EVALUATION KIT AVAILABLE MAX20073/MAX20074 Single 2A/3A 2.2MHz Low-Voltage Step-Down DC-DC Converters General Description Benefits and Features The MAX20073/MAX20074 high-efficiency switching High-Feature Set in Ultra-Small Footprint regulator family delivers up to 3A load current from 0.5V to High-Efficiency DC-DC Converter 3.8V. The devices operate from an input voltage range of Up to 3A Output Current 2.7V to 5.5V, making them ideal for on-board point-of-load 2.7V to 5.5V Operating Supply Voltage and post-regulation applications. Total output error is less Resistor-Adjustable or Factory-Preset than 1.5% over load, line, and temperature. Output Voltage Synchronizable, 2.2MHz Switching-Frequency The devices feature fixed-frequency PWM mode of opera- tion, with a 2.2MHz switching frequency. High-frequency Enable Input RESET Output operation enables an all-ceramic capacitor design and Spread-Spectrum Enable Input small external components. Forced-PWM and Skip Modes The low-resistance on-chip switches ensure high efficiency Current-Mode Architecture at heavy loads while minimizing critical inductances, 3mm x 3mm x 0.85mm 10-Pin TDFN making the layout a much simpler task with respect to High Precision discrete solutions. Following a simple layout and footprint 107% Overvoltage Monitor ensures first-pass success in new designs. 93% Undervoltage Monitor The devices provide an enable input, spread-spectrum 1.5% Output-Voltage Accuracy enable input, and RESET output. The output voltage can Excellent Load Transient Performance be preset at the factory to allow customers to achieve Overtemperature and Short-Circuit Protection 1.5% output-voltage accuracy without using expensive -40C to +125C Operating Temperature Range 0.1% external resistors. In addition, the output voltage can be set to any customer value by using two external resistors at the feedback with 0.5V internal reference. The device offers a fixed 0.85ms soft-start time. The 10-pin TDFN exposed pad devices include Ordering Information appears at end of data sheet. overtemperature shutdown and overcurrent limiting. All devices are designed to operate over the -40C to +125C Typical Operating Circuit ambient temperature range. Applications VPV Automotive PV 1H 4.7F 3.3V EN LX Point-of-Load PGND VPV MAX20073 56.2k 10 10pF 22F MAX20074 AV OUT 1F 10k GND V PV 20K SYNC SSEN RESET EP 19-8556 Rev 1 7/18MAX20073/MAX20074 Single 2A/3A 2.2MHz Low-Voltage Step-Down DC-DC Converters Absolute Maximum Ratings PV to PGND ............................................................-0.3V to +6V Output Short-Circuit Duration ....................................Continuous AV to GND ...............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A RESET, OUT to GND ..............................................-0.3V to +6V 10-pin TDFN-EP (derate 24.4mW/C > 70C) .......... 1951mW SYNC, EN, SSEN to GND .............................-0.3V to PV +0.3V Operating Temperature Range ......................... -40C to +125C GND to PGND ......................................................-0.3V to +0.3V Junction Temperature ......................................................+150C LX Continuous RMS Current ..................................................4A Storage Temperature Range ............................ -40C to +150C LX to PGND (Note 1) ....................................-0.3V to PV + 0.3V Lead Temperature Range ................................................+300C 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. (Note 2) Package Thermal Characteristics Junction-to-Ambient Thermal Resistance ( ) ..............41C/W JA Junction-to-Case Thermal Resistance ( ) .....................9C/W JC Note 1: Self-protected from transient voltages exceeding these limits in circuit under normal operation. Note 2: 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 = 5.0V, V = 5.0V, V = 0V, . T = T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C AV PV EN SSEN A J A under normal conditions, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Supply Voltage Range V 2.7 5.5 V IN Supply Current I V = 0V 3 10 A SHDN EN Supply Current I V = 5V, V = 0V, no load 40 93 A IN EN SYNC V Rising 2.3 2.5 2.65 V UVLOR Undervoltage Lockout V Falling 2.2 2.4 2.55 V UVLOF Oscillator Frequency f 2.0 2.2 2.4 MHz SW SYNC Input Frequency Range f 1.8 2.6 MHz SYNC Spread-Spectrum Range SS V = V 3 % SSEN AV 0.04 x 0.12 x 0.20 x Skip Mode Peak Current I mA SKIP I I I LIM LIM LIM PWM mode, 0A I I LOAD MAX Voltage Accuracy V -1.5 +1.5 % OUT 2.7V V = V 5.5V AV PV OUT Bias Current I Adjustable mode -500 15 +500 nA OUT ADJ OUT Bias Current I Fixed mode 4 5 6 A OUT FIX DC Load Regulation L 0A I I (PWM Mode) 0.02 %/A D REG LOAD MAX DC Line Regulation L 2.7V V = V 5.5V 0.05 %/V N REG AV PV pMOS On-Resistance R V = V = 5V, I = 0.1A 30 60 120 m HS PV AV LX nMOS On-Resistance R V = V = 5V, I = 0.1A 20 38 80 m LS PV AV LX Maxim Integrated 2 www.maximintegrated.com