P1888

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 4

www.unisonic.com.tw

QW-R103-111.a



ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

UNIT

V

Feedback Pin Voltage

V

EN Pin Voltage

V

Switch Pin Voltage

V

Power Dissipation

Internally limited

mW

Operating Ambient Temperature

-20~+85

°C

Operating Temperature

-20~+125

°C

Storage Temperature

-40~+150

°C

Note: 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

134

°C/W

Junction to Case

22

°C/W



PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP. MAX. UNIT

Input Voltage

23

V

Feedback Voltage

1.18

1.23

1.28

V

Feedback Bias Current

0.1

µA

Switch Current

3.1

A

Standby Current

10

µA

Line Regulation

OUT

OUT

V

V

∆

1

%

Load Regulation

OUT

OUT

V

V

∆

0.2

%

Oscillation Frequency

Measure waveform at SW pin

240

300

360

KHz

Frequency of Current Limit or

Short Circuit Protect

Measure waveform at SW pin

10

KHz

Evaluate oscillation at SW pin

0.79

V

EN Pin Input Voltage

Evaluate oscillation stop at SW pin

0.72

V

20

µA

EN Pin Input Leakage Current

-10

µA

Soft-Start Time

0.3

2

5

ms

110

150

mΩ

70

100

mΩ

Efficiency

η

88

%