UD38252

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 7

www.unisonic.com.tw

QW-R115-008.A



PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage

-0.3 ~ +42

V

Switch Node Voltage

V

Boost Voltage

V

All Other Pins Voltage

-0.3 ~ +6

V

Lead Temperature

260

°C

Junction Temperature

150

°C

Storage Temperature

-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

8 ~ 38

V

Output Voltage

V

Ambient Temperature

-40 ~ +85

°C



THERMAL CHARACTERISTICS

PARAMETER

SYMBOL

RATINGS

UNIT

Junction To Ambient

40

°C/W

Junction to Case

15

°C/W

pad.



PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP MAX UNIT

Input Voltage Range

8

38

V

Quiescent Current

1

1.5

mA

Feedback Voltage

0.98

1.00

1.02

V

Feedback Overvoltage Threshold

1.1X

High-Side Switch On Resistance (Note)

150

mΩ

Low-Side Switch On Resistance (Note)

140

mΩ

High-Side Switch Leakage Current

10

μA

Upper Switch Current Limit

Minimum Duty Cycle

2.9

3.5

A

Lower Switch Current Limit

From Drain to Source

0.9

A

Oscillation Frequency

160

KHz

Short Circuit Oscillation Frequency

60

KHz

Maximum Duty Cycle

90

%

Minimum On Time (Note1)

220

ns

Sense Voltage

△

114

120

126

mV

Input voltage rising

40

V

Input voltage falling

5

V

Input Under Voltage Lockout Threshold

UVLO

6.5

7.0

7.5

V

Input Under Voltage Lockout Threshold

Hysteresis

UVLO-Hys

800

mV

Soft-Start Period

3

ms

Thermal Shutdown

150

°C

Thermal Shutdown Hysterisis

30

°C

Note: Guaranteed by design.