MAX17231

PRODUCTION

2V–36V, Synchronous Dual Buck Controller with Integrated Boost and 20μA Quiescent Current

Synchronous Dual Buck Controller with the Wide VIN (2V to 42V) and Low IQ (20µA)

Part Models
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Part Details

  • Eliminates External Components and Reduces Total Cost
    • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
    • Simple External RC compensation for Stable Operation at Any Output Voltage
    • All-Ceramic Capacitor Solution: Ultra-Compact Layout
    • 180° Out-of-Phase Operation Reduces Output Ripple and Enables Cascaded Power Supplies
  • Reduces Number of DC-DC Controllers to Stock
    • Fixed Output Voltage with ±1% Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V)
    • 220kHz to 2.2MHz Adjustable Frequency with External Synchronization
    • Frequency Synchronization Input
  • Reduces Power Dissipation
    • 92% Peak Efficiency
    • 8µA (typ) in Shutdown
    • 20µA (typ) Quiescent Current in PFM Mode
  • Operates Reliably
    • 42V Input Voltage Transient Protection
    • Cycle-by-Cycle Current Limit, Thermal Shutdown
    • Supply Overvoltage and Undervoltage Lockout
    • Power-OK Monitor
    • Reduced EMI Emission with Spread-Spectrum Control
    • 50ns Minimum On-Time Guarantees PWM Operation at Low Duty Cycle at 2.2MHz
MAX17231
2V–36V, Synchronous Dual Buck Controller with Integrated Boost and 20μA Quiescent Current
MAX17230, MAX17231: Block Diagram
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Documentation

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Tools & Simulations

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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SIMPLIS Models 1


Evaluation Kits

MAX17231EVKIT

Evaluation Kit for the MAX17230/MAX17231

Features and Benefits

  • Dual, Synchronous Step-Down Controllers Operate at 180° Out-of-Phase to Reduce Switching Noise
  • Preboost Controller to Maintain Operation with Low Supply Voltage
  • 3.5V to 36V Wide Input Supply Range
  • Buck Output Voltage: 5V and 3.3V Fixed or Adjustable Between 1V and 10V
  • Current-Mode Controllers with Forced-PWM and Skip Modes
  • Resistor-Configurable Frequency Between 1MHz and 2.2MHz
  • Independent Enable Inputs
  • 85% Peak Efficiency at 12V Input in Skip-Mode
  • FSYNC Input and Power-Good Output
  • Proven 4-Layer 2oz Copper PCB Layout
  • Demonstrates 1937mil x 1702mil Solution Size
  • Fully Assembled and Tested

Product Details

The MAX17231 evaluation kit (EV kit) is a fully assembled and tested application circuit board for the MAX17231 high-voltage, dual synchronous step-down controller with preboost. The EV kit is set up to provide 5V and 3.3V from an input voltage ranging from 3.5V to 36V. The preboost circuit maintains the 10V supply rail for input voltages below 10V. Each buck rail can deliver up to 5A load current. Various jumpers are provided to help evaluate features of the MAX17231 IC.

Applications

  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • Wall Transformer Regulation

MAX17231EVKIT
Evaluation Kit for the MAX17230/MAX17231

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