MAX20034ATIS/VY+ Analog Devices

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX20034 High-Efficiency 2.2MHz, 36V, Dual Buck Controller with 17A Quiescent Current General Description Benefits and Features The MAX20034 is an automotive 2.2MHz, dual synchro- Meets Stringent OEM Module Power-Consumption nous step-down controller IC that provides two high- and Performance Specifications voltage, synchronous step-down controllers that operate 17A Quiescent Current in Skip Mode 180 out-of-phase. The IC operates with a 3.5V to 42V 1.5% Output-Voltage Accuracy: 5.0V/3.3V Fixed, input-voltage supply and can function in dropout condition or Adjustable Between 1V and 10V by running at 99% duty cycle. It is intended for applications Enables Crank-Ready Designs with mid- to high-power requirements that perform at a Wide 3.5V to 36V Input Supply Range wide input voltage range, such as during automotive cold- EMI Reduction Features Reduce Interference with crank or engine stop-start conditions. Sensitive Radio Bands without Sacrificing Wide Input The ICs step-down controllers operate at up to 2.2MHz Voltage Range frequency to allow small external components, reduced 50ns (typ) Minimum On-Time Guarantees Skip- output ripple, and to guarantee no AM band interference. Free Operation for 3.3V Output from a Car Battery The switching frequency is resistor adjustable (220kHz at 2.2MHz to 2.2MHz). SYNC input programmability enables three Spread-Spectrum Option frequency modes for optimized performance: forced Frequency-Synchronization Input fixed-frequency operation, skip mode with ultra-low Resistor-Programmable Frequency Between quiescent current, and synchronization to an external 220kHz and 2.2MHz clock. The IC is also available with spread-spectrum Integration and Thermally Enhanced Packages Save frequency modulation to minimize EMI interference. Board Space and Cost The IC features a power-OK monitor, overvolt- Dual, Up to 2.2MHz Step-Down Controllers age lockout, and undervoltage lockout. Protection 180 Out-of-Phase Operation features include cycle-by-cycle current limit and Current-Mode Controllers with Forced-PWM thermal shutdown. The MAX20034 is specified (FPWM) and Skip Modes for operation over the -40C to +125C automotive Thermally Enhanced, 28-Pin TQFN-EP Package temperature range. Protection Features Improve System Reliability Supply Overvoltage and Undervoltage Lockout Applications Overtemperature and Short-Circuit Protection POL Applications for Automotive Power Distributed DC Power Systems Navigation and Radio Head Units Ordering Information appears at end of data sheet. 19-100159 Rev 2 4/18MAX20034 High-Efficiency 2.2MHz, 36V, Dual Buck Controller with 17A Quiescent Current Simplified Block Diagram PGOOD1 COMP1 DC-DC1 PGOOD LOW LEVEL CONTROL LOGIC PGOOD HIGH LEVEL PGOOD COMP MAX20034 FB1 FEEDBACK- EAMP1 SELECT LOGIC INTERNAL SOFT-START EN1 V = 1V BST1 REF PWM1 OUT1 DH1 PWM1 80mV (TYP) MAX STEP-DOWN DC-DC1 CSA1 CLK1 LX1 DIFFERENTIAL INPUT GATE-DRIVE CS1 ZX1 LOGIC DL1 CL ZERO- SLOPE- EN1 CURRENT-LIMIT CROSS COMP LOGIC THRESHOLD COMP LX1 LX1 PGND1 CLK1 FOSC OSCILLATOR IN SPREAD-SPECTRUM EXTERNAL OPTION AVAILABLE WITH CLOCK INPUT INTERNAL CLOCK ONLY BIAS INTERNAL LINEAR BIAS REGULATOR CONNECTED HIGH (PWM MODE) FSYNC FSYNC-SELECT LOGIC IF 3.25V < CONNECTED LOW (SKIP MODE) V < 5.2V EXTVCC EXTVCC SWITCHOVER AGND CLK 180 OUT-OF-PHASE CLK2 EN2 BST2 COMP2 PWM2 FB2 DH2 CLK2 OUT2 STEP-DOWN DC-DC2 DC-DC2 CONTROL LOGIC LX2 CS2 ZX2 SAME AS DC-DC1 ABOVE GATE-DRIVE EN2 DL2 LOGIC PGOOD2 LX2 PGND2 LX2 EP Maxim Integrated 2 www.maximintegrated.com