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AS2954AN-3.3 PDF预览

AS2954AN-3.3

更新时间： 2024-01-23 17:57:55
品牌 Logo 应用领域
西伯斯 - SIPEX /
页数 文件大小 规格书
6页 182K
描述
Fixed Positive LDO Regulator, 3.3V, 0.6V Dropout, PBCY3, TO-92, 3 PIN

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AS2954AN-3.3 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：TO-92, 3 PINReach Compliance Code：unknown
风险等级：5.75Is Samacsys：N
最大回动电压 1：0.6 V最大输入电压：30 V
最小输入电压：6 VJESD-30 代码：O-PBCY-T3
湿度敏感等级：1功能数量：1
端子数量：3工作温度TJ-Max：125 °C
工作温度TJ-Min：-40 °C最大输出电流 1：0.25 A
最大输出电压 1：3.35 V最小输出电压 1：3.251 V
标称输出电压 1：3.3 V封装主体材料：PLASTIC/EPOXY
封装代码：TO-92封装形状：ROUND
封装形式：CYLINDRICAL峰值回流温度（摄氏度）：225
认证状态：Not Qualified调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
表面贴装：NO端子形式：THROUGH-HOLE
端子位置：BOTTOM处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

AS2954AN-3.3 数据手册

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AS2954  
250 mA Low Drop Out Voltage Regulator  
FEATURES  
APPLICATIONS  
• Output Accuracy 5V, 3.3V,@ 250mA Output  
• Very Low Quiescent Current  
• Battery Powered Systems  
• Cordless Telephones  
• Low Dropout Voltage  
• Radio Control Systems  
• Portable/Palm Top/Notebook Computers  
• Portable Consumer Equipment  
• Portable Instrumentation  
• Automotive Electronics  
• SMPS Post-Regulator  
• Extremely Tight Load And Line Regulation  
• Very Low Temperature Coefficient  
• Current & Thermal Limiting  
• Improved Replacement With Hight IOUT For LP2954 Sockets  
• Voltage Reference  
• Avionics  
AS2954 Version Over LP2954  
• Error Flag Warns Of Output Dropout  
• Logic-Controlled Electronic Shutdown  
• Output Programmable From 1.24V to 29V  
• Input Can Withstand -20V Reverse Battery & +60 Positive Transient  
PRODUCT DESCRIPTION  
The AS2954 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 AS2954 features very low quiescent current (75µA Typ.) and  
very low dropout voltage. This includes a tight initial tolerance of 0.5% max and 1% max., and very low output temperature  
coefficient, making the AS2954 useful as a low-power voltage reference. The key AS2954 features include protection against reversed  
battery, fold-back current limiting, and automotive load dump protection (60V positive transient).  
The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries.  
Another feature is the logic compatible shutdown input which enables the regulator to be switched on and off. The AS2954 is offered  
in a 3-pin TO-92and TO-263 package compatible with other 5 volt regulators, in 8-Pin plastic, SO-8, (same pin out as AS2951), TO-  
220 and TO-263.  
The regulator output voltage (of the 8-pin) may be pin-strapped for a 5Vand 3.3V or programmed from 1.24V to 29V with an external  
pair of resistors. Look for AS2951 for 150mA and LP2951 for 100mA applications.  
PIN CONNECTIONS  
TO-263-3 Package  
AS2954  
TO-263-5 Package  
AS2954  
8-Pin Surface Mount (S)  
TO-220-3 Package  
AS2954  
TO-220-5 Packa
SOT-223 Package  
INPUT  
OUTPUT  
1
2
3
4
8
7
6
5
SENSE  
FEEDBACK  
5V, 3.3V TAP  
ERROR  
AS2954  
AS2954  
SHUTDOWN  
GND  
AS2954  
1
2
3
1
2
3
1
2
3
4
5
1)  
INPUT  
1)  
INPUT  
2) OUTPUT  
OUTPUT  
GND  
2)  
3)  
4)  
5)  
3)  
4)  
5)  
GND  
SHUTDOWN  
ERROR  
GND  
V
V
Top View  
TO-92 (N)  
IN  
OUT  
SHUTDOWN  
ERROR  
Front View  
V
VIN  
VOUT  
ADJ  
1
VIN  
2
3
V
1
2
3 4  
5
2
1
3
Top View  
Top View  
GND  
OUT  
Front View  
Front View  
OUTPUT  
INPUT  
GND  
Bottom View  
Rev.9/29/00  
123456

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