4

FN6391.1

March 11, 2008

DEVICE START-UP CHARACTERISTICS

Device Enable Time

Time from assertion of the ENx pin to when the output voltage

reaches 95% of the VO(nom)

250

500

µs

LDO Soft-Start Ramp Rate

Slope of linear portion of LDO output voltage ramp during start-up

30

60

µs/V

EN1, EN2 PIN CHARACTERISTICS

Input Low Voltage

-0.3

0.5

V

Input High Voltage

1.4

0.3

V

Input Leakage Current

0.1

µA

Pin Capacitance

Informative

5

pF

POR1, POR2 PIN CHARACTERISTICS

POR1, POR2 Thresholds

As a percentage of nominal output voltage

91

94

97

%

87

90

93

%

POR1 Delay

1.0

2.0

3.0

ms

25

µs

POR2 Delay

100

200

300

ms

25

µs

POR1, POR2 Pin Output Low

Voltage

0.2

V

POR1, POR2 Pin Internal

Pull-Up Resistance

78

100

180

k

Ω

NOTES:

6. Limits established by characterization and are not production tested.

7. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V.

8. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.

Electrical Specifications

Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature

range of the device as follows:

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

(Note 8) TYP

MAX

(Note 8)

UNITS

ISL9000A