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1/34November 2004
■ OUTPUT CURRENT TO 1.5A
■ OUTPUT VOLTAGES OF 5; 5.2; 6; 8; 8.5; 9;
10; 12; 15; 18; 24V
■ THERMAL OVERLOAD PROTECTION
■ SHORT CIRCUIT PROTECTION
■ OUTPUT TRANSITION SOA PROTECTION
DESCRIPTION
The L7800 series of three-terminal positive
regulators is available in TO-220, TO-220FP,
TO-220FM, TO-3 and D
2
PAK 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 employs internal current
limiting, thermal shut-down and safe area
protection, making it essentially indestructible. If
adequate heat sinking is provided, they can
deliver over 1A output current. Although designed
primarily as fixed voltage regulators, these
devices can be used with external components to
obtain adjustable voltage and currents.
L7800
SERIES
POSITIVE VOLTAGE REGULATORS
Figure 1: Schematic Diagram
TO-220
D
2
PAK TO-3
TO-220FP
TO-220FM
Rev. 12
L7800 SERIES
2/34
Table 1: Absolute Maximum Ratings
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
Figure 2: Schematic Diagram
Symbol Parameter Value Unit
V
I
DC Input Voltage for V
O
= 5 to 18V
35
V
for V
O
= 20, 24V
40
I
O
Output Current
Internally Limited
P
tot
Power Dissipation
Internally Limited
T
stg
Storage Temperature Range
-65 to 150 °C
T
op
Operating Junction Temperature
Range
for L7800 -55 to 150
°C
for L7800C 0 to 150
Symbol Parameter
D
2
PAK
TO-220 TO-220FP TO-220FM TO-3 Unit
R
thj-case
Thermal Resistance Junction-case Max
355 54°C/W
R
thj-amb
Thermal Resistance Junction-ambient
Max
62.5 50 60 60 35 °C/W
L7800 SERIES
3/34
Figure 3: Connection Diagram (top view)
Table 3: Order Codes
(*) Available in Tape & Reel with the suffix "-TR".
TYPE
TO-220
(A Type)
TO-220
(C Type)
TO-220
(E Type)
D
2
PAK
(A Type) (*)
D
2
PAK
(C Type)
(T & R)
TO-220FP TO-220FM TO-3
L7805 L7805T
L7805C L7805CV L7805C-V L7805CV1 L7805CD2T L7805C-D2TR L7805CP L7805CF L7805CT
L7852C L7852CV L7852CD2T L7852CP L7852CF L7852CT
L7806 L7806T
L7806C L7806CV L7806C-V L7806CD2T L7806CP L7806CF L7806CT
L7808 L7808T
L7808C L7808CV L7808C-V L7808CD2T L7808CP L7808CF L7808CT
L7885C L7885CV L7885CD2T L7885CP L7885CF L7885CT
L7809C L7809CV L7809C-V L7809CD2T L7809CP L7809CF L7809CT
L7810C L7810CV L7810CD2T L7810CP
L7812 L7812T
L7812C L7812CV L7812C-V L7812CD2T L7812CP L7812CF L7812CT
L7815 L7815T
L7815C L7815CV L7815C-V L7815CD2T L7815CP L7815CF L7815CT
L7818 L7818T
L7818C L7818CV L7818CD2T L7818CP L7818CF L7818CT
L7820 L7820T
L7820C L7820CV L7820CD2T L7820CP L7820CF L7820CT
L7824 L7824T
L7824C L7824CV L7824CD2T L7824CP L7824CF L7824CT
TO-220 (Any Type)
TO-3D
2
PAK (Any Type)
TO-220FP/TO-220FM
L7800 SERIES
4/34
Figure 4: Application Circuits
TEST CIRCUITS
Figure 5: DC Parameter
Figure 6: Load Regulation
L7800 SERIES
5/34
Figure 7: Ripple Rejection
Table 4: Electrical Characteristics Of L7805 (refer to the test circuits, T
J
= -55 to 150°C, V
I
= 10V,
I
O
= 500 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified).
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
O
Output Voltage T
J
= 25°C 4.8 5 5.2 V
V
O
Output Voltage I
O
= 5 mA to 1 A P
O
≤ 15W
V
I
= 8 to 20 V
4.65 5 5.35 V
∆V
O
(*) Line Regulation V
I
= 7 to 25 V T
J
= 25°C 3 50 mV
V
I
= 8 to 12 V T
J
= 25°C 1 25
∆V
O
(*) Load Regulation I
O
= 5 mA to 1.5 A T
J
= 25°C 100 mV
I
O
= 250 to 750 mA T
J
= 25°C 25
I
d
Quiescent Current T
J
= 25°C 6 mA
∆I
d
Quiescent Current Change I
O
= 5 mA to 1 A 0.5 mA
V
I
= 8 to 25 V 0.8
∆V
O
/∆T Output Voltage Drift I
O
= 5 mA 0.6 mV/°C
eN Output Noise Voltage B =10Hz to 100KHz T
J
= 25°C 40 µV/V
O
SVR Supply Voltage Rejection V
I
= 8 to 18 V f = 120Hz 68 dB
V
d
Dropout Voltage I
O
= 1 A T
J
= 25°C 2 2.5 V
R
O
Output Resistance f = 1 KHz 17 mΩ
I
sc
Short Circuit Current V
I
= 35 V T
J
= 25°C 0.75 1.2 A
I
scp
Short Circuit Peak Current T
J
= 25°C 1.3 2.2 3.3 A
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