3

ZXLB1600

°°°C

Symbol Parameter

Conditions

Min Typ Max Units

Output Voltage control by dc voltage applied to ‘ADJ’ pin

Internal reference voltage

1.23

V

External overdrive voltage range

on ‘ADJ’ pin for output voltage

control

0.5

(NOM)

V

Input current

-10

µA

Output voltage

27

29

V

Output Voltage control by PWM signal applied to ‘EN’ input

∆T/T

PWM duty cycle range at ‘EN’

input

40

100

%

Internal low pass filter cut-off

frequency

4kHz

Filter attenuation

F=30kHz

52.5

dB

Enable input

Low level Input voltage

Device in shutdown

0.4

V

High level Input voltage

Device active

1.4

Vin

V

Low level input current

-100

nA

High level input current

100

nA

Battery low comparator

Quiescent current

3

µA

Detection threshold

2

V

Threshold tolerance

+/-2

%

Hysteresis

20

mV

Threshold voltage on LBT pin

LBT floating

1.21

V

Maximum voltage on LBT pin

during normal device operation

Vin-

0.5

V

Low level output current

Output ‘on’

1

mA

Low level output voltage

0.4

V

High level output current

Output ‘off’

2

µA

High level output voltage

Output ‘off’

29

V

DRAFT ISSUE J January 2002

ZXLB1600