L78M05AC STMICROELECTRONICS [STMicroelectronics], L78M05AC Datasheet - Page 18
L78M05AC
Manufacturer Part Number
L78M05AC
Description
Precision 500 mA regulators
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.L78M05AC.pdf
(29 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
L78M05ACDT
Manufacturer:
ST
Quantity:
196
Company:
Part Number:
L78M05ACDT-TR
Manufacturer:
STMicroelectronics
Quantity:
36 231
Company:
Part Number:
L78M05ACDT-TR
Manufacturer:
ST
Quantity:
5 288
Part Number:
L78M05ACDT-TR
Manufacturer:
ST
Quantity:
20 000
Figure 19. Current boost regulator
Figure 20. Short-circuit protection
Note:
18/29
R
I
O
1
= I
= ______________
REG
I
REQ
+ Q
The circuit of
adding a short-circuit sense resistor, R
sensing PNP must be able to handle the short-circuit current of the three-terminal regulator.
Therefore, a four-ampere plastic power transistor is specified.
V
-(I
BEQ1
Q1
1
(I
/β
REG
Q1
)
______)
V
BEQ1
R
Figure 19
1
can be modified to provide supply protection against short circuits by
SC
, and an additional PNP transistor. The current