Datasheet > NCP1547

NCP1547

更新时间： 2024-09-20 04:37:55

品牌	Logo	应用领域
安森美 - ONSEMI		稳压器
页数	文件大小	规格书
13页	157K
描述
1.5 A, 340 kHz, Buck Regulator with Synchronization Capability

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NCP1547 数据手册

NCP1547

1.5 A, 340 kHz, Buck

Regulator with

Synchronization Capability

The NCP1547 is a 1.5 A buck regulator IC operating at a

fixed−frequency of 340 kHz. The device uses the V t control

http://onsemi.com

architecture to provide unmatched transient response, the best overall

regulation and the simplest loop compensation for today’s high−speed

logic. The NCP1547 accommodates input voltages from 4.5 V to 40 V

and contains synchronization circuitry.

The on−chip NPN transistor is capable of providing a minimum of

1.5 A of output current, and is biased by an external “boost” capacitor

to ensure saturation, thus minimizing on−chip power dissipation.

Protection circuitry includes thermal shutdown, cycle−by−cycle

current limiting and frequency foldback.

MARKING

DIAGRAM

NCP1547

AWLYYWW G

18−LEAD DFN

MN SUFFIX

CASE 505

Features

• V Architecture Provides Ultra−Fast Transient Response, Improved

Regulation and Simplified Design

= Assembly Location

WL = Wafer Lot

YY = Year

WW = Work Week

• 2.0% Error Amp Reference Voltage Tolerance

• Switch Frequency Decrease of 4:1 in Short Circuit Conditions

Reduces Short Circuit Power Dissipation

= Automotive Grade

= Pb−Free Package

• BOOST Lead Allows “Bootstrapped” Operation to Maximize

Efficiency

(Note: Microdot may be in either location)

• Sync Function for Parallel Supply Operation or Noise Minimization

• Shutdown Lead Provides Power−Down Option

• 1.0 mA Quiescent Current During Power−Down

• Thermal Shutdown

• Soft−Start

• This is a Pb−Free Device

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 12 of this data sheet.

Semiconductor Components Industries, LLC, 2007

Publication Order Number:

March, 2007 − Rev. 0

NCP1547/D

12 3 4 5 6 7...13

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