L1923

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

4 of 7

www.unisonic.com.tw

QW-R502-440.c

ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

UNIT

-0.3~7

V

Output Short-Circuit Duration

Infinite

SET to GND

-0.3~7

V

SHDN to GND

-0.3~7

V

SHDN to IN

-7~0.3

V

OUT to GND

V

520

mW

Junction Temperature

150

°C

Operating Temperature

-40~85

°C

Storage Temperature

-65~160

°C

Notes: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA

PARAMETER

SYMBOL

RATINGS

UNIT

Junction to Ambient

240

°C/W

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Voltage (Note 2)

2.5

5.5

V

Output Voltage Accuracy

-2

2

%

Adjustable Output Voltage

(Note 3)

5.5

V

Maximum Output Current

500

mA

Current Limit (Note 4)

600

800

mA

Short Circuit Current

Isc

120

mA

Ground Pin Current

90

120

µA

Dropout Voltage (Note 5)

200

mV

400

500

Line Regulation

0.06

0.12

%/V

Load Regulation

0.02

0.1

%/mA

Ripple Rejection

65

dB

Output Noise

Noise

136

µV

(RMS)

238

253

SHUTDOWN

SHDN Input Threshold

Regulator enabled

1.5

V

Regulator shutdown

0.4

SHDN Input Bias Current

0.003

0.1

µA

Shutdown Supply Current

0.2

1

µA

SET INPUT

SET Reference Voltage (Note 3)

1.225

1.25

1.275

V

1.25

SET Input Leakage Current

5

30

nA

THERMAL PROTECTION

145

°C

Thermal Shutdown Hysteresis

25

°C

junction temperature as close to ambient as possible.

2.Guaranteed by line regulation test.

3.Adjustable mode only.

4.Not tested. For design purposes, the current limit should be considered 600mA minimum to 800mA

maximum.