ST L78M05C, L78M05CV, L78M05CV-DG, L78M05CP, L78M05CDT-TR User Manual
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Features
■ Output current to 0.5 A
■ Output voltages of 5; 6; 8; 9; 12; 15; 24 V
■ Thermal overload protection
■ Short circuit protection
■ Output transition SOA protection
Description
The L78MxxC 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, making 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.
L78MxxC
Positive voltage regulators
Datasheet − production data
TO-220
DPAK
TO-220FP
IPAK
Table 1. Device summary
Order codes
Part numbers
TO-220 TO-220
L78M05C L78M05CV L78M05CV-DG L78M05CP L78M05CDT-TR L78M05CDT-1 5 V
L78M06C L78M06CDT-TR L78M06CDT-1
L78M08C L78M08CV L78M08CV-DG L78M08CDT-TR L78M08CDT-1
L78M09C L78M09CV L78M09CV-DG L78M09CDT-TR L78M09CDT-1
L78M12C L78M12CV L78M12CV-DG L78M12CDT-TR 12 V
L78M15C L78M15CV L78M15CV-DG L78M15CDT-TR 15 V
L78M24C L78M24CV L78M24CV-DG L78M24CP
1. TO-220 Dual Gauge frame
2. Available on request
May 2012 Doc ID 2146 Rev 18 1/30
This is information on a product in full production.
(1)
TO-220FP DPAK IPAK
(2)
L78M24CDT-TR L78M24CDT-1
(2)
(2)
(2)
(2)
Output
voltages
6 V
8 V
9 V
24 V
www.st.com
30
Contents L78MxxC
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2/30 Doc ID 2146 Rev 18
L78MxxC Diagram
1 Diagram
Figure 1. Block diagram
Doc ID 2146 Rev 18 3/30
Pin configuration L78MxxC
2 Pin configuration
Figure 2. Pin connections (top view)
TO-220
DPAK
Figure 3. Schematic diagram
TO220FP
IPAK
4/30 Doc ID 2146 Rev 18
L78MxxC Maximum ratings
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
for V
= 5 to 18 V 35
O
= 20, 24 V 40
for V
O
V
T
P
T
V
I
STG
OP
DC input voltage
I
Output current Internally limited mA
O
Power dissipation Internally limited mW
D
Storage temperature range - 65 to 150 °C
Operating junction temperature range 0 to 150 °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 TO-220 TO-220FP DPAK IPAK Unit
R
R
Figure 4. Application circuit
Thermal resistance junction-case 5 5 8 °C/W
thJC
Thermal resistance junction-ambient 50 60 100 °C/W
thJA
Doc ID 2146 Rev 18 5/30
Test circuits L78MxxC
4 Test circuits
Figure 5. DC parameter
Figure 6. Load regulation
Figure 7. Ripple rejection
6/30 Doc ID 2146 Rev 18
L78MxxC Electrical characteristics
5 Electrical characteristics
Refer to the test circuits, TJ = 25 °C, VI = 10 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless
otherwise specified.
Table 4. Electrical characteristics of L78M05C
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔI
Output voltage 4.8 5 5.2 V
O
Output voltage IO = 5 to 350 mA, VI = 7 to 20 V 4.75 5 5.25 V
O
= 7 to 25 V, IO = 200 mA 100
V
Line regulation
O
Load regulation
O
I
Quiescent current 6 mA
d
Quiescent current change
d
I
VI = 8 to 25 V, IO = 200 mA 50
I
= 5 to 500 mA, TJ = 25 °C 100
O
= 5 to 200 mA, TJ = 25 °C 50
I
O
I
= 5 to 350 mA 0.5
O
= 200 mA, VI = 8 to 25 V 0.8
I
O
mV
mV
mA
ΔVO/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -0.5 mV/°C
SVR Supply voltage rejection V
= 8 to 18 V, f = 120 Hz, IO = 300 mA 62 dB
I
eN Output noise voltage B = 10 Hz to 100 kHz 40 µV
V
I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 300 mA
sc
Doc ID 2146 Rev 18 7/30
Electrical characteristics L78MxxC
Refer to the test circuits, TJ = 25 °C, VI = 11 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless
otherwise specified.
Table 5. Electrical characteristics of L78M06C
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection V
Output voltage 5.75 6 6.25 V
O
Output voltage IO = 5 to 350 mA, VI = 8 to 21 V 5.7 6 6.3 V
O
V
= 8 to 25 V, IO = 200 mA 100
Line regulation
O
Load regulation
O
I
Quiescent current 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -0.5 mV/°C
O
I
= 9 to 25 V, IO = 200 mA 50
V
I
= 5 to 500 mA, TJ = 25 °C 120
I
O
IO = 5 to 200 mA, TJ = 25 °C 60
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 9 to 25 V 0.8
= 9 to 19 V, f = 120 Hz, IO = 300 mA 59 dB
I
eN Output noise voltage B = 10 Hz to 100 kHz 45 µV
V
I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 270 mA
sc
Refer to the test circuits, TJ = 25 °C, VI = 14 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless
otherwise specified.
Table 6. Electrical characteristics of L78M08C
mV
mV
mA
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
Output voltage 7.7 8 8.3 V
O
Output voltage IO = 5 to 350 mA, VI = 10.5 to 23 V 7.6 8 8.4 V
O
V
= 10.5 to 25 V, IO = 200 mA 100
Line regulation
O
Load regulation
O
I
Quiescent current 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -0.5 mV/°C
O
I
= 11 to 25 V, IO = 200 mA 50
V
I
I
= 5 to 500 mA, TJ = 25 °C 160
O
= 5 to 200 mA, TJ = 25 °C 80
I
O
I
= 5 to 350 mA 0.5
O
= 200 mA, VI = 10.5 to 25 V 0.8
I
O
VI = 11.5 to 21.5 V, f = 120 Hz,
= 300 mA
I
O
56 dB
eN Output noise voltage B = 10 Hz to 100 kHz 52 µV
V
I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 250 mA
sc
8/30 Doc ID 2146 Rev 18
mV
mV
mA
L78MxxC Electrical characteristics
Refer to the test circuits, TJ = 25 °C, VI = 15 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless
otherwise specified.
Table 7. Electrical characteristics of L78M09C
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
Output voltage 8.65 9 9.35 V
O
Output voltage IO = 5 to 350 mA, VI = 11.5 to 24 V 8.55 9 9.45 V
O
V
= 11.5 to 25 V, IO = 200 mA 100
Line regulation
O
Load regulation
O
I
Quiescent current 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -0.5 mV/°C
O
I
= 12 to 25 V, IO = 200 mA 50
V
I
= 5 to 500 mA, TJ = 25 °C 180
I
O
IO = 5 to 200 mA, TJ = 25 °C 90
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 11.5 to 25 V 0.8
= 12.5 to 23 V, f = 120 Hz,
V
I
I
= 300 mA
O
56 dB
eN Output noise voltage B = 10 Hz to 100 kHz 58 µV
V
I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 250 mA
sc
Refer to the test circuits, TJ = 25 °C, VI = 19 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless
otherwise specified.
Table 8. Electrical characteristics of L78M12C
mV
mV
mA
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔI
Output voltage 11.5 12 12.5 V
O
Output voltage IO = 5 to 350 mA, VI = 14.5 to 27 V 11.4 12 12.6 V
O
V
= 14.5 to 30 V, IO = 200 mA 100
Line regulation
O
Load regulation
O
I
Quiescent current 6 mA
d
Quiescent current change
d
I
= 16 to 30 V, IO = 200 mA 50
V
I
I
= 5 to 500 mA, TJ = 25 °C 240
O
= 5 to 200 mA, TJ = 25 °C 120
I
O
I
= 5 to 350 mA 0.5
O
= 200 mA, VI = 14.5 to 30 V 0.8
I
O
mV
mV
mA
ΔVO/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -1 mV/°C
SVR Supply voltage rejection V
= 15 to 25 V, f = 120 Hz, IO = 300 mA 55 dB
I
eN Output noise voltage B = 10 Hz to 100 kHz 75 µV
V
I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 240 mA
sc
Doc ID 2146 Rev 18 9/30
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