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L78 数据表(PDF) 13 Page - STMicroelectronics

部件名 L78
功能描述  Thermal overload protection
PDF  54 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L78 数据表(HTML) 13 Page - STMicroelectronics

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L78
Electrical characteristics
DocID2143 Rev 34
13/54
VI = 33 V, IO = 1 A, TJ = 0 to 125 °C (L7824AC), TJ = -40 to 125 °C (L7824AB), unless
otherwise specifieda
Table 9: Electrical characteristics of L7824A
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25 °C
23.5
24
24.5
V
VO
Output voltage
IO = 5 mA to 1 A, VI = 27.3 to 37 V
23
24
25
V
VO
Output voltage
IO = 1 A, VI = 37 to 38 V, TJ = 25 °C
23
24
25
V
∆VO (1)
Line regulation
VI = 27 to 38 V, IO = 500 mA, TJ = 25 °C
31
240
mV
VI = 30 to 36 V
35
200
mV
VI = 30 to 36 V, TJ = 25 °C
14
120
mV
VI = 26.7 to 38 V, TJ = 25 °C
31
240
mV
∆VO (1)
Load regulation
IO = 5 mA to 1 A
25
100
mV
IO = 5 mA to 1.5 A, TJ = 25 °C
30
100
IO = 250 to 750 mA
10
50
Iq
Quiescent current
TJ = 25 °C
4.6
6
mA
6
mA
∆Iq
Quiescent current change
VI = 27.3 to 38 V, IO = 500 mA
0.8
mA
VI = 27.3 to 38 V, TJ = 25 °C
0.8
mA
IO = 5 mA to 1 A
0.5
mA
SVR
Supply voltage rejection
VI = 28 to 38 V, f = 120 Hz, IO = 500 mA
54
dB
Vd
Dropout voltage
IO = 1 A, TJ = 25 °C
2
V
eN
Output noise voltage
TA = 25 °C, B = 10 Hz to 100 kHz
10
µV/VO
RO
Output resistance
f = 1 kHz
20
m
Isc
Short circuit current
VI = 35 V, TA = 25 °C
0.2
A
Iscp
Short circuit peak current
TJ = 25 °C
2.2
A
∆VO/∆T
Output voltage drift
-1.5
mV/°C
Notes:
(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.
a Minimum load current for regulation is 5 mA.



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