L79(2014) 查看數據表（PDF） - STMicroelectronics

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L79
(Rev.:2014)

Negative voltage regulators

STMicroelectronics 

L79

5

Electrical characteristics

Electrical characteristics

Refer to the test circuits, TJ = 0 to 125 °C, VI = -10 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF

unless otherwise specified.

Symbol

Table 4. Electrical characteristics of L7905AC

Parameter

Test conditions

Min. Typ. Max. Unit

VO Output voltage

TJ = 25°C

-4.9

-5

-5.1

V

VO Output voltage

IO = -5 mA to -1 A, PO ≤ 15 W

VI = -8 to -20 V

-4.8

-5

-5.2

V

ΔVO(1) Line regulation

VI = -7 to -25 V, TJ = 25°C

VI = -8 to -12 V, TJ = 25°C

100

mV

50

ΔVO(1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25°C

IO = 250 to 750 mA, TJ = 25°C

100

mV

50

Id

Quiescent current

TJ = 25°C

3

mA

ΔId

IO = 5 mA to 1 A

Quiescent current change

VI = -8 to -25 V

0.5

mA

1.3

ΔVO/ΔT Output voltage drift

IO = 5 mA

-0.4

mV/°C

eN Output noise voltage

B = 10 Hz to 100 kHz, TJ = 25°C

100

µV

SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz

54

60

dB

Vd Dropout voltage

IO = 1 A, TJ = 25°C, ΔVO = 100 mV

1.4

V

Isc Short circuit current

2.1

A

Iscp Short circuit peak current TJ = 25°C

2.5

A

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.

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