Datasheet > IRU3034CW

IRU3034CW

更新时间： 2024-11-28 20:08:59

品牌	Logo	应用领域
英飞凌 - INFINEON		光电二极管
页数	文件大小	规格书
12页	74K
描述
Switching Regulator/Controller, Voltage-mode, PDSO8,

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IRU3034CW 数据手册

Data Sheet No. PD94148

IRU3034

8-PIN PWM SWITCHER CONTROLLER IC

WITH CURRENT LIMITING

FEATURES

DESCRIPTION

The IRU3034 IC provides a low cost switching controller

8-Pin SOIC switching controller with

HICCUP current limiting reduces diode power

dissipation to less than 1% of normal operation

Soft-Start capacitor allows for smooth output

voltage ramp up

with true short circuit protection all in a compact 8-pin

surface mount package, providing a low cost switching

solution for dual supply processor applications that re-

quire switching regulator for the 3.3V supply such as

the applications with AGP on-board. Typically in these

applications, a dual supply regulator converts 5V to 3.3V

for I/O supply and a jumper programmable supply of

1.25V to 3.5V for Core supply. The IC uses an internal

regulator generated from the 12V supply to power the

controller as well as the 12V supply to drive the power

MOSFET, allowing a low cost N-channel MOSFET to be

used. The IC also includes an error comparator for fast

transient response, a precise voltage reference for set-

ting the output voltage as well as a direct drive of the

MOSFET for the minimum part count.

On-Board MOSFET Driver

Fastest transient response of any controller

method. (0 to 100% Duty Cycle in 100ns)

1% Internal Voltage Reference

Internal Under-Voltage Lockout protects MOSFET

during start-up

APPLICATIONS

Dual supply low voltage processor applications,

such as: P55Cä , CYRIX M2ä , POWER PCä and

AMD K6ä

Simple 5V to 3.3V switcher for Pentium with AGP

or Pentium IIä applications

TYPICAL APPLICATION

SS CS+ CS-

IRU3034

Drv

Gnd

V12

VFB

VHYST

12V

VOUT

Figure 1 - Typical application of IRU3034.

Notes:P55C, Pentium II are trademarks of Intel Corp. K5 & K6 are trademarks of AMD corp. Cyrix 6X86L, M1, M2 are trademarks of Cyrix

Corp. Power PC is trademark of IBM Corp.

PACKAGE ORDER INFORMATION

TA (°C)

8-PIN PLASTIC SOIC (S)

0 To 70

IRU3034CS

Rev. 2.1

07/17/02

www.irf.com

12 3 4 5 6 7...12

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