78LXXM

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 8

www.unisonic.com.tw

QW-R101-002.P



ELECTRICAL CHARACTERISTICS (Cont.)

For UTC78L18M (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≦33V,IOUT=1mA ~ 40mA

17.10

18.90

V

≦

21V VIN≦VMAX,

IOUT=1mA - 200mA

17.10

18.90

V

(Note 2)

Load Regulation

VOUT

TJ=25°C,IOUT=1mA ~ 100mA

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 VIN≦40mA

0.1

mA

Output Noise Voltage

eN

≦≦

10Hz f 100kHz

150

μV

Temperature Coefficient of VOUT

VO/T IOUT=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 UTC78L24M (VIN=33V, IOUT=40mA)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output Voltage

VOUT

TJ=25°C

23.04

24

24.96

V

≦

27V VIN≦35V,IOUT=1mA ~ 40mA

22.80

25.20

V

≦

27V VIN≦VMAX,

IOUT=1mA - 200mA

22.80

25.20

V

(Note 2)

Load Regulation

VOUT

TJ=25°C, IOUT=1mA ~ 100mA

40

200

mV

TJ=25°C, IOUT=1mA ~ 40mA

20

100

mV

Line Regulation

VOUT

≦

27V VIN≦35V,TJ=25°C

60

300

mV

≦

28V VIN≦35V,TJ=25°C

50

250

mV

Quiescent Current

IQ

3.0

7.5

mA

Quiescent Current Change

IQ

≦

27V VIN≦35V

1.5

mA

≦

1mA VIN≦40mA

0.1

mA

Output Noise Voltage

eN

≦≦

10Hz f 100kHz

200

μV

Temperature Coefficient of VOUT

VO/T IOUT=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

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 represent pulse test conditions with junction

temperatures specified at the initiation of test.

2. Power dissipation<0.5W