UU28141

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 5

www.unisonic.com.tw

QW-R125-040.B



PARAMETER

SYMBOL

RATINGS

UNIT

-0.3 ~ 6

V

SW Pin Voltage

-0.3 ~ 33

V

OVP Pin Voltage

-0.3 ~ 33

V

EN, FB Pins Voltage

V

Operating Junction Temperature

-40 ~ +125

°C

Storage Temperature Range

-65 ~ +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.



RECOMMENDED OPERATING CONDITIONS

PARAMETER

SYMBOL

RATINGS

UNIT

Input Supply Voltage

2.5 ~ 5.5

V

Ambient Temperature

-40 ~ +125

°C



THERMAL CHARACTERISTICS

PARAMETER

SYMBOL

RATINGS

UNIT

Junction To Ambient

250

°C/W

Junction to Case

180

°C/W

2

(Multi-layer).



PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP MAX

UNIT

Input Voltage Range

2.5

5.5

V

Input UVLO

UVLO

Rising

2.25

2.45

V

UVLO Hysteresis

0.1

V

OVP Sense Voltage

27.5

29

V

Quiescent Current

200

400

μA

Supply Current

1

2

mA

Shutdown Current

1

4

μA

FB Pin Voltage

0.285 0.300 0.315

V

FB Pin Current

±100

nA

Load Regulation

1

%

Line Regulation

1

%

EN Pin Voltage High

1.4

V

EN Pin Voltage Low

0.4

V

EN Hysteresis

0.1

V

EN Pin Sink Current

1

μA

Switching Frequency

0.75

1

1.25

MHz

1.4

A

N-Channel MOSFET Current Limit (Note)

Duty on 50%

1.9

A

Switching Maximum Duty

92

%

Dimming Clock Rate

0.2

200

KHz

0.5

1.0

Ω

Thermal Shutdown

155

°C

Thermal Shutdown Protection Hysteresis

25

°C

Note: Guaranteed by design.