LR8845 datasheet(3/4 Pages) UTC

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LR8845

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 4

www.unisonic.com.tw

QW-R502-750.a

ABSOLUTE MAXIMUM RATING (TA=25°С)

PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage

VIN

Power Dissipation

Internally limited

Junction Temperature

+150

°С

Operation Temperature

TOPR

-40 ~ +85

°С

Storage Temperature

TSTG

-65 ~ +150

°С

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

TO-223

θJA

165

°С/W

TO-252

108

TO-263

ELECTRICAL CHARACTERISTICS

(VIN = VOUT + 1V whichever is greater, CIN =0.1µF, COUT =2.2µF (Ceramic), TA= 25°C, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Voltage

VIN

Note1

Output Voltage Accuracy

VOUT

TA＝25°С , IOUT= 1mA ~3A

-2

TA＝0~85°С, IOUT= 1mA~3A

-3

Maximum Output Current

IOUT

Short-Circuit Current Limit

ILIMIT

VOUT>1.2V

4.5

Short-Circuit Current

ISC

VOUT<0.4V

1.7

Ground Pin Current

IGND

IOUT = 0mA

300

400

µA

IOUT= 1mA to 3A

300

Dropout Voltage (Note 2)

IOUT=3A

1.5V<=VOUT<=1.8V

1000

1.8V<VOUT<2.5V

700

2.5<=VOUT

300

450

Line Regulation

OUT

ΔV

VIN=VOUT+VD~6V

0.1

0.2

%/V

Load Regulation

ΔVOUT

VIN=VOUT+1V, IOUT=10mA~3A

0.2

Output Voltage Noise

f=10Hz to100kHz, COUT=2.2μF

µVRMS

Shutdown Supply Current

IOFF

SHDN =GND

µA

Power Supply Rejection

PSRR

IOUT=100mA

COUT=10μF

f=100Hz

f=1kHz

Shutdown Threshold

VIH

VIL

0.4

Thermal Shutdown Temperature

TSHDN

150

°С

Thermal Shutdown Hysteresis

DTSHDN

Notes: 1. VIN(MIN)= VOUT+ VDROPOUT

2. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) × 98%

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