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PDF 78S15C Data sheet ( Hoja de datos )
| Número de pieza | 78S15C | |
| Descripción | 2A positive voltage regulators | |
| Fabricantes | STMicroelectronics | |
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L78Sxx
L78SxxC
2 A positive voltage regulators
Features
■ Output current to 2 A
■ Output voltages of 5; 7.5; 9; 10; 12; 15; 18; 24 V
■ Thermal overload protection
■ Short circuit protection
■ Output transition SOA protection
Description
The L78Sxx series of three-terminal positive
regulators is available in TO-220 and TO-3
packages and with several fixed output voltages,
making it useful in a wide range of applications.
These regulators can provide local on-card
regulation, eliminating the distribution problems
associated with single point regulation. Each type
employs internal current limiting, thermal shut-
down and safe area protection, making it
essentially indestructible. If adequate heat sinking
is provided, they can deliver over 2 A output
current. Although designed primarily as fixed
voltage regulators, these devices can be used
with external components to obtain adjustable
voltages and currents.
www.DataSheet.net/
TO-220
TO-3
Table 1. Device summary
L78S05
L78S05C
L78S75
L78S75C
Part numbers
L78S09
L78S09C
L78S10
L78S10C
L78S12
L78S12C
L78S15
L78S15C
March 2008
Rev 3
L78S18
L78S18C
L78S24
L78S24C
1/31
www.st.com
31
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
L78Sxx - L78SxxC
3 Maximum ratings
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
Parameter
VI
IO
PD
TSTG
TOP
DC input voltage
Output current
for VO= 5 to 18V
for VO= 24V
Power dissipation
Storage temperature range
for L78Sxx
Operating junction temperature range
for L78SxxC
Value
35
40
Internally limited
Internally limited
-65 to 150
-55 to 150
0 to 150
Unit
V
°C
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 3. Thermal data
Symbol
Parameter
RthJC
RthJA
Thermal resistance junction-case
Thermal resistance junction-ambient
TO-220
5
50
TO-3
4
35
Unit
°C/W
°C/W
Figure 4. Application circuits
www.DataSheet.net/
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Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
L78Sxx - L78SxxC
Electrical characteristics
Table 11.
Symbol
Electrical characteristics of L78S24 (refer to the test circuits, TJ = 25 °C, VI = 33 V,
IO = 500 mA, unless otherwise specified)
Parameter
Test conditions
Min. Typ. Max. Unit
VO
VO
ΔVO
ΔVO
IQ
ΔIQ
ΔVO/ΔT
eN
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output voltage drift
Output noise voltage
IO = 1A, VI = 27V
VI = 27 to 38V
VI = 30 to 36V
IO = 20 mA to 2A
IO = 20mA to 1A
VI = 27 to 38 V, IO = 20mA
IO = 5mA, TJ = -55°C to 150°C
B =10Hz to 100kHz
23 24 25
V
22.8 24 25.2 V
480
mV
240
250 mV
8 mA
0.5
mA
1
-1.5 mV/°C
170 µV
SVR
VI
RO
Isc
Iscp
Supply voltage rejection
Operating input voltage
Output resistance
Short circuit current
Short circuit peak current
f = 120Hz
IO ≤1.5A
f = 1 kHz
VI = 27V
48
27
23
500
3
dB
V
mΩ
mA
A
Table 12.
Symbol
Electrical characteristics of L78S05C (refer to the test circuits, TJ = 25 °C, VI = 10 V,
IO = 500 mA, unless otherwise specified) www.DataSheet.net/
Parameter
Test conditions
Min. Typ. Max. Unit
VO
VO
ΔVO
ΔVO
IQ
ΔIQ
ΔVO/ΔT
eN
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output voltage drift
Output noise voltage
IO = 1A, VI = 7V
VI = 7 to 25V
VI = 8 to 25V
IO = 20 mA to 1.5A
IO = 2A
IO = 20mA to 1A
VI = 7 to 25 V, IO = 20mA
IO = 5mA, TJ = 0°C to 70°C
B =10Hz to 100kHz
SVR Supply voltage rejection f = 120Hz
VI Operating input voltage IO ≤1A
RO Output resistance
f = 1 kHz
Isc Short circuit current
VI = 27V
Iscp Short circuit peak current
4.8 5 5.2 V
4.75 5 5.25 V
100
mV
50
100
mV
80
8 mA
0.5
mA
1.3
-1.1 mV/°C
40 µV
54 dB
8V
17 mΩ
500 mA
3A
11/31
Datasheet pdf - http://www.DataSheet4U.co.kr/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet 78S15C.PDF ] | |
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