MAX17633

PRODUCTION

4.5V to 36V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Wide Input Voltage, 3.5A Internal FET Synchronous Buck Converter Ideal for Industrial Applications

Data Sheet (Rev. 2) Product Selection Table

Part Models: 6
1ku List Price: Starting From $1.75

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Overview

Reduces External Components and Total Cost
- No Schottky - Synchronous Operation
- Internal Compensation Components
- All-Ceramic Capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 36V Input
- Adjustable Output Range from 0.9V up to 90% of V_IN
- Delivers up to 3.5A Over the Temperature Range
- 400kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
- Available in a 20-Pin, 4mm × 4mm TQFN Package
Reduces Power Dissipation
- Peak Efficiency > 93%
- PFM and DCM Modes Enable Enhanced Light-Load Efficiency
- Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency
- 2.8µA Shutdown Current
Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Overload Protection
- Adjustable and Monotonic Startup with Prebiased Output Voltage
- Built-in Output-Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Overtemperature Protection
- CISPR 22 Class B Compliant
- Wide -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range

Part Models: 6
1ku List Price: Starting From $1.75

Documentation

Data Sheet 1

MAX17633: 4.5V to 36V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter Data Sheet (Rev.2) 07/21/2020

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
MAX17633AATP+	Thin Quad Flatpack, No Leads	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX17633AATP+T	Thin Quad Flatpack, No Leads	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX17633BATP+	Thin Quad Flatpack, No Leads	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX17633BATP+T	Thin Quad Flatpack, No Leads	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX17633CATP+	Thin Quad Flatpack, No Leads	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX17633CATP+T	Thin Quad Flatpack, No Leads	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 20, 2026 - 2571D PIN/ERRATA
		pcn_2571d
MAX17633AATP+T	PRODUCTION
MAX17633BATP+T	PRODUCTION
MAX17633CATP+T	PRODUCTION

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

Software Resources

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Tools & Simulations

ADI Power Studio™ Designer

ADI Power Studio™ Designer is the next-generation tool for IC-level, power supply design, guiding engineers to faster, validated solutions.

Open Tool

SIMPLIS Models 1

MAX17633 SIMPLIS Schematic

Evaluation Kits

Evaluation Kit for the MAX17633 5V Output-Voltage Application

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Features and Benefits

Wide 6.5V to 36V Input Range
Programmed 5V Output, 3.5A Load Current
500kHz Switching Frequency
EN/UVLO Input, Resistor-Programmable UVLO Threshold
Programmed 1ms Soft-Start Time
Selectable PWM, PFM, and DCM Modes
Open-Drain Active-Low RESET Output Pulled Up To 5V of INTVCC
Provision for External Frequency Synchronization
Overcurrent and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX17633BEVKIT# 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17633B high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents of 3.5A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features an adjustable input undervoltage lockout, adjustable soft-start, open-drain Active-Low RESET signal, and external frequency synchronization. EV kit specifications, settings, features and benefits are highlighted. For full MAX17633B IC features, benefits and parameters, refer to MAX17633 datasheet.

Applications

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

Resources

MAX17633BEVKIT ODB Files - Design Files
10/6/2023

Evaluation Kit for the MAX17633 3.3V Output-Voltage Application

Buy Now View Details

Features and Benefits

Wide 4.5V to 36V Input Range
Programmed 3.3V Output, 3.5A Load Current
500kHz Switching Frequency
EN/UVLO Input, Resistor-Programmable UVLO Threshold
Programmed 1ms Soft-Start Time
Selectable PWM, PFM, and DCM Modes
Open-Drain Active-Low RESET Output Pulled Up To 5V of INTVCC
Provision for External Frequency Synchronization
Overcurrent and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX17633AEVKIT# 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17633A high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 3.3V output at load currents of 3.5A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features an adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external frequency synchronization. EV kit specifications, settings, features and benefits are highlighted. For full MAX17633A IC features, benefits and parameters, refer to MAX17633 datasheet.

Applications

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

Resources

MAX17633AEVKIT ODB Files - Design Files
10/6/2023

Evaluation Kit for the MAX17633 5V Output-Voltage Application

Buy Now View Details

Features and Benefits

Wide 6.5V to 36V Input Range
Programmed 5V Output, 3.5A Load Current
500kHz Switching Frequency
EN/UVLO Input, Resistor-Programmable UVLO Threshold
Programmed 1ms Soft-Start Time
Selectable PWM, PFM, and DCM Modes
Open-Drain Active-Low RESET Output Pulled Up To 5V of INTVCC
Provision for External Frequency 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 MAX17633CEVKIT# 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17633C high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents of 3.5A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features an adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. EV kit specifications, settings, features and benefits are highlighted. 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 MAX17633 data sheet.

Applications

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

Resources

MAX17633CEVKIT ODB Files - Design Files
10/6/2023

Latest Discussions

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MAX17633

Overview

Documentation

Data Sheet 1

Video 1

Software Resources

Can't find the software or driver you need?

Tools & Simulations

ADI Power Studio™ Designer

SIMPLIS Models 1

Evaluation Kits

Features and Benefits

Product Details

Resources

Features and Benefits

Product Details

Resources

Features and Benefits

Product Details

Resources

Latest Discussions

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