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ELMOS Semiconductor AG

Data Sheet

QM-No.: 25DS0064E.01

PRELIMINARY INFORMATION - MAY 29, 2012

This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.

LOW QUIESCENT CURRENT STEP DOWN CONVERTER FAMILY

Electrical Characteristics (continued)

(V

Positive currents flow into the device pins.)

Description

Condition

Symbol

Min

Typ

Max

Unit

Switching

Switching frequency

f

S

0

1.75

MHz

Minimum LXT on time

I

t

260

ns

I

t

100

ns

Minimum LXT off time

PGOOD = '1'

t

520

ns

I

V

t

1330

ns

I

V

t

2450

ns

Power Good Detector

Power good detection threshold,

rising edge

V

V

OUT(NOM)

92.5

%

Power good detection threshold,

falling edge

V

V

OUT(NOM)

90

%

Output voltage at pin PGOOD

V

I

V

PGOOD

0.2

0.4

V

Leakage at pin PGOOD

V

V

I

PGOOD,lk

3

µA

IDLE Detector

IDLE detection delay

no switching

T

IDLE

70

110

150

µs

Average LXT duty cycle for IDLE

Discontinuous

operation

D

IDLE

1.38

%

Wake-up threshold during IDLE

relative to nominal

V

V

SENSE,WU

95

%

Wake-up delay after IDLE

V

T

DEL,ACTIVE

10

25

µs