP−5 package with six standard output

voltage options.

http://onsemi.com

MARKING

DIAGRAM

TSOP−5

SN SUFFIX

CASE 483

xxxYW

xxx = Device Code

= Year

= Work Week

Features

• Pb−Free Packages are Available

• High Efficiency 92%, Typical

PIN CONNECTIONS

• Low Quiescent Bias Current of 50 mA (Typical at PFM Mode with

No Load)

• Output Voltage Options from 1.8 V to 3.3 V with High Accuracy

$2.0%

• Low Output Voltage Ripple, 50 mV, Typical

GND

EXT

OUT

• PWM Switching Frequency at 600 kHz

• Automatic PWM/PFM Switchover at Light Load Condition

• Very Low Dropout Operation, 100% Max. Duty Cycle

• Chip Enable Pin with On−Chip 150 nA Pullup Current Source

• Low Shutdown Current, 0.3 mA, Typical

• Input Voltage Range from 2.45 V to 5.5 V

• Built−in Soft−Start

(Top View)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 16 of this data sheet.

• Internal Undervoltage Lockout (UVLO) Protection

• Low Profile and Minimum External Components

• Micro Miniature TSOP−5 Package

Typical Applications

• Personal Digital Assistant (PDA)

• Camcorders and Digital Still Camera

• Hand−Held Instrument

• Distributed Power System

• Computer Peripheral

• Conversion from Four NiMH or NiCd or One Lithium−ion Cells to

3.3 V/1.8 V

Semiconductor Components Industries, LLC, 2004

Publication Order Number:

September, 2004 − Rev. 6

NCP1550/D

12 3 4 5 6 7...18

中文翻译

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NCP1550SN33T1G 替代型号

型号	品牌	替代类型	描述	数据表
NCP1550SN33T1	ONSEMI	功能相似	600 kHz PWM/PFM Step-Down DC-DC Controller

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