78TXXAL-TQ2-R datasheet(7/9 Pages) UTC

7 / 9 page

78TXXA

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

7 of 9

www.unisonic.com.tw

QW-R101-011.L

ELECTRICAL CHARACTERISTICS(Cont.)

FOR 78T18A

(VIN=27V, IOUT=0.5A)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output Voltage

VOUT

TJ=25°C, IOUT=5mA-1.0A

17.28

18.0

18.72

VIN=21V~33V, IOUT=5mA-1.0A, PD 15W

≦

17.10

18.90

Load Regulation

ΔVOUT

TJ=25°C, IOUT=5mA-1.0A

180

TJ=25°C, IOUT=0.25A-0.75A

Line regulation

ΔVOUT

VIN=21V~33V, TJ=25°C

180

VIN=21V~33V, TJ=25°C, IOUT=1.0A

180

Quiescent Current

TJ=25°C, IOUT 1.0A

≦

8.0

Quiescent Current Change

ΔIQ

VIN=21.5V~33V

1.0

IOUT=5mA-1.0A

0.5

Output Noise Voltage

10Hz f 100kHz

≦≦

110

μV

Temperature coefficient of Vo

ΔVo/ΔT

IOUT=5mA

-2.2

mV/

°C

Ripple Rejection

VIN=22V-32V, f=120Hz, TJ=25°C

Peak Output Current

IPEAK

TJ=25°C

1.8

Short-Circuit Current

ISC

VIN=35V, TJ=25°C

250

Dropout Voltage

TJ=25°C

2.0

Note 1: The Maximum steady state usable output current are dependent on input voltage, heat sinking, lead length

of the package and copper pattern of PCB. The data above represents pulse test conditions with junction

temperatures specified at the initiation of test.

Note 2: Power dissipation<0.5W

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