L7905C datasheet(9/24 Pages) STMICROELECTRONICS

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L7900 series

Electrical characteristics

9/24

Table 8.

Electrical characteristics of L7918C (refer to the test circuits, TJ = 0 to 125°C, VI = -27V,

IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Output voltage

TJ = 25°C

-17.3

-18

-18.7

Output voltage

IO = -5 mA to -1 A, PO ≤15 W

VI = -22 to -33 V

-17.1

-18

-18.9

∆VO(1)

Line regulation

VI = -21 to -33 V, TJ = 25°C

360

VI = -24 to -30 V, TJ = 25°C

180

∆VO(1)

Load regulation

IO = 5 mA to 1.5 A, TJ = 25°C

360

IO = 250 to 750 mA, TJ = 25°C

180

Quiescent current

TJ = 25°C

∆Id

Quiescent current change

IO = 5 mA to 1 A

0.5

VI = -22 to -33 V

∆VO/∆T Output voltage drift

IO = 5 mA

-1

mV/°C

Output noise voltage

B = 10Hz to 100KHz, TJ = 25°C

300

µV

SVR

Supply voltage rejection

∆VI = 10 V, f = 120Hz

Dropout voltage

IO = 1 A, TJ = 25°C, ∆VO = 100 mV

1.1

Isc

Short circuit current

1.1

Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Table 9.

Electrical characteristics of L7920C (refer to the test circuits, TJ = 0 to 125°C, VI = -29V,

IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Output voltage

TJ = 25°C

-19.2

-20

-20.8

Output voltage

IO = -5 mA to -1 A, PO ≤15 W

VI = -24 to -35 V

-19

-20

-21

∆VO(1)

Line regulation

VI = -23 to -35 V, TJ = 25°C

400

VI = -26 to -32 V, TJ = 25°C

200

∆VO(1)

Load regulation

IO = 5 mA to 1.5 A, TJ = 25°C

400

IO = 250 to 750 mA, TJ = 25°C

200

Quiescent current

TJ = 25°C

∆Id

Quiescent current change

IO = 5 mA to 1 A

0.5

VI = -24 to -35 V

∆VO/∆T Output voltage drift

IO = 5 mA

-1.1

mV/°C

Output noise voltage

B = 10Hz to 100KHz, TJ = 25°C

350

µV

SVR

Supply voltage rejection

∆VI = 10 V, f = 120Hz

Dropout voltage

IO = 1 A, TJ = 25°C, ∆VO = 100 mV

1.1

Isc

Short circuit current

0.9

Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

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