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MIC2954-03BT PDF预览

MIC2954-03BT

更新时间: 2024-11-21 22:25:27
品牌 Logo 应用领域
麦瑞 - MICREL 线性稳压器IC调节器电源电路输出元件局域网
页数 文件大小 规格书
12页 173K
描述
250mA Low-Dropout Regulator

MIC2954-03BT 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SFM包装说明:TO-220, 3 PIN
针数:3Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.34Is Samacsys:N
可调性:FIXED最大回动电压 1:0.6 V
标称回动电压 1:0.375 V最大绝对输入电压:60 V
最大输入电压:30 V最小输入电压:6 V
JESD-30 代码:R-XSFM-T3JESD-609代码:e0
最大电网调整率:0.4%最大负载调整率:0.015%
功能数量:1输出次数: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 1:5.12 V最小输出电压 1:4.88 V
标称输出电压 1:5 V封装主体材料:UNSPECIFIED
封装代码:TO-220封装等效代码:SIP3,.1TB
封装形状:RECTANGULAR封装形式:FLANGE MOUNT
峰值回流温度(摄氏度):240认证状态:Not Qualified
调节器类型:FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR子类别:Other Regulators
表面贴装:NO技术:BIPOLAR
端子面层:Tin/Lead (Sn85Pb15)端子形式:THROUGH-HOLE
端子节距:2.54 mm端子位置:SINGLE
处于峰值回流温度下的最长时间:30最大电压容差:2.4%
Base Number Matches:1

MIC2954-03BT 数据手册

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MIC2954  
250mA Low-Dropout Regulator  
General Description  
Features  
TheMIC2954isabulletproofefficientvoltageregulatorwith  
very low dropout voltage (typically 40mV at light loads and  
375mV at 250mA), and low quiescent current (120µA typi-  
cal). The quiescent current of the MIC2954 increases only  
slightly in dropout, thus prolonging battery life. Key MIC2954  
features include protection against reversed battery, fold-  
back current limiting, and automotive load dump protection  
(60V positive transient).  
• High-accuracy 5V, guaranteed 250mA output  
• Low quiescent current  
• Low dropout voltage  
• Extremely tight load and line regulation  
• Very low temperature coefficient  
• Current and thermal limiting  
• Input can withstand –20V reverse battery and  
+60V positive transients  
• Error flag warns of low output voltage  
• Logic-controlled electronic shutdown  
• Output programmable from 1.24V to 29V  
(MIC2954-07/08)  
• Available in TO-220, TO-92, and surface-mount  
SOT-223 and SOP-8 packages  
TheMIC2954-07/08BMisanadjustableversionthatincludes  
an error flag output that warns of a low output voltage, which  
is often due to failing batteries on the input. This may also be  
usedasapower-onreset. Alogic-compatibleshutdowninput  
isprovidedwhichenablestheregulatortobeswitchedonand  
off. This part may be pin-strapped for 5V output, or pro-  
grammed from 1.24V to 29V with the use of two external  
resistors.  
Applications  
• Battery powered equipment  
• Cellular telephones  
The MIC2954 is available in two voltage tolerances, ±0.5%  
maximum and ±1% maximum. Both are guaranteed for  
junction temperatures from –40°C to +125°C.  
• Laptop, notebook, and palmtop computers  
• PCMCIA V and V regulation/switching  
CC  
PP  
The MIC2954 has a very low output voltage temperature  
coefficient and extremely good load and line regulation  
(0.04% typical).  
• Bar code scanners  
• Automotive electronics  
• SMPS post-regulator/dc-to-dc modules  
• Voltage reference  
• High-efficiency linear power supplies  
Typical Applications  
100k  
VERR  
VOUT  
1.2V to 30V  
MIC2954  
MIC2954  
VIN  
VOUT  
VIN  
8
3
1
5
7
IN  
OUT  
GND  
IN  
OUT  
R1  
R2  
SHDN ERR  
SHUTDOWN  
ENABLE  
FB  
2.2µF  
10µF  
GND  
100pF  
4
VREF  
R1  
R2  
VOUT = VREF 1+  
2, 6 = OPEN  
5V Fixed Regulator  
Adjustable Regulator  
VIN  
+7V  
VOUT  
5V or 3.3V  
MIC2954-07/-08  
100pF  
8
1
5
7
IN  
OUT  
MIC2954-07/-08  
300k  
3
V
OUT VIN*  
VIN  
SHDN ERR  
8
1
5
7
1%  
SHUTDOWN  
ENABLE  
IN  
OUT  
FB  
3.3µF  
* MINIMUM INPUT-TO-OUTPUT  
VOLTAGE RANGES FROM  
40mV TO 400mV DEPENDING  
UPON LOAD CURRENT  
3
SHDN ERR  
GND  
SHUTDOWN  
ENABLE  
220k  
1%  
180k  
1%  
4
FB  
GND  
5V  
3.3V  
470k  
4
Q1  
2N2222  
Q1 ON = 3.3V  
Q1 OFF = 5.0V  
Wide Input-Voltage-Range Current Limiter  
5V or 3V Selectable Regulator with Shutdown  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
August 1999  
1
MIC2954  

MIC2954-03BT 替代型号

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