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MIC29310BT

更新时间： 2024-11-22 12:59:43
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麦瑞 - MICREL 稳压器
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MIC29310BT 数据手册

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MIC29310/29312  
3A Fast-Response LDO Regulator  
General Description  
Features  
The MIC29310 and MIC29312 are low cost versions of  
MIC29300 family low-dropout (LDO) regulators. Manufac-  
tured on Micrel’s proprietary Super beta PNP™ process, the  
MIC29310/2 is a 3A LDO regulator with very low-dropout  
voltage (600mV over the full load) and low ground current.  
Along with a total accuracy of ±2% (over temperature, line  
and load regulation) these regulators feature very fast tran-  
sient recovery from input voltage surges and output load  
current changes.  
• Low cost versions of MIC29300 family  
• Fast transient response  
• 3A current over full temperature range  
• 600mV dropout voltage at full load  
• Low ground current  
• Accurate 1% guaranteed tolerance  
• “Zero” current shutdown mode (MIC29312)  
• Fixed voltage and adjustable versions  
Applications  
• Processor peripheral and I/O supplies  
• PC add-in cards  
• High-efficiency “green” computer systems  
• High-efficiency linear power supplies  
• High-efficiency switching supply post regulator  
• Battery-powered equipment  
The MIC29310 is available in fixed 3.3V and 5V outputs  
voltages; the MIC29312 has an adjustable output which can  
be set by two external resistors to a voltage between 1.24V  
to 15V. In addition, all versions are fully protected against  
overcurrent faults, reversed input polarity, reversed lead  
insertion, and overtemperature operation.  
A TTL logic enable (EN) pin is available in the MIC29312 to  
shutdown the regulator. When not used, the device can be  
set to continuous operation by connecting EN to the input  
(IN).  
The MIC29310/2 is available in the standard 3- and 5-pin  
TO-220 and TO-263 packages with an operating junction  
temperature range of 0°C to +125°C.  
Ordering Information  
For applications requiring even lower dropout  
voltage, input voltage greater than 16V, or an  
error flag, see the MIC29300/29301/29302/  
29303.  
Part Number  
Voltage Junction Temp. Range  
Package  
TO-220-3  
MIC29310-3.3BT  
MIC29310-3.3BU  
MIC29310-5.0BT  
MIC29310-5.0BU  
MIC29312BT  
3.3V  
3.3V  
5.0V  
5.0V  
Adj.  
0°C to +125°C  
0°C to +125°C  
0°C to +125°C  
0°C to +125°C  
0°C to +125°C  
0°C to +125°C  
TO-263-3  
TO-220-3  
TO-263-3  
TO-220-5  
TO-263-5  
MIC29312BU  
Adj.  
Typical Application  
MIC29312  
On  
Off  
VOUT  
OUT  
EN  
IN  
R1*  
R2*  
VIN  
ADJ  
VIN  
VOUT  
GND  
IN  
OUT  
GND  
R1  
VOUT = 1.24
+ 1  
2  
* For best performance, total series resistance  
(R1 + R2) should be small enough to pass  
the minimum regulator load current of 10mA.  
Fixed Regulator Configuration  
Adjustable Regulator Configuration  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
July 1999  
1
MIC29310/29312  
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