MIC37139-1.8BS TR Micrel Inc, MIC37139-1.8BS TR Datasheet

IC REG LDO 1.5A 2.8V SOT-223

MIC37139-1.8BS TR

Manufacturer Part Number
MIC37139-1.8BS TR
Description
IC REG LDO 1.5A 2.8V SOT-223
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC37139-1.8BS TR

Regulator Topology
Positive Fixed
Voltage - Output
2.8V
Voltage - Input
Up to 6V
Number Of Regulators
1
Current - Output
1.5A (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-223 (3 leads + Tab), SC-73, TO-261
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Voltage - Dropout (typical)
-
Current - Limit (min)
-
Other names
MIC37139-1.8BSTR
MIC37139-1.8BSTR
General Description
The Micrel MIC37139 is a 1.5A low-dropout linear voltage
regulator that provides a low-voltage, high-current output
with a minimum of external components. It offers high
precision, ultra-low dropout (500mV overtemperature), and
low ground current.
The MIC37139 operates from an input of 2.25V to 6.0V. It
is designed for a wide variety of applications including
digital circuits requiring low-voltage at high currents (i.e.,
PLDs, DSPs, microcontrollers, etc.). It is available in a
fixed output voltage of 1.8V, and as low as 1.5V.
Features of the MIC37139 LDO include thermal and
current-limit protection, and reverse-current and reverse-
battery protection. It’s junction temperature range of the is
from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
Super βeta is a registered trademark of Micrel, Inc
PowerPC is a registered trademark of IBM Corporation.
November 2009
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
1.8V/1.5A Regulator
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
• Stable with ceramic or tantalum capacitor
• Wide input voltage range: V
• +1.0% initial output tolerance
• Fixed 1.8V output voltage
• Excellent line and load regulation specifications
• Thermal shutdown and current-limit protection
• Reverse-leakage protection
• Low profile SOT-223 package
Applications
• LDO linear regulator for low-voltage digital IC
• PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Battery charger
• Set-top boxes
• Digital video recorders
• PowerPC
• Multimedia and PC processor supplies
408
1.5A, Low-Voltage µCap LDO Regulator
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
®
power supplies
MIC37139
IN
:2.25V to 6.0V
M9999-110209

Related parts for MIC37139-1.8BS TR

MIC37139-1.8BS TR Summary of contents

Page 1

... It offers high precision, ultra-low dropout (500mV overtemperature), and low ground current. The MIC37139 operates from an input of 2.25V to 6.0V designed for a wide variety of applications including digital circuits requiring low-voltage at high currents (i.e., PLDs, DSPs, microcontrollers, etc.). It is available in a fixed output voltage of 1 ...

Page 2

... Voltage* Junction Temperature Range 1.8V –40° to +125°C 1.8V –40° to +125°C 2.5V –40° to +125°C OUT GND OUT IN SOT-223 (S) Pin Function Ground Regulator Output Regulator Input 2 MIC37139 Package Lead Finish SOT-223 Standard SOT-223 Pb-Free SOT-223 Pb-Free M9999-110209 ...

Page 3

... EN ) ..................–40°C ≤ (4) SOT-223 (θ ) ....................................................50°C/W JC < +125°C, unless noted. J Min Typ –1 ≤ 6V –2 0.06 0.2 17 1.0 2. +1V. For output voltages below 1.75V, dropout voltage IN OUT MIC37139 ≤ +125°C J Max Units + 0 350 mV 500 mA 30 µ M9999-110209 ...

Page 4

... Micrel, Inc. Typical Characteristics November 2009 4 MIC37139 M9999-110209 ...

Page 5

... Micrel, Inc. Typical Characteristics November 2009 5 MIC37139 M9999-110209 ...

Page 6

... Micrel, Inc. Functional Characteristics November 2009 6 MIC37139 M9999-110209 ...

Page 7

... Micrel, Inc. Functional Diagram November 2009 MIC37139 Fixed Regulator Block Diagram 7 MIC37139 M9999-110209 ...

Page 8

... Refer to “Application Note 9” for further details and examples on thermal design and heat sink applications. Output Capacitor The MIC37139 requires an output capacitor for stable operation µCap LDO, the MIC37139 can operate with ceramic output capacitors as long as the amount of capacitance is 47µF or greater. For values of output ® ...

Page 9

... This gives the PNP-based regulators a distinct advantage over older, regulators. Minimum Load Current The MIC37139 regulator is specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. A 10mA minimum load current is necessary for proper operation. 9 MIC37139 NPN-based ...

Page 10

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully November 2009 SOT-223 (S) indemnify Micrel for any damages resulting from such use or sale. © 2003 Micrel, Incorporated. 10 MIC37139 M9999-110209 ...

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