MIC2941AWU Micrel Inc, MIC2941AWU Datasheet

IC REG LDO 1.25A ADJ TO-263-5

MIC2941AWU

Manufacturer Part Number
MIC2941AWU
Description
IC REG LDO 1.25A ADJ TO-263-5
Manufacturer
Micrel Inc
Datasheet
1.MIC2941AWU_TR.pdf (11 pages)

Specifications of MIC2941AWU

Regulator Topology
Positive Adjustable
Voltage - Output
1.24 ~ 26 V
Voltage - Input
2 ~ 26 V
Voltage - Dropout (typical)
0.4V @ 1.25A
Number Of Regulators
1
Current - Output
1.25A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-5, D²Pak (5 leads + Tab), TO-263BA
Primary Input Voltage
60V
Output Voltage Adjustable Range
1.24V To 26V
Output Voltage Fixed
26V
Dropout Voltage Vdo
350µV
No. Of Pins
5
Output Current
1.25A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
576-3370-5
MIC2941AWU

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Company
Part Number
Manufacturer
Quantity
Price
Company:
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Part Number:
MIC2941AWU
Manufacturer:
MICREL
Quantity:
5
Company:
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Part Number:
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Manufacturer:
MICREL/麦瑞
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Company:
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Part Number:
MIC2941AWU TR
Manufacturer:
MICREL
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Company:
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Part Number:
MIC2941AWU-TR
Manufacturer:
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Quantity:
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General Description
The MIC2940A and MIC2941A are “bulletproof” efficient
voltage regulators with very low dropout voltage (typically
40mV at light loads and 350mV at 1A), and low quiescent
current (240µA typical). The quiescent current of the
MIC2940A increases only slightly in dropout, thus
prolonging battery life. Key MIC2940A features include
protection against reversed battery, fold-back current
limiting, and automotive “load dump” protection (60V
positive transient).
The MIC2940 is available in both fixed voltage (3.3V, 5V,
and 12V) and adjustable voltage configurations. The
MIC2940A-xx devices are three pin, fixed voltage
regulators. A logic-compatible shutdown input is provided
on the adjustable MIC2941A, which enables the regulator
to be switched on and off.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Pin Configuration
July 2007
(MIC2940A-xxBT/WT)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
TO-220-3
1
2
3
MIC2940A Pinout
1) Input
2) Ground
3) Output
The TAB is Ground on TO-220 and TO-263 packages
(MIC2940A-xxBU/WU)
TO-263-3
1
2
3
MIC2941A Pinout
1) Adjust
2) Shutdown
3) Ground
4) Input
5) Output
Features
• High output voltage accuracy
• Guaranteed 1.25A 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
• Logic-controlled electronic shutdown
• Output programmable from 1.24V to 26V(MIC2941A)
• Available in TO-220, TO-263, TO-220-5, and TO-263-5
Applications
• 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
• Voltage reference
• High efficiency linear power supplies
408
positive transients
packages.
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
(MIC2941ABU/WU)
1.2A Low-Dropout Voltage Regulator
TO-263-5
1
2 3
MIC2940A/2941A
4 5
(MIC2941ABT/WT)
TO-220-5
1 2 3 4 5
M9999-071307

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MIC2941AWU Summary of contents

Page 1

... Ground TO-220-3 3) Output (MIC2940A-xxBT/WT) The TAB is Ground on TO-220 and TO-263 packages Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( July 2007 Features • High output voltage accuracy • Guaranteed 1.25A output • Low quiescent current • ...

Page 2

... MIC2940A-3.3WU MIC2940A-5.0BT MIC2940A-5.0BU MIC2940A-5.0WT MIC2940A-5.0WU MIC2940A-12BT MIC2940A-12BU MIC2940A-12WT MIC2940A-12WU MIC2941ABT MIC2941ABU MIC2941AWT MIC2941AWU Note: 1. RoHS compliant with ‘hot-melting solder’ exemption. Schematic Diagram July 2007 Voltage Temperature Range 3.3V –40° to +125°C 3.3V –40° to +125°C 3.3V –40° to +125°C 3.3V – ...

Page 3

Micrel, Inc. Absolute Maximum Ratings If Military/Aerospace specified devices are required, contact your local Micrel representative/distributor for availability and specifications Power Dissipation (Note 1) .......................Internally Limited Lead Temperature (soldering, 5 sec.)........................ 260°C Storage Temperature ................................–65°C to +150°C Operating Junction Temperature ...

Page 4

Micrel, Inc. Electrical Characteristics (MIC2941A Only) Parameter Reference Voltage Adjust Pin Bias Current Reference Voltage Temperature Coefficient Adjust Pin Bias Current Temperature Coefficient Shutdown Input Input Logic Voltage Shutdown Pin Input Current Regulator Output Current in Shutdown Notes: 1. Absolute ...

Page 5

Micrel, Inc. Typical Characteristics Dropout Voltage vs. Output Current 500 400 300 200 100 0 0.00 0.25 0.50 0.75 1.00 1.25 OUTPUT CURRENT (A) Ground Current vs. Output Current 0 100 1000 10000 10A OUTPUT ...

Page 6

Micrel, Inc. Typical Characteristics (continued) MIC29401/2 Shutdown Current vs. Temperature 125 100 -60 - 120 150 TEMPERATURE (°C) MIC29402/3 Adjust Pin Current ...

Page 7

Micrel, Inc. Application Information External Capacitors A 10µF (or greater) capacitor is required between the MIC2940A output and ground to prevent oscillations due to instability. Most types of tantalum or aluminum electrolytics will be adequate; film types will work, but ...

Page 8

Micrel, Inc. Typical Applications OUT GND Figure 2. MIC2940A-5.0 Fixed +5V Regulator + OUT GND ADJUST * Minimum Input-Output Voltage Ranges from 40mV to 400mV, depending on Load Current. Figure 4. ...

Page 9

Micrel, Inc. Package Information July 2007 3-Pin TO-220 (T) 3-Pin TO-263 (U) 9 MIC2940A/2941A M9999-071307 ...

Page 10

Micrel, Inc. July 2007 5-Pin TO-220 (T) 5-Pin TO-263 (U) 10 MIC2940A/2941A M9999-071307 ...

Page 11

Micrel, Inc. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...

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