MIC2915X/30X/50X/75X
High-Current Low Dropout Regulators
Features
General Description
• 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
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.
Applications
•
•
•
•
•
Battery-Powered Equipment
High-Efficiency Green Computer Systems
Automotive Electronics
High-Efficiency Linear Power Supplies
High-Efficiency Post-Regulator for Switching
Supply
On the MIC29xx1 and MIC29xx2, the ENABLE pin may
be tied to VIN 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 (D2Pak)
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.
Package Types
MIC29151/301/501/751
5-Lead TO-220 Fixed Voltage (T)
(Top View)
2016-2019 Microchip Technology Inc.
3
OUT
2
GND
1
IN
TAB
TAB
MIC29150/300/500
3-Lead TO-220 (T)
(Top View)
5 FLG
4 OUT
3 GND
2 IN
1 EN
DS20005685B-page 1
MIC2915X/30X/50X/75X
Package Types (Continued)
MIC29153/303/503
5-Lead TO-220 Adjustable with Flag (T)
(Top View)
FLG
OUT
GND
IN
EN
ADJ
OUT
GND
IN
EN
TAB
MIC29151/301/501
5-Lead TO-263 (D2Pak) Fixed Voltage (U)
(Top View)
5
4
3
2
1
3
OUT
2
GND
1
IN
MIC29302/502
5-Lead TO-263 (D2Pak) Adj. Voltage (U)
(Top View)
MIC29752
5-Lead TO-247 Adjustable Voltage (WT)
(Top View)
5
4
3
2
1
TAB
MIC29150/300
3-Lead TO-263 (D2Pak) (UT)
(Top View)
MIC29751
5-Lead TO-247 Fixed Voltage (WT)
(Top View)
5
4
3
2
1
5 ADJ
4 OUT
3 GND
2 IN
1 FLG
FLG
OUT
GND
IN
EN
TAB
TAB
5 ADJ
4 OUT
3 GND
2 IN
1 EN
TAB
MIC29152/302/502
5-Lead TO-220 Adjustable Voltage (T)
(Top View)
5
4
3
2
1
ADJ
OUT
GND
IN
EN
MIC29152
5-Lead TO-252 (D-Pak) Adjustable Voltage (D)
(Top View)
5
4
3
2
1
ADJ
OUT
GND
IN
EN
TAB
MIC29153/303/503
5-Lead TO-263 (D2Pak) Adj. with Flag (U)
(Top View)
DS20005685B-page 2
5
4
3
2
1
ADJ
OUT
GND
IN
FLG
2016-2019 Microchip Technology Inc.
MIC2915X/30X/50X/75X
Typical Application Circuits
MIC29300
Fixed Output Version
MIC29152
Adjustable Output Version
MIC29300-3.3
5V
3.3V @ 3A
OUT
IN
MIC29152WD
3.3VIN
IN
2.5VOUT@1.5A
OUT
10μF Tantalum
CIN
*R1
ȍ
CIN
EN
ADJ
*R2
ȍ
GND
GND
+ 10μF Tantalum
* See Minimum Load Current Section
Functional Diagram
IN
OUT
O.V.
I LIMIT
FLAG
1.180V
REFERENCE
32V
1.240V
R1*
ADJ†
EN
THERMAL
SHUTDOWN
R2*
GND
* FEEDBACK NETWORK IN FIXED VERSIONS ONLY
† ADJUSTABLE VERSION ONLY
2016-2019 Microchip Technology Inc.
DS20005685B-page 3
MIC2915X/30X/50X/75X
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings † (Note 1)
Input Supply Voltage (VIN) (Note 1)............................................................................................................. –20V to +60V
Enable Input Voltage (VEN) ........................................................................................................................... –0.3V to VIN
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 (''3$.@
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