L78M datasheet(21/47 Pages) STMICROELECTRONICS

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L78M

Electrical characteristics

DocID2146 Rev 21

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Refer to the test circuits, VI = 33 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to

125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified.

Table 17: Electrical characteristics of L78M24A

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Output voltage

TJ = 25 °C

23.5

24.5

Output voltage

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

∆VO

Line regulation

VI = 27 to 38 V, IO = 200 mA, TJ = 25 °C

100

VI = 28 to 38 V, IO = 200 mA, TJ = 25 °C

∆VO

Load regulation

IO = 5 to 500 mA, TJ = 25 °C

480

IO = 5 to 200 mA, TJ = 25 °C

240

Quiescent current

TJ = 25 °C

∆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

-1.2

mV/°C

SVR

Supply voltage rejection

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

TJ = 25 °C

Output noise voltage

B =10 Hz to 100 kHz, TJ = 25 °C

170

µV

Dropout voltage

TJ = 25 °C

Isc

Short circuit current

VI = 35 V, TJ = 25 °C

240

Iscp

Short circuit peak current

TJ = 25 °C

700

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