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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鈭扗C 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

2

t

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鈭抪rogrammable

with an additional resistor between R

OSC

and ground. This device

provides undervoltage lockout protection, soft鈭抯tart, and built鈭抜n

adaptive nonoverlap and is assembled in an SOIC鈭? package.

The NCP1575鈭抌ased 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

http://onsemi.com

MARKING

DIAGRAM

8

1

SOIC鈭?

D SUFFIX

CASE 751

1

1575

ALYW

A

L

Y

W

= Assembly Location

= Wafer Lot

= Year

= Work Week

鈥?/div>

Pb鈭扚ree Packages are Available

0.980 V

鹵1.0%

Reference Voltage

V

2

Control Topology

200 ns Transient Response

Programmable Soft鈭扴tart

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

Adaptive FET Nonoverlap Time

Default 200 kHz Oscillator Frequency (No External

Resistor Required)

User鈭扨rogrammable Oscillator Frequency (One External

Resistor Required)

Undervoltage Lockout

On/Off Control Through Use of the COMP Pin

Overvoltage Protection through Synchronous MOSFETs

Synchronous N鈭扖hannel Buck Design

鈥?2 V Only鈥?or Dual Supply Operation

PIN CONNECTIONS

V

CC

R

OSC

NC

COMP

1

8

GND

V

FB

GATE(L)

GATE(H)

ORDERING INFORMATION

Device

NCP1575D

NCP1575DG

NCP1575DR2

NCP1575DR2G

Package

SOIC鈭?

(Pb鈭扚ree)

SOIC鈭?

(Pb鈭扚ree)

Shipping

鈥?/div>

98 Units/Rail

2500 Tape & Reel

鈥燜or information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

漏

Semiconductor Components Industries, LLC, 2004

1

November, 2004 鈭?Rev. 6

Publication Order Number

NCP1575/D

標(biāo)準(zhǔn)包裝
98
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 切換控制器
系列
-
PWM 型
電流/電壓模式，V²?
輸出數(shù)
1
頻率 - 最大
320kHz
占空比
-
電源電壓
9 V ~ 20 V
降壓
是
升壓
無
回掃
無
反相
無
倍增器
無
除法器
無
Cuk
無
隔離
無
工作溫度
0°C ~ 125°C
封裝/外殼
8-SOIC（0.154"，3.90mm 寬）
包裝
管件

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