MIC37301 MICREL [Micrel Semiconductor], MIC37301 Datasheet

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MIC37301

Manufacturer Part Number
MIC37301
Description
3.0A, LOW VOLTAGE UCAP LDO REGULATOR
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.MIC37301.pdf (12 pages)

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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
Super ßeta PNP is a registered trademark of Micrel, Inc.
November 2003
MIC37300/37301/37302
V
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
IN
= 3.0V
C
IN
Fixed 2.5V Regulator with Error Flag
V
IN
= 3.0V
Fixed 2.5V Regulator
VIN
VEN
VIN
MIC37301
MIC37300
GND
GND
VOUT
VOUT
FLG
100k
C
47 F, Ceramic
OUT
V
OUT
= 2.5V
C
47 F, Ceramic
OUT
V
OUT
= 2.5V
1
Features
• 3.0A minimum guaranteed output current
• 500mV maximum dropout-voltage overtemperature
• Stable with ceramic or tantalum capacitor
• Wide input voltage range:
• +1.0% initial output tolerance
• Fixed and adjustable output voltages:
• 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
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion
V
MIC37300 — 3-pin fixed
MIC37301 — 5-pin fixed with flag
MIC37302 — 5-pin adjustable
V
IN
IN
3.0A, Low-Voltage Cap LDO Regulator
C
:
IN
MIC37300/37301/37302
2.25V to 6.0V
VIN
VEN
500
450
400
350
300
250
200
150
100
Adjustable Regulator
50
0
MIC37302
0
GND
2.5V
0.5
OUTPUT CURRENT (A)
Output Current
VOUT
OUT
Dropout vs.
ADJ
1
3.3V
1.5
OUT
2
R1
R2
2.5
3
1.3V
C
47 F, Ceramic
M0307-112003
OUT
Micrel

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MIC37301 Summary of contents

Page 1

... IN • +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 • ...

Page 2

... Ordering Information Part Number MIC37300-1.5BR MIC37300-1.65BR MIC37300-1.8BR MIC37300-2.5BR MIC37300-3.3BR MIC37301-1.5BR MIC37301-1.8BR MIC37301-2.5BR MIC37301-3.3BR MIC37302BR MIC37302BU *For other voltages contact Micrel. Pin Configuration S-PAK-5 (R) TO-263-5 (U) Pin Description Pin Number Pin Number Pin Name ...

Page 3

MIC37300/37301/37302 Absolute Maximum Rating Supply Voltage (V ) .................................................... 6.5V IN (3) ................................................ Enable Input Voltage ( (3) ............................... Power Dissipation ( Junction Temperature (T ) ................. – Storage Temperature (T ) ................. –65 ...

Page 4

MIC37300/37301/37302 Notes – V when V decreased to 98% of its nominal output voltage with OUT OUT voltage specification does not apply due to a minimum input operating voltage of 2.25V ...

Page 5

MIC37300/37301/37302 Typical Characteristics Power Supply Rejection Ratio 2. 1.5V OUT OUT OUT 0.01 0.1 1 ...

Page 6

MIC37300/37301/37302 Ground Current vs. Supply Voltage (3.3V) 1.4 1.2 1 0.8 100mA 0.6 0.4 0.2 10mA SUPPLY VOLTAGE (V) Ground Current vs. Temperature 2.5V OUT ...

Page 7

MIC37300/37301/37302 Functional Characteristics November 2003 7 Micrel M0307-112003 ...

Page 8

MIC37300/37301/37302 Applications Information The MIC37300/01/ high-performance low-dropout voltage regulator suitable for moderate to high-current regu- lator applications. Its 500mV dropout voltage at full load and overtemperature makes it especially valuable in battery- powered systems and as high-efficiency noise ...

Page 9

... A 10mA minimum load current is necessary for proper operation. Error Flag The MIC37301 features an error flag circuit that monitors the output voltage and signals an error condition when the voltage is 5% below the nominal output voltage. The error flag is an open-collector output that can sink 10mA during a fault condition ...

Page 10

MIC37300/37301/37302 Package Information 0.065 0.010 20 2 0.067 0.005 DIM. = INCH 0.050 (1.27) 0.030 (0.76) 0.320 (8.13) 0.310 (7.87) M0307-112003 0.405 0.005 0.050 0.005 0.360 0.005 0.600 0.025 8 MAX 0.032 0.003 0.015 0.002 5-Lead TO-263-5 (U) DIMENSIONS: 0.375 ...

Page 11

MIC37300/37301/37302 0.050 (1.27) 0.030 (0.76) 0.320 (8.13) 0.310 (7.87) November 2003 0.375 (9.52) 0.365 (9.27) 0.360 (9.14) 0.350 (8.89) 0.008 (0.20) 0.004 (0.10) 0.256 BSC (6.50 BSC) 0.316 BSC (8.03 BSC) 0.420 (0.20) 0.410 (0.10) 0.031 (0.79) 0.025 (0.63) 0.100 ...

Page 12

MIC37300/37301/37302 MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its ...

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