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PDF ( 数据手册 , 数据表 ) L7809A

零件编号 L7809A
描述 PRECISION 1A REGULATORS
制造商 STMicroelectronics
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L7809A 数据手册, 描述, 功能
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







L7809A pdf, 数据表
Electrical characteristics
L78
VI = 11 V, IO = 1 A, TJ = 0 to 125 °C (L7806AC), TJ = -40 to 125 °C (L7806AB), unless
otherwise specified(b).
Table 4. Electrical characteristics of L7806A
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
5.88 6 6.12 V
IO = 5 mA to 1 A, VI = 8.6 to 19 V
5.76 6 6.24 V
IO = 1 A, VI = 19 to 21 V, TJ = 25°C
5.76 6 6.24 V
VI = 8.6 to 25 V, IO = 500 mA, TJ = 25°C
9 60 mV
VI = 9 to 13 V
11 60 mV
VI = 9 to 13 V, TJ = 25°C
3 30 mV
VI = 8.3 to 21 V, TJ = 25°C
9 60 mV
IO = 5 mA to 1 A
25 100
IO = 5 mA to 1.5 A, TJ = 25°C
30 100 mV
IO = 250 to 750 mA
10 50
TJ = 25°C
4.3 6 mA
6 mA
VI = 9 to 24 V, IO = 500 mA
0.8 mA
ΔIq Quiescent current change VI = 8.6 to 21 V, TJ = 25°C
0.8 mA
IO = 5 mA to 1 A
0.5 mA
SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz, IO = 500 mA
65
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
17 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
-0.8 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.
8/59
b. Minimum load current for regulation is 5 mA.
DocID2143 Rev 33







L7809A equivalent, schematic
Electrical characteristics
L78
Refer to the test circuits, TJ = 0 to 125 °C, VI = 14 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified(j).
Table 12. Electrical characteristics of L7808C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
TJ = 25°C
7.7 8 8.3 V
VO Output voltage
IO = 5 mA to 1 A, VI = 10.5 to 21 V
7.6 8 8.4 V
VO Output voltage
IO = 1 A, VI = 21 to 25 V, TJ = 25°C
7.6 8 8.4 V
ΔVO(1) Line regulation
VI = 10.5 to 25 V, TJ = 25°C
VI = 11 to 17 V, TJ = 25°C
160
mV
80
ΔVO(1) Load regulation
IO = 5 mA to 1.5 A, TJ = 25°C
IO = 250 to 750 mA, TJ = 25°C
160
mV
80
Id Quiescent current
TJ = 25°C
8 mA
ΔId
IO = 5 mA to 1 A
Quiescent current change
VI = 10.5 to 25 V
0.5
mA
1
ΔVO/ΔT Output voltage drift
IO = 5 mA
-0.8 mV/°C
eN Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
52 µV/VO
SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz
56
dB
Vd Dropout voltage
IO = 1 A, TJ = 25°C
2V
RO Output resistance
f = 1 kHz
16 mΩ
Isc Short circuit current
VI = 35 V, TJ = 25°C
0.45 A
Iscp Short circuit peak current TJ = 25°C
2.2 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.
16/59
j. Minimum load current for regulation is 5 mA.
DocID2143 Rev 33










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