MIC2915X/30X/50X/75X
High-Current Low Dropout Regulators
Features
• High Current Capability:
- MIC29150/29151/29152/29153: 1.5A
- MIC29300/29301/29302/29303: 3A
- MIC29500/29501/29502/29503: 5A
- MIC29751/29752: 7.5A
• Low Dropout Voltage
• Low Ground Current
• Accurate 1% Guaranteed Tolerance
• Extremely Fast Transient Response
• Reverse-Battery and “Load Dump” Protection
• Zero-Current Shutdown Mode (5-Pin Versions)
• Error Flag Signals Output Out-of-Regulation
(5-Pin Versions)
• Also Characterized for Smaller Loads with
Industry-Leading Performance Specifications
• Fixed-Voltage and Adjustable Versions
General Description
The MIC2915x/2930x/2950x/2975x are high current,
high accuracy, low dropout voltage regulators. Using
Microchip’s proprietary Super
βeta
PNP process with a
PNP pass element, these regulators feature 350 mV to
425 mV (full load) typical dropout voltages and very low
ground current. Designed for high current loads, these
devices also find applications in lower current,
extremely low dropout-critical systems, where their tiny
dropout voltage and ground current values are
important attributes.
The MIC2915x/2930x/2950x/2975x are fully protected
against overcurrent faults, reversed input polarity,
reversed lead insertion, overtemperature operation,
and positive and negative transient voltage spikes. Five
pin fixed-voltage versions feature logic level ON/OFF
control and an error flag that signals whenever the
output falls out of regulation. Flagged states include
low input voltage (dropout), output current limit,
overtemperature shutdown, and extremely high voltage
spikes on the input.
On the MIC29xx1 and MIC29xx2, the ENABLE pin may
be tied to V
IN
if it is not required for ON/OFF control.
The MIC2915x/2930x/2950x are available in 3-pin and
5-pin TO-220 and surface mount TO-263 (D
2
Pak)
packages. The MIC2975x 7.5A regulators are available
in a 5-pin TO-247 package. The 1.5A, adjustable output
MIC29152 is available in a 5-pin power D-Pak
(TO-252) package.
For applications with input voltage 6V or below, see
MIC37xxx LDOs.
Applications
•
•
•
•
•
Battery-Powered Equipment
High-Efficiency Green Computer Systems
Automotive Electronics
High-Efficiency Linear Power Supplies
High-Efficiency Post-Regulator for Switching
Supply
Package Types
MIC29150/300/500
3-Lead TO-220 (T)
(Top View)
MIC29151/301/501/751
5-Lead TO-220 Fixed Voltage (T)
(Top View)
3
TAB
OUT
TAB
2
1
GND
IN
5 FLG
4 OUT
3 GND
2 IN
1 EN
2016 Microchip Technology Inc.
DS20005685A-page 1
MIC2915X/30X/50X/75X
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings † (Note
1)
Input Supply Voltage (V
IN
) (Note
1).............................................................................................................
–20V to +60V
Enable Input Voltage (V
EN
) ........................................................................................................................... –0.3V to V
IN
Power Dissipation...................................................................................................................................Internally Limited
ESD Rating ............................................................................................................................................................
Note 2
Operating Ratings‡
Maximum Operating Input Voltage ............................................................................................................................+26V
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice:
The device is not guaranteed to function outside its operating ratings.
Note 1:
Maximum positive supply voltage of 60V must be of limited duration (<100 ms) and duty cycle (≤1%). The
maximum continuous supply voltage is 26V. Exceeding the absolute maximum rating may damage the
device.
2:
Devices are ESD sensitive. Handling precautions recommended.
DS20005685A-page 4
2016 Microchip Technology Inc.
微控制器 MCU
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