参数资料
| 型号： | SPX2945M3-L-5-0/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V .4A SOT223-3 |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 最高 26V |
| 电压 - 压降（标准）： | 0.36V @ 400mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 400mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223 |
| 包装： | 带卷 (TR) |
SPX2945
400mA Low Dropout Voltage Regulator with Shutdown
FEATURES
■ Output 3.3V, 5.0V at 400mA Output
+V IN
8
+V IN
V OUT
1
1.2V to 20V
+
■ Very Low Quiescent Current, 100 μ A
100K
SPX2945
FB
7
R 1
0.01 μ F
10 μ F
■ Low Dropout Voltage, 420mV at 400mA
■ Extremely Tight Load and Line Regulation
■ Very Low Temperature Coefficient
SHUTDOWN
INPUT
ON
OFF
3
SD
GND
4
______
ERROR
5
R 2
V REF
ERROR
OUTPUT
■ Current & Thermal Limiting
Adjustable Regulator
■ Error Flag Warns Of Output Dropout
■ Logic-Controlled Electronic Shutdown
V IN
IN
OUT
5V
■ Output Programmable From 1.24V to 20V
SPX2945
(for SO-8)
0.1 μ F
+
GND
+
2.2 μ F
5V Regulator Circuit
Now Available in Lead Free Packaging
DESCRIPTION
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.
TO-220-3 (U)
TO-263-3 (T)
TO-263-5 (T5)
TO-252 (R)
8-Pin Surface Mount (S)
SOT-223 (M3)
2
SPX2945
SPX2945
1 3
SPX2945
5 Pin TO-263
SPX2945
1 2 3
V OU
SENS
SHUTDOWN
1 8
SPX2945
2 7
3 6
V IN
FEEDBACK
5V/ 3.3V TAP
SPX2945
1 2 3
1
2
3
1 2 3 4 5
GN
4
5
ERRO
V IN GN
V OU
V IN GN
V OU
V IN GN
V OU
V IN GN
V OU
Note: Tab is Ground
Date: 3/14/06
SPX2945 400mA Low Dropout Voltage Regulator with Shutdown
1
?Copyright 2006 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX2945R | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2945R-3.3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2945R-3-3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:400mA Low Dropout Voltage Regulator with Shutdown |
| SPX2945R-3-3TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:400mA Low Dropout Voltage Regulator with Shutdown |
| SPX2945R-5.0 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:500mA Low Drop Out Voltage Regulator with Shutdown |
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