MAQ5281 120VIN, 25mA, Ultra-Low IQ, High-PSRR Linear Regulator Automotive General Description The MAQ5281 high-performance linear regulator offers a very-wide input operating voltage range, up to 120V DC, and supplies an output current of up to 25mA. Ideal for high input voltage applications such as automotive, industrial and telecom, the MAQ5281 offers ±3% initial accuracy, extremely high-power supply rejection ratio (>90db) and ultra-low quiescent current of 6µA. The MAQ5281 is optimized for high-voltage line transients, making it ideal for harsh environment applications. The MAQ5281 is offered in both fixed output voltage (3.3V/5.0V) and adjustable output voltage (1.27V to 5.5V) options. The MAQ5281 operates over a −40ºC to +125ºC temperature range and is available in lead-free, RoHScompliant, 8-pin ePad MSOP package. This part is also AEC-Q100 qualified for automotive applications. Data sheet and support documentation are found on the Micrel website: www.micrel.com. Features • • • • • • • • • • AEC-Q100 qualified Wide input voltage range: 6V to 120V DC Ultra-low quiescent current: 6µA (typ) 25mA guaranteed output current Adjustable output from 1.27V to 5.5V Withstands up to +120V DC at the input Stable with ceramic capacitors Ultra-high PSRR >90dB Ultra-high line transient rejection (load dump) High output accuracy: – ±3% initial accuracy • Thermal-shutdown and current-limit protection • Thermally-efficient, 8-pin ePad MSOP package Applications • Automotive • Remote keyless entry power supply • Telecom applications ___________________________________________________________________________________________________________ Typical Applications Quiescent Supply Current vs. Input Voltage QUIESCENT CURRENT (µA) 12 11 10 9 8 7 6 5 4 3 2 VOUT = 5V 1 IOUT = 0 0 0 20 40 60 80 100 120 INPUT VOLTAGE (V) 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 2, 2014 Revision 2.0 Micrel, Inc. MAQ5281 Ordering Information Part Number Output Voltage Top Mark Temperature Range Package Lead Finish Adjustable 7Q1A –40°C to +125°C 8-Pin ePad MSOP Pb-Free MAQ5281-3.3YMME 3.3V 7Q1S –40°C to +125°C 8-Pin ePad MSOP Pb-Free MAQ5281-5.0YMME 5.0V 7Q15 –40°C to +125°C 8-Pin ePad MSOP Pb-Free MAQ5281YMME Pin Configuration 8-Pin ePAD MSOP MAQ5281-x.xYMME 8-Pin ePAD MSOP MAQ5281YMME (TOP VIEW) (TOP VIEW) Pin Description MAQ5281YMME 1 Pin MAQ5281-x.xYMME 1 2, 3, 7 Name Function VIN Supply Voltage Input. Connect 1µF capacitor from VIN to GND. 2, 3, 7 NC Not internally connected. Connect NC to GND or leave unconnected. 4 4 CPSRR 5 5 GND 6 − FB Bypass Capacitor Connection. Connect 0.1µF capacitor from CPSRR to GND. Ground. Feedback Connection. For external resistor divider to set VOUT. − 6 SNS 8 8 VOUT Regulator Output. Connect 10µF capacitor from VOUT to GND. EP EP ePad Exposed Pad (ePad) for Thermal Relief. Connect EP to GND. October 2, 2014 Sense input. Connect SNS to VOUT. 2 Revision 2.0 Micrel, Inc. MAQ5281 Absolute Maximum Ratings(1) Operating Ratings(2) VIN to GND................................................... –0.3V to +125V VCPSRR to GND ..................................................–0.3 to +14V VFB, VSNS, VOUT to GND ................................... –0.3V to +6V Power Dissipation (PD) ........................... Internally Limited(3) Lead Temperature (soldering, 10s) .......................... +260°C Junction Temperature ......................... –40°C ≤ TJ ≤ +125°C Storage Temperature .........................–65°C ≤ TA ≤ +150°C ESD Ratings(4) HBM ......................................................................... 2kV MM ......................................................................... 200V VIN ................................................................. +6V to +120V VOUT Adjust Range ..................................... +1.27V to +5.5V Junction Temperature ......................... –40°C ≤ TJ ≤ +125°C Junction Thermal Resistance (θJA) 8-pin ePad MSOP .............................................. 64°C/W Electrical Characteristics(5) VIN = 12V, CIN = 1.0µF, CPSRR = 0.1µF, COUT = 10µF, IOUT = 100µA, TA = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted. Parameter Condition Min. Typ. Max. Units 120 V 11 µA Power Supply Input Input Voltage Range(6) Quiescent Supply Current 6 (7) IOUT = 0 6 Output Voltage Adjustable Output Voltage 1.27 Fixed 3.3V Fixed 5.0V 5.5 3.2 3.3 3.4 3.13 3.3 3.47 4.85 5.0 5.15 4.75 5.0 5.25 V −3 +3 % −5 +5 % Output Voltage Accuracy Variation from nominal VOUT Load Regulation IOUT = 100µA to 25mA −1.0 0.2 +1.0 % Line Regulation(8) VIN = 10V to 120V −0.5 0.04 +0.5 %/V 1.232 1.270 1.308 1.206 1.270 1.333 Feedback Input (Adjustable) FB Voltage FB Current VFB = 1.27V 3.2 V nA Current Limit Current Limit 30 VOUT = 0V 65 130 mA Ripple Rejection Power Supply Rejection Ratio October 2, 2014 f = 20kHz to 2MHz 90 3 dB Revision 2.0 Micrel, Inc. MAQ5281 Electrical Characteristics(5) (Continued) VIN = 12V, CIN = 1.0µF, CPSRR = 0.1µF, COUT = 10µF, IOUT = 100µA, TA = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted. Parameter Condition Min. Typ. Max. Units 2 3 V Power Dropout Voltage Dropout Voltage IOUT = 25mA Thermal-Shutdown Temperature TJ rising Thermal-Shutdown Hysteresis 157 °C 15 °C Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation at any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power dissipation results in excessive die temperature, and causes the regulator to enter thermal shutdown. 4. Devices are ESD sensitive; use proper handling precautions. Human body model, 1.5kΩ in series with 100pF. 5. Specifications are for packaged products only. 6. Assure that VIN ≥ (VOUT + 3V) and VIN ≥ 6V. 7. Quiescent current is specified for the adjustable option. Fixed output options will add approximately 1µA due to the internal feedback resistors. 8. Line regulation is a percentage of VOUT. October 2, 2014 4 Revision 2.0 Micrel, Inc. MAQ5281 Typical Characteristics 11.0 11.0 IOUT = 0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 9.0 VIN = 12V IOUT = 0mA 8.0 7.0 6.0 5.0 4.0 3.0 2.0 VOUT = 5V 5.10 IOUT = 5mA 5.05 5.00 4.95 4.90 4.85 0.0 0 100 80 60 40 20 120 -50 -25 0 25 50 75 100 0 125 OUTPUT VOLTAGE (V) VOUT = 5V 5.15 5.10 5.05 5.00 4.95 4.90 VOUT = 5V 5.15 IOUT = 5mA 5.10 5.05 5.00 4.95 4.90 4.85 4.85 4.80 4.80 5 15 10 20 -50 25 -25 OUTPUT CURRENT (mA) 0 25 50 75 100 1.50 1.00 0.50 0 125 5 2.0 1.9 1.8 1.7 20 25 FB Current vs. Input Voltage VOUT = 5V 4.5 VOUT = 5V IOUT = 5mA 4.0 VFB = 1.267V FB CURRENT (nA) FB VOLTAGE (V) 2.1 15 5.0 1.30 VOUT = 5V IOUT = 25mA 10 OUTPUT CURRENT (mA) 1.31 2.2 2.00 FB Voltage vs. Input Voltage Dropout Voltage vs. Temperature 2.3 120 VOUT = 5V ADJUSTABLE OPTION 2.50 TEMPERATURE (°C) 2.4 100 0.00 4.75 4.75 80 3.00 VIN = 12V 5.20 DROPOUT VOLTAGE (V) VIN = 12V 60 Dropout Voltage vs. Output Current 5.25 5.25 0 40 INPUT VOLTAGE (V) Output Voltage vs. Temperature Output Voltage vs. Output Current 5.20 20 TEMPERATURE (°C) INPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 5.15 VOUT = 5V 1.0 0.0 DROPOUT VOLTAGE (V) Output Voltage vs. Input Voltage VIN = 12V 10.0 VOUT = 5V QUIESCENT CURRENT (µA) QUIESCENT CURRENT (µA) 10.0 Quiescent Supply Current vs. Temperature OUTPUT VOLTAGE (V) Quiescent Supply Current vs. Input Voltage 1.29 1.28 1.27 1.26 3.5 3.0 2.5 2.0 1.5 1.25 1.0 1.6 1.24 1.5 0.5 1.23 1.4 -50 -25 0 25 50 75 TEMPERATURE (°C) October 2, 2014 100 125 0.0 0 20 40 60 80 INPUT VOLTAGE (V) 5 100 120 0 20 40 60 80 100 120 INPUT VOLTAGE (V) Revision 2.0 Micrel, Inc. MAQ5281 Typical Characteristics (Continued) 2.5 1.31 1.276 VIN = 12V FB CURRENT (nA) IOUT = 5mA 1.29 VIN = 12V VIN = 12V 2.0 VOUT = 5V 1.28 1.27 1.26 VOUT = 5.0V 1.274 VFB = 1.267V FB VOLTAGE (V) 1.30 FB VOLTAGE (V) FB Voltage vs. Output Current FB Current vs. Temperature FB Voltage vs. Temperature IOUT = 0 1.5 1.0 1.272 1.270 1.268 0.5 1.25 1.24 1.266 0.0 -50 -25 0 25 50 100 75 125 -50 -25 0 TEMPERATURE (°C) 75 100 0 125 VOUT = 0V 70 65 60 55 0.35 VOUT = 5V IOUT = 100µA 0.30 0.25 0.20 0.15 0.10 0.05 -50 0 -25 25 50 75 100 -25 0 25 50 75 100 TEMPERATURE (°C) TEMPERATURE (°C) Power Dissipation vs. Output Current Case Temperature (MME) vs. Output Current 0.20 125 0.16 VOUT = 4.5V 0.14 0.12 0.10 0.08 0.06 VIN = 12V 0.26 VOUT = 5V IOUT =100µA to 25mA 0.24 0.22 0.20 0.18 0.16 0.14 38 VOUT = 4.5V 36 -10 34 -30 32 30 -110 OUTPUT CURRENT (mA) 25 0 5 10 15 20 OUTPUT CURRENT (mA) 25 VOUT = 5V IOUT = 5mA CIN = None CPSRR = 0.1µF -70 24 20 125 COUT = 10µF 0.00 15 100 -50 0.02 10 75 VIN = 12V 10 -90 5 50 25 30 VIN = 12V 26 0 0 PSRR vs. Frequency 28 0.04 -25 TEMPERATURE (°C) PSRR (dB) CASE TEMPERATURE (°C) VIN = 12V 0.28 -50 40 0.18 25 0.10 -50 125 20 0.12 0.00 50 15 0.30 VIN = 10V to 120V LOAD REGULATION (%) LINE REGULATION (%/V) VIN = 12V 10 Load Regulation vs. Temperature 0.40 75 5 OUTPUT CURRENT (mA) Line Regulation vs. Temperature 80 CURRENT LIMIT (mA) 50 TEMPERATURE (°C) Current Limit vs. Temperature POWER DISSIPATION (W) 25 -130 0.01 0.1 1 10 100 1000 10000 FREQUENCY (kHz) Case Temperature*: The temperature measurement was taken at the hottest point on the MAQ5282 case mounted on a 2.25 square inch PCB at an ambient temperature of 25°C; see “Thermal Measurement” section. Actual results will depend upon the size of the PCB, ambient temperature and proximity to other heat emitting components. October 2, 2014 6 Revision 2.0 Micrel, Inc. MAQ5281 Functional Characteristics October 2, 2014 7 Revision 2.0 Micrel, Inc. MAQ5281 Functional Characteristics (Continued) October 2, 2014 8 Revision 2.0 Micrel, Inc. MAQ5281 Detailed Description The MAQ5281 voltage regulator accepts a 6V to 120V input and has an ultra-low 6µA typical quiescent current while offering an excellent line transient response and PSRR. These features make it ideal for harsh, noisy environments. All options of the device offer 25mA of output current. The MAQ5281YMME offer an adjustable output voltage from 1.27V to 5.5V. The MAQ52813.3YMME offer fixed 3.3V outputs and the MAQ52815.0YMME offer fixed 5.0V outputs. The YMME packaged devices feature a heat slug to more effectively remove heat from the die. Applications Information Thermal Protection The MAQ5281 has an internal thermal shutdown circuit to protect it from excessive heating of the die. When the junction temperature exceeds approximately +155°C, the output is disabled and the device begins to cool down. The device turns back on when the junction temperature cools by 15°C. This will result in a cycled output during continuous thermal-overload conditions. Current Limit The MAQ5281 features output current-limit protection. The output sustains a continuous short circuit to GND without damage to the device, but thermal shutdown often results. Output Voltage Setting For the MAQ5281YMME, VOUT is programmed from 1.27V to 5.5V using: R1 VOUT = VREF × + 1 R2 where VREF = 1.27V, and R1 and R2 are shown in the Typical Applications circuit. Thermal Measurements It is always wise to measure an IC’s case temperature to make sure that it is within operating limits, but it is easy to get erroneous results. The standard thermocouple that comes with many voltage meters uses a large wire gauge that behaves like a heat-sink, resulting in artificially low case temperature measurements. Use a thermocouple of 36-gauge wire or smaller, such as the Omega (5SC-TT-K36-36), to minimize the heat-sinking effect. Also, apply thermal compound to maximize heat transfer between the IC and the thermocouple. An infrared thermometer is a recommended alternative. The IR thermometer from Optris has a 1mm spot size, ideal for monitoring small surface mount packages. Also, the optional stand makes it easy to keep the beam on the IC for long periods of time. Input Capacitor Connect a 1µF capacitor from VIN to GND. Micrel recommends the C5750X7R2E105M, 1µF, 250V capacitor made by TDK. When using a different capacitor, assure that the voltage rating of the capacitor exceeds any potential transient. CPSRR Capacitor Connect a 0.1µF capacitor from CPSRR to GND to maintain high power supply rejection. The voltage rating of the capacitor must be at least 14V. Output Capacitor Connect a 10µF capacitor from VOUT to GND. Assure that the voltage rating of the capacitor exceeds the designed output voltage of the MAQ5281. October 2, 2014 9 Revision 2.0 Micrel, Inc. MAQ5281 Functional Diagram October 2, 2014 10 Revision 2.0 Micrel, Inc. MAQ5281 MAQ5281 Evaluation Board Schematic MAQ5281 Evaluation Board Schematic October 2, 2014 11 Revision 2.0 Micrel, Inc. MAQ5281 Bill of Materials Item C1 Part Number C5750X7R2E105 M C2 08053C104KAT2A C3 0805ZD106KAT2A C4, C5 Manufacturer TDK (1) (2) AVX AVX Description Qty. 1.0µF, 250V, 20%, X7R capacitor (2220) 1 0.1µF 25V 20%, X5R capacitor (0805) 1 10µF, 10V, 20%, X5R, capacitor (0805) 1 OPEN R1 CRCW06030000F R2 CRCW06032942F R3 R4 0 (3) Vishay/Dale 0Ω, 1% resistor, 0603 1 Vishay/Dale 29.4kΩ, 1% resistor, 0603 1 CRCW06031002F Vishay/Dale 10.0kΩ, 1% resistor, 0603 1 CRCW06031822F Vishay/Dale 18.2kΩ, 1%, resistor, 0603 1 R5 CRCW06033012F Vishay/Dale 30.1kΩ, 1% resistor chip, 0603 1 R6 CRCW06036982F Vishay/Dale 69.8kΩ, 1%, resistor, 0603 1 120VIN, 25mA, Ultra-Low IQ, High-PSRR Linear Regulator 1 U1 MAQ5281YMME Micrel (4) Notes: 1. TDK: www.tdk.com. 2. AVX.: www.avx.com. 3. Vishay Tel: www.vishay.com. 4. Micrel, Inc.: www.micrel.com. October 2, 2014 12 Revision 2.0 Micrel, Inc. MAQ5281 PCB Evaluation Board Layout Top Layer Silk Screen Top Layer Traces October 2, 2014 13 Revision 2.0 Micrel, Inc. MAQ5281 PCB Evaluation Board Layout (Continued) Bottom Layer Traces Bottom Layer Silk Screen October 2, 2014 14 Revision 2.0 Micrel, Inc. MAQ5281 PCB Evaluation Board Layout (Continued) EV Board Dimensions October 2, 2014 15 Revision 2.0 Micrel, Inc. MAQ5281 Package Information 8-Pin Exposed Pad (ePad) MSOP (MME) MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network of distributors and reps worldwide. Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2012 Micrel, Incorporated. October 2, 2014 16 Revision 2.0