MAX4271

PRODUCTION

MAX4271

3V to 12V, Current-Limiting, Hot Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection

3V to 12V Hot Swap Controller with Latched Protection or Auto-Retry in 8-SO

PRODUCTION

MAX4271, MAX4272, MAX4273: Typical Operating Circuit slide

MAX4271, MAX4272, MAX4273: Typical Operating Circuit

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Features

Provide Safe Hot Swap for +3V to +12V Power Supplies with Few External Components
Unique Current Regulation Architecture Minimizes n-FET Linear Mode Duration
Autoretry Feature (MAX4272/MAX4273)
DualSpeed/BiLevel Current Limit Protects Against Current Glitches and Short Circuits
Power-On RESET (MAX4273)
15V Absolute Maximum Rating Protects Against Inductive Kickbacks During Board Removal
Internal Charge Pump Generates Gate Drive for External n-MOSFET
Status Output Pin Indicates Fault/Safe Condition
Space-Saving 8-Pin SO, 16-Pin QSOP Packages

Additional Details

The MAX4271/MAX4272/MAX4273 comprise a complete family of integrated 3V to 12V hot-swap controllers. They allow the safe insertion and removal of circuit cards into live backplanes.

The discharged filter capacitors of the circuit card provide a low impedance to the live backplane. High in-rush currents from the backplane to the circuit card can burn up connectors and components, or momentarily collapse the backplane power supply leading to a system reset. This family of hot-swap controllers prevents such problems by regulating the current to a preset limit when the board is plugged in, allowing the system to stabilize safely. After the startup cycle is completed, two on-chip comparators provide DualSpeed/BiLevel™ protection against short circuits, load glitches, and overcurrent conditions. In the event of a fault condition, the load is disconnected. Fault recovery is handled by unlatching (MAX4271), autoretry (MAX4272), or programmed (MAX4273) methods.

The MAX4271 family includes many integrated features that reduce component count and design time. An on-board charge pump provides the gate drive for a low-cost, external n-FET. Integrated features like startup current regulation and current glitch protection eliminate external timing resistors and capacitors. Also featured are an open-drain status output to indicate a fault condition, and an adjustable overcurrent response time.

The MAX4271 (latched fault protection) and MAX4272 (autoretry fault protection) come in 8-pin SO packages. The MAX4273 (full function) comes in the space-saving 16-pin QSOP package and 16-pin SO package. All parts are specified across the extended temperature range, and have an absolute maximum rating of 15V to provide extra protection against inductive kickback during board removal.

Applications

PBXs
RAID
Routers/Switches
Routers/Switches
Telecom
Wireless Base Stations

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Visit the ADI Support Page

Ask the ADI community for help.

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FAQs

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Part Models 2

1ku List Price Starting From $3.45

Technical Documents 5

MAX4271-MAX4273: 3V to 12V, Current-Limiting, Hot Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection Data Sheet (Rev.2) 12/20/2007

MAX4271 Reliability Data 01/12/2023

Flexible Hot-Swap Current Limiter Allows Thermal Protection 03/01/2001

Low-Voltage Fault Protection 11/17/2003

Understanding, Using, and Selecting Hot-Swap Controllers 12/29/2003

Design Resources 2

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
MAX4271ESA+	Small-Outline IC, Narrow (0.15in)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX4271ESA+T	Small-Outline IC, Narrow (0.15in)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

MAX4271ESA+
Pin/Package Drawing
Small-Outline IC, Narrow (0.15in)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

MAX4271ESA+T
Pin/Package Drawing
Small-Outline IC, Narrow (0.15in)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Oct 30, 2020

- 1702R2

ASSEMBLY

MAX4271ESA+

PRODUCTION

MAX4271ESA+T

PRODUCTION

pdf

pcn_1702r2

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 30, 2020

- 1702R2

ASSEMBLY

MAX4271ESA+

PRODUCTION

MAX4271ESA+T

PRODUCTION

pdf

pcn_1702r2

Companion Parts 1

Parts	Product Life Cycle	Description
Low Voltage Hot Swap Controllers1
MAX4370	PRODUCTION	Current-Regulating Hot-Swap Controller with DualSpeed/BiLevel Fault Protection

MAX4273EVKIT

Evaluation Kit for the MAX4273

MAX4273EVKIT

Evaluation Kit for the MAX4273

Features and Benefits

+2.7V to +13.2V Input Range
Output Configured for +5V (Configurable from +2.7V to +13.2V)
Up to 10A Capability (as Configured)
Demonstrates Unique Current-Regulation Architecture
Auxiliary V_CC Feature
Power-On Reset Circuit
Configurable Autoretry
Adjustable N-Channel MOSFET Gate Charging Time
Configurable Glitch Filters
Also Emulates MAX4271 and MAX4272 Hot-Swap Controllers
Surface-Mount Components
Fully Assembled and Tested

Buy Now View Details

Product Detail

The MAX4273 evaluation kit (EV kit) is a fully assembled and tested surface-mount hot-swap controller circuit board that provides current-limiting and DualSpeed/Bi-Level™ fault protection. The circuit uses a MAX4273 IC in a 16-pin QSOP package and is configured for a +2.7V to +13.2V input voltage range.

The MAX4273 controls the N-channel MOSFET and provides current regulation during startup. Several configurations allow the MAX4273 IC’s unique current regulation architecture to be tailored to the application. The current-limiting and short-circuit protection features are configurable and demonstrate the various features provided by the MAX4273 IC.

The EV kit features a power-on reset (POR) circuit. Several configurations for autoretry, glitch filters, auxiliary V_CC power, and gate drive speed are provided. The EV kit can also be reconfigured to emulate the MAX4271 and MAX4272 hot-swap controllers.

MAX4273EVKIT

Evaluation Kit for the MAX4273

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.