IFX91041 datasheet(9/17 Pages) INFINEON

Part #	IFX91041

Description	1.8A DC/DC Step-Down Voltage Regulator 5.0V, 3.3V or Adjustable Output Voltage

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Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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9 / 17 page

IFX91041

Buck Regulator

Data Sheet

9

Rev. 1.01, 2009-10-19

5.2.19

Charge pump switch-off threshold

V

BDS -

V

BUO

––

5

V

(

V

BDS - VBUO) increasing

5.2.20

Maximum duty cycle

D

max

––

100

%

3)

5.2.21

Soft start ramp

t

start

350

500

750

µs

V

FB rising from 5% to

95% of

V

FB,nom

5.2.22

Input under voltage shutdown

threshold

V

S,off

3.75

–

V

S decreasing

5.2.23

Input voltage startup threshold

V

S,on

–

4.75

V

S increasing

5.2.24

Input under voltage shutdown

hysteresis

V

S,hyst

150

–

mV

–

1) Not subject to production test, application related parameter

2) Not subject to production test; specified by design.

3) Consider “Chapter 4.2, Functional Range”

Electrical Characteristics: Buck Regulator

V

S = 6.0 V to 40 V, Tj = -40 °C to +125 °C, all voltages with respect to ground (unless otherwise specified)

Pos.

Parameter

Symbol

Limit Values

Unit Conditions

Min.

Typ.

Max.

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