LD1596

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 5

www.unisonic.com.tw

QW-R502-A36.a



ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

UNIT

Input Voltage

-0.3~45

V

FB Pin Voltage

V

EN Pin Voltage

V

SW Pin Voltage

V

Power Dissipation

Internally limited

mW

Thermal Resistance (Junction to Ambient, No

Heatsink, Free Air)

50

°C/W

Operating Junction Temperature

-40~125

°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.



THERMAL DATA

PARAMETER

SYMBOL

RATINGS

UNIT

Junction to Ambient

150

°C/W



PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

System Parameters Test Circuit Figure 1

Feedback Voltage

1.235

1.26

V

Efficiency

η

81

%



ELECTRICAL CHARACTERISTICS (DC PARAMETERS)

unless otherwise specified

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Operation Voltage

4.5

40

V

Shutdown Supply Current

80

200

uA

Quiescent Supply Current

2

5

mA

Oscillator Frequency

Fosc

127

150

172

Khz

Switch current Limit

3

A

EN Pin Threshold

High (Regulator OFF)

1.4

V

Low (Regulator ON)

0.8

V

Output Saturation Voltage

1.1

1.4

V

Constant Current Sense Voltage

0.132 0.155 0.178

V