LM2931CT ON Semiconductor, LM2931CT Datasheet - Page 9
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LM2931CT
Manufacturer Part Number
LM2931CT
Description
IC REG LDO 100MA ADJ TO220-5
Manufacturer
ON Semiconductor
Datasheet
1.LM2931AZ-5.0RAG.pdf
(23 pages)
Specifications of LM2931CT
Regulator Topology
Positive Adjustable
Voltage - Output
2.7 ~ 29.5 V
Voltage - Input
Up to 40V
Voltage - Dropout (typical)
0.16V @ 100mA
Number Of Regulators
1
Current - Output
100mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
Other names
LM2931CTOS
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2931CT
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM2931CT/NOPB
Manufacturer:
TINS
Quantity:
20 000
≥ 6.0 V
The LM2931 series can be current boosted with a PNP transistor. The
D45VH7, on a heatsink, will provide an output current of 5.0 A with an input
to output voltage differential of approximately 1.0 V. Resistor R in
conjunction with the V
begins conducting. This circuit is not short circuit proof.
Input
V
in
C
0.1
in
68
Figure 19. (5.0 A) Low Differential
Figure 17. Fixed Output Regulator
R
D45VH7
+
Input
BE
Voltage Regulator
100
of the PNP determines when the pass transistor
LM2931-5.0
I
B
Output
Fixed
LM2931-5.0
6.4 V to 30 V
GND
Input
Figure 21. Constant Intensity Lamp Flasher
100
Output
+
100
+
C
5.0 V @ 5.0 A
O
LM2931C
Output
http://onsemi.com
V
out
33 k
9
Input
2.0 k
8.2 k
V
in
The circuit of Figure 19 can be modified to provide supply protection against
short circuits by adding the current sense resistor R
transistor. The current sensing PNP must be capable of handling the short
circuit current of the LM2931. Safe operating area of both transistors must be
considered under worst case conditions.
0.1
V out + V
C
R
6.2 V
in
0
Figure 20. Current Boost Regulator with
Figure 18. Adjustable Output Regulator
100
51 k
Switch Position 1 = Output “On", 2 = Output “Off"
f
osc
2
1
ref
= 2.2 Hz
+
#345
CM
Short Circuit Projection
1 )
Output
Inhibit
R
SC
Input
R 2
R 1
) I
I
Adjustable
LM2931C
B
Output
+
Adj
GND
100
R 2
Output
Adjust
LM2931-5.0
SC
22.5 k w
I
and an additional PNP
Adj
R
R
R 1 ) R 2
1
2
R 1 R 2
100
C
O
+
Output
V
out