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MAX5961

0 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor

Industry's First Quad, Hot-Swap Controller Operates Down to 0V and Integrates a Voltage

and Current Monitor

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Status

Active: In Production.

Description

The MAX5961 0 to 16V, quad, hot-swap controller provides complete protection for systems with

up to four distinct supply voltages. The device allows the safe insertion and removal of circuit

cards into live backplanes. The MAX5961 is an advanced hot-swap controller that monitors

voltage and current with an internal 10-bit ADC. The device provides two levels of overcurrent circuit-breaker protection; a fast-

trip threshold for a fast turn-off, and a lower slow-trip threshold for a delayed turn-off. The maximum overcurrent circuit-

breaker threshold range is set independently for each channel with a trilevel input (ILIM_) or by programming though an I²C

interface.

The internal 10-bit ADC is multiplexed to monitor the output voltage and current of each hot-swap channel. The total time to

cycle through all the eight measurements is 100µs (typ). Each 10-bit value is stored in an internal circular buffer so that 50 past

samples of each signal can be read back through the I²C interface at any time or after a fault condition.

The MAX5961 can be configured as four independent hot-swap controllers, hot-swap controllers operating in pairs, or as a group

of four hot-swap controllers.

The device also includes five digital comparators per hot-swap channel to implement overcurrent warning, two levels of

overvoltage detection, and two levels of undervoltage detection. The limits for overcurrent, overvoltage, and undervoltage are

user-programmable. When any of the measured values violates the programmable limits, an external active-low ALERT signal is

asserted. In addition to the active-low ALERT signal, depending on the selected operating mode, the MAX5961 can deassert a

power-good signal and/or turn-off the external MOSFET.

The MAX5961 is available in a 48-pin thin QFN package and operates over the -40°C to +85°C extended temperature range.

Request Full Data Sheet

Key Features

Applications/Uses

Four Independent Hot-Swap Controllers Protect from 0 to 16V (Provided

IN ≥ 2.7V)

10-Bit ADC Monitors Voltage and Current of Each Channel

Circular Buffer Stores 5ms of Current and Voltage Measurements

Four Independent Internal Charge Pumps Generate n-Channel MOSFET

Gate Drives

Internal 500mA Gate Pulldown Current for Fast Shutdown

VariableSpeed/BiLevel™ Circuit-Breaker Protection

Alert Output Indicates Undervoltage Warning, Undervoltage Critical,

Overvoltage Warning, Overvoltage Critical, and Overcurrent Warning for

Each Channel

Independent Power-Good Outputs

Autoretry or Latched Fault Management

400kHz I²C Interface

7mm x 7mm 48-Pin TQFN Package

ASICs

Disk Drives

PCI Express® Hot Plug

Servers

Storage Systems

Key Specifications: Hot Swap Controllers

Part

Number

V

IN

(V)

V

IN

(V)

Low

Volt.

High

Volt.

Voltage

Polarity

Type

Fault Condition Control

Channels Package/Pins

Price

See

Page 1 of 2

QuickView - MAX5961 0 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor

11/9/2009

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5853