78NXX

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 9

www.unisonic.com.tw

QW-R101-033.N



ELECTRICAL CHARACTERISTICS (Cont.)

For 78N18 (VIN=27V, IOUT=40mA)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output Voltage

VOUT

TJ=25°C

17.28

18

18.72

V

21V≦VIN≦VMAX,

IOUT=1mA ~ 300mA (Note 2)

17.10

18.90

V

Load Regulation

VOUT

TJ=25°C, IOUT=1mA ~ 300mA

30

180

mV

TJ=25°C, IOUT=1mA ~ 40mA

20

90

mV

Line Regulation

VOUT

21V≦VIN≦33V, TJ=25°C

45

300

mV

22V≦VIN≦33V, TJ=25°C

35

250

mV

Quiescent Current

IQ

2.2

6.5

mA

Quiescent Current Change

IQ

21V≦VIN≦33V

1.5

mA

1mA≦IOUT≦40mA

0.1

mA

Output Noise Voltage

eN

10Hz≦f≦100kHz

150

uV

Temperature Coefficient of VOUT

VO/TIOUT=5mA

1.8

mV/°C

Ripple Rejection

RR

23V≦VIN≦28.5V, f=120Hz,TJ=25°C

45

dB

Dropout Voltage

VD

TJ=25°C

1.7

V

For 78N24 (VIN=33V, IOUT=40mA)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output Voltage

VOUT

TJ=25°C

23.04 24.00 24.96

V

27V≦VIN≦VMAX,

IOUT=1mA ~ 300mA (Note 2)

22.80

25.20

V

Load Regulation

VOUT

TJ=25°C, IOUT=1mA ~ 300mA

30

200

mV

TJ=25°C, IOUT=1mA ~ 40mA

20

100

mV

Line Regulation

VOUT

27V≦VIN≦35V, TJ=25°C

160

300

mV

28V≦VIN≦35V, TJ=25°C

150

250

mV

Quiescent Current

IQ

3.0

7.5

mA

Quiescent Current Change

IQ

27V≦VIN≦35V

1.5

mA

1mA≦IOUT≦40mA

0.1

mA

Output Noise Voltage

eN

10Hz≦f≦100kHz

200

uV

Temperature Coefficient of VOUT

VO/TIOUT=5mA

2.0

mV/°C

Ripple Rejection

RR

27V≦VIN≦35V, f=120Hz,TJ=25°C

45

dB

Dropout Voltage

VD

TJ=25°C

1.7

V

Notes: 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 represent pulse test conditions with junction

temperatures specified at the initiation of test.

2. Power dissipation<0.5W