L7805CV.pdf 데이터시트 (총 30 페이지) - 파일 다운로드 L7805CV 데이타시트 다운로드

No Preview Available !

L78
Datasheet
Positive voltage regulator ICs
TO-220
DPAK
TO-220FP
D²PAK
Features
• Output current up to 1.5 A
• Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 V
• Thermal overload protection
• Short circuit protection
• Output transition SOA protection
• 2 % output voltage tolerance (A version)
• Guaranteed in extended temperature range (A version)
Description
The L78 series of three-terminal positive regulators is available in TO-220,
TO-220FP, D²PAK and DPAK 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 embeds internal current
limiting, thermal shut-down and safe area protection, making it essentially
indestructible. If adequate heat sinking is provided, they can deliver over 1 A output
current. Although designed primarily as fixed voltage regulators, these devices can
be used with external components to obtain adjustable voltage and currents.
Maturity status link
L78
DS0422 - Rev 35 - May 2018
For further information contact your local STMicroelectronics sales office.
www.st.com

No Preview Available !

1 Diagram
Figure 2. Block diagram
L78
Diagram
GAMG220920161000MT
DS0422 - Rev 35
page 2/55

No Preview Available !

2 Pin configuration
Figure 3. Pin connections (top view)
L78
Pin configuration
TO-220
TO-220FP
D²PAK
Figure 4. Schematic diagram
DPA K
GAMG220920161001MT
DS0422 - Rev 35
GAMG220920161002MT
page 3/55

No Preview Available !

L78
Maximum ratings
3 Maximum ratings
Symbol
VI
IO
PD
TSTG
TOP
Table 1. Absolute maximum ratings
Parameter
DC input voltage
for VO= 5 to 18 V
for VO= 20, 24 V
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
for L78xxC, L78xxAC
for L78xxAB
Value
35
40
Internally limited
Internally limited
-65 to 150
0 to 125
-40 to 125
Unit
V
°C
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional
operation under these condition is not implied.
Symbol
RthJC
RthJA
Table 2. Thermal data
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
D²PAK
3
62.5
DPAK
8
100
TO-220
5
50
TO-220FP
5
60
Unit
°C/W
°C/W
Figure 5. Application circuits
DS0422 - Rev 35
GAMG220920161003MT
page 4/55

No Preview Available !

4 Test circuits
Figure 6. DC parameter
L78
Test circuits
Figure 7. Load regulation
GAMG220920161004MT
Figure 8. Ripple rejection
GAMG220920161005MT
DS0422 - Rev 35
GAMG220920161006MT
page 5/55