MIC2937A-3.3BU

Series: -
Regulator Topology: Positive Fixed
Number of Regulators: 1
Current - Limit (Min): -
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 125°C
Voltage - Output: 3.3V
Packaging: Tube
Package / Case: TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Manufacturer: Micrel Inc
Supplier Device Package: TO-263-3
Voltage - Input: Up to 26V
Voltage - Dropout (Typical): 0.37V @ 750mA
Current - Output: 750mA


Features:

• High output voltage accuracy
• Guaranteed 750mA 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 output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24V to 26V(MIC29372)
• Available in TO-220, TO-263, TO-220-5, and TO-263-5 packages.


Application

• Battery Powered Equipment
• Cellular Telephones
• Laptop, Notebook, and Palmtop Computers
• PCMCIA VCC and VPP Regulation/Switching
• Bar Code Scanners
• Automotive Electronics
• SMPS Post-Regulator/ DC to DC Modules
• High Efficiency Linear Power Supplies


Pinout




Specifications

Power Dissipation (Note 1)...............................................Internally Limited
Lead Temperature (Soldering, 5 seconds).........................................260°C
Storage Temperature Range.............................................65°C to +150°C
Operating Junction Temperature Range ..........................40°C to +125°C
TO-220 _JC ....................................................................................2.5°C/W
TO-263 _JC ....................................................................................2.5°C/W
Input Supply Voltage..............................................................20V to +60V
Operating Input Supply Voltage..................................................2V† to 26V
Adjust Input Voltage (Notes 9 and 10).................................1.5V to +26V
Shutdown Input Voltage .......................................................0.3V to +30V
Error Comparator Output Voltage.........................................0.3V to +30V


Description

The MIC2937A family are "bulletproof" efficient voltage regulators with very low dropout voltage (typically 40mV at light loads and 300mV at 500mA), and very low quiescent current (160A typical). The quiescent current of the MIC2937A increases only slightly in dropout, thus prolonging battery life. Key MIC2937A features include protection against reversed battery, fold-back current limiting, and automotive "load dump" protection (60V positive transient).

The MIC2937 is available in several configurations. The MIC2937A-xx devices are three pin fixed voltage regulators with 3.3V, 5V, and 12V outputs available. The MIC29371 is a fixed regulator offering logic compatible ON/OFF switching input and an error flag output. This flag may also be used as a power-on reset signal. A logic-compatible shutdown input is provided on the adjustable MIC29372, which enables the regulator to be switched on and off.

Parameters:

Technical/Catalog Information	MIC2937A-3.3BU
Vendor	Micrel Inc
Category	Integrated Circuits (ICs)
Regulator Type	Single Output
Package / Case	D²Pak, SMD-220, TO-263 (3 leads + tab)
Packaging	Tube
Regulator Topology	Positive Fixed
Current - Output	750mA
Voltage - Output	3.3V
Operating Temperature	-40°C ~ 125°C
Voltage - Input	2 ~ 26 V
Number of Regulators	1
Current - Limit (Min)	2A
Current Short Circuit (Isc)	-
Drawing Number	*
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	MIC2937A 3 3BU MIC2937A33BU