NCP1575/D Datasheet

IC型號：
NCP1575/D
PDF描述：
Low Voltage Synchronous Buck Controller with Adjustable Swit...
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NCP1575

Low Voltage Synchronous

Buck Controller with

Adjustable Switching

Frequency

The NCP1575 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. It contains all required circuitry

for a synchronous NFET buck regulator using the V

鈩?/div>

control

method to achieve the fastest possible transient response and best

overall regulation. The NCP1575 operates at a default switching

frequency of 200 kHz, but switching frequency is user-programmable

with an additional resistor between R

OSC

and ground. This device

provides undervoltage lockout protection, Soft Start, and built-in

adaptive nonoverlap and is assembled in an SO-8 package.

The NCP1575-based solution requires a bias supply of 12 V, and it

can convert from a bulk power supply ranging from 2 V to 12 V.

Conversion from bulk supplies greater than 7 V is best accomplished

by using an external doubler circuit to raise the enhancement voltage

for the external NFET switches.

Features

鈥?/div>

0.980 V

鹵1.0%

Reference Voltage

鈥?/div>

Control Topology

鈥?/div>

200 ns Transient Response

鈥?/div>

Programmable Soft Start

鈥?/div>

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

鈥?/div>

Adaptive FET Nonoverlap Time

鈥?/div>

Default 200 kHz Oscillator Frequency (No External

Resistor Required)

鈥?/div>

User-Programmable Oscillator Frequency (One External

Resistor Required)

鈥?/div>

Undervoltage Lockout

鈥?/div>

On/Off Control Through Use of the COMP Pin

鈥?/div>

Overvoltage Protection through Synchronous MOSFETs

鈥?/div>

Synchronous N-Channel Buck Design

鈥?/div>

鈥?2 V Only鈥?or Dual Supply Operation

http://onsemi.com

SO-8

D SUFFIX

CASE 751

PIN CONNECTIONS AND

MARKING DIAGRAM

OSC

COMP

1575

ALYW

GND

GATE(L)

GATE(H)

= Assembly Location

= Wafer Lot

= Year

= Work Week

ORDERING INFORMATION

Device

NCP1575D

NCP1575DR2

Package

SO-8

Shipping

98 Units/Rail

2500 Tape & Reel

漏

Semiconductor Components Industries, LLC, 2003

January, 2003 - Rev. 5

Publication Order Number

NCP1575/D

型號

版本

描述

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