4

FN9228.0

April 11, 2006

1.20

1.21

1.22

V

1.19

1.21

1.23

V

FB Input Bias Current

250

500

nA

Switch On Resistance

150

300

m

Ω

EFF

Peak Efficiency

92

%

Switch Current Limit

2.1

2.6

3.1

A

Max Duty Cycle

85

90

%

Oscillator Frequency

FREQ = 0V

550

650

800

KHz

1.0

1.2

1.4

MHz

Soft-Start Slew Current

2.75

µA

LDO REGULATOR

ADJ = LDO_OUT

3.0

5.5

V

ADJ OPEN

3.35

5.5

V

ADJ = 0V

3.8

5.5

V

Output Voltage

ADJ = GND, ILDO = 1mA

3.31

V

ADJ = GND, ILDO = 350mA

3.29

V

ADJ OPEN, ILDO = 1mA

2.86

V

ADJ OPEN, ILDO = 350mA

2.84

V

ADJ = LDO_OUT, ILDO = 1mA

2.51

V

ADJ = LDO_OUT, ILDO = 350mA

2.49

V

Overall Accuracy

1mA < ILDO < 350mA

-4

4

%

Line Regulation

2

mV/V

Load Regulation

1mA < ILDO < 350mA

0.75

%

Dropout Voltage

Output drops by 2%, ILDO = 350mA

300

500

mV

Current Limit

Output drops by 2%

350

400

mA

VCOM AMPLIFIER RLOAD = 10K, CLOAD = 10pF, Unless Otherwise Stated

Supply Voltage

4.5

20

V

Supply Current

3mA

Offset Voltage

320

mV

Noninverting Input Bias Current

0

100

nA

CMIR

Common Mode Input Voltage

Range

0VDD2

V

CMRR

Common-Mode Rejection Ratio

50

70

dB

PSRR

Power Supply Rejection Ratio

70

85

dB

VOH

Output Voltage Swing High

Iout(source) = 5mA

VDD2-50

mV

VOH

Output Voltage Swing High

Iout(source) = 50mA

VDD2-450

mV

VOL

Output Voltage Swing Low

Iout(sink) = 5mA

50

mV

VOL

Output Voltage Swing Low

Iout(sink) = 50mA

450

mV

Electrical Specifications

Unless Otherwise Noted. (Continued)

SYMBOL

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

ISL97644