spx2954am3-l-5-0-tr Exar Corporation, spx2954am3-l-5-0-tr Datasheet - Page 11

• Manufacturer Part Number: spx2954am3-l-5-0-tr
• Description: 250ma Low Dropout Voltage Regulator
• Manufacturer: Exar Corporation

APPLICATIONS HINTS
Figure 7. Open Circuit Detector for 4mA to 20mA
Current Loop
Date: 12/9/05
Figure 6. System Over Temperature Protection
4
AUX SHUTDOW
ON
1N4001
0.1µF
20mA
INPUT
TEMP
SENSOR
OFF
SPX2954
GND
+V
4
IN
8
AS35
-
+
MIN VOLTAGE = 4V
V
3
OUT
FB
1N457
SD
7
1
GND
SPX2954, 250mA Low Dropout Voltage Regulator
SPX2954
4
+V
+V
IN
8
IN
2
360K
4.7mA
Ω
_______
ERROR
FB
+5V
V
7
8.2K
OUTPUT
OUT
Ω
5
1
11
10K
5 DEGREE SHUTDOWN FLAG
Figure 8. 300mA Regulator with 0.75V
Ω
UNREGULATED INPUT
.
.
EXTERNAL CIRCUIT
PROTECTED FROM
OVER TEMPERATURE
(V+ GOES OFF WHEN
TEMP > 125)
8
6
V
IN
TAP
FB
7
SPX2954
GND
SENSE
4
V
OUT
© Copyright 2005 Sipex Corporation
1
2
27kΩ
OR
330kΩ
+
4.7µF
LOAD
50mA
TO
300 mA
5V
OUTPUT
RELAY
2N5432
(2)