78TXXA

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

7 of 9

www.unisonic.com.tw

QW-R101-011.L

ELECTRICAL CHARACTERISTICS(Cont.)

FOR 78T18A

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output Voltage

17.28

18.0

18.72

V

≦

17.10

18.90

V

Load Regulation

180

mV

90

mV

Line regulation

180

mV

180

mV

Quiescent Current

≦

8.0

mA

Quiescent Current Change

1.0

mA

0.5

mA

Output Noise Voltage

eN

10Hz f 100kHz

≦≦

110

μV

Temperature coefficient of Vo

ΔVo/ΔT

-2.2

mV/

°C

Ripple Rejection

RR

53

69

dB

Peak Output Current

1.8

A

Short-Circuit Current

250

mA

Dropout Voltage

2.0

V

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.