mic37252 Micrel Semiconductor, mic37252 Datasheet

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mic37252

Manufacturer Part Number
mic37252
Description
Mic37252 2.5a, Low Voltage ?cap Ldo Regulator
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The Micrel MIC37252 is a 2.5A low-dropout linear voltage
regulator that provides a low voltage, high current output
with a minimum of external components. It offers high
precision, low dropout and low ground current.
The MIC37252 operates from an input voltage of 3.0V
to6.0V. It is designed to drive digital circuits requiring low
voltage at high currents (i.e., PLDs, DSP, microcontroller,
etc.). It is available in an adjustable output voltage capable
of 1.24V to 5.5V.
Features of the MIC37252 LDO include thermal and
current limit protection, and reverse current and reverse
battery protection.
Junction temperature range of the MIC37252 is from
–40°C to +125°C.
For higher currents see the MIC3730x family of LDOs.
____________________________________________________________________________________________________________
Typical Application
SuperSwitcher and Super ßeta PNP are trademarks of Micrel, Inc.
February 2006
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Adjustable Regulator
Features
• 2.5A minimum guaranteed output current
• Ideal for 3.3V to 1.8V conversion
• Stable with ceramic or tantalum capacitor
• ±2.0% initial output tolerance
• Dropout voltage = 550mV @ 2.5A
• Excellent line and load regulation specifications
• Logic controlled shutdown
• Thermal shutdown and current limit protection
• Reverse-leakage protection
• S-Pak and TO-263 packages
Applications
• LDO linear regulator for low-voltage digital IC
• PC add-in cards
• High efficiency linear power supplies
• SMPS post regulator
• Battery charger
408
2.5A, Low Voltage µCap LDO Regulator
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
MIC37252
(408) 955-1690
M9999-021606

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mic37252 Summary of contents

Page 1

... General Description The Micrel MIC37252 is a 2.5A low-dropout linear voltage regulator that provides a low voltage, high current output with a minimum of external components. It offers high precision, low dropout and low ground current. The MIC37252 operates from an input voltage of 3.0V to6.0V designed to drive digital circuits requiring low voltage at high currents (i ...

Page 2

... Input voltage which supplies current to the output power device. Ground (TAB is connected to ground on S-Pak). Regulator Output. Adjustable regulator feedback input. Connect to resistor voltage divider. 2 Junction Package Temperature Range –40° to +125°C S-Pak-5 –40° to +125°C TO-263-5 MIC37252 M9999-021606 (408) 955-1690 ...

Page 3

... J Min Typ -2 ≤ 0.02 0.2 400 550 40 1.0 3 150 2. 1.215 1.240 1.202 1V. For output voltages below 2V, dropout voltage IN OUT MIC37252 ≤ +125°C J Max Units + 0 500 mV 1000 mA 60 µA A µs 250 V V 0.8 2 µ ...

Page 4

... TEMPERATURE ( °C) Ground Current vs. Temperature 50 2.5A Load Load 1. 10mA Load 0. -40 - 100 120 TEMPERATURE ( °C) Dropout Characteristics 2.0 0.5A 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 2.5 SUPPLY VOLTAGE (V) MIC37252 1.5 2 2.5 100mA Load 1.5A 2. M9999-021606 (408) 955-1690 ...

Page 5

... Micrel, Inc. Functional Characteristics LoadTransient Response 1.8V OUT C = 47µF OUT TIME (400 µs/div.) February 2006 2A 10mA 5 LoadTransient Response 1.8V OUT C = 47µF OUT 2.5A TIME (400 µs/div.) Line Transient Response TIME (100 µs/div.) M9999-021606 (408) 955-1690 MIC37252 10mA 5V 3.3V ...

Page 6

... Output Capacitor The MIC37252 requires an output capacitor for stable ® process operation µCap LDO, the MIC37252 can operate with ceramic output capacitors as long as the amount of capacitance is 47µF or greater. For values of output capacitance lower than 47µF, the recommended ESR range is 200mΩ to 2Ω. The minimum value of output capacitance recommended for theMIC37252 is 10µ ...

Page 7

... A 10mA minimum load current is necessary for proper operation. Enable Input The MIC37252 also features an enable input for on/off control of the device. Its shutdown state draws “zero” current (only microamperes of leakage). The enable February 2006 input is TTL/CMOS compatible for simple logic interface, but can be connected VIN ...

Page 8

... 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 February 2006 5-Pin S-PAK (R) 4 θ 1 θ 2 θ 1 θ 3 θ 5-Pin TO-263 (U) indemnify Micrel for any damages resulting from such use or sale. © 2002 Micrel, Incorporated θ 2 θ 3 θ 4 θ MIC37252 M9999-021606 (408) 955-1690 ...

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