MAX17503

PRODUCTION

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

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

Data Sheet (Rev. 4) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.65

Viewing:

Overview

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%V_IN 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

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%V_IN 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 $1.65

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX17503ATP+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX17503ATP+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX17503SATP+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX17503SATP+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 19, 2021 - 2166 ASSEMBLY
		pcn_2166
MAX17503ATP+	PRODUCTION
MAX17503ATP+T	PRODUCTION
Mar 11, 2019 - 1716 WAFER FAB
		pcn_1716
MAX17503ATP+	PRODUCTION
MAX17503ATP+T	PRODUCTION
MAX17503SATP+	PRODUCTION
MAX17503SATP+T	PRODUCTION
Mar 12, 2018 - 1745 ASSEMBLY
		pcn_1745
MAX17503ATP+	PRODUCTION
MAX17503ATP+T	PRODUCTION
MAX17503SATP+	PRODUCTION
Apr 20, 2015 - 1483B_AMENDED WAFER FAB
		pcn_1483b_amended
MAX17503ATP+	PRODUCTION
MAX17503ATP+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 3
MAX17501	PRODUCTION	60V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter
MAX17502	PRODUCTION	60V, 1A, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter
MAX15062	PRODUCTION	60V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

Tools & Simulations

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.

Start EE-Sim Now

SIMPLIS Models 1

MAX17503 SIMPLIS Schematic

Evaluation Kits

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

Buy Now View Details

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 Details

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

Resources

MAX17503EVKITBE ODB File - Design Files
11/22/2023

Evaluation Kit for the MAX17503

Buy Now View Details

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 Details

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

Resources

MAX17503EVKITB.ZIP Gerber File
1/1/0001

MAX17503EVKITB ODB++ File
1/1/0001

MAX17503EVKITB PCB and Gerber Files - Design Files
11/22/2023

MAX17503EVKITB ODB File - Design Files
11/22/2023

Evaluation Kit for the MAX17503

Buy Now View Details

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 Details

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