NCP1547 ON Semiconductor, NCP1547 Datasheet

NCP1547

Manufacturer Part Number

NCP1547

Description

Buck Regulator

Manufacturer

ON Semiconductor

Datasheet

1.NCP1547.pdf (13 pages)

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Price

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Part Number:

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ON Semiconductor

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NCP1547

1.5 A, 340 kHz, Buck

Regulator with

Synchronization Capability

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

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.

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.

Features

•

March, 2007 − Rev. 0

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

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

Regulation and Simplified Design

Reduces Short Circuit Power Dissipation

Efficiency

2.0% Error Amp Reference Voltage Tolerance

Switch Frequency Decrease of 4:1 in Short Circuit Conditions

BOOST Lead Allows “Bootstrapped” Operation to Maximize

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

Architecture Provides Ultra−Fast Transient Response, Improved

www.DataSheet4U.com

t control

See detailed ordering and shipping information in the package

dimensions section on page 12 of this data sheet.

(Note: Microdot may be in either location)

ORDERING INFORMATION

18−LEAD DFN

http://onsemi.com

MN SUFFIX

CASE 505

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Automotive Grade

= Pb−Free Package

Publication Order Number:

AWLYYWW G

NCP1547

MARKING

DIAGRAM

NCP1547/D

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