MAX17233ETIR+ Analog Devices

EVALUATION KIT AVAILABLE MAX17232/MAX17233 3.5V36V, 2.2MHz, Synchronous Dual Buck Con- troller with 20A Quiescent Current General Description Benefits and Features The MAX17232/MAX17233 offers dual synchronous step- Eliminates External Components and Reduces Total Cost down DC-DC controllers with integrated MOSFETs. They No Schottky-Synchronous Operation for High operates over a 3.5V to 36V input voltage range with 42V Efficiency and Reduced Cost Simple External RC Compensation for Stable input transient protection, and can operate in dropout condition by running at 95% duty cycle. The controllers Operation at Any Output Voltage All-Ceramic Capacitor Solution: Ultra-Compact Layout can generate fixed output voltages of 3.3V/5V, along with the capability to program the output voltage between 180 Out-of-Phase Operation Reduces Output Ripple and Enables Cascaded Power Supplies 1V to 10V. Reduces Number of DC-DC Controllers to Stock These devices use a current-mode-control architecture. The devices can be operated in pulse-width modulation Fixed Output Voltage with 1% Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V) (PWM) or pulse-frequency modulation (PFM) control 220kHz to 2.2MHz Adjustable Frequency with schemes. PWM operation provides constant frequency External Synchronization operation at all loads, and is useful in applications Frequency Synchronization Input sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at Reduces Power Dissipation light loads for high efficiency. The low-resistance, on-chip 92% Peak Efficiency MOSFETs ensure high efficiency at full load and simplify 8A (typ) in Shutdown the layout. 20A (typ) Quiescent Current in PFM Mode The devices are available in a 28-pin TQFN-EP package Operates Reliably with exposed pad, and are specified for operation over 42V Input Voltage Transient Protection -40C to +85C. Cycle-by-Cycle Current Limit, Thermal Shutdown Supply Overvoltage and Undervoltage Lockout Applications Power-OK Monitor Distributed Supply Regulation Reduced EMI Emission with Spread-Spectrum Control Wall Transformer Regulation 50ns (typ) Minimum On-Time Guarantees PWM General-Purpose Point-of-Load Operation at Low Duty Cycle at 2.2MHz Ordering Information and Selector Guide appears at end of data sheet. 19-8366 Rev 1 10/17MAX17232/MAX17233 3.5V36V, 2.2MHz, Synchronous Dual Buck Controller with 20A Quiescent Current Typical Application Circuit R PGOOD1 FB1 PGOOD1 DL1 CS1 COUT1 OUT1 OUT1 R * CS1 OUT1 CS1 CS1 LX1 L1 BST1 EN1 DH1 MAX17232 PGND2 MAX17233 FSYNC BIAS PGND1 FOSC EXTVCC COMP1 OUT1 V BAT IN AGND CIN COMP2 DH2 EN2 BST2 R * L2 CS2 OUT2 LX2 CS2 CS2 OUT2 OUT2 COUT2 CS2 DL2 PGOOD2 FB2 PGND2 *DCR SENSE IS ALSO AN OPTION. Maxim Integrated 2 www.maximintegrated.com