Datasheet > VJ0805Y332KXXA

VJ0805Y332KXXA

更新时间： 2024-09-25 08:20:19

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器时钟
页数	文件大小	规格书
23页	1006K
描述
Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization

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VJ0805Y332KXXA 数据手册

March 2006

LM2747

Synchronous Buck Controller with Pre-bias Startup, and

Optional Clock Synchronization

General Description

Features

1% feedback voltage accuracy over temperature

The LM2747 is a high-speed synchronous buck regulator

controller with a feedback voltage accuracy of 1%. It can

provide simple down conversion to output voltages as low as

0.6V. Though the control section of the IC is rated for 3 to 6V,

the driver section is designed to accept input supply rails as

high as 14V. The use of adaptive non-overlapping MOSFET

gate drivers helps avoid potential shoot-through problems

while maintaining high efficiency. The IC is designed for the

more cost-effective option of driving only N-channel MOS-

FETs in both the high-side and low-side positions. It senses

the low-side switch voltage drop for providing a simple,

adjustable current limit.

n Switching frequency from 50 kHz to 1 MHz

n Switching frequency synchronize range 250 kHz to 1

MHz

n Startup with a pre-biased output load

n Power stage input voltage from 1V to 14V

n Control stage input voltage from 3V to 6V

n Output voltage adjustable down to 0.6V

n Power Good flag and shutdown

n Output overvoltage and undervoltage detection

n Low-side adjustable current sensing

n Adjustable soft-start

The LM2747 features a fixed-frequency voltage-mode PWM

control architecture which is adjustable from 50 kHz to 1

MHz with one external resistor. In addition, the LM2747 also

allows the switching frequency to be synchronized to an

external clock signal over the range of 250 kHz to 1 MHz.

This wide range of switching frequency gives the power

supply designer the flexibility to make better tradeoffs be-

tween component size, cost and efficiency.

n Tracking and sequencing with shutdown and soft start

pins

n TSSOP-14 package

Applications

n Down Conversion from 3.3V

n Cable Modem, DSL and ADSL

n Laser Jet and Ink Jet Printers

n Low Voltage Power Modules

n DSP, ASIC, Core and I/O

Features include the ability to startup with a pre-biased load

on the output, soft-start, input undervoltage lockout (UVLO)

and Power Good (based on both undervoltage and overvolt-

age detection). In addition, the shutdown pin of the IC can be

used for providing startup delay, and the soft-start pin can be

used for implementing precise tracking, for the purpose of

sequencing with respect to an external rail.

Typical Application

20150901

DS201509

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与VJ0805Y332KXXA相关器件

型号	品牌	获取价格	描述	数据表
VJ0805Y332KXXAB4X	VISHAY	获取价格	CAPACITOR, CERAMIC, MULTILAYER, 25 V, X7R, 0.0033 uF, SURFACE MOUNT, 0805, CHIP, ROHS COMP
VJ0805Y332KXXAB68	VISHAY	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 25V, 10% +Tol, 10% -Tol, X7R, -/+15ppm/Cel TC, 0.0
VJ0805Y332KXXAR5H	VISHAY	获取价格	CAPACITOR, CERAMIC, MULTILAYER, 25 V, X7R, 0.0033 uF, SURFACE MOUNT, 0805, CHIP, ROHS COMP
VJ0805Y332KXXAT4X	VISHAY	获取价格	CAPACITOR, CERAMIC, MULTILAYER, 25 V, X7R, 0.0033 uF, SURFACE MOUNT, 0805, CHIP, ROHS COMP
VJ0805Y332KXXCW1BC	VISHAY	获取价格	CAP CER 3300PF 25V X7R 0805
VJ0805Y332KXXPW1BC	VISHAY	获取价格	CAP CER 3300PF 25V X7R 0805
VJ0805Y332MBXAC	VISHAY	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 25V, 20% +Tol, 20% -Tol, X7R, 15% TC, 0.0033uF, Su
VJ0805Y332MBXAP	VISHAY	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 25V, 20% +Tol, 20% -Tol, X7R, 15% TC, 0.0033uF, Su
VJ0805Y332MBXAT4X	VISHAY	获取价格	CAPACITOR, CERAMIC, MULTILAYER, 25 V, X7R, 0.0033 uF, SURFACE MOUNT, 0805, CHIP, ROHS COMP
VJ0805Y332MBXAT5H	VISHAY	获取价格	CAPACITOR, CERAMIC, MULTILAYER, 25 V, X7R, 0.0033 uF, SURFACE MOUNT, 0805, CHIP, ROHS COMP

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