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60V Current-Mode Buck Controller with Accurate Current Report

60V Current-Mode Buck Controller with Integrated Current Monitor

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.

Key Features

  • 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

Applications/Uses

  • Automotive
  • Communication
  • Industrial
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 8
VIN (V) (max) 60
VOUT1 (V) (min) 3
VOUT1 (V) (max) 56
Switch Type External
Output Adjust. Method Dyn. REF In
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools EE-Sim
Package/Pins TQFN/32
Budgetary
Price (See Notes)
$2.57 @1k
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Simplified Block Diagram

MAX15157B: Typical Application Circuit MAX15157B: Typical Application Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX15157B evaluation kit (EV kit) is a fully assembled and tested circuit board that contains all components necessary to evaluate the performance of the MAX15157B. The device is a high-efficiency step-down and/or step-up regulator. The EV kit is powered from a 15V to 60V DC supply. It is capable of delivering from 5V to 32V at 15A or 200W (max) and at a 600kHz switching frequency. Refer to the MAX15157B data sheet to set the switching frequency and input/output voltage ranges for the EV kit.

View Details

Features

  • 15V to 60V Input-Voltage Range (Changeable from 8V to 60V)
  • 5V to 32V Output-Voltage Range (Changeable from 3V to 52V)
  • Adjustable Slope Compensation Ramp
  • Precision High-Side Current Sense for Output Current Monitor
  • Multiphase Operation Up to 4 Phases
  • Adjustable Switching Frequency: 120kHz to 1MHz Range
  • External Switching Frequency Clock Synchronization
  • External REFIN Input for Output Adjustment
  • Hiccup Fault Protection for Overcurrent
  • Thermal Shutdown
  • POW-OK Output (Power-Good Output)
  • Adjustable Input UVLO, and Output OVP Voltage
  • Adjustable Soft-Start, and Soft-Stop
  • Monotonic Startup into Prebiased Output

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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) 56
Switch Type External
Output Adjust. Method Dyn. REF In
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools EE-Sim
Package/Pins TQFN/32
Budgetary
Price (See Notes)
$2.57 @1k

Key Features

  • 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

Applications/Uses

  • Automotive
  • Communication
  • Industrial

Description

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.

Simplified Block Diagram

MAX15157B: Typical Application Circuit MAX15157B: 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