EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX20014 2.2MHz Sync Boost and Dual Step-Down Converters General Description Benefits and Features The MAX20014 is a high-efficiency three-output low- Multiple Functions for Small Size voltage DC-DC converter. OUT1 boosts the input supply up Synchronous 750mA Boost Converter to 8.5V at up to 750mA, while two synchronous step-down - Fixed from 3.8V to 8.5V in 100mV Steps converters operate from a 3.0V to 5.5V input voltage range Dual Synchronous Buck Converters Up to 3A and provides a 0.8V to 3.8V output voltage range at up to - Factory-Configurable Output Voltages from 0.8V to 3.8V in 25mV Steps 3A. The boost converter achieves 2% and the buck - Resistor Adjustable converters achieve 1.5% output error over load, line, 3.0V to 5.5V Operating Supply Voltage and temperature range. 2.2MHz Operation The device features a 2.2MHz fixed-frequency pulse-width Undervoltage Threshold of 93% 3% modulation (PWM) mode for better noise immunity and Overvoltage Threshold of 107% 3% load transient response, and a pulse-frequency modula- Individual RESET Outputs tion mode (skip) for increased efficiency during light-load High-Precision operation. The 2.2MHz frequency operation allows for the 1.5% Output-Voltage Accuracy use of all-ceramic capacitors and minimizes external com- Good Load Transient Performance for Buck Converters ponents footprint. The programmable spread-spectrum frequency modulation minimizes radiated electromag- Robust for the Automotive Environment netic emissions. Integrated low R switches improve DS(ON) Current Mode, Forced-PWM, and Skip Operation efficiency at heavy loads and make the layout a much Overtemperature and Short-Circuit Protection simpler task with respect to discrete solutions. 4mm x 4mm 24-Pin TQFN -40C to +125C Automotive Temperature Range The device is offered with factory-preset output voltages or resistor-adjustable output voltages. Other features include soft-start, overcurrent, and overtemperature protections. Ordering Information/Selector Guide appears at end of data sheet. Typical Operating Circuit REG1 EN1 0.33F EN3 OUT1 EN2 22F 3.3V SYNC 3.3V 10 LX1 PV 2.2H 4.7F 1F PGND1 GND MAX20014 3.3V PV 2:3 2x4.7F RESET1 /3 RESET3 0.47H 0.47H LX3 LX2 47F 47F OUT3 OUT2 PGND3 PGND2 19-8532 Rev 3 3/19MAX20014 2.2MHz Sync Boost and Dual Step-Down Converters Absolute Maximum Ratings PV2, PV3 to PGND ...............................................-0.3V to +6V GND to PGND ......................................................-0.3V to +0.3V PV to GND...............................................................-0.3V to +6V LX1 Continuous RMS Current ................................................2A REG1 to GND..........................................-0.3V to V + 0.3V LX2, LX3 Continuous RMS Current .......................................3A OUT1 EN1EN3, SYNC to GND ...........................-0.3V to V + 0.3V Output Short-Circuit Duration ....................................Continuous PV RESET1RESET3, GND ........................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A OUT1 to PGND1 ...................................................-0.3V to +10V TQFN-EP (derate 30.3 mW/C > +70C) ..................2222mW OUT2 to PGND2 ....................................... -0.3V to V + 0.3V Operating Temperature .................................... -40C to +125C PV2 OUT3 to PGND3 ....................................... -0.3V to V + 0.3V Junction Temperature ......................................................+150C PV3 LX1 to PGND1.........................................-0.3V to V + 0.3V Storage Temperature Range ............................ -65C to +150C OUT1 LX2 to PGND2........................................... -0.3V to V + 0.3V Lead Temperature Range ................................................+300C PV2 LX3 to PGND3........................................... -0.3V to V + 0.3V PV3 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 1) Junction-to-Ambient Thermal Resistance ( ) ..............36C/W Junction-to-Case Thermal Resistance ( ) .....................3C/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = V = V = 3.3V, EN1 = EN2 = EN3 = 3.3V. T = T = -40C to +125C, unless otherwise noted. Typical values are at PV PV2 PV3 A J T = +25C under normal conditions, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V Fully operational 3.0 5.5 V IN UVLO Rising 2.7 2.9 R Undervoltage Lockout (UVLO) V UVLO Falling 2.4 2.6 F Shutdown Supply Current I EN1EN3 = low 1 2.2 5 A IN-SHDN EN1 = high, I = 0mA, skip, OUT1 I 70 135 210 IN1 V 2% above regulation point OUT1 EN2 = high, I = 0mA, skip, OUT2 Supply Current I 40 80 160 A IN2 V 2% above regulation point OUT2 EN3 = high, I = 0mA, skip, OUT3 I 40 80 160 IN3 V 2% above regulation point OUT3 PWM Switching Frequency f Internally generated 2.0 2.2 2.4 MHz SW Spread Spectrum SS Factory option enabled 3 % OUT1 SYNCHRONOUS DC-DC BOOST CONVERTER Voltage Accuracy V I = 0A to I , 3.0V V 3.6V -2 +2 % OUT1 LOAD MAX IN pMOS On-Resistance R V = V = 3.3V, I = 0.1A 125 250 500 m HS1 PV PV2 LX1 nMOS On-Resistance R V = V = 3.3V, I = 0.1A 75 150 300 m LS1 PV PV2 LX1 nMOS Current-Limit Threshold I 1.6 2 A LIM1 pMOS Turn-Off Threshold I 15 50 90 mA ZX1 Maxim Integrated 2 www.maximintegrated.com