L78M00 datasheet(10/30 Pages) STMICROELECTRONICS

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Electrical characteristics

L78M00 series

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Table 11.

Electrical characteristics of L78M20C (refer to the test circuits, TJ = 25°C, VI = 29V,

IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Output voltage

19.2

20.8

Output voltage

IO = 5 to 350 mA, VI = 23 to 35 V

∆VO

Line regulation

VI = 23 to 35 V, IO = 200 mA

100

VI = 24 to 35 V, IO = 200 mA

∆VO

Load regulation

IO = 5 to 500 mA, TJ = 25°C

400

IO = 5 to 200 mA, TJ = 25°C

200

Quiescent current

∆Id

Quiescent current change

IO = 5 to 350 mA

0.5

IO = 200 mA, VI = 23 to 35 V

0.8

∆VO/∆T Output voltage drift

IO = 5 mA, TJ = 0 to 125°C

-1.1

mV/°C

SVR

Supply voltage rejection

VI = 24 to 34 V, f = 120Hz, IO = 300mA

Output noise voltage

B =10Hz to 100KHz

110

µV

Dropout voltage

Isc

Short circuit current

VI = 35 V

240

Table 12.

Electrical characteristics of L78M24C (refer to the test circuits, TJ = 25°C, VI = 23V,

IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Output voltage

IO = 5 to 350 mA, VI = 27 to 38 V

22.8

25.2

∆VO

Line regulation

VI = 27 to 38 V, IO = 200 mA

100

VI = 28 to 38 V, IO = 200 mA

∆VO

Load regulation

IO = 5 to 500 mA, TJ = 25°C

480

IO = 5 to 200 mA, TJ = 25°C

240

Quiescent current

∆Id

Quiescent current change

IO = 5 to 350 mA

0.5

IO = 200 mA, VI = 27 to 38 V

0.8

∆VO/∆T Output voltage drift

IO = 5 mA, TJ = 0 to 125°C

-1.2

mV/°C

SVR

Supply voltage rejection

VI = 28 to 38 V, f = 120Hz, IO = 300mA

Output noise voltage

B =10Hz to 100KHz

170

µV

Dropout voltage

Isc

Short circuit current

VI = 35 V

240

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