MAX34561T+T Maxim Integrated Products, MAX34561T+T Datasheet

MAX34561T+T

Manufacturer Part Number

MAX34561T+T

Description

Other Power Management 12V/5V Hot-Plug Switch

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX34561T.pdf (11 pages)

Specifications of MAX34561T+T

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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19-5621; Rev 0; 11/10

The MAX34561 is a dual, self-contained, hot-plug switch

intended to be used on +12V and +5V power rails to limit

through current and to control the power-up output-volt-

age ramp. The device contains two on-board n-channel

power MOSFETs that are actively closed-loop controlled

to ensure that an adjustable current limit is not exceed-

ed. The maximum allowable current through the device

is adjusted by external resistors connected between the

LOAD and ILIM pins.

The device can control the power-up output-voltage

ramp. Capacitors connected to the VRAMP pins set

the desired voltage-ramp rate. The output voltages

are unconditionally clamped to keep input overvoltage

stresses from harming the load. The device also contains

adjustable power-up timers. Capacitors connected to

the TIMER pins determine how long after power-on reset

(POR) the device should wait before starting to apply

power to the loads. The TIMER pins can be driven with

a digital logic output to create a device-enable function.

The device contains an on-board temperature sensor

with hysteresis. If operating conditions cause the device

to exceed an internal thermal limit, the device either

unconditionally shuts down and latches off awaiting a

POR, or waits until the device has cooled by the hyster-

esis amount and then restarts.

PCI Express is a registered trademark of PCI-SIG Corp.

InfiniBand is a trademark and service mark of InfiniBand Trade

Association.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

RAID/Hard Drives

Servers/Routers

PCI/PCI Express

InfiniBand

Base Stations

TM/SM

_______________________________________________________________ Maxim Integrated Products 1

General Description

Applications

12V/5V Hot-Plug Switch

+Denotes a lead(Pb)-free/RoHS compliant package.

T = Tape and reel.

*EP = Exposed pad.

MAX34561T+

MAX34561T+T

Completely Integrated Hot-Plug Functionality for

+12V and +5V Power Rails

Dual Version of the DS4560

On-Board Power MOSFETs (68mI and 43mI)

No High-Power R

Adjustable Current Limits

Adjustable Output-Voltage Slew Rates

Adjustable Power-Up Enable Timing

Output Overvoltage Limiting

On-Board Thermal Protection

On-Board Charge Pump

User-Selectable Latchoff or Automatic Retry

Operation

PART

SENSE

-40NC to +85NC

TEMP RANGE

Ordering Information

Resistors Needed

PIN-PACKAGE

24 TQFN-EP*

Features

Related parts for MAX34561T+T

MAX34561T+T Summary of contents

Page 1

... Adjustable Power-Up Enable Timing S Output Overvoltage Limiting S On-Board Thermal Protection S On-Board Charge Pump S User-Selectable Latchoff or Automatic Retry S Operation Ordering Information PART TEMP RANGE MAX34561T+ -40NC to +85NC MAX34561T+T -40NC to +85NC +Denotes a lead(Pb)-free/RoHS compliant package Tape and reel. *EP = Exposed pad. Features PIN-PACKAGE 24 TQFN-EP* 24 TQFN-EP* ...

Page 2

Hot-Plug Switch ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to GND ............-0.3V to +6.5V CC5 Voltage Range on V Relative to GND ...........-0.3V to +18V CC12 Voltage Range on ILIM5, VRAMP5, TIMER5, ARD5 Relative to GND .........-0.3V to ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5V +12V +25NC, unless otherwise noted.) CC5 CC12 J PARAMETER SYMBOL 5V MOSFET Output Capacitance 12V MOSFET Output Capacitance 5V and 12V Delay Time from Enable to Beginning of t Conduction ...

Page 4

Hot-Plug Switch (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. TEMPERATURE 1.8 1.6 1.4 12V OPERATION 1.2 1.0 0.8 0.6 5V OPERATION 0.4 0.2 0 -40 - 100 120 TEMPERATURE (°C) CURRENT ...

Page 5

A TYPICAL MAX34561 TURN-ON WAVEFORMS V = 5V, 20Ω RESISTIVE LOAD CC MAX34561 toc09 V CC5 TIMER5 LOAD5 VRAMP5 2ms/div TURN-ON WAVEFORMS V = 12V, 20Ω RESISTIVE LOAD CC MAX34561 toc12 V CC12 LOAD12 ...

Page 6

Hot-Plug Switch TOP VIEW PIN NAME 5V Supply Input. Power-supply input and n-channel power MOSFET drain connection. If the 5V side CC5 is not used, connect this pin to GND. 4–7 LOAD5 5V Load Output. ...

Page 7

PIN NAME 5V Autoretry Disable. Connect this pin to GND to disable automatic retry functionality; the device latches off during an overtemperature fault. Leave this pin open to enable automatic retry function. 22 ARD5 This pin contains a pullup (R ...

Page 8

Hot-Plug Switch 12V UVLO +5V V REG CHARGE PUMP 12V I THERMAL TIMER LIMIT +5V V REG R PU12 12V ARD12 AUTORETRY DISABLE 5V UVLO CHARGE PUMP 5V I THERMAL TIMER LIMIT V CC5 R PU5 5V ARD5 AUTORETRY ...

Page 9

Once the device has been enabled, there is a delay (t ) until conduction begins from V POND LOAD12 (LOAD5). This delay is the time required for the charge pump to bring the gate voltage of the cor- responding power ...

Page 10

Hot-Plug Switch drop across the corresponding power MOSFET and the load current. See the Thermal Shutdown with Autoretry Enabled typical operating curves for details. Applications Information The exposed pad is also a heatsink for the device. The exposed pad ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2010 Maxim Integrated Products © ...

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