L5109

Advance

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 4

www.unisonic.com.tw

QW-R125-038.a



ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATINGS

UNIT

Input Voltage

20

V

SW Voltage

38

V

FB Voltage

20

V

CTRL Voltage

20

V

Operating Junction Temperature

+150

°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.



THERMAL DATA

PARAMETER

SYMBOL

RATINGS

UNIT

Junction to Ambient

265

°С/W

Junction to Case

60

°С/W



RECOMMENDED OPERATING CONDITIONS

PARAMETER

SYMBOL

RATINGS

UNIT

Operating Temperature Range

-40 ~ 85

°C

Input Voltage

2.5 ~ 16

V

CTRL Voltage

16

V



PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Minimum Operating Voltage

2.5

16

V

Feedback Voltage

188

200

212

mV

FB Pin Bias Current

35

100

nA

Supply Current

2.5

3.2

mA

Shutdown Quiescent Current

2.0

3.2

5.0

µA

Switching Frequency

f

1.2

MHz

Maximum Duty Cycle

90

93

%

550

Switch Current Limit

550

mA

Switch VCE Saturation Voltage

360

mV

Switch Leakage Current

0.01

5

µA

High

1.8

CTRL Pin Voltage

Low

0.05

V

40

55

72

50

CTRL Pin Bias Current

75

µA

OVP Voltage

29

V

Schottky Forward Drop

0.7

V

0.1

4

Schottky Leakage Current

150

µA

Soft Start Time

t

300

µS