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60V Current-Mode Buck Controller with Lossless Current Sense

Achieve High-Voltage KW Designs with Highest Efficiency and Density with Industry's First HV-Coupled Buck

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 8
VIN (V) (max) 60
VOUT1 (V) (min) 3
VOUT1 (V) (max) 57
Switch Type External
Output Adjust. Method Adjustable
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 60-1000
Package/Pins TQFN/32
Budgetary
Price (See Notes)
5.29
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 8
VIN (V) (max) 60
VOUT1 (V) (min) 3
VOUT1 (V) (max) 57
Switch Type External
Output Adjust. Method Adjustable
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 60-1000
Package/Pins TQFN/32
Budgetary
Price (See Notes)
5.29

Key Features

  • Wide Operating Range Reduces Development Time
    • 8V to 60V Input Voltage Range
    • 3V to 0.95 × VIN Output Voltage Range
    • 60kHz to 1MHz Switching Frequency Range
    • Interleaved 1/2/3/4/6/8-Phase Operation
    • -40°C to +125°C Temperature Range
  • Integration Reduces Design Footprint
    • Internal LDO for Bias Supply Generation
    • Synchronization Input
    • Current Monitor Output
    • Internal 2V Precision Reference
    • 2Ω Pullup and 0.6Ω Pulldown Fast Power FET Drivers
    • Accurate MOSFET Dead Time Adaptive Control
  • Robust Fault Protection Improves Quality and Simplifies System Design
    • Adjustable Input Undervoltage Lockout
    • Adjustable Input EN
    • Adjustable Cycle-by-Cycle OvercurrentProtection
    • Input Undervoltage Fault Protection
    • Multiple Levels of Overvoltage Protection
    • Thermal Shutdown
  • Flexible, Simple System Design
    • Adjustable Slope Compensation
    • Discrete Inductor or Compact Coupled Inductor Architecture
    • Lossless RDSON or Resistor Current Sensing
  • Small 5mm × 5mm, 32-Pin TQFN, 0.5mm Pitch
  • Applications/Uses

    • Automotive
    • Datacenter
    • Industrial
    • Multiphase Buck

    Description

    The MAX15157D is the evolution of the MAX15157B HV buck controller family. The MAX15157D implements a single-phase, PWM valley current-mode controller and drives two external power MOSFETs in a 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 external resistor that sets the internal oscillator, or by synchronizing the regulator to an external clock. The device is designed to support 60kHz 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) adjustable through the ILIM pin, output overvoltage (OVP), input undervoltage (UVLO), and thermal shutdown.

    The MAX15157D features an adjustable internal compensation ramp. The device incorporates an accurate current-sense amplifier that reports output current through an analog output (IMON).

    The MAX15157D features lossless LS FET RDSON or resistor current sensing. The device allows programmable single-phase or multiphase operation, up to eight interleaved phases, and implements an accurate current balance scheme. The MAX15157D can operate with either discrete inductors or coupled inductors in case of multiphase operation.

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

    Simplified Block Diagram

    MAX15157D: Typical Application Circuit MAX15157D: Typical Application Circuit Zoom icon

    Technical Docs

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .