MAX8533 Smallest, Most Reliable, 12V, InfiniBand-Compliant Hot-Swap Controller

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The MAX8533 is a single-port, 12V, InfiniBand®-compliant (IB) versatile hot-swap controller. The device can be implemented in both IB Class I (nonisolated) and Class II (isolated) power-topology applications. Additionally, the MAX8533 can be used as a reliable power controller on hot-swappable blade servers, RAID cards, and network switches or routers that are powered from a 12V bus.

The MAX8533 integrates several features that allow reliable insertion and removal of the circuit card, as well as real-time monitoring of abnormal occurrences. The MAX8533 allows for an adjustable soft-start ramp during turn-on of the input voltage, while providing overcurrent protection. It also provides accurate and consistent current-regulated outputs for a programmable period of time to latch off and soft-start in the presence of overcurrent conditions (OC). Additionally, it provides a second level of severe overcurrent (SOC) protection by responding to a dead short in 100ns. The MAX8533 also includes adjustable overvoltage protection.

The MAX8533 incorporates undervoltage lockout (UVLO) and a power-good (POK) signal to the DC-to-DC converters to confirm the status of output voltage rails during operation. Two enable inputs EN (logic enable) and LPEN (local power enable) provide flexible sequencing. The MAX8533 is specified across the extended temperature range and has an absolute maximum rating of 16V to withstand inductive kickback during board removal.

The MAX8533 is available in the space-saving 10-pin µMAX package.

Key Features

Applications/Uses

12V Hot-Swap Controller for 25W or 50W InfiniBand Ports
Programmable Overcurrent Protection Regulation Level
EN and LPEN Inputs for Flexible Sequencing
Power-Good Signal
16V Absolute Maximum Rating Withstands Inductive Kickbacks
Soft-Start Overcurrent Protection During Turn-On
Timed Current Regulation Period (Adjustable)
100ns IC Response Time to Output Dead Short
Adjustable Overvoltage Protection
Undervoltage Lockout
Adjustable Turn-On Ramp

	12V Hot-Swap
	Blade Servers
	Hot-Swap/Plug/Dock Power Management
	InfiniBand® Bulk Power
	Network Routers and Switches
	RAID

Key Specifications: Hot Swap Controllers

Part Number

Min. V_IN (V)

Max. V_IN (V)

Low Voltage

High Voltage

Voltage Polarity

Type

Fault Condition Control

Number of Channels

Features

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX8533

Yes

Positive

Positive, Low-Voltage

Latched Off

•	Fault Status Output

•	In-Rush Current and Short Circuit Protection

•	On/Off Control

•	Output Undervoltage/Overvoltage Protection

•	Power-Good output (active-high)

•	Regulated, DualSpeed/BiLevel; inrush current and short circuit protection

Yes

uMAX/10

-40 to +85

$1.90 @ 1k

See All Hot Swap Controllers (44)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.