MAX17640

PRODUCTION

MAX17640

60V, 400mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

Industry’s Smallest High-Voltage Synchronous Buck Regulator

PRODUCTION

PRODUCTION

MAX17640 Block Diagram slide

MAX17640 Circuit Diagram slide

MAX17640 Pin Configuration slide

MAX17640 Block Diagram

MAX17640 Circuit Diagram

MAX17640 Pin Configuration

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Part Models 6

1ku List Price Starting From $1.01

Features

Eliminates External Components and Reduces Total Cost
- No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
- Internal Compensation
- Internal Feedback Divider for Fixed 3.3V, 5V Output Voltages
- Internal Soft-Start
- All Ceramic Capacitors, Ultra-Compact Layout
Flexibility to Support Multiple Rails in a System

Wide 4.5V to 60V Input Voltage Range
Fixed 3.3V and 5V Output Voltage Options
Adjustable 0.9V to 0.89 x V_IN Output Voltage Option
Delivers up to 400mA Load Current
Configurable Between PFM and Forced-PWM Modes

Reduces Power Dissipation
- 92% Peak Efficiency
- PFM Feature for High Light-Load Efficiency
- 2.2µA (typ) Shutdown Current
Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Current Limit and Auto-retry Startup
- Built-In Output Voltage Monitoring with Open-Drain Active-Low RESET Pin
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Output
- Overtemperature Protection
- Wide -40°C to +125°C Ambient Operating Temperature Range and -40°C to +150°C Junction Temperature Range
- Complies with CISPR32 (EN55032) Class B Conducted and Radiated Emissions

Additional Details

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17640 family of products are high-efficiency, high-voltage, Himalaya synchronous DC-DC converters with integrated MOSFETs operating over a wide input-voltage range of 4.5V to 60V.

The converters can deliver up to 400mA and generate output voltages from 0.9V to 0.89 x VIN; MAX17640A fixed at 3.3V, MAX17640B fixed at 5.0V, and MAX17640C is adjustable. The family of converters is available in a compact, 8-pin, TDFN (2mm x 2mm) package.

The device employs a peak-current-mode control architecture with a MODE pin that can be used to operate the device in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high-efficiency. The low-resistance on-chip MOSFETs ensure high-efficiency at full load and simplify the PCB layout.

To reduce input inrush current, the device offers an internal soft-start. The device also incorporates an EN/UVLO pin that allows the user to turn on the part at the desired input voltage level.

Applications

Industrial Sensors
4–20mA Current Loops
HVAC and Building Control
High-Voltage LDO Replacement
General Purpose Point-of-Load

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Search

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

EngineerZone Icon

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $1.01

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Technical Documents 1

MAX17640: 60V, 400mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters Data Sheet (Rev.2) 12/22/2023

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Reference Materials 1

Video

1

Thumbnail Image

Video

2022-10-04

03:10

Introduction to the MAX17640 60V, 400mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

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Design Resources 6

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
MAX17640AATA+	8-LFCSP-2X2X0.75	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX17640AATA+T	8-LFCSP-2X2X0.75	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX17640BATA+	8-LFCSP-2X2X0.75	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX17640BATA+T	8-LFCSP-2X2X0.75	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX17640CATA+	8-LFCSP-2X2X0.75	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX17640CATA+T	8-LFCSP-2X2X0.75	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

MAX17640AATA+
Pin/Package Drawing
8-LFCSP-2X2X0.75
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX17640AATA+T
Pin/Package Drawing
8-LFCSP-2X2X0.75
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX17640BATA+
Pin/Package Drawing
8-LFCSP-2X2X0.75
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX17640BATA+T
Pin/Package Drawing
8-LFCSP-2X2X0.75
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX17640CATA+
Pin/Package Drawing
8-LFCSP-2X2X0.75
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX17640CATA+T
Pin/Package Drawing
8-LFCSP-2X2X0.75
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Jun 13, 2022

- 2183A

WAFER FAB

MAX17640AATA+

PRODUCTION

MAX17640AATA+T

PRODUCTION

MAX17640BATA+

PRODUCTION

MAX17640BATA+T

PRODUCTION

MAX17640CATA+

PRODUCTION

MAX17640CATA+T

PRODUCTION

pdf

pcn_2183a

Feb 11, 2022

- 2183

ASSEMBLY,WAFER FAB

MAX17640AATA+

PRODUCTION

MAX17640AATA+T

PRODUCTION

MAX17640BATA+

PRODUCTION

MAX17640BATA+T

PRODUCTION

MAX17640CATA+

PRODUCTION

MAX17640CATA+T

PRODUCTION

pdf

pcn_2183

Filter by Model

Part Models

Product Lifecycle

PCN

Jun 13, 2022

- 2183A

WAFER FAB

MAX17640AATA+

PRODUCTION

MAX17640AATA+T

PRODUCTION

MAX17640BATA+

PRODUCTION

MAX17640BATA+T

PRODUCTION

MAX17640CATA+

PRODUCTION

MAX17640CATA+T

PRODUCTION

pdf

pcn_2183a

Feb 11, 2022

- 2183

ASSEMBLY,WAFER FAB

MAX17640AATA+

PRODUCTION

MAX17640AATA+T

PRODUCTION

MAX17640BATA+

PRODUCTION

MAX17640BATA+T

PRODUCTION

MAX17640CATA+

PRODUCTION

MAX17640CATA+T

PRODUCTION

pdf

pcn_2183

Companion Parts 2

Parts	Product Life Cycle	Description
Internal Power Switch Buck Regulators2
MAX15062	PRODUCTION	60V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters
MAX17502	PRODUCTION	60V, 1A, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

MAX17640AEVKIT

Evaluation Kit for the MAX17640 Converters in Application

MAX17640AEVKIT

Evaluation Kit for the MAX17640 Converters in Application

Features and Benefits

Operates up to 60V Input Supply
Fixed 5V, Fixed 3.3V, and Adjustable 12V Application Circuits
Up to 400mA Load Current
500kHz Fixed Switching Frequency
Enable/UVLO Input, Resistor-Programmable UVLO Threshold
Selectable PWM and PFM Modes of Operation
Open-Drain Active-Low RESET Output
Overcurrent and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested
Complies with CISPR32(EN55032) Class B Conducted and Radiated Emissions

Buy Now View Details

Product Detail

The MAX17640A/MAX17640B/MAX17640C evaluation kits (EV kits) provide proven designs to evaluate the performance of the MAX17640A/MAX17640B/MAX17640C high-voltage, high-efficiency, synchronous step-down DC-DC converters. The MAX17640A converter operates over a 5V to 48V input range and can deliver up to 400mA at a fixed 3.3V output. The MAX17640B converter operates over a 7V to 60V input range and can deliver up to 400mA at a fixed 5V output. The MAX17640C converter operates over a 15V to 60V input range and can deliver up to 400mA at an adjustable 12V output.

The EV kits feature an adjustable input undervoltage-lockout, open-drain active-low RESET, overcurrent protection, selectable mode of operation, and thermal shutdown. Refer to the MAX17640 converter data sheet for a complete description of the part that should be read in conjunction with this data sheet before operating these EV kits.

Applications

4–20mA Current Loops
General Purpose Point-of-Load
High-Voltage LDO Replacement
HVAC and Building Control
Industrial Sensors

Resources

ZIP

MAX17640AEVKIT ODB File - Design Files

2.96M

Show More

MAX17640BEVKIT

Evaluation Kit for the MAX17640 Converters in Application

MAX17640BEVKIT

Evaluation Kit for the MAX17640 Converters in Application

Features and Benefits

Operates up to 60V Input Supply
Fixed 5V, Fixed 3.3V, and Adjustable 12V Application Circuits
Up to 400mA Load Current
500kHz Fixed Switching Frequency
Enable/UVLO Input, Resistor-Programmable UVLO Threshold
Selectable PWM and PFM Modes of Operation
Open-Drain Active-Low RESET Output
Overcurrent and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested
Complies with CISPR32(EN55032) Class B Conducted and Radiated Emissions

Buy Now View Details

Product Detail

The MAX17640A/MAX17640B/MAX17640C evaluation kits (EV kits) provide proven designs to evaluate the performance of the MAX17640A/MAX17640B/MAX17640C high-voltage, high-efficiency, synchronous step-down DC-DC converters. The MAX17640A converter operates over a 5V to 48V input range and can deliver up to 400mA at a fixed 3.3V output. The MAX17640B converter operates over a 7V to 60V input range and can deliver up to 400mA at a fixed 5V output. The MAX17640C converter operates over a 15V to 60V input range and can deliver up to 400mA at an adjustable 12V output.

The EV kits feature an adjustable input undervoltage-lockout, open-drain active-low RESET, overcurrent protection, selectable mode of operation, and thermal shutdown. Refer to the MAX17640 converter data sheet for a complete description of the part that should be read in conjunction with this data sheet before operating these EV kits.

Applications

4–20mA Current Loops
General Purpose Point-of-Load
High-Voltage LDO Replacement
HVAC and Building Control
Industrial Sensors

Resources

ZIP

MAX17640BEVKIT ODB File - Design Files

2.96M

Show More

MAX17640C12EVKIT

Evaluation Kit for the MAX17640 Converters in Application

MAX17640C12EVKIT

Evaluation Kit for the MAX17640 Converters in Application

Features and Benefits

Operates up to 60V Input Supply
Fixed 5V, Fixed 3.3V, and Adjustable 12V Application Circuits
Up to 400mA Load Current
500kHz Fixed Switching Frequency
Enable/UVLO Input, Resistor-Programmable UVLO Threshold
Selectable PWM and PFM Modes of Operation
Open-Drain Active-Low RESET Output
Overcurrent and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested
Complies with CISPR32(EN55032) Class B Conducted and Radiated Emissions

Buy Now View Details

Product Detail

The MAX17640A/MAX17640B/MAX17640C evaluation kits (EV kits) provide proven designs to evaluate the performance of the MAX17640A/MAX17640B/MAX17640C high-voltage, high-efficiency, synchronous step-down DC-DC converters. The MAX17640A converter operates over a 5V to 48V input range and can deliver up to 400mA at a fixed 3.3V output. The MAX17640B converter operates over a 7V to 60V input range and can deliver up to 400mA at a fixed 5V output. The MAX17640C converter operates over a 15V to 60V input range and can deliver up to 400mA at an adjustable 12V output.

The EV kits feature an adjustable input undervoltage-lockout, open-drain active-low RESET, overcurrent protection, selectable mode of operation, and thermal shutdown. Refer to the MAX17640 converter data sheet for a complete description of the part that should be read in conjunction with this data sheet before operating these EV kits.

Applications

4–20mA Current Loops
General Purpose Point-of-Load
High-Voltage LDO Replacement
HVAC and Building Control
Industrial Sensors

Resources

ZIP

MAX17640C12EVKIT ODB File - Design Files

2.96M

Show More

MAX17640AEVKIT

Evaluation Kit for the MAX17640 Converters in Application

MAX17640BEVKIT

Evaluation Kit for the MAX17640 Converters in Application

MAX17640C12EVKIT

Evaluation Kit for the MAX17640 Converters in Application

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

MAX17640 - Step-Down (Buck) Regulators

EE-Sim 1

EE-Sim Power® Tools

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

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