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MIC29302A Dataheets PDF



Part Number MIC29302A
Manufacturers Micrel
Logo Micrel
Description 3A Fast-Response LDO Regulator
Datasheet MIC29302A DatasheetMIC29302A Datasheet (PDF)

MIC29302A 3A Fast-Response LDO Regulator General Description The MIC29302A is a high-current, low-cost, low-dropout voltage regulator that uses Micrel's proprietary Super βeta PNP® process with a PNP pass element. The 3A LDO regulator features 450mV (full load) dropout voltage and very low ground current. Designed for high-current loads, these devices also find applications in lower current, lowdropout critical systems, where their dropout voltages and ground current values are important attrib.

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MIC29302A 3A Fast-Response LDO Regulator General Description The MIC29302A is a high-current, low-cost, low-dropout voltage regulator that uses Micrel's proprietary Super βeta PNP® process with a PNP pass element. The 3A LDO regulator features 450mV (full load) dropout voltage and very low ground current. Designed for high-current loads, these devices also find applications in lower current, lowdropout critical systems, where their dropout voltages and ground current values are important attributes. Along with a total accuracy of ±2% (over temperature, line, and load regulation) the regulator features very fast transient recovery from input voltage surges and output load current changes. The MIC29302A has an adjustable output that can be set by two external resistors to a voltage between 1.24V and 15V. In addition, the device is fully protected against overcurrent faults, reversed input polarity, reversed lead insertion, and overtemperature operation. A TTL logic enable (EN) pin is available in the MIC29302A to shutdown the regulator. When not used, the device can be set to continuous operation by connecting EN to the input (IN). The MIC29302A is available in the standard and 5-pin TO-263 and TO-252 packages with an operating junction temperature range of −40°C to +125°C. Datasheets and support documentation can be found on Micrel’s website at: www.micrel.com. Features • High-current capability − 3A over full temperature range • Low-dropout voltage of 450mV at full load • Low ground current • Accurate 1% guaranteed tolerance • Extremely fast transient response • Zero-current shutdown mode • Error flag signals output out-of-regulation • Adjustable output voltage • Packages: TO-263-5L and TO-252-5L Applications • Processor peripheral and I/O supplies • High-efficiency “green” computer systems • Automotive electronics • High-efficiency linear lower supplies • Battery-powered equipment • PC add-in cards • High-efficiency post-regulator for switching supply _________________________________________________________________________________________________________________________ Typical Application VOUT = 1.242 ×  R1 + 1  R2  DROPOUT VOLTAGE (mV) Dropout Voltage vs. Output Current 500 400 VIN = 3.3V VADJ = 0V 300 TA = 25ºC 200 100 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT (A) Super ßeta 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 October 3, 2014 Revision 2.0 Micrel, Inc. Ordering Information Part Number MIC29302AWU MIC29302AWD Voltage Adjustable Adjustable Pin Configuration Junction Temperature Range –40°C to +125°C –40°C to +125°C MIC29302A Package 5-Pin TO-263 5-Pin TO-252 5-Pin TO-263 (D2Pak) Adjustable Voltage (U) MIC29302AWU 5-Pin TO-252 (D-Pak) Adjustable Voltage (D) MIC29302AWD Pin Description Pin Number TO-263 1 2 3, TAB 4 5 Pin Number TO-252 1 2 3, TAB 4 5 Pin Name Pin Function EN IN GND OUT ADJ Enable (Input): Active-high CMOS compatible control input. Do not float. INPUT: Unregulated input, +3V to +16V maximum GND: TAB is also connected internally to the IC’s ground on both packages. OUTPUT: The regulator output voltage Feedback Voltage: 1.24V feedback from external resistor divider. October 3, 2014 2 Revision 2.0 Micrel, Inc. MIC29302A Absolute Maximum Ratings(1) Input Supply Voltage (VIN)(1) ........................... –20V to +20V Enable Input Voltage (VEN)................................ –0.3V to VIN Lead Temperature (soldering, 5 sec.) ........................ 260°C Power Dissipation .....................................Internally Limited Storage Temperature Range ....................–65°C to +150°C ESD Rating all pins(3) Operating Ratings(2) Operating Junction Temperature .............. −40°C to +125°C Operating Input Voltage ....................................... 3V to 16V Package Thermal Resistance TO-263 (θJC).........................................................3°C/W TO-252 (θJC).........................................................3°C/W TO-252 (θJA) ......................................................35°C/W TO-263 (θJA).......................................................28°C/W Electrical Characteristics(4) VIN = 4.2V; IOUT = 100mA; TA = 25°C, bold values indicate −40°C≤ TJ ≤ +125°C, unless noted. Parameter Condition Min. Typ. Max. Units Output Voltage Output Voltage Accuracy(5) 100mA ≤ IOUT ≤3A, (VOUT + 1V) ≤ VIN ≤ 16V −2 2% Line Regulation IOUT = 100mA, (VOUT + 1V) ≤ VIN ≤ 16V 0.1 0.5 % Load Regulation VIN = VOUT + 1V, 100mA ≤ IOUT ≤ 3A 0.2 1 % IOUT = 100mA 80 200 IOUT = 750mA 220 Dropout Voltage(6) Ground Current IOUT = 1.5A IOUT = 2.0A IOUT = 2.5A IOUT = 3A 275 mV 375 630 430 720 450 800 IOUT = 750mA, VIN = VOUT + 1V 5 20 Ground Current IOUT = 1.5A 15 mA IOUT = 3A 60 150 IGRNDDO Ground Pin Current @ Dropout Current Limit VIN = 0.5V less than specified VOUT × IOUT .


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