SPX2954AM3-L-5-0 Exar Corporation, SPX2954AM3-L-5-0 Datasheet - Page 11

• Manufacturer Part Number: SPX2954AM3-L-5-0
• Description: 250mA Low Dropout Voltage Regulator
• Manufacturer: Exar Corporation

Specifications of SPX2954AM3-L-5-0

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: Up to 30V
• Voltage - Dropout (typical): 0.31V @ 250mA
• Number Of Regulators: 1
• Current - Output: 250mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-261-4, TO-261AA, SOT-223-4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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)