MIC29150/29300/29500/29750
High-Current Low-Dropout Regulators
**See Thermal Design Section
Super βeta PNP is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
January 2012 M9999-013112-B
General Description
The MIC29150/29300/29500/29750 are high current, high
accuracy, low-dropout voltage regulators. Using Micrel's
proprietary Super βeta PNP® process with a PNP pass
element, these regulators feature 350mV to 425mV (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 MIC29150/29300/29500/29750 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 which 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 VIN if it is not required for ON/OFF control. The
MIC29150/29300/29500 are available in 3-pin and 5-pin
TO-220 and surface mount TO-263 (D2Pak) packages.
The MIC29750 7.5A regulators are available in 3-pin and
5-pin TO-247 packages. 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.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• High current capability
MIC29150/29151/29152/29153 ................................. 1.5A
MIC29300/29301/29302/29303 .................................... 3A
MIC29500/29501/29502/29503 .................................... 5A
MIC29750/29751/29752 ............................................ 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
Applications
• Battery powered equipment
• High-efficiency “Green” computer systems
• Automotive electronics
• High-efficiency linear lower supplies
• High-efficiency lost-regulator for switching supply
_________________________________________________________________________________________________________________________
Typical Application**
Fixed Output Voltage Adjustable Output Voltage
(*See Minimum Load Current Section)
Micrel, Inc. MIC29150/29300/29500/29750
January 2012 2 M9999-013112-B
Ordering Information
Part Number Junction Temp.
Range(1) Voltage Current Package
Standard RoHS Compliant(2)
MIC29150-3.3BT MIC29150-3.3WT(2) –40°C to +125°C 3.3 1.5A 3-Pin TO-220
MIC29150-3.3BU MIC29150-3.3WU(2) –40°C to +125°C 3.3 1.5A 3-Pin TO-263
MIC29150-5.0BT MIC29150-5.0WT(2) –40°C to +125°C 5 1.5A 3-Pin TO-220
MIC29150-5.0BU MIC29150-5.0WU(2) –40°C to +125°C 5 1.5A 3-Pin TO-263
MIC29150-12BT MIC29150-12WT(2) –40°C to +125°C 12 1.5A 3-Pin TO-220
MIC29150-12BU MIC29150-12WU(2) –40°C to +125°C 12 1.5A 3-Pin TO-263
MIC29151-3.3BT MIC29151-3.3WT(2) –40°C to +125°C 3.3 1.5A 5-Pin TO-220
MIC29151-3.3BU MIC29151-3.3WU(2) –40°C to +125°C 3.3 1.5A 5-Pin TO-263
MIC29151-5.0BT MIC29151-5.0WT(2) –40°C to +125°C 5 1.5A 5-Pin TO-220
MIC29151-5.0BU MIC29151-5.0WU(2) –40°C to +125°C 5 1.5A 5-Pin TO-263
MIC29151-12BT MIC29151-12WT(2) –40°C to +125°C 12 1.5A 5-Pin TO-220
MIC29151-12BU MIC29151-12WU(2) –40°C to +125°C 12 1.5A 5-Pin TO-263
MIC29152BT MIC29152WT(2) –40°C to +125°C Adj. 1.5A 5-Pin TO-220
MIC29152BU MIC29152WU(2) –40°C to +125°C Adj. 1.5A 5-Pin TO-263
— MIC29152WD(2) –40°C to +125°C Adj. 1.5A 5-Pin TO-252
MIC29153BT(3) Contact Factory –40°C to +125°C Adj. 1.5A 5-Pin TO-220
MIC29153BU(3) Contact Factory –40°C to +125°C Adj. 1.5A 5-Pin TO-263
MIC29300-3.3BT MIC29300-3.3WT(2) –40°C to +125°C 3.3 3.0A 3-Pin TO-220
MIC29300-3.3BU MIC29300-3.3WU(2) –40°C to +125°C 3.3 3.0A 3-Pin TO-263
MIC29300-5.0BT MIC29300-5.0WT(2) –40°C to +125°C 5 3.0A 3-Pin TO-220
MIC29300-5.0BU MIC29300-5.0WU(2) –40°C to +125°C 5 3.0A 3-Pin TO-263
MIC29300-12BT MIC29300-12WT(2) –40°C to +125°C 12 3.0A 3-Pin TO-220
MIC29300-12BU MIC29300-12WU(2) –40°C to +125°C 12 3.0A 3-Pin TO-263
MIC29301-3.3BT MIC29301-3.3WT(2) –40°C to +125°C 3.3 3.0A 5-Pin TO-220
MIC29301-3.3BU MIC29301-3.3WU(2) –40°C to +125°C 3.3 3.0A 5-Pin TO-263
MIC29301-5.0BT MIC29301-5.0WT(2) –40°C to +125°C 5 3.0A 5-Pin TO-220
MIC29301-5.0BU MIC29301-5.0WU(2) –40°C to +125°C 5 3.0A 5-Pin TO-263
MIC29301-12BT MIC29301-12WT(2) –40°C to +125°C 12 3.0A 5-Pin TO-220
MIC29301-12BU MIC29301-12WU(2) –40°C to +125°C 12 3.0A 5-Pin TO-263
MIC29302BT MIC29302WT(2) –40°C to +125°C Adj. 3.0A 5-Pin TO-220
MIC29302BU MIC29302WU(2) –40°C to +125°C Adj. 3.0A 5-Pin TO-263
MIC29303BT MIC29303WT(2) –40°C to +125°C Adj. 3.0A 5-Pin TO-220
MIC29303BU MIC29303WU(2) –40°C to +125°C Adj. 3.0A 5-Pin TO-263
MIC29500-3.3BT MIC29500-3.3WT(2) –40°C to +125°C 3.3 5.0A 3-Pin TO-220
MIC29500-5.0BT MIC29500-5.0WT(2) –40°C to +125°C 5 5.0A 3-Pin TO-220
MIC29501-3.3BT MIC29501-3.3WT(2) –40°C to +125°C 3.3 5.0A 5-Pin TO-220
MIC29501-3.3BU MIC29501-3.3WU(2) –40°C to +125°C 3.3 5.0A 5-Pin TO-263
MIC29501-5.0BT MIC29501-5.0WT(2) –40°C to +125°C 5 5.0A 5-Pin TO-220
MIC29501-5.0BU MIC29501-5.0WU(2) –40°C to +125°C 5 5.0A 5-Pin TO-263
MIC29502BT MIC29502WT(2) –40°C to +125°C Adj. 5.0A 5-Pin TO-220
Micrel, Inc. MIC29150/29300/29500/29750
January 2012 3 M9999-013112-B
Part Number Junction Temp.
Range(1) Voltage Current Package
Standard RoHS Compliant(2)
MIC29502BU MIC29502WU(2) –40°C to +125°C Adj. 5.0A 5-Pin TO-263
MIC29503BT MIC29503WT(2) –40°C to +125°C Adj. 5.0A 5-Pin TO-220
MIC29503BU MIC29503WU(2) –40°C to +125°C Adj. 5.0A 5-Pin TO-263
MIC29750-3.3BWT Contact Factory –40°C to +125°C 3.3 7.5A 3-Pin TO-247
MIC29750-5.0BWT Contact Factory –40°C to +125°C 5 7.5A 3-Pin TO-247
MIC29751-3.3BWT Contact Factory –40°C to +125°C 3.3 7.5A 5-Pin TO-247
MIC29751-5.0BWT Contact Factory –40°C to +125°C 5 7.5A 5-Pin TO-247
MIC29752BWT MIC29752WWT(2) –40°C to +125°C Adj. 7.5A 5-Pin TO-247
Note:
1. Junction Temperature
2. RoHS compliant with ‘high-melting solder’ exemption.
3. Special Order, Contact Factory
Pin Configuration
3-Pin TO-220 (T)
MIC29150/29300/29500
5-Pin TO-220 Fixed Voltag e (T)
MIC29151/29301/29501/29751
5-Pin TO-220 Adjustable Voltage (T)
MIC29152/29302/29502
5-Pin TO-220 Adjustable wi th Flag (T)
MIC29153/29303/29503
3-Pin TO-247 (WT)
MIC29750
5-Pin TO-247 Fixed Voltag e (WT)
MIC29751
5-Pin TO-247 Adjustable Voltage (WT)
MIC29752 3-Pin TO-263 (D
2
Pak) (UT)
MIC29150/29300
Micrel, Inc. MIC29150/29300/29500/29750
January 2012 4 M9999-013112-B
5-Pin TO-263 (D
2
Pak) Fixed Voltage (U)
MIC29151/29301/29501 5-Pin TO-263 (D
2
Pak) Adjustable Voltage (U)
MIC29302/29502
5-Pin TO-263 (D
2
Pak) Adjustable with Flag (U)
MIC29153/29303/29503 5-Pin TO-252 (D-Pak) Adjustable Voltage (D)
MIC29152
Pin Description
Pin Number
TO-220
TO-247
TO-263
Pin Name
1 INPUT: Supplies the current to the output power device
2 GND: TAB is also connected internally to the IC’s ground on D-PAK.
3 OUTPUT: The regulator output voltage
Pin Description
Pin Number
Fixed
TO-220
TO-247
TO-263
Pin Number
Adjustable
TO-220
TO-247
TO-252
TO-263
Pin Number
Adj. with Flag
TO-220
TO-247
TO-263
Pin Name
1 1
— ENABLE: CMOS compatible control input.
Logic high = enable, logic low = shutdown.
2 2 2 INPUT: Supplies the current to the output power device
3, TAB 3, TAB 3, TAB GND: TAB is also connected internally to the IC’s ground on D-PAK.
4 4 4 OUTPUT: The regulator output voltage
— 5 5
ADJUST: Adjustable regulator feedback input that connects to the resistor
voltage divider that is placed from OUTPUT to GND in order to set the
output voltage.
5 — 1
FLAG: Active low error flag output signal that indicates an output fault
condition
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Absolute Maximum Ratings(1)
Input Supply Voltage (VIN)(1) ........................... –20V to +60V
Enable Input Voltage (VEN) ................................ –0.3V to VIN
Lead Temperature (soldering, 5sec.) ......................... 260°C
Power Dissipation ..................................... Internally Limited
Storage Temperature Range .................... –65°C to +150°C
ESD Rating ................................................................ Note 3
Operating Ratings(2)
Operating Junction Temperature .............. –40°C to +125°C
Maximum Operating Input Voltage ................................ 26V
Package Thermal Resistance
TO-220 (θJC) ......................................................... 2°C/W
TO-263 (θJC) ......................................................... 2°C/W
TO-247 (θJC) ..................................................... 1.5°C/W
TO-252 (θJC) ......................................................... 3°C/W
TO-252 (θJA) ...................................................... 56°C/W
Electrical Characteristics(4,13)
VIN = VOUT + 1V; IOUT = 10mA; TJ = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Parameter Condition Min Typ Max Units
Output Voltage IOUT = 10mA –1 1 %
10mA ≤ IOUT ≤ IFL, (VOUT + 1V) ≤ VIN ≤26V (5) –2 2 %
Line Regulation IOUT = 10mA, (VOUT + 1V) ≤ VIN ≤26V 0.06 0.5 %
Load Regulation VIN = VOUT + 1V, 10mA ≤ IOUT ≤ 1.5A (5,9) 0.2 1 %
∆VO
∆T
Output Voltage (9)
Temperature Coefficient.
20 100
ppm/°C
Dropout Voltage
∆VOUT = -1% (6)
MIC29150
MIC29300
MIC29500
MIC29750
IOUT = 100mA
IOUT = 750mA
IOUT = 1.5A
IOUT = 100mA
IOUT = 1.5A
IOUT = 3A
IOUT = 250mA
IOUT = 2.5A
IOUT = 5A
IOUT = 250mA
IOUT = 4A
IOUT = 7.5A
80
220
350
80
250
370
125
250
370
80
270
425
200
600
175
600
250
600
200
750
mV
Ground Current
MIC29150
MIC29300
MIC29500
MIC29750
Note 8
IOUT = 750mA, VIN = VOUT + 1V
IOUT = 1.5A
IOUT = 1.5A, VIN = VOUT + 1V
IOUT = 3A
IOUT = 2.5A, VIN = VOUT + 1V
IOUT = 5A
IOUT = 4A, VIN = VOUT + 1V
IOUT = 7.5A
8
22
10
37
15
70
35
120
20
35
50
75
mA
mA
mA
mA
IGRNDDOGround Pin
Current at Droupout
VIN = 0.5V less than specified VOUT × IOUT = 10mA
MIC29150
MIC29300
MIC29500
MIC29750
0.9
1.7
2.1
3.1
mA
mA
mA
mA
Current Limit
MIC29150
MIC29300
MIC29500
MIC29750
VOUT = 0V (7)
VOUT = 0V (7)
VOUT = 0V (7)
VOUT = 0V (7)
2.1
4.5
7.5
9.5
3.5
5.0
10.0
15
A
A
A
A
Micrel, Inc. MIC29150/29300/29500/29750
January 2012 6 M9999-013112-B
Parameter Condition Min Typ Max Units
en, Output Noise
Voltage
(10Hz to 100kHz)
IL = 100mA
CL = 10µF
CL = 33µF
400
260
µV
(rms)
Ground Current in
Shutdown
MIC29150/1/2/3 only VEN = 0.4V
2
10
30 µA
µA
Reference MIC29xx2/MIC29xx3
Reference Voltage 1.228
1.215 1.240 1.252
1.265 V
V
Reference Voltage 1.203 1.277 V
Adjust Pin
Bias Current
40 80
120 nA
Reference Voltage
Temperature
Coefficient
(10) 20 ppm/°C
Adjust Pin Bias
Current
Temperature
Coefficient
0.1
nA/°C
Flag Output (Error Comparator) MIC29xx1/29xx3
Output Leakage
Current
VOH = 26V 0.01 1.00
2.00 µA
Output Low Voltage
Device set for 5V, VIN = 4.5V
IOL = 250µA
220
300
400 mV
Upper Threshold
Voltage
Device set for 5V (11) 40
25 60 mV
Lower Threshold
Voltage
Device set for 5V (11) 75 95
140 mV
Hysteresis Device set for 5V (11) 15 mV
ENABLE Input MIC29xx1/MIC29xx2
Input Logic Voltage
Low (OFF)
High (ON)
2.4
0.8 V
Enable Pin
Input Current
VEN = 26V 100 600
750 µA
VEN = 0.8V 0.7 2
4 µA
Regulator Output
Current in Shutdown
(12) 10
500 µA
Micrel, Inc. MIC29150/29300/29500/29750
January 2012 7 M9999-013112-B
Notes:
1. Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle (≤1%). The maximum continuous supply voltage is
26V. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. Specification for packaged product only.
5. Full load current (IFL) is defined as 1.5A for the MIC29150, 3A for the MIC29300, 5A for the MIC29500, and 7.5A for the MIC29750 families.
6. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its normal value with VOUT + 1V applied to VIN.
7. VIN = VOUT (nominal) + 1V. For example, use VIN = 4.3V for a 3.3V regulator or use 6V for a 5V regulator. Employ pulse-testing procedures to pin
current.
8. Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground pin
current.
9. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
10. Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a200mA load pulse at VIN = 20V (a 4W pulse) for T = 10ms.
11. Comparator thresholds are expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured at 6V
input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example,
at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mV x 5V/1.240V = 384mV. Thresholds
remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.
12. VEN ≤ 0.8V and VIN ≤ 26V, VOUT = 0.
13. When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground.
Micrel, Inc. MIC29150/29300/29500/29750
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Typical Characteristics MIC2915x
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Typical Characteristics MIC2930x
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Micrel, Inc. MIC29150/29300/29500/29750
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Typical Characteristics MIC2950x
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Micrel, Inc. MIC29150/29300/29500/29750
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Typical Characteristics MIC2975x
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Micrel, Inc. MIC29150/29300/29500/29750
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Functional Diagram
Micrel, Inc. MIC29150/29300/29500/29750
January 2012 17 M9999-013112-B
Application Information
The MIC29150/29300/29500/29750 are high
performance low-dropout voltage regulators suitable for
all moderate to high-current voltage regulator
applications. Their 350mV to 425mV typical dropout
voltage at full load make them especially valuable in
battery powered systems and as high efficiency noise
filters in “post-regulator” applications. Unlike older NPN-
pass transistor designs, where the minimum dropout
voltage is limited by the base-emitter voltage drop and
collector-emitter saturation voltage, dropout performance
of the PNP output of these devices is limited merely by
the low VCE saturation voltage.
A trade-off for the low-dropout voltage is a varying base
driver requirement. But Micrel’s Super ßeta PNP®
process reduces this drive requirement to merely 1% of
the load current.
The MIC29150/29300/29500/29750 family of regulators
are fully protected from damage due to fault conditions.
Current limiting is provided. This limiting is linear; outp