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參數資料
| 型號： | SPX2946U5-3.3 |
| 英文描述： | 500mA Low Drop Out Voltage Regulator with Shutdown |
| 中文描述： | 500mA的低壓差與關斷穩(wěn)壓器 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 101K |
| 代理商： | SPX2946U5-3.3 |
1
Rev. B Date:01/20/04
SPX2945 400mA Low Dropout Voltage Regulator with Shutdown
Copyright 2004 Sipex Corporation
SPX2945
DESCRIPTION
FEATURES
■
Output 3.3V, 5.0V at 400mA Output
■
Very Low Quiescent Current, 100
μ
A
■
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)
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 (100
μ
A 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.
400mA Low Dropout Voltage Regulator with Shutdown
TO-220-3 (U)
1
2
3
V
IN
V
OU
GN
SPX2945
1
3
2
5
4
SPX2945
5 Pin TO-263
E
V
I
G
V
O
S
1
3
2
SOT-223 (M3)
V
IN
GN
V
OU
SPX2945
2
1
3
4
8
7
6
5
8-Pin Surface Mount
V
OU
SENS
SHUTDOWN
GN
V
IN
FEEDBACK
5V/ 3.3V TAP
ERRO
SPX2945
TO-252 (R)
1
2
3
V
IN
V
OU
GN
SPX2945
TO-263-5
V
IN
TO-263-3 (T)
V
OU
GN
SPX2945
3
2
1
(S)
(T5)
100K
ERROR
______
SD
V
OUT
GND
FB
+V
IN
0.01
μ
F
3
8
1
4
7
SHUTDOWN
SPX2945
OFF
ON
+V
IN
5
10
μ
F
V
REF
R
2
R
1
+
ERROR
OUTPUT
1.2V to 20V
+
2.2
μ
F
+
SPX2945
V
IN
5V
IN
GND
OUT
0.1
μ
F
Adjustable Regulator
5V Regulator Circuit
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| SPX2946U5-5.0 | 500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2946T3-5.0 | 500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2946T5-3.3 | 500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2946T5-5.0 | 500mA Low Drop Out Voltage Regulator with Shutdown |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SPX2946U5-5.0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2947S | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2947T3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2947T5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2947U3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
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