MIC29150/29300/29500/29750 Series High-Current Low-Dropout Regula

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MIC29150/29300/29500/29750 Series High-Current Low-Dropout Regula

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MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Series
High-Current Low-Dropout Regulators
General Description
MIC29150/29300/29500/29750 high current, high accuracy, low-dropout voltage regulators. Using Micrel's proprietary Super PNPprocess with pass element, these regulators feature 300mV 370mV (full load) dropout voltages very ground current. Designed high current loads, these devices also find applications lower current, extremely dropout-critical systems, where their tiny dropout voltage ground current values important attributes. MIC29150/29300/29500/29750 fully protected against overcurrent faults, reversed input polarity, reversed lead insertion, overtemperature operation, positive negative transient voltage spikes. Five fixed voltage versions feature logic level ON/OFF control error flag which signals whenever output falls regulation. Flagged states include input voltage (dropout), output current limit, overtemperature shutdown, extremely high voltage spikes input. MIC29xx1 MIC29xx2, ENABLE tied required ON/OFF control. MIC29150/29300/29500 available 5-pin TO-220 surface mount TO-263 packages. MIC29750 7.5A regulators available 5-pin TO-247 packages.
Features
High Current Capability MIC29150/29151/29152/29153 1.5A MIC29300/29301/29302/29303 MIC29500/29501/29502/29503 MIC29750/29751/29752 7.5A Low-Dropout Voltage 350mV Full Load Ground Current Accurate Guaranteed Tolerance Extremely Fast Transient Response Reverse-battery "Load Dump" Protection Zero-Current Shutdown Mode (5-Pin versions) Error Flag Signals Output Out-of-Regulation (5-Pin versions) Also Characterized Smaller Loads With IndustryLeading Performance Specifications Fixed Voltage Adjustable Versions
Applications
Battery Powered Equipment High-Efficiency "Green" Computer Systems Automotive Electronics High-Efficiency Linear Power Supplies High-Efficiency Post-Regulator Switching Supply
Configuration
MIC29150/29300BU
MIC29151/29152/29153BU MIC29301/29302/29303BU MIC29501/29502/29503BU
Pinout devices, grounded.
MIC29150/29300/29500/29750 Three Terminal Devices: Input, Ground, Output MIC29151/29301/29501/29751 Five Terminal Fixed Voltage Devices: Enable, Input, Ground, Output, Flag MIC29152/29302/29502/29752 Adjustable with ON/OFF Control Enable, Input, Ground, Output, Adjust
MIC29153/29303/29503 Adjustable with Flag Flag, Input, Ground, Output, Adjust
Micrel, Inc. 1849 Fortune Drive Jose, 95131 (408) 944-0800 (408) 944-0970 http://www.micrel.com
MIC29150/29300/ 29500BT MIC29750BWT
MIC29151/29152/29153BT MIC29301/29302/29303BT MIC29501/29502/29503BT MIC29751/29752BWT
March 2000
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Ordering Information
Part Number MIC29150-3.3BT MIC29150-4.2BT MIC29150-5.0BT MIC29150-12BT MIC29150-3.3BU MIC29150-5.0BU MIC29150-12BU MIC29151-3.3BT MIC29151-5.0BT MIC29151-12BT MIC29151-3.3BU MIC29151-5.0BU MIC29151-12BU MIC29152BT MIC29152BU MIC29153BT MIC29153BU MIC29300-3.3BT MIC29300-5.0BT MIC29300-12BT MIC29300-3.3BU MIC29300-5.0BU MIC29300-12BU MIC29301-3.3BT MIC29301-5.0BT MIC29301-12BT MIC29301-3.3BU MIC29301-5.0BU MIC29301-12BU MIC29302BT MIC29302BU MIC29303BT MIC29303BU Temp. Range* Volts Current Package +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 1.5A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A 3.0A TO-220 TO-220 TO-220 TO-220 TO-263 TO-263 TO-263 TO-220-5 TO-220-5 TO-220-5 TO-263-5 TO-263-5 TO-263-5 TO-220-5 TO-263-5 TO-220-5 TO-263-5 TO-220 TO-220 TO-220 TO-263 TO-263 TO-263 TO-220-5 TO-220-5 TO-220-5 TO-263-5 TO-263-5 TO-263-5 TO-220-5 TO-263-5 TO-220-5 TO-263-5 Part Number MIC29500-3.3BT MIC29500-5.0BT MIC29501-3.3BT MIC29501-5.0BT MIC29501-3.3BU MIC29501-5.0BU MIC29502BT MIC29502BU MIC29503BT MIC29503BU MIC29750-3.3BWT MIC29750-5.0BWT MIC29751-3.3BWT MIC29751-5.0BWT MIC29752BWT Temp. Range* Volts Current Package +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C +125°C 5.0A 5.0A 5.0A 5.0A 5.0A 5.0A 5.0A 5.0A 5.0A 5.0A 7.5A 7.5A 7.5A 7.5A 7.5A TO-220 TO-220 TO-220-5 TO-220-5 TO-263-5 TO-263-5 TO-220-5 TO-263-5 TO-220-5 TO-263-5 TO-247-3 TO-247-3 TO-247-5 TO-247-5 TO-247-5
Junction Temperature
MIC29xx0 versions 3-terminal fixed voltage devices. MIC29xx1 fixed voltage devices with ENABLE ERROR flag. MIC29xx2 adjustable regulators with ENABLE control. MIC29xx3 adjustables with ERROR flag.
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
Absolute Maximum Ratings
Power Dissipation Internally Limited Lead Temperature (Soldering, seconds) 260°C Storage Temperature Range -65°C +150°C Input Supply Voltage (Note -20V +60V
Operating Ratings
Operating Junction Temperature -40°C +125°C Maximum Operating Input Voltage TO-220 2°C/W TO-263 2°C/W TO-247 1.5°C/W
Electrical Characteristics
measurements 25°C unless otherwise noted. Bold values guaranteed across operating temperature range. Adjustable versions programmed 5.0V. Parameter Output Voltage Condition 10mA 10mA IFL, (VOUT (Note Line Regulation Load Regulation Dropout Voltage 10mA, (VOUT VOUT 10mA IOUT IFULL LOAD (Note Output Voltage (Note Temperature Coef. VOUT (Note MIC29150 100mA 750mA 1.5A MIC29300 100mA 1.5A MIC29500 250mA 2.5A MIC29750 250mA 7.5A MIC29150 MIC29300 MIC29500 MIC29750 IGNDDOGround Current Dropout 750mA, VOUT 1.5A 1.5A, VOUT 2.5A, VOUT VOUT 7.5A 0.06 Units ppm/°C
Ground Current
Current Limit
Output Noise Voltage (10Hz 100kHz) 100mA Ground Current Shutdown
0.5V less than specified VOUT. IOUT 10mA MIC29150 MIC29300 MIC29500 MIC29750 MIC29150 VOUT (Note MIC29300 VOUT (Note MIC29500 VOUT (Note MIC29750 VOUT (Note 10µF 33µF MIC29150/1/2/3 only VEN= 0.4V
10.0
(rms)
March 2000
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Electrical Characteristics (Continued)
Reference
Parameter Reference Voltage
MIC29xx2/MIC29xx3
Conditions 1.228 1.215 (Note 1.203 Typical 1.240 1.252 1.265 1.277 Units
Reference Voltage Adjust Bias Current Reference Voltage Temperature Coefficient Adjust Bias Current Temperature Coefficient
(Note
ppm/°C
nA/°C
Flag Output (Error Comparator) MIC29xx1/29xx3 Output Leakage Current Output Voltage Upper Threshold Voltage Lower Threshold Voltage Hysteresis ENABLE Input Input Logic Voltage (OFF) High (ON) Enable Input Current Device 4.5V 250µA Device (Note 0.01 1.00 2.00
Device (Note
Device (Note
MIC29xx1/MIC29xx2
=0.8V Regulator Output Current Shutdown (Note
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
Notes
Note Note Note Note Note Note Note Note Note
Maximum positive supply voltage must limited duration (<100msec) duty cycle (1%). maximum continuous supply voltage 26V. Full Load current (IFL) defined 1.5A MIC29150, MIC29300, MIC29500, 7.5A MIC29750 families. Dropout voltage defined input-to-output differential when output voltage drops nominal value with VOUT applied VOUT (nominal) example, 4.3V 3.3V regulator regulator. Employ pulse-testing procedures minimize temperature rise. Ground current regulator quiescent current. total current drawn from source load current plus ground current. Output voltage temperature coefficient defined worst case voltage change divided total temperature range. Thermal regulation defined change output voltage time after change power dissipation applied, excluding load line regulation effects. Specifications 200mA load pulse pulse) 10ms. VREF VOUT (VIN 2.3V 26V, 10mA IFL, MAX. Comparator thresholds expressed terms voltage differential Adjust terminal below nominal reference voltage measured input. express these thresholds terms output voltage change, multiply error amplifier gain VOUT /VREF R2)/R2. example, programmed output voltage Error output guaranteed when output drops 5V/1.240 Thresholds remain constant percent VOUT VOUT varied, with dropout warning occurring typically below nominal, 7.7% guaranteed.
Note 0.8V 26V, VOUT Note When used dual supply systems where regulator load returned negative supply, output voltage must diode clamped ground.
Block Diagram
O.V. ILIMIT 1.180V FLAG 1.240V
Reference
Thermal Shutdown
Feedback network fixed versions only Adjustable version only
Typical Applications
MIC29500-3.3
3.3V 47µF
VOUT
VOUT 1.240V R2)]
Figure Fixed output voltage.
Figure Adjustable output voltage configuration. best results, total series resistance should small enough pass minimum regulator load current. MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
Typical Characteristics MIC2915x
MIC2915x Dropout Voltage Output Current
MIC2915x Dropout Voltage Temperature
MIC29150-5.0 Dropout Characteristics
OUTPUT VOLTAGE
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE
OUTPUT CURRENT
TEMPERATURE (°C) ILOAD 1.5A
IOUT 10mA IOUT 1.5A
INPUT VOLTAGE
MIC2915x Ground Current Output Current
MIC2915x Ground Current Supply Voltage
MIC2915x Ground Current Supply Voltage
GROUND CURRENT (mA)
SUPPLY VOLTAGE MIC29152 IOUT 1.5A
GROUND CURRENT (mA)
GROUND CURRENT (mA)
VOUT ILOAD 10mA
OUTPUT CURRENT
SUPPLY VOLTAGE
MIC2915x Ground Current Temperature
MIC2915x Ground Current Temperature
MIC2915x Ground Current Temperature
GROUND CURRENT (mA)
TEMPERATURE (°C) ILOAD 1.5A
TEMPERATURE (°C) ILOAD 10mA
GROUND CURRENT (mA)
GROUND CURRENT (µA)
TEMPERATURE (°C) ILOAD 250mA
MIC29150-3.3 Output Voltage Temperature
3.40 OUTPUT VOLTAGE 3.38 3.36
CURRENT
MIC29150-3.3 Short Circuit Current Temperature
MIC2915x Ground Current Input Voltage
GROUND CURRENT (µA) -0.2 INPUT VOLTAGE RLOAD VOUT
TEMPERATURE (°C) VOUT
3.34 3.32 3.30 3.28 3.26 3.24 3.22 DEVICES
3.20 TEMPERATURE (°C)
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
MIC29151-xx/2 Enable Current Temperaure
OUTPUT (mV)
ENABLE CURRENT (µA)
TEMPERATURE (°C)
-200 -0.5
COUT
OUTPUT (mV)
MIC2915x Load Transient
-100 -200 -0.5
MIC2915x Load Transient
COUT
OUTPUT
ILOAD 10mA
OUTPUT
ILOAD 10mA
TIME (ms)
TIME (ms)
MIC29152/3 Adjust Current Temperature
OUTPUT (mV)
ADJUST CURRENT (nA) ILOAD 10mA
MIC2915x Line Transient
COUT
OUTPUT (mV)
MIC2915x Line Transient
-0.2 TIME (ms) ILOAD 10mA COUT
INPUT
TEMPERATURE (°C)
-0.2 TIME (ms)
MIC2915x Output Impedance Frequency
OUTPUT IMPEDANCE
0.01
10x100
100x100
1x103
10x103
100x103
FREQUENCY (Hz)
March 2000
1x106
0.001
INPUT
ILOAD 10mA
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Typical Characteristics MIC2930x
MIC2930x Dropout Voltage Output Current
0.40
MIC2930x Dropout Voltage Temperature
MIC29300-3.3 Dropout Characteristics
OUTPUT VOLTAGE
DROPOUT VOLTAGE
DROPOUT VOLTAGE
0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 OUTPUT CURRENT
TEMPERATURE (°C) ILOAD
ILOAD 10mA ILOAD
INPUT VOLTAGE
MIC2930x Ground Current Output Current
MIC2930x Ground Current Supply Voltage
MIC2930x Ground Current Supply Voltage
GROUND CURRENT (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
FIXED 3.3V DEVICE RLOAD
FIXED 3.3V IOUT
OUTPUT CURRENT
SUPPLY VOLTAGE
SUPPLY VOLTAGE
MIC2930x Ground Current Temperature
MIC2930x Ground Current Temperature
MIC2930x Ground Current Temperature
GROUND CURRENT (mA)
TEMPERATURE (°C) IOUT
GROUND CURRENT (mA)
TEMPERATURE (°C)
GROUND CURRENT (mA)
IOUT 250mA
IOUT 10mA
TEMPERATURE (°C)
MIC29300-3.3 Output Voltage Temperature
3.40 OUTPUT VOLTAGE 3.38 3.36 CURRENT 3.34 3.32 3.30 3.28 3.26 3.24 DEVICES
MIC29300-5.0 Short Circuit Current Temperature
GROUND CURRENT (mA)
MIC2930x Ground Current Input Voltage
VOUT
3.22 3.20 TEMPERATURE (°C)
RLOAD -0.5 INPUT VOLTAGE
TEMPERATURE (°C)
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
MIC29301-x/2 Enable Current Temperaure
OUTPUT OUTPUT (mV)
ENABLE CURRENT (µA) TEMPERATURE (°C)
MIC2930x Load Transient
COUT
OUTPUT OUTPUT (mV)
MIC2930x Load Transient
-100 ILOAD 10mA COUT
-200
ILOAD 10mA
TIME (ms)
TIME (ms)
MIC29302/3 Adjust Current Temperature
OUTPUT (mV)
ADJUST CURRENT (nA)
COUT
OUTPUT (mV)
ILOAD 10mA TEMPERATURE (°C)
MIC2930x Line Transient
MIC2930x Line Transient
COUT
INPUT
-0.2 TIME (ms)
INPUT
ILOAD 10mA
ILOAD 10mA
-0.2 TIME (ms)
MIC2930x Output Impedance Frequency
OUTPUT IMPEDANCE
0.01
10x100
100x100
1x103
10x103
100x103
FREQUENCY (Hz)
March 2000
1x106
0.001
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Typical Characteristics MIC2950x
MIC2950x Dropout Voltage Output Current
MIC2950x Dropout Voltage Temperature
MIC29500-3.3 Dropout Characteristics
OUTPUT VOLTAGE
DROPOUT VOLTAGE
DROPOUT VOLTAGE
OUTPUT CURRENT
TEMPERATURE (°C) ILOAD
ILOAD 10mA
ILOAD
INPUT VOLTAGE
MIC2950x Ground Current Output Current
MIC2950x Ground Current Supply Voltage
MIC2950x Ground Current Supply Voltage
GROUND CURRENT (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
OUTPUT CURRENT
FIXED 3.3V VERSIONS RLOAD
FIXED 3.3V VERSION ILOAD SUPPLY VOLTAGE
SUPPLY VOLTAGE
MIC2950x Ground Current Temperature
MIC2950x Ground Current Temperature
MIC2950x Ground Current Temperature
GROUND CURRENT (mA)
TEMPERATURE (°C) IOUT
GROUND CURRENT (mA)
IOUT 10mA TEMPERATURE (°C)
GROUND CURRENT (mA)
IOUT 500mA
TEMPERATURE (°C)
MIC29500-3.3 Output Voltage Temperature
3.40 OUTPUT VOLTAGE 3.38 3.36 CURRENT 3.34 3.32 3.30 3.28 3.26 3.24 DEVICES
MIC2950x-5.0 Short Circuit Current Temperature
MIC2950x Ground Current Input Voltage
GROUND CURRENT (mA)
RLOAD -0.5 INPUT VOLTAGE
VOUT
3.22 3.20 TEMPERATURE (°C)
TEMPERATURE (°C)
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
MIC29501-xx/2 Enable Current Temperaure
OUTPUT (mV)
ENABLE CURRENT (µA) TEMPERATURE (°C)
MIC2950x Load Transient
1000 -500 COUT OUTPUT (mV) 1500 -100
MIC2950x Load Transient
COUT
OUTPUT
ILOAD 10mA
OUTPUT
ILOAD 10mA
TIME (ms)
TIME (ms)
MIC29502/3 Adjust Current Temperature
OUTPUT (mV)
ADJUST CURRENT (nA) ILOAD 10mA
MIC2950x Line Transient
-100 -0.2 TIME (ms) ILOAD 10mA COUT OUTPUT (mV)
MIC2950x Line Transient
COUT
INPUT
TEMPERATURE (°C)
INPUT
ILOAD 10mA
-0.2 TIME (ms)
MIC2950x Output Impedance Frequency
OUTPUT IMPEDANCE
0.01
10x100
100x100
1x103
10x103
100x103
FREQUENCY (Hz)
March 2000
1x106
0.001
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Typical Characteristics MIC2975x
MIC2975x Dropout Voltage Output Current
MIC2975x Dropout Voltage Temperature
DROPOUT VOLTAGE
TEMPERATURE (°C)
MIC29750-3.3 Dropout Characteristics
OUTPUT VOLTAGE
DROPOUT VOLTAGE (mV)
OUTPUT CURRENT
ILOAD 10mA
ILOAD 7.5A
INPUT VOLTAGE
MIC2975x Ground Current Output Current
MIC2975x Ground Current Supply Voltage
FIXED 3.3V VERSION IOUT 10mA
MIC2975x Ground Current Supply Voltage
GROUND CURRENT (mA)
FIXED 3.3V VERSION ILOAD 7.5A SUPPLY VOLTAGE
GROUND CURRENT (mA)
GROUND CURRENT (mA)
OUTPUT CURRENT
SUPPLY VOLTAGE
MIC2975x Ground Current Temperature
MIC2975x Ground Current Temperature
MIC2975x Ground Current Temperature
GROUND CURRENT (mA)
GROUND CURRENT (mA)
TEMPERATURE (°C) IOUT 10mA
GROUND CURRENT (mA)
IOUT 7.5A
IOUT 250mA
TEMPERATURE (°C)
TEMPERATURE (°C)
MIC29750-3.3 Output Voltage Temperature
3.40 OUTPUT VOLTAGE 3.38 3.36 CURRENT 3.34 3.32 3.30 3.28 3.26 3.24 DEVICES
MIC29750-5.0 Short Circuit Current Temperature
VOUT TEMPERATURE (°C)
GROUND CURRENT (mA)
MIC2975x Ground Current Input Voltage
RLOAD -0.5 INPUT VOLTAGE
3.22 3.20 TEMPERATURE (°C)
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
MIC29751-xx/2 Enable Current Temperaure
OUTPUT (mV)
ENABLE CURRENT (µA) TEMPERATURE (°C)
MIC2975x Load Transient
1000 -500 10.0 -2.5 ILOAD 10mA COUT OUTPUT (mV) 1500 -100 -200 10.0 -2.5
MIC2975x Load Transient
COUT
OUTPUT
OUTPUT
ILOAD 10mA
TIME (ms)
TIME (ms)
MIC29752/3 Adjust Current Temperature
OUTPUT (mV)
ADJUST CURRENT (nA) ILOAD 10mA
MIC2975x Line Transient
-100 -0.2 TIME (ms) ILOAD 10mA COUT OUTPUT (mV)
MIC2975x Line Transient
COUT
INPUT
TEMPERATURE (°C)
INPUT
ILOAD 10mA
-0.2 TIME (ms)
MIC2975x Output Impedance Frequency
OUTPUT IMPEDANCE
0.01
10x100
100x100
1x103
10x103
100x103
FREQUENCY (Hz)
March 2000
1x106
0.001
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
First, calculate power dissipation regulator from these numbers device parameters from this datasheet.
Applications Information
MIC29150/29300/29500/29750 high performance low-dropout voltage regulators suitable moderate high-current voltage regulator applications. Their 300mV 400mV dropout voltage full load make them especially valuable battery powered systems high efficiency noise filters "post-regulator" applications. Unlike older NPN-pass transistor designs, where minimum dropout voltage limited base-emitter voltage drop collector-emitter saturation voltage, dropout performance output these devices limited merely saturation voltage. trade-off dropout voltage varying base drive requirement. Micrel's Super PNPprocess reduces this drive requirement merely load current. MIC29150-29750 family regulators fully protected from damage fault conditions. Current limiting provided. This limiting linear; output current under overload conditions constant. Thermal shutdown disables device when temperature exceeds 125°C maximum safe operating temperature. Transient protection allows device (and load) survival even when input voltage spikes between -20V +60V. When input voltage exceeds about 40V, overvoltage sensor temporarily disables regulator. output structure these regulators allows voltages excess desired output voltage applied without reverse current flow. MIC29xx1 MIC29xx2 versions offer logic level ON/OFF control: when disabled, devices draw nearly zero current. additional feature this regulator family common pinout: design's current requirement change down same board layout, these regulators have identical pinouts.
VOUT
IOUT 1.01VIN VOUT
Where ground current approximated IOUT. Then heat sink thermal resistance determined with this formula:
Where 125°C between 2°C/W. heat sink significantly reduced applications where minimum input voltage known large compared with dropout voltage. series input resistor drop excessive voltage distribute heat between this resistor regulator. dropout properties Micrel Super regulators allow very significant reductions regulator power dissipation associated heat sink without compromising performance. When this technique employed, capacitor least 0.1µF needed directly between input regulator ground. Please refer Application Note Application Hint further details examples thermal design heat sink specification. Capacitor Requirements stability minimum output noise, capacitor regulator output necessary. value this capacitor dependent upon output current; lower currents allow smaller capacitors. MIC29150-29750 regulators stable with following minimum capacitor values full load: Device Full Load Capacitor MIC29150 10µF MIC29300 10µF MIC29500 10µF MIC29750 22µF This capacitor need expensive type: aluminum electrolytics adequate. fact, extremely capacitors contribute instability. Tantalum capacitors recommended systems where fast load transient response important. Where regulator powered from source with high impedance, 0.1µF capacitor connected between Input recommended. This capacitor should have good characteristics above 250kHz. Minimum Load Current MIC29150-29750 regulators specified between finite loads. output current small, leakage currents dominate output voltage rises. following minimum load current swamps expected leakage current across operating temperature range:
Figure Linear regulators require only capacitors operation. Thermal Design Linear regulators simple use. most complicated design parameters consider thermal characteristics. Thermal design requires following application-specific parameters: Maximum ambient temperature, Output Current, IOUT Output Voltage, VOUT Input Voltage,
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
resistors used. Resistors quite large, because very high input impedance bias current sense comparator: resistor values calculated
Device
Minimum Load
MIC29150 MIC29300 MIC29500 10mA MIC29750 10mA Adjustable Regulator Design
1.240
Where desired output voltage. Figure shows component definition. Applications with widely varying load currents scale resistors draw minimum load current required proper operation (see above). Error Flag MIC29xx1 MIC29xx3 versions feature Error Flag, which looks output voltage signals error condition when this voltage drops below expected value. error flag open-collector output that pulls under fault conditions. sink 10mA. output voltage signifies number possible problems, including overcurrent fault (the device current limit) input voltage. flag output inoperative during overtemperature shutdown conditions. Enable Input MIC29xx1 MIC29xx2 versions feature enable (EN) input that allows ON/OFF control device. Special design allows "zero" current drain when device disabled-only microamperes leakage current flows. input TTL/CMOS compatible thresholds simple interfacing with logic, directly tied 30V. Enabling regulator requires approximately 20µA current.
MIC29152BT
10µF 22µF
VOUT
VOUT 1.235V R2)]
Figure Adjustable Regulator with Resistors adjustable regulator versions, MIC29xx2 MIC29xx3, allow programming output voltage anywhere between 1.25V maximum operating rating family.
March 2000
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Package Information
0.151 ±0.005 (3.84 ±0.13) 0.410 ±0.010 (10.41 ±0.25) 0.108 ±0.005 (2.74 ±0.13)
0.176 ±0.005 (4.47 ±0.13)
0.050 ±0.005 (1.27 ±0.13)
0.590 ±0.005 (14.99 ±0.13)
0.818 ±0.005 (20.78 ±0.13)
0.356 ±0.005 (9.04 ±0.13)
1.140 ±0.010 (28.96 ±0.25)
0.050 ±0.003 (1.27 ±.08) 0.100 ±0.005 (2.54 ±0.13)
0.030 ±0.003 (0.76 ±0.08)
0.018 ±0.008 (0.46 ±0.020)
0.100 ±0.020 (2.54 ±0.51) DIMENSIONS: INCH (MM)
3-Lead TO-220
0.405±0.005 0.065 ±0.010 20°±2° 0.050±0.005
0.176 ±0.005 0.050 ±0.005
0.360±0.005 0.600±0.025 SEATING PLANE 0.004 +0.004 -0.008
0.100 DIM. INCH
0.050
0.015 ±0.002
0.100 ±0.01
3-Lead TO-263
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
MOUNTING HOLE 0.125 (3.175)
0.190 0.210 (4.826 5.334) 0.620 0.640 (15.748 16.256) 0.180 0.200 (4.572 5.080)
0.160 0.180 (4.064 4.572) Dimensions: inch (mm)
0.860 0.880 (21.844 22.352)
0.250 (6.350)
0.780 0.820 (19.812 20.828)
0.040 0.060 (1.016 1.524)
0.070 0.090 (1.778 2.286) 0.110 0.130 (2.794 3.302)
0.070 0.090 (1.778 2.286)
0.025 0.035 (0.635 0.889)
0.200 (5.080)
3-Lead TO-247 (WT)
March 2000
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
0.150 ±0.005 (3.81 ±0.13) 0.400 ±0.015 (10.16 ±0.38) 0.108 ±0.005 (2.74 ±0.13) 0.241 ±0.017 (6.12 ±0.43)
0.177 ±0.008 (4.50 ±0.20) 0.050 ±0.005 (1.27 ±0.13)
0.578 ±0.018 (14.68 ±0.46)
SEATING PLANE
Typ. 0.550 ±0.010 (13.97 ±0.25)
0.067 ±0.005 (1.70 ±0.127) 0.268 (6.81 REF)
0.032 ±0.005 (0.81 ±0.13)
0.018 ±0.008 (0.46 ±0.20)
0.103 ±0.013 (2.62±0.33)
Dimensions: inch (mm)
5-Lead TO-220
0.405±0.005 0.065 ±0.010 20°±2° 0.050±0.005
0.176 ±0.005 0.060 ±0.005
0.360±0.005 0.600±0.025 SEATING PLANE 0.004 +0.004 -0.008
0.067±0.005 DIM. INCH
0.032 ±0.003
0.015 ±0.002
0.100 ±0.01
5-Lead TO-263
MIC29150/29300/29500/29750
March 2000
MIC29150/29300/29500/29750
MOUNTING HOLE 0.140 0.143 (3.56 3.63)
0.185 0.208 (4.70 5.28) 0.620 0.640 (15.75 16.26) 0.180 0.200 (4.57 5.08)
0.242 (6.15 BSC)
0.819 0.844 (20.80 21.44)
0.170 0.216 (4.32 5.49)
Dimensions: inch (mm)
0.780 0.800 (19.81 20.32)
0.040 0.055 (1.02 1.40)
0.100 (2.54 BSC)
0.080 0.100 (2.03 2.54) 0.016 0.031 (0.41 0.79)
5-Lead TO-247 (WT)
March 2000
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
MICREL INC. 1849 FORTUNE DRIVE JOSE, 95131
(408) 944-0800
(408) 944-0970
http://www.micrel.com
This information believed accurate reliable, however responsibility assumed Micrel infringement patents other rights third parties resulting from use. license granted implication otherwise under patent patent right Micrel Inc. 2000 Micrel Incorporated
MIC29150/29300/29500/29750
March 2000

MIC29150/29300/29500/29750 Series High-Current Low-Dropout Regula

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