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 eta 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 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 DS20005685A-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) DS20005685A-page 2 5 4 3 2 1 ADJ OUT GND IN FLG 2016 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 10F Tantalum CIN *R1 CIN EN ADJ *R2 GND GND + 10F 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 Microchip Technology Inc. DS20005685A-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 (<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. MIC2915X/30X/50X/75X TABLE 1-1: ELECTRICAL CHARACTERISTICS (Note 1, Note 2) Electrical Characteristics: VIN = VOUT + 1V; IOUT = 10 mA; TJ = +25C. Bold values indicate -40C TJ +125C, unless noted. Parameter Min. Typ. Max. -1 -- 1 -2 -- 2 Line Regulation -- 0.06 Load Regulation -- VO/T Output Voltage Symbol VOUT Dropout Voltage VOUT = -1% (Note 5) Ground Current (Note 6) Ground Pin Current at Dropout IGND 2016 Microchip Technology Inc. ILIM Conditions IOUT = 10 mA % 10 mA IOUT IFL, (VOUT + 1V) VIN 26V (Note 3) 0.5 % IOUT = 10 mA, (VOUT + 1V) VIN 26V 0.2 1 % VIN = VOUT + 1V, 10 mA IOUT 1.5A (Note 3, Note 4) -- 20 100 ppm/C -- 80 200 MIC2915x IOUT = 100 mA -- 220 -- MIC2915x IOUT = 750 mA -- 350 600 -- 80 175 -- 250 -- -- 370 600 -- 125 250 -- 250 -- -- 370 600 -- 80 200 -- 270 -- -- 425 750 MIC2975x IOUT = 7.5A -- 8 20 MIC2915x IOUT = 750 mA, VIN = VOUT + 1V -- 22 -- MIC2915x IOUT = 1.5A -- 10 35 MIC2930x IOUT = 1.5A, VIN = VOUT + 1V -- 37 -- -- 15 50 MIC2950x IOUT = 2.5A, VIN = VOUT + 1V -- 70 -- MIC2950x IOUT = 5A -- 35 75 MIC2975x IOUT = 4A, VIN = VOUT + 1V 120 -- MIC2975x IOUT = 7.5A Output Voltage (Note 4) Temperature Coefficient MIC2915x IOUT = 1.5A MIC2930x IOUT = 100 mA MIC2930x IOUT = 1.5A mV MIC2930x IOUT = 3A MIC2950x IOUT = 250 mA MIC2950x IOUT = 2.5A MIC2950x IOUT = 5A MIC2975x IOUT = 250 mA MIC2975x IOUT = 4A mA MIC2930x IOUT = 3A -- 0.9 -- MIC2915x, VIN = 0.5V less than specified VOUT x IOUT = 10 mA -- 1.7 -- MIC2930x, VIN = 0.5V less than specified VOUT x IOUT = 10 mA -- 2.1 -- MIC2950x, VIN = 0.5V less than specified VOUT x IOUT = 10 mA -- 3.1 -- MIC2975x, VIN = 0.5V less than specified VOUT x IOUT = 10 mA -- 2.1 3.5 MIC2915x, VOUT = 0V, (Note 7) -- 4.5 5.0 -- 7.5 10.0 -- 9.5 15.0 IGRNDDO Current Limit Units mA A MIC2930x, VOUT = 0V, (Note 7) MIC2950x, VOUT = 0V, (Note 7) MIC2975x, VOUT = 0V, (Note 7) DS20005685A-page 5 MIC2915X/30X/50X/75X TABLE 1-1: ELECTRICAL CHARACTERISTICS (Note 1, Note 2) (CONTINUED) Electrical Characteristics: VIN = VOUT + 1V; IOUT = 10 mA; TJ = +25C. Bold values indicate -40C TJ +125C, unless noted. Parameter Symbol Min. Typ. Max. -- 400 -- -- 260 -- -- 2 10 -- -- 30 1.228 1.240 1.252 V 1.215 -- 1.265 VMAX 1.203 -- 1.277 V Note 8 -- 40 80 -- -- 120 nA -- Reference Voltage Temperature Coefficient -- 20 -- ppm/C Adjust Pin Bias Current Temperature Coefficient -- 0.1 -- nA/C en, Output Noise Voltage (10 Hz to 100 kHz) IL = 100 mA Ground Current in Shutdown Units VRMS A Conditions CL = 10 F CL = 33 F MIC29150/1/2/3 only VEN = 0.4V Reference - MIC29xx2/MIC29xx3 Reference Voltage Reference Voltage Adjust Pin Bias Current -- Note 9 -- Flag Output (Error Comparator) - MIC29xx1/29xx3 Output Leakage Current Output Low Voltage Upper Threshold Voltage Lower Threshold Voltage Hysteresis DS20005685A-page 6 VOL -- 0.01 1.00 -- -- 2.00 -- 220 300 -- -- 400 40 60 -- 25 -- -- -- 75 95 -- -- 140 -- 15 -- A VOH = 26V mV Device set for 5V, VIN = 4.5V IOL = 250 A mV Device set for 5V, (Note 10) mV Device set for 5V, (Note 10) mV Device set for 5V, (Note 10) 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X TABLE 1-1: ELECTRICAL CHARACTERISTICS (Note 1, Note 2) (CONTINUED) Electrical Characteristics: VIN = VOUT + 1V; IOUT = 10 mA; TJ = +25C. Bold values indicate -40C TJ +125C, unless noted. Parameter Symbol Min. Typ. Max. Units Conditions Input Logic Voltage Low (OFF) -- -- 0.8 V -- Input Logic Voltage High (ON) 2.4 -- -- V -- -- 100 600 -- -- 750 0.7 -- 2 -- -- 4 -- 10 500 ENABLE Input - MIC29xx1/MIC29xx2 Enable Pin Input Current Regulator Output Current in Shutdown VEN = 26V A VEN = 0.8V A VEN 0.8V and VIN 26V, VOUT = 0. Specification for packaged product only. 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. 3: Full load current (IFL) is defined as 1.5A for the MIC2915x, 3A for the MIC2930x, 5A for the MIC2950x, and 7.5A for the MIC2975x families. 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. 5: 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. 6: 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. 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: VREF VOUT (VIN - 1V), 2.3V VIN 26V, 10 mA < IL IFL, TJ TJMAX. 9: 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 a 200 mA load pulse at VIN = 20V (a 4W pulse) for T = 10 ms. 10: 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 95 mV x 5V/1.240V = 384 mV. 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. Note 1: 2: 2016 Microchip Technology Inc. DS20005685A-page 7 MIC2915X/30X/50X/75X TEMPERATURE SPECIFICATIONS (Note 1) Parameters Sym. Min. Typ. Max. Units Conditions Storage Temperature Range TS -65 -- +150 C Operating Junction Temperature TJ -40 -- +125 C -- Lead Temperature -- -- -- +260 C Soldering, 5 sec. Thermal Resistance TO-220 JC -- 2 -- C/W -- Thermal Resistance TO-263 JC -- 2 -- C/W -- Thermal Resistance TO-247 JC -- 1.5 -- C/W -- Thermal Resistance TO-252 JC -- 3 -- C/W -- Thermal Resistance TO-252 JA -- 56 -- C/W -- Temperature Ranges -- Package Thermal Resistance Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +125C rating. Sustained junction temperatures above +125C can impact the device reliability. DS20005685A-page 8 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X 2.0 Note: TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. FIGURE 2-1: MIC2915x Dropout Voltage vs. Output Current. FIGURE 2-4: MIC2915x Ground Current vs. Output Current. FIGURE 2-2: vs. Temperature. MIC2915x Dropout Voltage FIGURE 2-5: MIC2915x Ground Current vs. Supply Voltage. FIGURE 2-3: Characteristics. MIC29150-5.0 Dropout FIGURE 2-6: MIC2915x Ground Current vs. Supply Voltage. 2016 Microchip Technology Inc. DS20005685A-page 9 MIC2915X/30X/50X/75X FIGURE 2-7: vs. Temperature. MIC2915x Ground Current FIGURE 2-10: MIC29150-3.3 Output Voltage vs. Temperature. FIGURE 2-8: vs. Temperature. MIC2915x Ground Current FIGURE 2-11: MIC29150-3.3 Short-Circuit Current vs. Temperature. FIGURE 2-9: vs. Temperature. MIC2915x Ground Current FIGURE 2-12: vs. Input Voltage. DS20005685A-page 10 MIC2915x Ground Current 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X FIGURE 2-13: MIC29151-xx/2 Enable Current vs. Temperature. FIGURE 2-16: MIC29152/3 Adjust Pin Current vs. Temperature. FIGURE 2-14: MIC2915x Load Transient. FIGURE 2-17: MIC2915x Line Transient. FIGURE 2-15: MIC2915x Load Transient. FIGURE 2-18: MIC2915x Line Transient. 2016 Microchip Technology Inc. DS20005685A-page 11 MIC2915X/30X/50X/75X FIGURE 2-19: MIC2915x Output Impedance vs. Frequency. FIGURE 2-22: MIC2930x Dropout Voltage vs. Output Current. FIGURE 2-20: vs. Temperature. FIGURE 2-23: vs. Temperature. MIC2930x Dropout Voltage FIGURE 2-24: Characteristics. MIC29300-3.3 Dropout MIC29152 Ground Current FIGURE 2-21: MIC29152 Dropout Voltage vs. Output Current. DS20005685A-page 12 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X FIGURE 2-25: MIC2930x Ground Current vs. Output Current. FIGURE 2-28: vs. Temperature. MIC2930x Ground Current FIGURE 2-26: MIC2930x Ground Current vs. Supply Voltage. FIGURE 2-29: vs. Temperature. MIC2930x Ground Current FIGURE 2-27: MIC2930x Ground Current vs. Supply Voltage. FIGURE 2-30: vs. Temperature. MIC2930x Ground Current 2016 Microchip Technology Inc. DS20005685A-page 13 MIC2915X/30X/50X/75X FIGURE 2-31: MIC29300-3.3 Output Voltage vs. Temperature. FIGURE 2-34: MIC29301-xx/2 Enable Current vs. Temperature. FIGURE 2-32: MIC29300-5.0 Short-Circuit Current vs. Temperature. FIGURE 2-35: MIC2930x Load Transient. FIGURE 2-33: vs. Input Voltage. FIGURE 2-36: MIC2930x Load Transient. DS20005685A-page 14 MIC2930x Ground Current 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X FIGURE 2-37: MIC29302/3 Adjust Pin Current vs. Temperature. FIGURE 2-40: MIC2930x Output Impedance vs. Frequency. FIGURE 2-38: MIC2930x Line Transient. FIGURE 2-41: MIC2930x IOUT vs. VIN - VOUT SOA (TO-263). FIGURE 2-39: MIC2930x Line Transient. FIGURE 2-42: (TO-263). 2016 Microchip Technology Inc. MIC2930x IOUT vs. TA SOA DS20005685A-page 15 MIC2915X/30X/50X/75X FIGURE 2-43: MIC2930x Short-Circuit SOA vs. Temperature (TO-263). FIGURE 2-46: Characteristics. FIGURE 2-44: MIC2950x Dropout Voltage vs. Output Current. FIGURE 2-47: MIC2950x Ground Current vs. Output Current. FIGURE 2-45: vs. Temperature. FIGURE 2-48: MIC2950x Ground Current vs. Supply Voltage. DS20005685A-page 16 MIC2950x Dropout Voltage MIC29500-3.3 Dropout 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X FIGURE 2-49: MIC2950x Ground Current vs. Supply Voltage. FIGURE 2-52: vs. Temperature. FIGURE 2-50: vs. Temperature. MIC2950x Ground Current FIGURE 2-53: MIC29500-3.3 Output Voltage vs. Temperature. FIGURE 2-51: vs. Temperature. MIC2950x Ground Current FIGURE 2-54: MIC2950x-5.0 Short-Circuit Current vs. Temperature. 2016 Microchip Technology Inc. MIC2950x Ground Current DS20005685A-page 17 MIC2915X/30X/50X/75X FIGURE 2-55: vs. Input Voltage. MIC2950x Ground Current FIGURE 2-58: MIC2950x Load Transient. FIGURE 2-56: MIC29501-xx/2 Enable Current vs. Temperature. FIGURE 2-59: MIC29502/3 Adjust Pin Current vs. Temperature. FIGURE 2-57: FIGURE 2-60: DS20005685A-page 18 MIC2950x Load Transient. MIC2950x Line Transient. 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X FIGURE 2-64: vs. Temperature. MIC2975x Dropout Voltage FIGURE 2-62: MIC2950x Output Impedance vs. Frequency. FIGURE 2-65: Characteristics. MIC29751-3.3 Dropout FIGURE 2-63: MIC2975x Dropout Voltage vs. Output Current. FIGURE 2-66: MIC2975x Ground Current vs. Output Current. FIGURE 2-61: MIC2950x Line Transient. 2016 Microchip Technology Inc. DS20005685A-page 19 MIC2915X/30X/50X/75X FIGURE 2-67: MIC2975x Ground Current vs. Supply Voltage. FIGURE 2-70: vs. Temperature. MIC2975x Ground Current FIGURE 2-68: MIC2975x Ground Current vs. Supply Voltage. FIGURE 2-71: vs. Temperature. MIC2975x Ground Current FIGURE 2-69: vs. Temperature. FIGURE 2-72: MIC29751-3.3 Output Voltage vs. Temperature. DS20005685A-page 20 MIC2975x Ground Current 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X FIGURE 2-73: MIC29751-5.0 Short-Circuit Current vs. Temperature. FIGURE 2-76: MIC2975x Load Transient. FIGURE 2-74: vs. Input Voltage. FIGURE 2-77: MIC2975x Load Transient. MIC2975x Ground Current FIGURE 2-75: MIC29751-xx/2 Enable Current vs. Temperature. 2016 Microchip Technology Inc. FIGURE 2-78: MIC29752 Adjust Pin Current vs. Temperature. DS20005685A-page 21 MIC2915X/30X/50X/75X FIGURE 2-79: MIC2975x Line Transient. FIGURE 2-80: MIC2975x Line Transient. FIGURE 2-81: MIC2975x Output Impedance vs. Frequency. DS20005685A-page 22 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1 and Table 3-2. TABLE 3-1: PIN FUNCTION TABLE Pin Number TO-220 TO-263 Pin Name 1 INPUT 2 GND 3 OUTPUT TABLE 3-2: Description Supplies the current to the output power device. TAB is also connected internally to the IC's ground on D-PAK. The regulator output voltage. PIN FUNCTION TABLE Pin Number Fixed TO-220 TO-247 TO-263 Pin Number Adjustable TO-220 TO-247 TO-252 TO-263 Pin Number Adj. w/ Flag TO-220 TO-247 TO-263 Pin Name 1 1 -- ENABLE Description CMOS compatible control input. Logic-high = enable, logic-low = shutdown. 2 2 2 INPUT 3, TAB 3, TAB 3, TAB GND 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. 2016 Microchip Technology Inc. Supplies the current to the output power device. TAB is also connected internally to the IC's ground on D-PAK. DS20005685A-page 23 MIC2915X/30X/50X/75X 4.0 APPLICATION INFORMATION 4.1 Thermal Design The MIC2915x, MIC2930x, MIC2950x, and MIC2975x are high-performance low-dropout voltage regulators suitable for all moderate to high-current voltage regulator applications. Their 350 mV to 425 mV 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. Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Thermal design requires the following application-specific parameters: A trade-off for the low-dropout voltage is a varying base driver requirement. But Microchip's Super eta PNP process reduces this drive requirement to merely 1% of the load current. EQUATION 4-1: The MIC2915x/2930x/2950x/2975x family of regulators are fully protected from damage due to fault conditions. Current limiting is provided. This limiting is linear; output current under overload conditions is constant. Thermal shutdown disables the device when the die temperature exceeds the +125C maximum safe operating temperature. Line transient protection allows device and load survival even when the input voltage spikes between -20V and +60V. When the input voltage exceeds approximately 32V, the overvoltage sensor disables the regulator. The output structure of these regulators allows voltages in excess of the desired output voltage to be applied without reverse current flow. MIC29xx1 and MIC29xx2 versions offer a logic-level ON/OFF control. When disabled, the devices draw nearly zero current. An additional feature of this regulator family is a common pinout. A design's current requirement may change up or down, but use the same board layout because all of these regulators have identical pinouts. MIC29xxx VIN IN OUT VOUT GND FIGURE 4-1: Linear Regulators Require Only Two Capacitors for Operation. * * * * Maximum Ambient Temperature, TA Output Current, IOUT Output Voltage, VOUT Input Voltage, VIN First, calculate the power dissipation of the regulator from these numbers and the device parameters from this data sheet. P D = I OUT 1.01 V IN - V OUT The ground current is approximated by 1% of IOUT. Then the heat sink thermal resistance is determined with Equation 4-2. EQUATION 4-2: T JMAX - T A SA = --------------------------- - JC + CS PD Where: TJMAX 125C CS Between 0C/W and 2C/W The heat sink may be significantly reduced in applications where the minimum input voltage is known and is large compared with the dropout voltage. Use a series input resistor to drop excessive voltage and distribute the heat between this resistor and the regulator. The low-dropout properties of Super eta PNP regulators allow very significant reductions in regulator power dissipation and the associated heat sink without compromising performance. When this technique is employed, a capacitor of at least 0.1 F is needed directly between the input and regulator ground. Please refer to Application Note 9 and Application Hint 17 for further details and examples on thermal design and heat sink specification. With no heat sink in the application, calculate the junction temperature to determine the maximum power dissipation that will be allowed before exceeding the maximum junction temperature of the MIC29152. The maximum power allowed can be calculated using the DS20005685A-page 24 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X thermal resistance (JA) of the D-Pak adhering to the following criteria for the PCB design: 2 oz. copper and 100 mm2 copper area for the MIC29152. For example, given an expected maximum ambient temperature (TA) of +75C with VIN = 3.3V, VOUT = 2.5V, and IOUT = 1.5A, first calculate the expected PD using Equation 4-3: EQUATION 4-3: This capacitor need not be an expensive low ESR type: aluminum electrolytics are adequate. In fact, extremely low ESR capacitors may contribute to instability. Tantalum capacitors are recommended for systems where fast load transient response is important. Where the regulator is powered from a source with high AC impedance, a 0.1 F capacitor connected between Input and GND is recommended. This capacitor should have good characteristics to above 250 kHz. 4.3 P D = 3.3V - 2.5V 1.5A - 3.3V 0.016A = 1.1472W Next, calculate the junction temperature for the expected power dissipation. The MIC2915x-2975x regulators are specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. The following minimum load current swamps any expected leakage current across the operating temperature range, as shown in Table 4-2. TABLE 4-2: EQUATION 4-4: T J = JA P D + T A o o o = 56 C/W 1.1472W + 75 C = 139.24 C Now determine the maximum power dissipation allowed that would not exceed the IC's maximum junction temperature (+125C) without the use of a heat sink. EQUATION 4-5: P D MAX = T J MAX - T A JA o o Capacitor Requirements For stability and minimum output noise, a capacitor on the regulator output is necessary. The value of this capacitor is dependent upon the output current; lower currents allow smaller capacitors. The MIC2915x/2930x/2950x/2975x regulators are stable with the following minimum capacitor values at full load, as noted in Table 4-1. TABLE 4-1: 4.4 MINIMUM LOAD CURRENTS Device Minimum Load MIC2915x 5 mA MIC2930x 7 mA MIC2950x 10 mA MIC2975x 10 mA Adjustable Regulator Design The adjustable regulator versions, MIC29xx2 and MIC29xx3, allow programming the output voltage anywhere between 1.25V and the 25V. Two resistors are used. The resistor values are calculated by Equation 4-6. o = 125 C - 75 C 56 C/W = 0.893W 4.2 Minimum Load Current MINIMUM CAPACITOR VALUES AT FULL LOAD Device Full-Load Capacitor MIC2915x 10 F MIC2930x 10 F MIC2950x 10 F MIC2975x 22 F 2016 Microchip Technology Inc. EQUATION 4-6: V OUT -1 R1 = R2 ------------ 1.240 In the equation above, VOUT is the desired output voltage. Figure 4-2 shows component definition. Applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation (see the Minimum Load Current sub-section). DS20005685A-page 25 MIC2915X/30X/50X/75X MIC29152 VIN VOUT R1 10F 22F R2 FIGURE 4-2: Resistors. 4.5 Adjustable Regulator with Error Flag MIC29xx1 and MIC29xx3 versions feature an Error Flag, which looks at the output voltage and signals an error condition when this voltage drops 5% below its expected value. The error flag is an open-collector output that pulls low under fault conditions. It may sink 10 mA. Low output voltage signifies a number of possible problems, including an overcurrent fault (the device is in current-limit) and low input voltage. The flag output is inoperative during overtemperature shutdown conditions. 4.6 Enable Input MIC29xx1 and MIC29xx2 versions feature an enable (EN) input that allows ON/OFF control of the device. Special design allows "zero" current drain when the device is disabled; only microamperes of leakage current flows. The EN input has TTL/CMOS compatible thresholds for simple interfacing with logic, or may be directly tied to 30V. Enabling the regulator requires approximately 20 A of current. DS20005685A-page 26 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X 5.0 PACKAGING INFORMATION 5.1 Package Marking Information 3- and 5-Pin TO-263 (Fixed)* XXXXXXXX X.XXX WNNNP 5-Pin TO-263 (Adjustable)* XXX XXXXXXX WNNNP 3- and 5-Pin TO-220 (Fixed)* XXXXX X.XXX WNNNP 5-Pin TO-220 (Adjustable)* XXX XXXXXXX WNNNP 2016 Microchip Technology Inc. Example MIC29150 3.3WU 8943P Example MIC 29152WU 6235P Example 29301 5.0WT 1586P Example MIC 29302WT 7404P DS20005685A-page 27 MIC2915X/30X/50X/75X 5-Pin TO-252* Example XXX XXXXXXX WNNNP<BS1><COO> MIC 29152WD 3102P USA 5-Pin TO-247 (Fixed)* Example XXXXX XXXXXXXX-X.XXXX WNNNP <COO> YYWWNNN 5-Pin TO-247 (Adjustable)* XXXXX XXXXXXXXXXX WNNNP <COO> YYWWNNN Legend: XX...X Y YY WW NNN e3 * MICREL MIC29751-3.3WWT 5943P USA 1642815 Example MICREL MIC29752WWT 2359P USA 1521108 Product code or customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC(R) designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. , , Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) and/or Overbar () symbol may not be to scale. DS20005685A-page 28 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X 3-Lead TO-220 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. 2016 Microchip Technology Inc. DS20005685A-page 29 MIC2915X/30X/50X/75X 5-Lead TO-220 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. DS20005685A-page 30 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X 5-Lead TO-263 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. 2016 Microchip Technology Inc. DS20005685A-page 31 MIC2915X/30X/50X/75X 3-Lead TO-263 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. DS20005685A-page 32 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X 5-Lead TO-247 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. 2016 Microchip Technology Inc. DS20005685A-page 33 MIC2915X/30X/50X/75X 5-Lead TO-252 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. DS20005685A-page 34 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X APPENDIX A: REVISION HISTORY Revision A (December 2016) * Converted Micrel document MIC2915x/30x/50x/ 75x to Microchip data sheet DS20005685A. * Minor text changes throughout. * Removed references to the discontinued MIC29750. * Added Figure 2-41, Figure 2-42, and Figure 2-43. * Removed the 3-Pin TO-247 package option. 2016 Microchip Technology Inc. DS20005685A-page 35 MIC2915X/30X/50X/75X NOTES: DS20005685A-page 36 2016 Microchip Technology Inc. MIC2915X/30X/50X/75X PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. PART NO. - XX Device Device: Voltage: X Junction Voltage Package Temperature Range MIC2915x: MIC2930x: MIC2950x: MIC2975x: 3.3 = 5.0 = 12 = (blank) = 3.3V 5.0V 12V Adjustable W = -40C to +125C Package: U T D WT = = = = 3-Lead or 5-Lead TO-263 3-Lead or 5-Lead TO-220 5-Lead TO-252 5-Lead TO-247 TR = TR = (blank)= (blank)= - Examples: XX 2,500/Reel for D and WT Packages 750/Reel for U Package 50/Tube for U, T, and D Packages 30/Tube for WT Package a) MIC29150-3.3WT: Media Type 1.5A High-Current Low-Dropout Regulator 3A High-Current Low-Dropout Regulator 5A High-Current Low-Dropout Regulator 7.5A High-Current Low-Dropout Regulator Junction Temperature Range: Media Type: X 1.5A High-Current LowDropout Regulator, 3.3V, -40C to +125C Temperature Range, 3-Lead TO-220, 50/Tube b) MIC29152WD-TR: 1.5A High-Current LowDropout Regulator, Adjustable Voltage, -40C to +125C Temperature Range, 5-Lead TO-252, 2,500/Reel c) MIC29302WU: 3A High-Current LowDropout Regulator, Adjustable Voltage, -40C to +125C Temperature Range, 5-Lead TO-263, 50/Tube d) MIC29301-12WU-TR: 3A High-Current LowDropout Regulator, 12V, -40C to +125C Temperature Range, 5-Lead TO-263, 750/Reel e) MIC29500-5.0WT: 5A High-Current LowDropout Regulator, 5.0V, -40C to +125C Temperature Range, 3-Lead TO-220, 50/Tube f) MIC29503WT: 5A High-Current LowDropout Regulator, Adjustable Voltage, -40C to +125C Temperature Range, 5-Lead TO-220, 50/Tube g) MIC29751-3.3WWT-TR:7.5A High-Current LowDropout Regulator, 3.3V, -40C to +125C Temperature Range, 5-Lead TO-247, 2,500/Reel h) MIC29752WWT: 7.5A High-Current LowDropout Regulator, Adjustable Voltage, -40C to +125C Temperature Range, 5-Lead TO-247, 30/Tube Note 1: 2016 Microchip Technology Inc. Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. DS20005685A-page 37 MIC2915X/30X/50X/75X NOTES: DS20005685A-page 38 2016 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: * Microchip products meet the specification contained in their particular Microchip Data Sheet. * Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. * There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. * Microchip is willing to work with the customer who is concerned about the integrity of their code. * Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable." Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated. Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified. QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV Trademarks The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BeaconThings, BitCloud, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KEELOQ, KEELOQ logo, Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, RightTouch, SAM-BA, SpyNIC, SST, SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip Technology Incorporated in the U.S.A. Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, chipKIT, chipKIT logo, CodeGuard, CryptoAuthentication, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, Mindi, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, QMatrix, RightTouch logo, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. (c) 2016, Microchip Technology Incorporated, All Rights Reserved. ISBN: 978-1-5224-1236-6 == ISO/TS 16949 == 2016 Microchip Technology Inc. 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