IR3846 Ver la hoja de datos (PDF) - International Rectifier

Número de pieza

componentes Descripción

Fabricante

IR3846

Single-Input Voltage, Synchronous Buck Regulator 35A Highly Integrated SupIRBuck®

International Rectifier 

IR3846

ELECTRICAL SPECIFICATIONS

RECOMMENDED OPERATING CONDITIONS

SYMBOL

DEFINITION

MIN

PVin

Input Bus Voltage *

1.5

Vin

Supply Voltage

5.0

VCC

Supply Voltage **

4.5

Boot to SW

Supply Voltage

4.5

VO

Output Voltage

0.6

IO

Output Current

0

Fs

Switching Frequency

300

TJ

Junction Temperature

-40

* SW node must not exceed 25V

** When VCC is connected to an externally regulated supply, also connect Vin.

MAX

21

21

7.5

7.5

0.86 PVin

±35

1500

125

UNIT

V

A

kHz

°C

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, these specification apply over, 1.5V < PVin < 21V, 4.5V< VCC < 7.5V, 0oC < TJ <

125oC.

Typical values are specified at TA = 25oC.

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNIT

Power Loss

Power Loss

MOSFET Rds(on)

Top Switch

Bottom Switch

PLOSS

Rds(on)_Top

Rds(on)_Bot

Vin = PVin = 12V, VO =

1.2V, IO = 35A, Fs =

600kHz, L=0.250uH,

TA = 25°C, Note 4

VBoot – VSW = 6.8V,

ID = 35A, Without Cu

Clip, Tj = 25°C

VCC =6.8V, ID = 35A,

With Cu Clip,

Tj = 25°C

5.3

W

3.1

4

mΩ

1.27 1.64

Reference Voltage

Feedback Voltage

Accuracy

VFB

0.6

V

Vref=0.6V,

0°C < Tj < 105°C

-0.5

Vref=0.6V,

-40°C < Tj < 125°C

-1.0

+0.5

%

+1.0

Sink Current

Source Current

Isink_Vref

Isrc_Vref

Vref=0.7V

Vref=0.5V

12.7 16.0 19.3

µA

12.7 16.0 19.3

Vref Comparator Threshold

Vref_disable

Vref Pin connected

externally

Vref_enable

0.4

0.15

V

V

6 www.irf.com © 2013 International Rectifier

April 29, 2013

Share Link: