EVALUATION KIT AVAILABLE MAX16932/MAX16933 2.2MHz, 36V, Dual Buck with 20A Quiescent Current General Description Benefits and Features The MAX16932/MAX16933 offer two high-voltage, Meets Stringent OEM Module Power Consumption synchronous step-down controllers that use only 20A of and Performance Specifications quiescent current with no load. They operate with an input 20A Quiescent Current in Skip Mode voltage supply from 3.5V to 42V and can operate in drop- 1% Output-Voltage Accuracy: 5.0V/3.3V Fixed or out condition by running at 95% duty cycle. The devices Adjustable Between 1V and 10V are intended for applications with mid- to high-power Enables Crank-Ready Designs requirements and requiring two independently controlled Wide Input Supply Range from 3.5V to 36V output supplies, such as automotive applications. EMI Reduction Features Reduce Interference with The MAX16932/MAX16933 step-down controllers oper- Sensitive Radio Bands without Sacrificing Wide Input ate 180 out-of-phase for reduced input ripple. The Voltage Range devices also operate with switching frequencies up to 50ns (typ) Minimum On-Time Guarantees Skip- 2.2MHz to allow use of small external components and Free Operation for 3.3V Output from Car Battery to guarantee no AM band interference. The FSYNC input at 2.2MHz programmability enables three frequency modes for opti- Spread-Spectrum Option mized performance: forced fixed-frequency operation, Frequency-Synchronization Input skip mode with ultra-low quiescent current (20A), and Resistor-Programmable Frequency Between synchronization to an external clock. The devices provide 200kHz and 2.2MHz a spread-spectrum option to minimize EMI interference. Integration and Thermally Enhanced Packages Save The devices also feature a power-OK monitor and over- Board Space and Cost voltage and undervoltage lockout. Protection features Dual, 2MHz Step-Down Controllers include cycle-by-cycle current limit and thermal shutdown. 180 Out-of-Phase Operation Current-Mode Controllers with Forced-Continuous The devices are available in a 28-pin TQFN-EP package and Skip Modes and are specified for operation over the -40C to +125C Thermally Enhanced 28-Pin TQFN-EP Package automotive temperature range. Protection Features Improve System Reliability Supply Overvoltage and Undervoltage Lockout Ordering Information and Selector Guide appears at end of Overtemperature and Short-Circuit Protection data sheet. Applications POL Applications for Automotive Power Distributed DC Power Systems Navigation and Radio Head Units 19-6716 Rev 10 9/17MAX16932/MAX16933 2.2MHz, 36V, Dual Buck with 20A Quiescent Current Absolute Maximum Ratings IN, EN1, EN2, TERM to PGND ...........................-0.3V to +42V LX to PGND .......................................................-0.3V to +42V CS1, CS2, OUT1, OUT2 to AGND ........................-0.3V to +11V PGND to AGND ..................................................-0.3V to +0.3V CS1 to OUT1 ........................................................-0.2V to +0.2V PGOOD1, PGOOD2 to AGND...........................-0.3V to +6.0V CS2 to OUT2 ........................................................-0.2V to +0.2V Continuous Power Dissipation (T = +70C) A BIAS, FSYNC, FOSC to AGND............................-0.3V to +6.0V TQFN (derate 28.6mW/NC above +70C) .............2285.7mW COMP1, COMP2 to AGND ..................................-0.3V to +6.0V Operating Temperature Range....................... -40C to +125C FB1, FB2, EXTVCC to AGND ..............................-0.3V to +6.0V Junction Temperature Range ..........................................+150C DL to PGND .....................................................-0.3V to +6.0V Storage Temperature Range ............................ -65C to +150C BST , to LX ........................................................-0.3V to +6.0V Lead Temperature (soldering, 10s) .................................+300C DH to LX ...........................................................-0.3V to +6.0V Soldering Temperature (reflow).....................................+260C 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) TQFN Junction-to-Ambient Thermal Resistance ( ) ..........35C/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 = 14V, V = 5V, C = 6.8F, T = T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C under IN BIAS BIAS A J A normal conditions, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT SYNCHRONOUS STEP-DOWN DC-DC CONTROLLERS Normal operation 3.5 36 Supply Voltage Range V V IN t < 1s 42 FB rising (Note 3) +10 +15 +20 Output Overvoltage Threshold % FB falling +5 +10 +15 V = V = 0V, T = +25C 8 20 EN1 EN2 A V = V = 0V, T = +125C 20 EN1 EN2 A V = 5V, V = 5V, V = 0V EN1 OUT1 EN2 30 40 V = 5V, no switching EXTVCC Supply Current I A IN V = 5V, V = 3.3V V = 0V, EN2 OUT2 EN1 20 30 V = 3.3V, no switching EXTVCC V = V = 5V, V = 5V, V = EN1 EN2 OUT1 OUT2 25 40 3.3V, V = 3.3V, no switching EXTVCC V = V , PWM mode 4.95 5 5.05 FB1 BIAS Buck 1 Fixed Output Voltage V V OUT1 V = V , skip mode 4.95 5 5.075 FB1 BIAS V = V , PWM mode 3.234 3.3 3.366 FB2 BIAS Buck 2 Fixed Output Voltage V V OUT2 V = V , skip mode 3.234 3.3 3.4 FB2 BIAS Output Voltage Adjustable Range Buck 1, buck 2 1 10 V Maxim Integrated 2 www.maximintegrated.com