Datasheet L78M24ACDT, L78M24ABV, L78M24ABDT, L78M12ABV, L78M20ABV Datasheet (SGS Thomson Microelectronics)

...
L78M00AB/AC
SERIES
March1997
PRECISION 500mA REGULATORS
.OUTPUT CURRENT UP TO 0.5A
.OUTPUT VOLTAGES OF 5; 6; 8; 9: 10; 12; 15;
18; 20; 24V
.SHORT CIRCUIT PROTECTION
.OUTPUT TRANSISTORS SOAPROTECTION
.± 2% OUTPUTVOLTAGETOLERANCE
.GUARANTEED IN EXTENDED TEMPERA-
TURERANGES
DESCRI PTIO N
The L78M00AB series of three-therminal positive regulators is available in TO-220 and DPAK 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 employsinternalcurrentlimiting,thermalshut-down and safe area protection, making it essentially indestructible.If adequate heat sinking is provided, they can deliver over 0.5A output current. Although designed primarily asfixedvoltageregulators,these devices can be used with external components to obtainadjustable voltages and currents.
TO-220
BLOCK DIAGRAM
1
3
DPAK
(TO-252)
1/15
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
i
DC Input Voltage (for Vo= 5 to 18V)
(for Vo= 20, 24V)
35 40
V V
I
o
Output Current Internally Limited
P
tot
Power Dissipation Internally Limited
T
stg
Storage Temperature -65 to 150
o
C
T
j
Operating Junction Temperature for L78M00AC
L78M00AB
0 to 125
-40 to 125
o
C
o
C
THERMAL DATA
TO-220 DPAK
R
thj-case
R
thj-amb
Thermal Resistance Junction-case MAX Thermal Resistance Junction-ambient MAX
3
50
8
100
o
C/W
o
C/W
CONN E CTION DI A G RAM AND ORDE R C O DES (top view)
Order Codes Output Voltage
0 to 125 oC -40 to 125 oC
DPAK TO-220 DPAK
L78M05ACDT L78M05ABV L78M05ABDT 5V L78M06ACDT L78M06ABV L78M06ABDT 6V L78M08ACDT L78M08ABV L78M08ABDT 8V L78M09ACDT L78M09ABV L78M09ABDT 9V L78M10ACDT L78M10ABV L78M10ABDT 10V L78M12ACDT L78M12ABV L78M12ABDT 12V L78M15ACDT L78M15ABV L78M15ABDT 15V L78M18ACDT L78M18ABV L78M18ABDT 18V L78M20ACDT L78M20ABV L78M20ABDT 20V L78M24ACDT L78M24ABV L78M24ABDT 24V
TO - 220 DPAK
L78M00AB/AC SERIES
2/15
APPLICATION CIRCUIT
SCHEM ATIC DIA GRA M
L78M00AB/AC SERIES
3/15
TEST CIRCUITS Figure 1 : DC Parameters. Figure 2 : Load Regulation.
Figure 3 : Ripple Rejection.
L78M00AB/AC SERIES
4/15
ELECTRICAL CHARACTERISTICS FOR L78M05XX (refer to the test circuits, Vi= 10V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 4.9 5 5.1 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 7 to 20 V
4.8 5 5.2 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 7 to 25 V Vi= 8 to 25 V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
I
o
= 5 to 200 mA Tj=25oC
100
50
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 8 to 25 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -0.5 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC40µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi= 8 to 18 V
62 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 300 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
ELECTRICAL CHARACTERISTICS FOR L78M06XX (refer to the test circuits, Vi= 11V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 5.88 6 6.12 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 8 to 21 V
5.75 6 6.3 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 8 to 25 V Vi= 9 to 25 V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
Io= 5 to 200 mA Tj=25oC
120
60
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 9 to 25 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -0.5 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC45µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi= 9 to 19 V
59 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 270 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
L78M00AB/AC SERIES
5/15
ELECTRICAL CHARACTERISTICS FOR L78M08XX (refer to the test circuits, Vi= 14V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 7.84 8 8.16 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 10.5 to 23 V
7.7 8 8.3 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 10.5 to 25 V Vi=11to25V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
I
o
= 5 to 200 mA Tj=25oC
160
80
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 10.5 to 25 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -0.5 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC52µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi= 11.5 to 21.5 V
56 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 250 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
ELECTRICAL CHARACTERISTICS FOR L78M09XX (refer to the test circuits, Vi= 15V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 8.82 9 9.18 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 11.5 to 24 V
8.64 9 9.36 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 11.5 to 25 V Vi=12to25V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
Io= 5 to 200 mA Tj=25oC
180
90
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 11.5 to 25 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -0.5 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC52µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi= 12.5 to 23 V
56 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 250 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
L78M00AB/AC SERIES
6/15
ELECTRICAL CHARACTERISTICS FOR L78M10XX (refer to the test circuits, Vi= 16V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 9.8 10 10.2 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 12.5 to 25 V
9.6 10 10.4 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 12.5 to 30 V Vi=13to30V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
I
o
= 5 to 200 mA Tj=25oC
200 100
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 12.5 to 30 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -0.5 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC64µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi= 13.5 to 24 V
56 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 245 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
ELECTRICAL CHARACTERISTICS FOR L78M12XX (refer to the test circuits, Vi= 19V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 11.75 12 12.25 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 14.5 to 27 V
11.5 12 12.5 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 14.5 to 30 V Vi=16to30V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
Io= 5 to 200 mA Tj=25oC
240 120
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 14.5 to 30 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -1 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC75µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi=15to25V
55 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 240 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
L78M00AB/AC SERIES
7/15
ELECTRICAL CHARACTERISTICS FOR L78M15XX (refer to the test circuits, Vi= 23V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 14.7 15 15.3 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi=17to30V
14.4 15 15.6 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi= 17.5 to 30 V Vi=20to30V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
I
o
= 5 to 200 mA Tj=25oC
300 150
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 17.5 to 30 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -1 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC90µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi= 18.5 to 28.5 V
54 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 240 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
ELECTRICAL CHARACTERISTICS FOR L78M18XX (refer to the test circuits, Vi= 26V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 17.64 18 18.36 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi= 20.5 to 33 V
17.3 18 18.7 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi=21to33V Vi=24to33V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
Io= 5 to 200 mA Tj=25oC
360 180
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 21 to 33 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -1.1 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC 100 µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi=22to32V
53 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 240 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
L78M00AB/AC SERIES
8/15
ELECTRICAL CHARACTERISTICS FOR L78M20XX (refer to the test circuits, Vi= 29V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 19.6 20 20.4 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi=23to35V
19.2 20 20.8 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi=23to35V Vi=24to35V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
I
o
= 5 to 200 mA Tj=25oC
400 200
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 23 to 35 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -1.1 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC 110 µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi=24to34V
53 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 240 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
ELECTRICAL CHARACTERISTICS FOR L78M24XX (refer to the test circuits, Vi= 33V, Io= 350 mA, Ci= 0.33 µF, Co= 0.1 µF, Tj= -40 to 125oC (AB), Tj= 0 to 125oC (AC) unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage Tj=25oC 23.5 24 24.5 V
V
o
Output Voltage Io= 5 mA to 350 mA
Vi=27to38V
23 24 25 V
V
o
Line Regulation Io= 200 mA Tj=25oC
Vi=27to38V Vi=28to38V
100
30
mV mV
V
o
Load Regulation Io= 5 to 500 mA Tj=25oC
Io= 5 to 200 mA Tj=25oC
480 240
mV mV
I
d
Quiescent Current Tj=25oC6mA
I
d
Quiescent Current Change Io= 5 to 350 mA 0.5 mA
I
d
Quiescent Current Change Io = 200 mA Vi= 27 to 38 V 0.8 mA
V
o
T
Output Voltage Drift Io= 5 mA -1.2 mV/oC
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC 170 µV
SVR Supply Voltage Rejection Io = 300 mA f = 120 Hz T
j
=25oC
Vi=28to38V
50 dB
V
d
Dropout Voltage Tj=25oC2V
I
sc
Short Circuit Current Tj=25oCVi= 35 V 240 mA
I
scp
Short Circuit Peack Current Tj=25oC 700 mA
L78M00AB/AC SERIES
9/15
Figure 6 : PeakOutput Current vs. Input-Output
Differential Voltage.
Figure 7 : Output Voltage vs. Junction Tempera-
ture.
Figure8 : SupplyVoltage Rejectionvs. Frequen-
cy.
Figure 9 : Quiescent Currentvs. Junction Tempe-
rature.
Figure 4 : Dropout Voltage vs. Junction Tempera-
ture.
Figure 5 : Dropout Characteristics.
L78M00AB/AC SERIES
10/15
Figure 12 : QuiescentCurrent vs. InputVoltage.
APPLICATIONS INFORMATION
DESIGNCONSIDERATIONS The L78M00AB Series of fixed voltage regulators
aredesigned withThermal OverloadProtection 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 transistoris increased.
In many low current applications, compensation capacitors are not required. However, it is recommended that theregulator inputbe 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 0.33µFor larger tantalum, mylar,orothercapacitor havinglow internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directlyacross the regulators input terminals. Normally good constructiontechniquesshouldbeusedto minimize ground loops and lead resistance drops since the regulator has no externalsense lead.
Figure 10 : Load Transient Response. Figure 11 : Line Transient Response.
L78M00AB/AC SERIES
11/15
Figure 13 : Current Regulator. Figure 14 : Adjustable Output Regulator.
VO, 7.0Vto 20V Vi–VO≥2.0V
Figure 15 : Current Boost Regulator. Figure 16 : Short-circuit Protection.
The addition of an operational amplifier allows ad­justment to higher or intermediate values while re­taining regulation characteristics. The minimum voltage obtainable with this arrangement is 2.0V greater than the regulator voltage.
V
XX
Io=+I
d
R
1
V
BEQ
1
R1=
I
Q
1
I
REQ
β
Q
1
V
BEQ
1
IO=I
REG
+Q1[I
REG
–]
R
1
The circuit of figure 6 can be modified to provide supply protectionagainst short circuits by adding a short-circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short-circuit current of the three-terminal regulator. Therefore, a four-ampere plasticpowertransistor is specified.
L78M00AB/AC SERIES
12/15
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.8 0.189 C 1.37 0.054 D 2.4 2.8 0.094 0.110
D1 1.2 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
F 0.8 1.05 0.031 0.041
F2 1.15 1.4 0.045 0.055
G 4.95 5.08 5.21 0.195 0.200 0.205 H2 10.4 0.409 H3 10.05 10.4 0.396 0.409
L2 16.2 0.638 L3 26.3 26.7 27.1 1.035 1.051 1.067 L5 2.6 3 0.102 0.118 L6 15.1 15.8 0.594 0.622 L7 6 6.6 0.236 0.260
Dia. 3.65 3.85 0.144 0.152
TO-220 MECHANICAL DATA
P011D
L78M00AB/AC SERIES
13/15
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009
B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212
C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023
D 6 6.2 0.236 0.244
E 6.4 6.6 0.252 0.260
G 4.4 4.6 0.173 0.181
H 9.35 10.1 0.368 0.397
L2 0.8 0.031 L4 0.6 1 0.023 0.039
A
C2
C
H
A1
A2
==
D
L2
L4
13
==
B
E
==
B2
G
2
DETAIL”A”
DETAIL”A”
TO-252 (DPAK) MECHANICAL DATA
0068772-B
L78M00AB/AC SERIES
14/15
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No licenseis granted by implication or otherwise under any patentor patentrights of SGS-THOMSONMicroelectronics. Specificationsmentioned in this publication are subject to change withoutnotice. Thispublication supersedes and replacesall informationpreviously supplied. SGS-THOMSONMicroelectronicsproducts are notauthorized for use as criticalcomponents in lifesupport devicesor systems without express writtenapproval ofSGS-THOMSONMicroelectonics.
1997 SGS-THOMSONMicroelectronics - Printedin Italy- All Rights Reserved
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L78M00AB/AC SERIES
15/15
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