LD3870

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

3 of 5

www.unisonic.com.tw

QW-R102-027.I



ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)

PARAMETER

SYMBOL

RATINGS

UNIT

Input Voltage

VIN

+14

V

Control Voltage

VCONT

+14(Note 2)

V

Power Dissipation

PD

300

mW

Operating Temperature

TOPR

-40 ~ +85

°C

Storage Temperature

TSTG

-40 ~ +125

°C

Note 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.

2. When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.



ELECTRICAL CHARACTERISTICS

(VIN=VOUT+1V, CIN=0.1μF, COUT=4.7μF, Cp=0.01μF, TA=25°C)

PARAMETER

SYMBOL

TEST CONDITONS

MIN

TYP

MAX

UNIT

Output Voltage

VOUT

IOUT=30mA

-2%

+2%

V

Quiescent Current

IQ

IOUT=0mA, expect lCONT

200

300

μA

Quiescent Current

At Control OFF

IQ(OFF)

VCONT=0V

5

μA

Output Current

IOUT

VOUT-0.3V

150

200

mA

Line Regulation

△

VOUT △

/VIN VIN=VOUT+1V ~ 14V, IOUT=1mA

0.15

%/V

Load Regulation

△

VOUT △

/IOUT IOUT=0 ~ 100mA

0.03

%/mA

Dropout Voltage

VD

IOUT=60mA

0.12

0.2

V

Ripple Rejection

RR

eIN=200mVrms, f=1kHz, IOUT=10mA,

VIN=VOUT+2V, VOUT=3V Version

60

dB

Average Temperature

Coefficient of Output Voltage

△

VOUT △

/TA

TA=0~85°C, IOUT=10mA,

VOUT=3V Version

0.2

mV/°C

Output Noise Voltage

eN

f=10Hz ~ 80kHz, IOUT=10mA,

VOUT=3V Version

30

μVrms

Control Voltage

ON

VCONT(ON)

1.6

V

OFF

VCONT(OFF)

0.6

V

Note: The above specification is a common specification for all output voltages. Therefore, it may be different from

the individual specification for a specific output voltage.