Datasheet > NCP1550

NCP1550

更新时间： 2024-09-20 04:37:55

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
17页	198K
描述
600 kHz PWM/PFM Step−Down DC−DC Controller

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中文翻译

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NCP1550 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

TSOP−5

SN SUFFIX

CASE 483

Features

• High Efficiency 92%, Typical

MARKING DIAGRAM

• 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

• PWM Switching Frequency at 600 kHz

xxxAYW G

• 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

xxx = Specific Device Code

= Assembly Location

= Year

= Work Week

= Pb−Free Package

(Note: Microdot may be in either location)

• Internal Undervoltage Lockout (UVLO) Protection

• Low Profile and Minimum External Components

• Micro Miniature TSOP−5 Package

• Pb−Free Packages are Available

PIN CONNECTIONS

Typical Applications

• Personal Digital Assistant (PDA)

• Camcorders and Digital Still Camera

• Hand−Held Instrument

GND

EXT

OUT

• Distributed Power System

• Computer Peripheral

(Top View)

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

3.3 V/1.8 V

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 16 of this data sheet.

Publication Order Number:

July, 2006 − Rev. 8

NCP1550/D

12 3 4 5 6 7...17

中文翻译

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与NCP1550相关器件

型号	品牌	获取价格	描述	数据表
NCP1550_06	ONSEMI	获取价格	600 kHz PWM/PFM Step−Down DC−DC Controller
NCP1550SN18T1	ONSEMI	获取价格	600 kHz PWM/PFM Step-Down DC-DC Controller
NCP1550SN18T1G	ONSEMI	获取价格	600 kHz PWM/PFM Step-Down DC-DC Controller
NCP1550SN19T1	ONSEMI	获取价格	600 kHz PWM/PFM Step-Down DC-DC Controller
NCP1550SN19T1G	ONSEMI	获取价格	600 kHz PWM/PFM Step−Down DC−DC Controller
NCP1550SN25T1	ONSEMI	获取价格	600 kHz PWM/PFM Step-Down DC-DC Controller
NCP1550SN25T1G	ONSEMI	获取价格	600 kHz PWM/PFM Step−Down DC−DC Controller
NCP1550SN27T1	ONSEMI	获取价格	600 kHz PWM/PFM Step-Down DC-DC Controller
NCP1550SN27T1G	ONSEMI	获取价格	600 kHz PWM/PFM Step−Down DC−DC Controller
NCP1550SN30T1	ONSEMI	获取价格	600 kHz PWM/PFM Step-Down DC-DC Controller

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