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L78SXX Scheda tecnica(PDF) 11 Page - STMicroelectronics

Il numero della parte L78SXX
Spiegazioni elettronici  2 A positive voltage regulators
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L78Sxx - L78SxxC
Electrical characteristics
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Table 11.
Electrical characteristics of L78S24 (refer to the test circuits, TJ = 25 °C, VI = 33 V,
IO = 500 mA, unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
23
24
25
V
VO
Output voltage
IO = 1A, VI = 27V
22.8
24
25.2
V
ΔVO
Line regulation
VI = 27 to 38V
480
mV
VI = 30 to 36V
240
ΔVO
Load regulation
IO = 20 mA to 2A
250
mV
IQ
Quiescent current
8
mA
ΔIQ
Quiescent current change
IO = 20mA to 1A
0.5
mA
VI = 27 to 38 V, IO = 20mA
1
ΔVO/ΔT Output voltage drift
IO = 5mA, TJ = -55°C to 150°C
-1.5
mV/°C
eN
Output noise voltage
B =10Hz to 100kHz
170
µV
SVR
Supply voltage rejection
f = 120Hz
48
dB
VI
Operating input voltage
IO 1.5A
27
V
RO
Output resistance
f = 1 kHz
23
m
Ω
Isc
Short circuit current
VI = 27V
500
mA
Iscp
Short circuit peak current
3
A
Table 12.
Electrical characteristics of L78S05C (refer to the test circuits, TJ = 25 °C, VI = 10 V,
IO = 500 mA, unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
4.8
5
5.2
V
VO
Output voltage
IO = 1A, VI = 7V
4.75
5
5.25
V
ΔVO
Line regulation
VI = 7 to 25V
100
mV
VI = 8 to 25V
50
ΔVO
Load regulation
IO = 20 mA to 1.5A
100
mV
IO = 2A
80
IQ
Quiescent current
8
mA
ΔIQ
Quiescent current change
IO = 20mA to 1A
0.5
mA
VI = 7 to 25 V, IO = 20mA
1.3
ΔVO/ΔT Output voltage drift
IO = 5mA, TJ = 0°C to 70°C
-1.1
mV/°C
eN
Output noise voltage
B =10Hz to 100kHz
40
µV
SVR
Supply voltage rejection
f = 120Hz
54
dB
VI
Operating input voltage
IO 1A
8
V
RO
Output resistance
f = 1 kHz
17
m
Ω
Isc
Short circuit current
VI = 27V
500
mA
Iscp
Short circuit peak current
3
A


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