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PDF ( 数据手册 , 数据表 ) 7805A

零件编号 7805A
描述 Positive voltage regulator ICs
制造商 STMicroelectronics
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7805A 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.
March 2014
This is information on a product in full production.
DocID2143 Rev 32
1/58
www.st.com







7805A pdf, 数据表
Test circuits
4 Test circuits
Positive voltage regulator ICs
Figure 5. DC parameter
Figure 6. Load regulation
Figure 7. Ripple rejection
8/58 DocID2143 Rev 32







7805A equivalent, schematic
Electrical characteristics
Positive voltage regulator ICs
Refer to the test circuits, TJ = 0 to 125 °C, VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified(h).
Table 10. Electrical characteristics of L7805C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
TJ = 25°C
4.8 5 5.2 V
VO Output voltage
IO = 5 mA to 1 A, VI = 7 to 18 V
4.75 5 5.25 V
VO Output voltage
IO = 1 A, VI = 18 to 20V, TJ = 25°C
4.75 5 5.25 V
ΔVO(1) Line regulation
VI = 7 to 25 V, TJ = 25°C
VI = 8 to 12 V, TJ = 25°C
3 100
mV
1 50
ΔVO(1) Load regulation
IO = 5 mA to 1.5 A, TJ = 25°C
IO = 250 to 750 mA, TJ = 25°C
100
mV
50
Id Quiescent current
TJ = 25°C
8 mA
ΔId
IO = 5 mA to 1 A
Quiescent current change
VI = 7 to 23 V
0.5
mA
0.8
ΔVO/ΔT Output voltage drift
IO = 5 mA
-1.1 mV/°C
eN Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
40 µV/VO
SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz
62
dB
Vd Dropout voltage
IO = 1 A, TJ = 25°C
2V
RO Output resistance
f = 1 kHz
17 mΩ
Isc Short circuit current
VI = 35 V, TJ = 25°C
0.75 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.
16/58
h. Minimum load current for regulation is 5 mA.
DocID2143 Rev 32










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