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MIC37300 Datasheet(PDF) 1 Page - Micrel Semiconductor

Part No. MIC37300
Description  3.0A, LOW VOLTAGE UCAP LDO REGULATOR
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC37300 Datasheet(HTML) 1 Page - Micrel Semiconductor

 
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November 2003
1
M0307-112003
MIC37300/37301/37302
Micrel
MIC37300/37301/37302
3.0A, Low-Voltage
µCap LDO Regulator
General Description
The Micrel MIC37300/01/02 is a 3.0A low-dropout linear
voltage regulator that provides a low-voltage, high-current
output with a minimum number of external components. It
offers high precision, ultra-low-dropout (500mV overtem-
perature), and low-ground current.
The MIC37300/01/02 operates from an input of 2.25V to
6.0V. It is designed to drive digital circuits requiring low-
voltage at high currents (i.e., PLDs, DSP, microcontroller,
etc.). It is available in fixed and adjustable output voltages.
Fixed voltages include 1.5V, 1.8V, 2.5V and 3.3V. The
adjustable version is capable of 1.24V to 5.5V.
Features of the MIC37300/01/02 LDO include thermal and
current-limit protection, and reverse-current protection. Logic
enable and error flag pins are available on the 5-pin version.
Junction temperature range of the MIC37300/01/02 is from
–40
°C to 125°C.
For applications requiring input voltage greater than 6.0V,
see the MIC3910x, MIC3915x, MIC3930x, and MIC3950x
LDOs.
All data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
Typical Application
VOUT
VIN
GND
COUT
47
µF, Ceramic
MIC37300
VIN = 3.0V
VOUT = 2.5V
Fixed 2.5V Regulator
VOUT
VIN
FLG
GND
VEN
COUT
47
µF, Ceramic
100k
MIC37301
VIN = 3.0V
VOUT = 2.5V
CIN
Fixed 2.5V Regulator with Error Flag
Features
• 3.0A minimum guaranteed output current
• 500mV maximum dropout-voltage overtemperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion
• Stable with ceramic or tantalum capacitor
• Wide input voltage range:
V
IN:
2.25V to 6.0V
• +1.0% initial output tolerance
• Fixed and adjustable output voltages:
MIC37300 — 3-pin fixed
MIC37301 — 5-pin fixed with flag
MIC37302 — 5-pin adjustable
• Excellent line and load regulation specifications
• Logic controlled shutdown
• Thermal shutdown and current-limit protection
• Reverse-leakage protection
• Low profile S-Pak package
Applications
• LDO linear regulator for low-voltage digital IC
• PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Battery charger
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Super ßeta PNP is a registered trademark of Micrel, Inc.
VOUT
VIN
ADJ
GND
VEN
COUT
47
µF, Ceramic
R1
R2
1.3V
MIC37302
VIN
CIN
Adjustable Regulator
0
50
100
150
200
250
300
350
400
450
500
0
0.5
1
1.5
2
2.5
3
OUTPUT CURRENT (A)
Dropout vs.
Output Current
2.5V
OUT
3.3V
OUT


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