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L78M05ACDT STM
Datasheet
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ST MICROELECTRONICS L78M05ACDT STM Datasheet

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Features
TO-220
DPAK
TO-220FP
IPAK
• 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
L78M
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 assoc ia ted with sing le 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 DocID2146 Rev 20 1/46
This is information on a product in full production.
www.st.com
Contents L78M
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1 Design considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
2/46 DocID2146 Rev 20
L78M Diagram

1 Diagram

Figure 1. Block diagram

DocID2146 Rev 20 3/46
46
Pin configuration L78M
TO220FP
IPAK
TO-220
DPAK

2 Pin configuration

Figure 2. Pin connections (top view)

Figure 3. Schematic diagram

4/46 DocID2146 Rev 20
L78M Maximum ratings

3 Maximum ratings

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit
for V
= 5 to 18 V 35
O
= 20, 24 V 40
for V
O
for L78MxxAC 0 to 125
for L78MxxC 0 to 150
V
°Cfor L78MxxAB -40 to 125
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
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 TO-220 TO-220FP DPAK IPAK Unit
R R
Thermal resistance junc tion-case 5 5 8 8 °C/W
thJC
Thermal resistance junction-ambient 50 60 100 100 °C/W
thJA

Figure 4. Application circuit

DocID2146 Rev 20 5/46
46
Test circuits L78M

4 Test circuits

Figure 5. DC parameter

Figure 6. Load regulation

Figure 7. Ripple rejection

6/46 DocID2146 Rev 20
L78M Electrical characterist ics

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.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 3. Electrical characteristics of L78M05C

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 curr ent 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
DocID2146 Rev 20 7/46
46
Electrical characteristics L78M
Refer to the test circuits, VI = 10 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 4. Electrical characteristics of L78M05A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 4.9 5 5.1 V
O
Output voltage IO = 5 to 350 mA, VI = 7 to 20 V 4.8 5 5.2 V
O
V
= 7 to 25 V, IO = 200 mA, TJ = 25°C 100
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -0.5 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current TJ = 25°C, VI = 35 V 300 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
I
= 8 to 25 V, IO = 200 mA, TJ = 25°C 50
V
I
= 5 to 500 mA, TJ = 25°C 100
I
O
IO = 5 to 200 mA, TJ = 25°C 50
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 8 to 25 V 0.8
= 8 to 18 V , f = 120 Hz, IO = 300 mA,
V
I
T
= 25°C
J
= 25°C 40 µV
J
62 dB
mV
mV
mA
8/46 DocID2146 Rev 20
L78M Electrical characterist ics
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.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 5. Electrical characteristics of L78M06C

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 curr ent 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
mV
mV
mA
DocID2146 Rev 20 9/46
46
Electrical characteristics L78M
Refer to the test circuits, VI = 11 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 6. Electrical characteristics of L78M06A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
Output voltage TJ = 25°C 5.88 6 6.12 V
O
Output voltage IO = 5 to 350 mA, VI = 8 to 21 V 5.75 6 6.3 V
O
V
= 8 to 25 V, IO = 200 mA, TJ = 25°C 100
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -0.5 mV/°C
O
I
= 9 to 25 V, IO = 200 mA, TJ = 25°C 30
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,
V
I
T
= 25°C
J
59 dB
eN Output noise voltage B =10 Hz to 100 kHz 45 µV V I
I
Dropout voltage TJ = 25°C 2 V
d
Short circuit current TJ = 25°C, VI = 35 V 270 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
mV
mV
mA
10/46 DocID2146 Rev 20
L78M Electrical characterist ics
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.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 7. Electrical characteristics of L78M08C

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 curr ent 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
= 5 to 500 mA, TJ = 25 °C 160
I
O
IO = 5 to 200 mA, TJ = 25 °C 80
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 10.5 to 25 V 0.8
= 11.5 to 21.5 V, f = 120 Hz,
V
I
I
= 300 mA
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
mV
mV
mA
DocID2146 Rev 20 11/46
46
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), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 8. Electrical characteristics of L78M08A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 7.84 8 8.16 V
O
Output voltage IO = 5 to 350 mA, VI = 10.5 to 23 V 7.7 8 8.3 V
O
VI = 10.5 to 25 V, IO = 200 mA,
= 25°C
T
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -0.5 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current TJ = 25°C, VI = 35 V 250 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
J
= 11 to 25 V, IO = 200 mA, TJ = 25°C 30
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, TJ = 25°C
I
O
= 25°C 52 µV
J
56 dB
100
mV
mV
mA
12/46 DocID2146 Rev 20
L78M Electrical characterist ics
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.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 9. Electrical characteristics of L78M09C

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 curr ent 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
mV
mV
mA
DocID2146 Rev 20 13/46
46
Electrical characteristics L78M
Refer to the test circuits, VI = 15 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 10. Electrical characteristics of L78M09A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 8.82 9 9.18 V
O
Output voltage IO = 5 to 350 mA, VI = 11.5 to 24 V 8.64 9 9.36 V
O
VI = 11.5 to 25 V, IO = 200 mA,
= 25°C
T
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -0.5 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current VI = 35 V, TJ = 25°C 250 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
J
= 12 to 25 V, IO = 200 mA, TJ = 25°C 30
V
I
I
= 5 to 500 mA, TJ = 25°C 180
O
= 5 to 200 mA, TJ = 25°C 90
I
O
I
= 5 to 350 mA 0.5
O
= 200 mA, VI = 11.5 to 25 V 0.8
I
O
VI = 12.5 to 23 V, f = 120 Hz,
= 300 mA, TJ = 25°C
I
O
= 25°C 52 µV
J
56 dB
100
mV
mV
mA
14/46 DocID2146 Rev 20
L78M Electrical characterist ics
Refer to the test circuits, VI = 16 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 11. Electrical characteristics of L78M10A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 9.8 10 10.2 V
O
Output voltage IO = 5 to 350 mA, VI = 12.5 to 25 V 9.6 10 10.4 V
O
VI = 12.5 to 30 V, IO = 200 mA,
= 25°C
T
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -0.5 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current VI = 35 V, TJ = 25°C 245 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
J
= 13 to 30 V, IO = 200 mA, TJ = 25°C 30
V
I
I
= 5 to 500 mA, TJ = 25°C 200
O
= 5 to 200 mA, TJ = 25°C 100
I
O
I
= 5 to 350 mA 0.5
O
= 200 mA, VI = 12.5 to 30 V 0.8
I
O
VI = 13.5 to 24 V, f = 120 Hz,
= 300 mA, TJ = 25°C
I
O
= 25°C 64 µV
J
56 dB
100
mV
mV
mA
DocID2146 Rev 20 15/46
46
Electrical characteristics L78M
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.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 12. Electrical characteristics of L78M12C

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection V
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 curr ent 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -1 mV/°C
O
I
= 16 to 30 V, IO = 200 mA 50
V
I
= 5 to 500 mA, TJ = 25 °C 240
I
O
IO = 5 to 200 mA, TJ = 25 °C 120
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 14.5 to 30 V 0.8
= 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
mV
mV
mA
16/46 DocID2146 Rev 20
L78M Electrical characterist ics
Refer to the test circuits, VI = 19 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 13. Electrical characteristics of L78M12A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 11.75 12 12.25 V
O
Output voltage IO = 5 to 350 mA, VI = 14.5 to 27 V 11.5 12 12.5 V
O
VI = 14.5 to 30 V, IO = 200 mA,
= 25°C
T
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -1 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current VI = 35 V, TJ = 25°C 240 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
J
= 16 to 30 V, IO = 200 mA, TJ = 25°C 30
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
VI = 15 to 25 V, f = 120 Hz, IO = 300 mA,
= 25°C
T
J
= 25°C 75 µV
J
55 dB
100
mV
mV
mA
DocID2146 Rev 20 17/46
46
Electrical characteristics L78M
Refer to the test circuits, TJ = 25 °C, VI = 23 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 14. Electrical characteristics of L78M15C

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
Output voltage 14.4 15 15.6 V
O
Output voltage IO = 5 to 350 mA, VI = 17.5 to 30 V 14.25 15 15.75 V
O
V
= 17.5 to 30 V, IO = 200 mA 100
Line regulation
O
Load regulation
O
I
Quiescent curr ent 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -1 mV/°C
O
I
= 20 to 30 V, IO = 200 mA 50
V
I
= 5 to 500 mA, TJ = 25 °C 300
I
O
IO = 5 to 200 mA, TJ = 25 °C 150
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 17.5 to 30 V 0.8
= 18.5 to 28.5 V, f = 120 Hz,
V
I
I
= 300 mA
O
54 dB
eN Output noise voltage B = 10 Hz to 100 kHz 90 µV V I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 240 mA
sc
mV
mV
mA
18/46 DocID2146 Rev 20
L78M Electrical characterist ics
Refer to the test circuits, VI = 23 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 15. Electrical characteristics of L78M15A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 14.7 15 15.3 V
O
Output voltage IO = 5 to 350 mA, VI = 17.5 to 30 V 14.4 15 15.6 V
O
VI = 17.5 to 30 V, IO = 200 mA,
= 25°C
T
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -1 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current VI = 35 V, TJ = 25°C 240 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
J
= 20 to 30 V, IO = 200 mA, TJ = 25°C 30
V
I
I
= 5 to 500 mA, TJ = 25°C 300
O
= 5 to 200 mA, TJ = 25°C 150
I
O
I
= 5 to 350 mA 0.5
O
= 200 mA, VI = 17.5 to 30 V 0.8
I
O
VI = 18.5 to 28.5 V, f = 120 Hz,
= 300 mA, TJ = 25°C
I
O
= 25°C 90 µV
J
54 dB
100
mV
mV
mA
DocID2146 Rev 20 19/46
46
Electrical characteristics L78M
Refer to the test circuits, TJ = 25 °C, VI = 33 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified.
Symbol Parameter Test conditions Min. Typ. Max. Unit

Table 16. Electrical characteristics of L78M24C

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection V
Output voltage 23 24 25 V
O
Output voltage IO = 5 to 350 mA, VI = 27 to 38 V 22.8 24 25.2 V
O
V
= 27 to 38 V, IO = 200 mA 100
Line regulation
O
Load regulation
O
I
Quiescent curr ent 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA, TJ = 0 to 125 °C -1.2 mV/°C
O
I
= 28 to 38 V, IO = 200 mA 50
V
I
= 5 to 500 mA, TJ = 25 °C 480
I
O
IO = 5 to 200 mA, TJ = 25 °C 240
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 27 to 38 V 0.8
= 28 to 38 V, f = 120 Hz, IO = 300 mA 50 dB
I
eN Output noise voltage B = 10 Hz to 100 kHz 170 µV V I
Dropout voltage 2 V
d
Short circuit current VI = 35 V 240 mA
sc
mV
mV
mA
20/46 DocID2146 Rev 20
L78M Electrical characterist ics
Refer to the test circuits, VI = 33 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), T
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 0 to 125 °C (AC) unless otherwise specified.
J

Table 17. Electrical characteristics of L78M24A

V V
ΔV
ΔV
ΔI
ΔV
SVR Supply voltage rejection
eN Output noise voltage B =10 Hz to 100 kHz, T V I
I
Output voltage TJ = 25°C 23.5 24 24.5 V
O
Output voltage IO = 5 to 350 mA, VI = 27 to 38 V 23 24 25 V
O
V
= 27 to 38 V, IO = 200 mA, TJ = 25°C 100
Line regulation
O
Load regulation
O
I
Quiescent curr ent TJ = 25°C 6 mA
d
Quiescent current change
d
/ΔT Output voltage drift IO = 5 mA -1.2 mV/°C
O
Dropout voltage TJ = 25°C 2 V
d
Short circuit current VI = 35 V, TJ = 25°C 240 mA
sc
Short circuit peak current TJ = 25°C 700 mA
scp
I
= 28 to 38 V, IO = 200 mA, TJ = 25°C 30
V
I
= 5 to 500 mA, TJ = 25°C 480
I
O
IO = 5 to 200 mA, TJ = 25°C 240
= 5 to 350 mA 0.5
I
O
IO = 200 mA, VI = 27 to 38 V 0.8
= 28 to 38 V, f = 120 Hz, IO = 300 mA,
V
I
T
= 25°C
J
= 25°C 170 µV
J
50 dB
mV
mV
mA
DocID2146 Rev 20 21/46
46
Typical performance L78M

6 Typical performance

Figure 8. Dropout voltage vs. junction temp. Figure 9. Dropout characteristics

Figure 10. Peak output current vs. input-output
differential voltage
Figure 11. Output voltage vs. junction
temperature
22/46 DocID2146 Rev 20
L78M Typical performance
Figure 12. Supply voltage rejection vs.

Figure 14. Load transient response Figure 15. Line transient response

frequency
Figure 13. Quiescent current vs. junction
temperature

Figure 16. Quiescent current vs. input voltage

DocID2146 Rev 20 23/46
46
Applications information L78M

7 Applications information

7.1 Design considerations

The L78M series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output short-circuit as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to insure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead.

Figure 17. Fixed output regulator

Note: Although no output capacitor is need for stability, Co improve transient response if present.
C
is required if regulator is located an appreciable distance from power supply filter.
I
24/46 DocID2146 Rev 20
L78M Applications information
,2 9;;5,
G
,5t,
G
92 9;;55,G5

Figure 18. Constant current regulato r

Figure 19. Circuit for increasing output voltage

Figure 20. Adjustable output regulator (7 to 30 V)

DocID2146 Rev 20 25/46
46
Applications information L78M
92 9;;55
5
,2 ,
5(*
4,
5(*
B9BBBB
%(4
B
9
%(4
5 BBBBBBBBBBBBBB
,
5(4
,4E4
56& 9
%(4,6&

Figure 21. 0.5 to 10 V regulator

Figure 22. High current voltage regulator

26/46 DocID2146 Rev 20

Figure 23. High output current with short circuit protection

L78M Applications information
9,1 9,9=9%(
999
5 BB
,PL
BBBQBBBB;;BBB
'52
BBBB
3PD[
BBBB
,
2PD[,GPD[

Figure 24. Tracking voltage regulator

Figure 25. High input voltage circuit

Figure 26. Reducing power dissipation with dropping resistor

DocID2146 Rev 20 27/46
46
Applications information L78M
92 9;;559
%(
Figure 27. Power AM modulator (unity voltage gain, I
Note: The circuit performs well up to 100 kHz.

Figure 28. Adjustable output voltage with temperature compensation

≤ 0.5)
O
Note: Q2 is connected as a diode in order to compensate the variation of the Q1 VBE with the
28/46 DocID2146 Rev 20
temperature. C allows a slow rise time of the V
.
O
L78M Package mechanical data
BUHY'

8 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of
®
ECOPACK
packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark.

Figure 29. TO-220 (single gauge) drawing

DocID2146 Rev 20 29/46
46
Package mechanical data L78M

Table 18. TO-220 (single gauge) mechanical data

mm
Dim.
Min. Typ. Max.
A 4.40 4.60 b 0.61 0.88
b1 1.14 1.70
c 0.48 0.70 D 15.25 15.75 E 10 10.40 e 2.40 2.70
e1 4.95 5.15
F 0.51 0.60
H1 6.20 6.60
J1 2.40 2.72
L13 14
L1 3.50 3.93 L20 16.40 L30 28.90
∅
P 3.75 3.85
Q 2.65 2.95
30/46 DocID2146 Rev 20
L78M Package mechanical data
BW\SH$B5HYB7

Figure 30. TO-220 (dual gauge) drawing

DocID2146 Rev 20 31/46
46
Package mechanical data L78M

Table 19. TO-220 (dual gauge) mechanical data

mm
Dim.
Min. Typ. Max.
A 4.40 4.60 b 0.61 0.88
b1 1.14 1.70
c 0.48 0.70 D 15.25 15.75
D1 1.27
E 10 10.40 e 2.40 2.70
e1 4.95 5.15
F 1.23 1.32
H1 6.20 6.60
J1 2.40 2.72
L13 14
L1 3.50 3.93 L20 16.40 L30 28.90
∅
P 3.75 3.85
Q 2.65 2.95
32/46 DocID2146 Rev 20
L78M Package mechanical data
7012510_Rev_K
A
B
H
Dia
L7
D
E
L6
L5
L2
L3
L4
F1
F2
F
G
G1

Figure 31. TO-220FP drawing

DocID2146 Rev 20 33/46
46
Package mechanical data L78M

Table 20. TO-220FP mechanical data

mm
Dim.
Min. Typ. Max.
A4.4 4.6 B2.5 2.7 D2.5 2.75 E 0.45 0.7
F0.75 1 F1 1.15 1.70 F2 1.15 1.70
G 4.95 5.2
G1 2.4 2.7
H10 10.4 L2 16 L3 28.6 30.6 L4 9.8 10.6 L5 2.9 3.6 L6 15.9 16.4 L7 9 9.3
Dia 3 3.2
34/46 DocID2146 Rev 20
L78M Package mechanical data
B3

Figure 32. DPAK drawing

DocID2146 Rev 20 35/46
46
Package mechanical data L78M

Table 21. DPAK mechanical data

mm
Dim.
Min. Typ. Max.
A2.20 2.40
A1 0.90 1.10 A2 0.03 0.23
b0.64 0.90
b4 5.20 5.40
c0.45 0.60
c2 0.48 0.60
D6.00 6.20
D1 5.10
E6.40 6.60
E1 4.70
e2.28
e1 4.40 4.60
H 9.35 10.10
L1.00 1.50
(L1) 2.80
L2 0.80 L4 0.60 1.00
R0.20
V2 0° 8°
36/46 DocID2146 Rev 20
L78M Package mechanical data
)3B3

Figure 33. DPAK footprint

(a)
a. All dimensions are in millimeters
DocID2146 Rev 20 37/46
46
Package mechanical data L78M
B3B)

Figure 34. DPAK type F drawing

38/46 DocID2146 Rev 20
L78M Package mechanical data

Table 22. DPAK (TO-252) type F mechanical data

mm
Dim.
Min. Typ. Max.
A2.18 2.40
A1 0.90 1.10 A2 0.03 0.23
b0.64 0.90
b4 4.95 5.46
c0.46 0.61
c2 0.46 0.60
D5.97 6.22
E6.35 6.73 e1 4.40 4.70
H 9.35 10.34
L1.00 1.78 L2 1.27 L4 0.60 1.02
V2 0° 8°
DocID2146 Rev 20 39/46
46
Package mechanical data L78M
0068771_K

Figure 35. IPAK drawing

40/46 DocID2146 Rev 20
L78M Package mechanical data

Table 23. IPAK mechanical data

mm.
DIM
min. typ. max.
A 2.20 2.40
A1 0.90 1.10
b 0.64 0.90 b2 0.95 b4 5.20 5.40 B5 0.30
c 0.45 0.60
c2 0.48 0.60
D 6.00 6.20
E 6.40 6.60
e 2.28 e1 4.40 4.60
H 16.10
L 9.00 9.40 L1 0.80 1.20 L2 0.80 1.00 V1 10°
DocID2146 Rev 20 41/46
46
Packaging mechanical data L78M
P1
A0
D1
P0
F
W
E
D
B0
K0
T
User direction of feed
P2
10 pitches cumulative tolerance on tape +/- 0.2 mm
User direction of feed
R
Bending radius
B1
For machine ref. only including draft and radii concentric around B0
AM08852v1
Top cover tape

9 Packaging mechanical data

Figure 36. Tape for DPAK and D2PAK

42/46 DocID2146 Rev 20
L78M Packaging mechanical data
A
D
B
Full radius
G measured at hub
C
N
REEL DIMENSIONS
40mm min.
Access hole
At sl ot location
T
Tape slot in core for tape start 25 mm min. width
AM08851v2

Figure 37. Reel for DPAK and D2PAK

Table 24. DPAK and D
2
PAK tape and reel mechanical data
Tape Reel
Dim.
mm
Dim.
mm
Min. Max. Min. Max.
A0 6.8 7 A 330 B0 10.4 10.6 B 1.5 B1 12.1 C 12.8 13.2
D 1.5 1.6 D 20.2
D1 1.5 G 16.4 18.4
E 1.65 1.85 N 50
F 7.4 7.6 T 22.4 K0 2.55 2.75 P0 3.9 4.1 Base qty. 2500 P1 7.9 8.1 Bulk qty. 2500 P2 1.9 2.1
R40
T 0.25 0.35
W 15.7 16.3
DocID2146 Rev 20 43/46
46
Order codes L78M

10 Order codes

TO-220
(single gauge)
L78M05ABV L78M05ABV-DG L78M05ABDT-TR 5 V
L78M05CV L78M05CV-DG L78M05CP L78M05CDT-TR L78M05CDT-1 5 V
L78M08CV L78M08CV-DG L78M08CDT-TR 8 V
L78M09CV L78M09CV-DG L78M09CDT-TR 9 V
L78M12CV L78M12CV-DG L78M12CDT-TR 12 V
L78M15ABV L78M15ABV-DG L78M15ABDT-TR 15 V
TO-220
(dual gauge)

Table 25. Order codes

Order codes
TO-220FP DPAK IPAK
L78M05ACDT-TR
L78M06ABDT-TR 6 V
L78M06CDT-TR 6 V
L78M08ABDT-TR 8 V
L78M09ABDT-TR 9 V
L78M10ABDT-TR 10 V L78M12ABDT-TR 12 V L78M12ACDT-TR 12 V
Output
voltages
L78M15CV L78M15CV-DG L78M15CDT-TR 15 V
L78M24ABDT-TR 24 V L78M24ACDT-TR 24 V
L78M24CV L78M24CV-DG L78M24CDT-TR 24 V
44/46 DocID2146 Rev 20
L78M Revision history

11 Revision history

Table 26. Document revision history

Date Revision Changes
21-Jun-2004 6 Document updating. 30-Aug-2006 7 Order codes updated. 29-Nov-2006 8 DPAK mechanical data updated and add footprint data.
06-Jun-2007 9 Order codes updated. 10-Dec-2007 10 Added Table 25. 19-Feb-2008 11 Modified: Table 25 on page 44.
15-Jul-2008 12 Modified: Table 25 on page44 and Table 26 on page 45.
07-Apr-2009 13 Modified: Figure 9 on page 22 and Figure 15 on page 23.
14-Jun-2010 14
11-Nov-2010 15 Modified: R
08-Feb-2012 16
09-Mar-2012 17 Added: order codes L78M08CV-DG and L78M09CV-DG Table 25 on page 44. 15-May-2012 18 Added: order codes L78M24CV-DG Table 25 on page 44.
19-Apr-2013 19 Removed: Available on request footnote 2 Table 25 on page 44.
04-Jun-2014 20
Added: Table 18 on page 26, Figure 29 on page 27, Figure 30 on page 28,
Figure 31 and Figure 32 on page 29.
value for TO-220 Table 2 on page 5.
thJC
Added: order codes L78M05CV-DG, L78M12CV-DG and L78M15CV-DG
Table 25 on page 44.
Part numbers L78MxxAB, L78MxxAC and L78MxxC changed to L78M. Updated the title and the features in cover page. Cancelled Table 1.Device summ ary. Updated Section 3: Maximum ratings, Section 5: Electrical characteristics,
Section 6: Typical performance and Section 8: Package mechanical data.
Added Section 7: Applications information and Section 9: Packaging
mechanical data.
Minor text changes.
DocID2146 Rev 20 45/46
46
L78M
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