SPX2945T5-5.0 Sipex Corporation, SPX2945T5-5.0 Datasheet
SPX2945T5-5.0
Manufacturer Part Number
SPX2945T5-5.0
Description
Manufacturer
Sipex Corporation
Datasheet
1.SPX2945T5-5.0.pdf
(11 pages)
Specifications of SPX2945T5-5.0
Date_code
06
FEATURES
The SPX2945 is a low power voltage regulator. This device is an excellent choice for use in battery-powered
applications such as cordless telephones, radio control systems, and portable computers. The SPX2945
features very low quiescent current (100µA Typ.) and very low dropout voltage. This includes a tight initial
tolerance of 1% max and very low output temperature coefficient, making the SPX2945 useful as a low-
power voltage reference.
The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling
voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the
regulator to be switched on and off. The SPX2945 is offered in 3-pin TO-220 package, SO-8 (same pin
out as SPX2951), SOT-223, surface mount 3-Pin TO-252, 3-Pin TO-263 packages and 5-Pin TO-263.
The regulator output voltage (of the 8-pin SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed
from 1.24V to 20V with an external pair of resistors. Look for SPX2951 for 150mA and SPX2954 for 250mA
applications.
Rev. B Date:01/20/04
Output 3.3V, 5.0V at 400mA Output
Very Low Quiescent Current, 100µA
Low Dropout Voltage, 420mV at 400mA
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Current & Thermal Limiting
Error Flag Warns Of Output Dropout
Logic-Controlled Electronic Shutdown
Output Programmable From 1.24V to 20V
(for SO-8)
400mA Low Dropout Voltage Regulator with Shutdown
TO-220-3 (U)
V
IN
SPX2945
1
GN
2
3
V
®
OU
V
TO-263-3 (T)
1
IN
SPX2945 400mA Low Dropout Voltage Regulator with Shutdown
SPX2945
GN
2
V
3
OU
TO-263-5
1
5 Pin TO-263
SPX2945
2
3
4
(T5)
5
1
V
TO-252 (R)
1
IN
SPX2945
SHUTDOWN
INPUT
ON
5V Regulator Circuit
GN
V
Adjustable Regulator
2
IN
3
V
+V
OU
IN
0.1 µF
SHUTDOWN
100K
OFF
SENS
V
GN
OU
+
8-Pin Surface Mount
3
8
1
2
3
4
SPX2945
SD
+V
IN
IN
SPX2945
8
7
6
5
SPX2945
GND
V
FEEDBACK
5V/ 3.3V TAP
ERRO
GND
(S)
IN
4
©Copyright 2004 Sipex Corporation
______
ERROR
OUT
V
FB
OUT
SPX2945
SOT-223 (M3)
DESCRIPTION
V
SPX2945
1
IN
1
7
GN
5
2
V
3
OU
+
R
R
5V
1
2.2 µF
2
V
REF
0.01µF
1.2V to 20V
ERROR
OUTPUT
10µF
+
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