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PDF L7808A Data sheet ( Hoja de datos )

Número de pieza L7808A
Descripción PRECISION 1A REGULATORS
Fabricantes STMicroelectronics 
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No Preview Available ! L7808A Hoja de datos, Descripción, Manual

L78
TO-220
TO-220FP
DPAK
D²PAK
Features
Output current up to 1.5 A
Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18;
24 V
Thermal overload protection
Short circuit protection
Output transition SOA protection
2 % output voltage tolerance (A version)
Guaranteed in extended temperature range
(A version)
Positive voltage regulator ICs
Datasheet - production data
Description
The L78 series of three-terminal positive
regulators is available in TO-220, TO-220FP,
D²PAK and DPAK packages and 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
embeds internal current limiting, thermal shut-
down and safe area protection, making it
essentially indestructible. If adequate heat sinking
is provided, they can deliver over 1 A output
current. Although designed primarily as fixed
voltage regulators, these devices can be used
with external components to obtain adjustable
voltage and currents.
February 2016
This is information on a product in full production.
DocID2143 Rev 33
1/59
www.st.com

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L7808A pdf
L78
3 Maximum ratings
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
Parameter
VI
IO
PD
TSTG
TOP
DC input voltage
Output current
for VO= 5 to 18 V
for VO= 20, 24 V
Power dissipation
Storage temperature range
for L78xxC, L78xxAC
Operating junction temperature range
for L78xxAB
Value
35
40
Internally limited
Internally limited
-65 to 150
0 to 125
-40 to 125
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 2. Thermal data
Symbol
Parameter
D²PAK DPAK
RthJC
RthJA
Thermal resistance junction-case
Thermal resistance junction-ambient
3
62.5
8
100
TO-220
5
50
TO-220FP
5
60
Unit
°C/W
°C/W
Figure 4. Application circuits
DocID2143 Rev 33
5/59
59

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L7808A arduino
L78 Electrical characteristics
VI = 19 V, IO = 1 A, TJ = 0 to 125 °C (L7812AC), TJ = -40 to 125 °C (L7812AB), unless
otherwise specified(e).
Table 7. Electrical characteristics of L7812A
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
VO Output voltage
ΔVO (1) Line regulation
ΔVO (1) Load regulation
Iq Quiescent current
TJ = 25°C
IO = 5 mA to 1 A, VI = 14.8 to 25 V
IO = 1 A, VI = 25 to 27 V, TJ = 25°C
VI = 14.8 to 30 V, IO = 500 mA,
TJ = 25°C
VI = 16 to 12 V
VI = 16 to 12 V, TJ = 25°C
VI = 14.5 to 27 V, TJ = 25°C
IO = 5 mA to 1 A
IO = 5 mA to 1.5 A, TJ = 25°C
IO = 250 to 750 mA
TJ = 25°C
11.75 12 12.25
11.5 12 12.5
11.5 12 12.5
V
V
V
13 120 mV
16 120 mV
6 60 mV
13 120 mV
25 100
30 100 mV
10 50
4.4 6 mA
6 mA
VI = 15 to 30 V, IO = 500 mA
0.8 mA
ΔIq Quiescent current change VI = 14.8 to 27 V, TJ = 25°C
0.8 mA
IO = 5 mA to 1 A
0.5 mA
SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz, IO = 500 mA
60
dB
Vd Dropout voltage
IO = 1 A, TJ = 25°C
2V
eN Output noise voltage
TA = 25°C, B = 10 Hz to 100 kHz
10 µV/VO
RO Output resistance
f = 1 kHz
18 mΩ
Isc Short circuit current
VI = 35 V, TA = 25°C
0.2 A
Iscp Short circuit peak current TJ = 25°C
2.2 A
ΔVO/ΔT Output voltage drift
-1 mV/°C
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.
e. Minimum load current for regulation is 5 mA.
DocID2143 Rev 33
11/59
59

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