MAX17503
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MAX17503

4.5V-60V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

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Industry's Only 60V, 2.5A Internal FET Synchronous Buck Converter

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Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $2.61
Features
  • Eliminates External Components and Reduces Total Cost
    • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation for Stable Operation at Any Output Voltage
    • All-Ceramic Capacitor Solution: Ultra-Compact Layout with as Few as Eight External Components
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input Voltage Range
    • 0.9V to 90%VIN Output Voltage
    • Delivers Up to 2.5A Over Temperature
    • 100kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
    • MAX17503S Allows Higher Frequency of Operation
    • Available in a 20-Pin, 4mm x 4mm TQFN-EP Package
  • Reduces Power Dissipation
    • Peak Efficiency of 94%
    • PFM and DCM Modes for High Light-Load Efficiency
    • Shutdown Current = 2.8µA (typ)
  • Operates Reliably
    • Hiccup-Mode Current Limit and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Open-Drain Active-Low RESET Pin)
    • Resistor-Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • Wide -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
Additional Details
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The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17503/MAX17503S high-efficiency, high-voltage, synchronously rectified step-down converter with dual integrated MOSFETs operates over a 4.5V to 60V input. It delivers up to 2.5A and 0.9V to 90%VIN output voltage. Built-in compensation across the output voltage range eliminates the need for external components. The feedback (FB) regulation accuracy over -40°C to +125°C is ±1.1%. The device is available in a compact (4mm x 4mm) TQFN-EP lead(Pb)-free package with an exposed pad. Simulation models are available.

The device features a peak-current-mode control architecture with a MODE feature that can be used to operate the device in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) control schemes. PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. DCM features constant frequency operation down to lighter loads than PFM mode, by not skipping pulses, but only disabling negative inductor current at light loads. DCM operation offers efficiency performance that lies between PWM and PFM modes.The MAX17503S offers a lower minimum on-time that allows for higher switching frequencies and a smaller solution size.

A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/input undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input-voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.

Applications

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • High-Voltage Single-Board Systems
  • Industrial Power Supplies
  • Wall Transformer Regulation
Part Models 4
1ku List Price Starting From $2.61

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Jul 19, 2021

- 2166

ASSEMBLY

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

Mar 11, 2019

- 1716

WAFER FAB

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

MAX17503SATP+

PRODUCTION

MAX17503SATP+T

PRODUCTION

Mar 12, 2018

- 1745

ASSEMBLY

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

MAX17503SATP+

PRODUCTION

Apr 20, 2015

- 1483B_AMENDED

WAFER FAB

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jul 19, 2021

- 2166

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ASSEMBLY

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

Mar 11, 2019

- 1716

arrow down

WAFER FAB

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

MAX17503SATP+

PRODUCTION

MAX17503SATP+T

PRODUCTION

Mar 12, 2018

- 1745

arrow down

ASSEMBLY

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

MAX17503SATP+

PRODUCTION

Apr 20, 2015

- 1483B_AMENDED

arrow down

WAFER FAB

MAX17503ATP+

PRODUCTION

MAX17503ATP+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

MAX17503EVKITBE

Evaluation Kit for the MAX17503 in 5V Output-Voltage Application

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MAX17503EVKITBE

Evaluation Kit for the MAX17503 in 5V Output-Voltage Application

Evaluation Kit for the MAX17503 in 5V Output-Voltage Application

Features and Benefits

  • Operates from a 6.5V to 60V Input Supply
  • Programmed 5V Output Voltage, 2.5A Load Current
  • 500kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select Among PWM, PFM, or DCM Modes
  • Open-Drain Active-Low RESET Output
  • External Clock Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions

Product Detail

The MAX17503EVKITBE# evaluation kit (EV kit) provides a proven design to evaluate the MAX17503 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 2.5A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. The EV kit also provides a good layout example which is optimized for conducted, radiated EMI, and thermal performance. For more details about the IC benefits and features, refer to the MAX17503 IC data sheet.

Applications

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • High-Voltage Single-Board Systems
  • Industrial Power Supplies
  • Wall Transformer Regulation

MAX17503EVKITB

Evaluation Kit for the MAX17503

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MAX17503EVKITB

Evaluation Kit for the MAX17503

Evaluation Kit for the MAX17503

Features and Benefits

  • Operates from a 6.5V to 60V Input Supply
  • 5V Output Voltage
  • Up to 2.5A Output Current
  • 500kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select Among PWM, PFM, or DCM Modes
  • Open-Drain Active-Low RESET Output
  • External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX17503 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17503 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 2.5A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external frequency synchronization.

Applications

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • High-Voltage Single-Board Systems
  • Industrial Power Supplies
  • Wall Transformer Regulation

MAX17503EVKITA

Evaluation Kit for the MAX17503

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MAX17503EVKITA

Evaluation Kit for the MAX17503

Evaluation Kit for the MAX17503

Features and Benefits

  • Operates from a 5V to 60V Input Supply
  • 3.3V Output Voltage
  • Up to 2.5A Output Current
  • 450kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • MODE Pin to Select Among PWM, PFM, or DCM Modes
  • Open-Drain RESET Output
  • External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX17503 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17503 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 3.3V output at load currents up to 2.5A and features a 450kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external frequency synchronization. 

Applications

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • High-Voltage Single-Board Systems
  • Industrial Power Supplies
  • Wall Transformer Regulation
Tools & Simulations

Tools & Simulations 2

Reference Designs

Reference Designs 2

maxrefdes98fig05

Non-isolated 5V/2.5A PoE Powered Device Power Supply

Connections of the MAXREFDES39# board with the PTMA210152M EV kit

MAXREFDES39#: Power Amplifier Biasing through MAX11300 PIXI IC

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