LP2950ACDT-3RKG ON Semiconductor, LP2950ACDT-3RKG Datasheet - Page 12

• Manufacturer Part Number: LP2950ACDT-3RKG
• Description: IC REG LDO LP 100MA 3V DPAK-4
• Manufacturer: ON Semiconductor

Specifications of LP2950ACDT-3RKG

• Regulator Topology: Positive Fixed
• Voltage - Output: 3V
• Voltage - Input: Up to 30V
• Voltage - Dropout (typical): 0.35V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-252-2, DPak (2 Leads + Tab), TO-252AA, SC-63
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Other names: LP2950ACDT-3RKG; LP2950ACDT-3RKGOSTR

2N3906
Q1
2.7 M
330 k
D4
NC
5
3
5
3
Error
SD
Error
SD
Figure 25. Regulator with Early Warning and Auxiliary Output
LP2951CN
LP2951CN
GND
27 k
GND FB
Error
Flag
4
4
+V
#1
#2
V
V
20 k
2N3906
in
in
in
8
8
FB
V
V
SNS
SNS
V
V
O
O
out
4.7 M
out
7
7
Current Limit
Section
T
T
680
0.033 mF
V
For 5.0 V output, use internal resistors. Wire Pin 6 to 7,
and wire Pin 2 to +V
Figure 26. 2.0 A Low Dropout Regulator
220
out
2
6
2N3906
2
6
1
1
= 1.25V (1.0 + R1/R2)
D3
D1
5
3
Error
SD
LP2951CN
GND FB
1.0 mF
Main
Output
1.0 mF
http://onsemi.com
4
D2
Early Warning
V
in
8
Reset
V
V
SNS
V
O
out
10 k
DD
out
7
T
20
470
Bus.
3.6 V
NiCad
12
mP
Memory
V+
2
6
1
.01 mF
.33 mF
NC
NC
+V
47
All diodes are 1N4148.
Early Warning flag on low input voltage.
Main output latches off at lower input voltages.
Battery backup on auxiliary output.
Operation: Regulator #1’s V
diode drop above 5.0 V. Its error flag becomes active
when V
error flag of regulator #2 becomes active and via Q1
latches the main output “off”. When V
5.7 V, regulator #1 is back in regulation and the early
warning signal rises, unlatching regulator #2 via D3.
MJE2955
R1
in
0.05
4.7 mF
R2
Tant
in
< 5.7 V. When V
1000 mF
V
out
@ 2.0 A
100 mF
in
out
drops below 5.3 V, the
is programmed one
in
again exceeds