L7818CD2T-TR1 查看數據表（PDF） - STMicroelectronics

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L7818CD2T-TR1

Positive voltage regulators

STMicroelectronics 

Electrical characteristics

L78xx - L78xxC

Table 9.

Symbol

Electrical characteristics of L7818 (refer to the test circuits, TJ = -55 to 150°C, VI = 26 V,

IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Parameter

Test conditions

Min. Typ. Max. Unit

VO Output voltage

TJ = 25°C

17.3 18 18.7 V

VO Output voltage

IO = 5 mA to 1 A, PO ≤15 W

VI = 22 to 33 V

17.1 18 18.9 V

ΔVO(1) Line regulation

VI = 21 to 33 V, TJ = 25°C

VI = 24 to 30 V, TJ = 25°C

180

mV

90

ΔVO(1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25°C

IO = 250 to 750 mA, TJ = 25°C

180

mV

90

Id

Quiescent current

TJ = 25°C

6

mA

ΔId

IO = 5 mA to 1 A

Quiescent current change

VI = 22 to 33 V

0.5

mA

0.8

ΔVO/ΔT Output voltage drift

IO = 5 mA

2.3

mV/°C

eN Output noise voltage

B =10 Hz to 100 KHz, TJ = 25°C

40 µV/VO

SVR Supply voltage rejection VI = 22 to 32 V, f = 120 Hz

59

dB

Vd Dropout voltage

IO = 1 A, TJ = 25°C

2

2.5

V

RO Output resistance

f = 1 KHz

22

mΩ

Isc Short circuit current

VI = 35 V, TJ = 25°C

0.75 1.2

A

Iscp Short circuit peak current TJ = 25°C

1.3 2.2 3.3

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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