Features and Benefits

  • Wide Operating Range Reduces Development Time
    • 8V to 60V Input-Voltage Range
    • 3V to 56V Output-Voltage Range
    • 120kHz to 1MHz Switching-Frequency Range
    • -40°C to +125°C Temperature Range
  • Integration Reduces Design Footprint
    • Internal LDO for Bias-Supply Generation
    • Synchronization Input
    • Current-Monitor Output
  • Robust Fault Protection Improves Quality and Simplifies System Design
    • Adjustable Input Undervoltage Lockout
    • Average and Cycle-by-Cycle Overcurrent Protection
    • Input Undervoltage-Fault Protection
    • Multiple Levels of Overvoltage Protection
    • Thermal Shutdown
  • Adjustable Slope Compensation
  • Multiphase Support
  • Small 5mm x 5mm, 32-pin TQFN, 0.5mm Pitch

Product Details

The MAX15157B belongs to the family of MAX15157 4-switch, buck–boost controllers. MAX15157B drives two external MOSFETs in half-bridge buck configuration. The output voltage can be dynamically set through the 1V to 2.2V reference input (REFIN) for modular design support.

The switching frequency is controlled either through an external resistor that sets the internal oscillator frequency, or by synchronizing the regulator to an external clock. The device is designed to support 120kHz to 1MHz switching frequencies. The controller has a dedicated undervoltage-lockout pin (UVLO) and an accurate enable-input threshold for flexible power-sequence configuration. The controller also has multiple fault-protection circuits to protect against overcurrent (OCP), output overvoltage (OVP), input UVLO and thermal shutdown.

The MAX15157B features an adjustable internal compensation ramp. The device incorporates an accurate current-sense amplifier that reports output current through an analog output (IMON). The device allows single-phase or multiphase (up to four-phase) operation.

The device is footprint compatible with MAX15157 and is available in a 5mm x 5mm, 32-pin TQFN package and supports a -40°C to +125°C junction temperature range.


  • Automotive
  • Communication
  • Industrial

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.