MAX4272
PRODUCTION3V 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
- Part Models
- 2
- 1ku List Price
- Starting From $4.69
Overview
- 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
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
Documentation
Data Sheet 1
Technical Articles 4
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 |
|---|---|---|---|
| MAX4272ESA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX4272ESA+T | Small-Outline IC Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX4272ESA+ | PRODUCTION | |
| MAX4272ESA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX4272ESA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| MAX4370 | PRODUCTION | Current-Regulating Hot-Swap Controller with DualSpeed/BiLevel Fault Protection |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- MAX4272
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.
Evaluation Kits
Evaluation Kit for the MAX4273
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