LOW-NOISE, LOW-DROPOUT, LINEAR REGULATORS

ACT8740

Rev PrB, 25-Feb-08

- 28 -

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Copyright © 2008 Active-Semi, Inc.

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I

ELECTRICAL CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INL Operating Voltage Range

3.1

5.5

V

INL UVLO Threshold

2.9

3

3.1

V

UVLO Hysteresis

0.1

V

Output Voltage Accuracy

-1.2

+2

%

-2.5

+3

Line Regulation Error

0

mV

Load Regulation Error

-0.004

%/mA

Power Supply Rejection Ratio

70

dB

60

Supply Current per Output

Regulator Enabled

40

µA

Regulator Disabled

0

Dropout Voltage

100

200

mV

Output Current

250

mA

Current Limit

280

mA

Internal Soft-Start

100

µs

Power Good Flag High Threshold

89

%

Output Noise

40

1

20

µF

Discharge Resistor in Shutdown

LDO Disabled, DIS5[ ] = [1]

650

Ω

: Dropout Voltage is defined as the differential voltage between input and output when the output voltage drops 100mV below the

regulation voltage at 1V differential voltage.

: LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage. Un-

der heavy overload conditions the output current limit folds back by 30% (typ)