MAX17555

RECOMMENDED FOR NEW DESIGNS

Integrated 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converters

60V, Low IQ Synchronous Buck Regulator Enables High Efficiency

Part Models
6
1ku List Price
Starting From $0.86
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Part Details

  • Reduces External Components and Total Cost
    • No Schottky–Synchronous Operation
    • Internal Control Loop Compensation
    • Internal Fixed Soft-Start
    • Fixed Turn ON/OFF Input Voltage (MAX17554)
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4V to 60V Input Voltage (MAX17555)
    • Wide 10V to 60V Input Voltage (MAX17554)
    • Fixed 3.3V (MAX17554A, MAX17555A) and 5V (MAX17554B, MAX17555B) Output Voltage Options
    • Adjustable Output Range from 0.8V up to 90% of VIN (MAX17554C, MAX17555C)
    • Deliver up to 50mA of Load Current
  • Reduced Power Dissipation
    • Higher Light-Load Efficiency with Discontinuous Conduction Mode (DCM) Operation
    • Power Loss Reduction with External Boot-Strap Input (FB/VO) for Internal Circuitry (Fixed Output Part Options)
    • Fixed 70kHz Switching Frequency
    • 3.8µA Shutdown Current (MAX17555)
  • Flexible Design
    • Programmable EN/UV and HYST Threshold (MAX17555)
    • Open-Drain Output (Active-Low RESET) for Output Status Monitoring (MAX17555)
  • Robust Operation
    • Built-in Hiccup Mode Overload Protection
    • Overtemperature Protection
    • CISPR32 Class B Compliant
    • Wide -40°C to +125°C Ambient Operating Temperature, -40°C to +150°C Junction Temperature
MAX17555
Integrated 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converters
MAX17555A Typical Application Circuit
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Documentation

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Tools & Simulations

LTspice 1


Models for the following parts are available in LTspice:

  • MAX17555A
  • MAX17555B
  • MAX17555C

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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LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Evaluation Kits

eval board
MAX17555CEVKIT

Evaluation Kit for MAX17555

Features and Benefits

  • 14V to 60V Input-Voltage Range for the Step-Down Converter
  • 12V Output Voltage, Up to 30mA Continuous Load Current
  • 89.1% Peak Efficiency
  • Minimal Number of External Components
  • 70kHz Switching Frequency
  • Resistor Programmable Input Enable-Undervoltage (EN/UV) and Hysteresis (HYST)
  • Internal Loop Compensation
  • 0.8ms (typ) Internal Soft-Start Time
  • Open-Drain RESET Output to Monitor Output Voltage
  • Hiccup-mode Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17555C evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17555C, a 4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC converter in an 8-pin TDFN (2mm x 2mm) package. The EV kit is designed to operate over a 14V to 60V input and provides a 12V, 30mA output. The EV kit is set up to turn ON at 20V (max) and turn OFF at 14V (max) using EN/UV and HYST pins. The step-down converter works at a 70kHz frequency and delivers a peak efficiency of 89.1% with supplied components.

The EV kit is simple to use and easily configurable with minimal external components. The MAX17555C features a programmable input EN/UV, HYST threshold, and an open-drain RESET signal. The device offers built-in hiccup mode protection for overload and short circuit conditions, as well as thermal shutdown. The EV kit is complaint with the CISPR32 class B standard.

eval board
MAX17555BEVKIT

Evaluation Kit for MAX17555

Features and Benefits

  • 10V to 60V Input-Voltage Range for the Step-Down Converter
  • 5V Output Voltage, Up to 50mA Continuous Load Current
  • 87.3% Peak Efficiency
  • Minimal Number of External Components
  • 70kHz Switching Frequency
  • Resistor Programmable Input Enable-Undervoltage (EN/UV) and Hysteresis (HYST)
  • Internal Loop Compensation
  • 0.8ms (typ) Internal Soft-Start Time
  • Open-Drain RESET Output to Monitor Output Voltage
  • Boot-Strap from Output Voltage to Improve Efficiency
  • Hiccup-Mode Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17555B evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17555B, a 4V to 60V, 50mA, ultra-small, high efficiency, Synchronous Step-Down DC-DC Converter in an 8-pin TDFN (2mm x 2mm) package. The EV kit is designed to operate over a 10V to 60V input and provides a 5V, 50mA output. The EV kit is set up to turn ON at 13V (max) and turn OFF at 10V (max) using the EN/UV and HYST pins. The step-down converter is switch at a fixed 70kHz frequency and delivers a peak efficiency of 87.3% with supplied components.

The EV kit is simple to use and easily configurable with minimal external components. The MAX17555B features programmable input EN/UV and HYST threshold, and an open-drain RESET signal. The device offers built-in hiccup mode protection for overload and short circuit conditions, and thermal shutdown. The EV kit is complaint with the CISPR32 class B standard.

eval board
MAX17555AEVKIT

Evaluation Kit for MAX17555

Features and Benefits

  • 7.5V to 60V Input-Voltage Range for the Step-Down Converter
  • 3.3V Output Voltage, Up To 50mA Continuous Load Current
  • 87% Peak Efficiency
  • Minimal Number of External Components
  • 70kHz Switching Frequency
  • Resistor Programmable Input Enable-Undervoltage (EN/UV) and Hysteresis (HYST)
  • nternal Loop Compensation
  • 0.8ms (typ) Internal Soft-Start Time
  • Open-Drain RESET Output to Monitor Output Voltage
  • Bootstrap from Output Voltage to Improve Efficiency
  • Hiccup-Mode Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17555A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17555A, a 4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converter in an 8-pin TDFN (2mm x 2mm) package. The EV kit is designed to operate over a 7.5V to 60V input and provides a 3.3V, 50mA output. The EV kit is set up to turn ON at 10.1V (max) and turn OFF at 7.5V (max) using the EN/UV and HYST pins. The MAX17555A works at a fixed 70kHz frequency and delivers a peak efficiency of 87% with supplied components.

The EV kit is simple to use and easily configurable with minimal external components. The MAX17555A features a programmable input EN/UV and HYST threshold and an open-drain RESET signal. The device offers built-in hiccup mode protection for overload and short circuit conditions, as well as thermal shutdown. The EV kit is complaint with CISPR32 class B standard.

MAX17555CEVKIT
Evaluation Kit for MAX17555
MAX17555C EVKIT Board Photo Angle MAX17555C EVKIT Board Photo Top MAX17555C EVKIT Board Photo Bottom
MAX17555BEVKIT
Evaluation Kit for MAX17555
MAX17555B EVKIT Board Photo Angle MAX17555B EVKIT Board Photo Top MAX17555B EVKIT  Board Photo Bottom
MAX17555AEVKIT
Evaluation Kit for MAX17555
MAX17555A EVKIT Board Photo Angle MAX17555A EVKIT Board Photo Top MAX17555A EVKIT Board Photo Bottom

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