UD24121

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 5

www.unisonic.com.tw

QW-R115-011.b



PARAMETER

SYMBOL

RATINGS

UNIT

26

V

SW Pin Voltage

27

V

BOOST Trap Voltage

V

All Other Pins Voltage

-0.3V ~ + 6V

V

Power Dissipation

568

mW

Junction Temperature Range

+150

°C

Storage Temperature Range

-65 ~ +150

°C

Notes: 1. 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

4.5 ~ 24

V

Output Voltage

0.81 ~ 15

V

Ambient Temperature

-40 ~ +125

°C

input current into the EN pin

300

μA

Note: The device is not guaranteed to function outside of its operating conditions.



THERMAL CHARACTERISTICS

PARAMETER

SYMBOL

RATINGS

UNIT

Junction To Ambient

220

°C/W

Junction to Case

110

°C/W



ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Quiescent Current

0.8

mA

Shutdown Current

1

3

µA

Switch-On Resistance (Note 6)

0.35

Ω

Switch Leakage Current

10

uA

Current Limit (Note 6)

1.8

A

Oscillation frequency

1.4

MHz

Fold-Back Frequency

460

KHz

Max Duty Cycle

87

%

Minimum On Time (Note 6)

100

nS

Feedback Voltage

0.790

0.810

0.830

mV

EN Input High Voltage

1.2

V

EN Input Low Voltage

0.4

mV

2.1

EN input current

0.1

uA

2.8

V

150

mV

Thermal Shutdown (Note 6)

150

°C

Thermal Hysteresis (Note 6)

25

°C

Note: Guaranteed by design.