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L78M12C Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer L78M12C
Beschreibung Precision 500 mA regulators
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 30 Seiten
L78M12C Datasheet, Funktion
L78M
TO-220
TO-220FP
DPAK
IPAK
Features
Output current to 0.5 A
Output voltages of 5; 6; 8; 9; 10; 12; 15; 24 V
Thermal overload protection
Short circuit protection
Output transition SOA protection
Output voltage tolerance: 2% (AB and AC
versions) or 4% (C version)
Guaranteed in extended temperature range
Precision 500 mA regulators
Datasheet - production data
Description
The L78M series of three-terminal positive
regulators is available in TO-220, TO-220FP,
DPAK and IPAK 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 shutdown and safe area
protection, resulting it essentially indestructible. If
adequate heat sinking is provided, they can
deliver over 0.5 A output current. Although
designed primarily as fixed voltage regulators,
these devices can be used with external
components to obtain adjustable voltage and
currents.
June 2014
This is information on a product in full production.
DocID2146 Rev 20
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L78M12C Datasheet, Funktion
Test circuits
4 Test circuits
Figure 5. DC parameter
L78M
Figure 6. Load regulation
Figure 7. Ripple rejection
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L78M12C pdf, datenblatt
Electrical characteristics
L78M
Refer to the test circuits, VI = 14 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to
125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified.
Symbol
Table 8. Electrical characteristics of L78M08A
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
TJ = 25°C
7.84 8 8.16 V
VO Output voltage
IO = 5 to 350 mA, VI = 10.5 to 23 V
7.7 8 8.3 V
ΔVO Line regulation
VI = 10.5 to 25 V, IO = 200 mA,
TJ = 25°C
VI = 11 to 25 V, IO = 200 mA, TJ = 25°C
100
mV
30
ΔVO Load regulation
IO = 5 to 500 mA, TJ = 25°C
IO = 5 to 200 mA, TJ = 25°C
160
mV
80
Id Quiescent current
TJ = 25°C
6 mA
ΔId
IO = 5 to 350 mA
Quiescent current change
IO = 200 mA, VI = 10.5 to 25 V
0.5
mA
0.8
ΔVO/ΔT Output voltage drift
IO = 5 mA
-0.5 mV/°C
SVR Supply voltage rejection
VI = 11.5 to 21.5 V, f = 120 Hz
IO = 300 mA, TJ = 25°C
56
dB
eN Output noise voltage
B =10 Hz to 100 kHz, TJ = 25°C
52 µV
Vd Dropout voltage
TJ = 25°C
2V
Isc Short circuit current
TJ = 25°C, VI = 35 V
250 mA
Iscp Short circuit peak current TJ = 25°C
700 mA
12/46
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