NCP1571

更新时间： 2024-09-19 21:53:27

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
16页	108K
描述
Low Voltage Synchronous Buck Controller

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NCP1571 数据手册

NCP1571

Low Voltage Synchronous

Buck Controller

The NCP1571 is a low voltage buck controller. It provides the

control for a DC−DC power solution producing an output voltage as

low as 0.980 V over a wide current range. The NCP1571−based

solution is powered from 12 V with the output derived from a 2−7 V

supply. It contains all required circuitry for a synchronous NFET buck

http://onsemi.com

regulator using the V t control method to achieve the fastest possible

MARKING

DIAGRAM

transient response and best overall regulation. NCP1571 operates at a

fixed internal 200 kHz frequency and is packaged in an SOIC−8.

This device provides undervoltage lockout protection, Soft−Start,

Power Good with delay, and built−in adaptive non−overlap. During

undervoltage lockout, the NCP1571 controller allows the power

supply output to drift down, allowing the load time to shut off. This

operation distinguishes the NCP1571 from other parts in its family.

SOIC−8

D SUFFIX

CASE 751

1571

ALYW

Features

= Assembly Location

= Wafer Lot

= Year

• Pb−Free Package is Available

• 0.980 V ± 1.0% Reference Voltage

= Work Week

• V Control Topology

• 200 ns Transient Response

• Programmable Soft−Start

• Power Good

• Programmable Power Good Delay

• 40 ns Gate Rise and Fall Times (3.3 nF Load)

• Adaptive FET Non−Overlap Time

PIN CONNECTIONS

GND

PWRGD

PGDELAY

COMP

GATE(L)

GATE(H)

• Fixed 200 kHz Oscillator Frequency

• Undervoltage Lockout Holds Both Gate Outputs Low

• On/Off Control Through Use of the COMP Pin

• Overvoltage Protection through Synchronous MOSFETs

• Synchronous N−Channel Buck Design

• Dual Supply, 12 V Control, 2−7 V Power Source

ORDERING INFORMATION

†

Device

Package

SOIC−8

Shipping

NCP1571D

98 Units/Rail

NCP1571DR2

NCP1571DR2G

2500 Tape & Reel

SOIC−8

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

Semiconductor Components Industries, LLC, 2004

Publication Order Number

October, 2004 − Rev. 4

NCP1571/D

12 3 4 5 6 7...16

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