Rainbow-electronics DS4560 User Manual download pdf

General Description

The DS4560 is a self-contained hot-plug switch intend-

ed to be used on +12V power buses to limit through

current and to control the power-up output-voltage

ramp. The device contains an on-board 25mΩ n-chan-

nel power MOSFET that is actively closed-loop con-

trolled to ensure that an adjustable current limit is not

exceeded. The maximum allowable current through the

device is determined by an external resistor connected

to the ILIM pin.

The DS4560 also contains the ability to control the

power-up output-voltage ramp. A capacitor connected

to the VRAMP pin sets the desired voltage ramp rate.

The output voltage is unconditionally clamped to keep

input overvoltage stresses from harming the load. The

DS4560 also contains an adjustable power-up timer. A

capacitor connected to the TIMER pin determines how

long after power-on reset the DS4560 should wait

before starting to apply power to the load. The TIMER

pin can also be driven with a digital logic output to cre-

ate a device-enable function.

The DS4560 contains an on-board temperature sensor

with hysteresis. If operating conditions cause the

device to exceed an internal thermal limit, the DS4560

either unconditionally shuts down and latches off await-

ing a power-on reset (DS4560S-LO), or it waits until the

device has cooled by the hysteresis amount and then

restarts (DS4560S-AR).

Applications

Features

♦ On-Board 25mΩ Power MOSFET

♦ Adjustable Short-Circuit Current and Overload

Current Limit

♦ Adjustable Output-Voltage Slew Rate

♦ Adjustable Power-Up Timer with External Enable

Capability

♦ Output Overvoltage Limiting

♦ On-Board Thermal Protection

♦ On-Board Charge Pump

♦ Latchoff and Autoretry Versions Available

♦ 9.0V to 13.2V Supply Operation

♦ 8-Pin SO (150 mils) Pb-Free Package

DS4560

12V Hot-Plug Switch

________________________________________________________________

Maxim Integrated Products

SO (150 mils)

TOP VIEW

2 7 LOADVRAMP

18V

GND

LOAD

TIMER 3 6

LOADILIM

DS4560

Pin Configuration

Ordering Information

Rev 1; 9/08

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.

Denotes a lead-free/RoHS-compliant package.

T = Tape and reel.

PART

THERMAL

SHUTDOWN

PIN-PACKAGE

DS4560S-LO+ Latchoff 8 SO

DS4560S-LO+T Latchoff 8 SO

DS4560S-AR+ Autoretry 8 SO

DS4560S-AR+T Autoretry 8 SO

Pin Description

PIN NAME FUNCTION

1 GND

Ground. This is also a heat sink for the

device.

2 VRAMP Output-Voltage Ramp Adjustment

3 TIMER Power-Up Timer/Enable

4 ILIM Current-Limit Adjustment

5, 6, 7 LOAD Output Load Connection (MOSFET Source)

8 V

Input Supply Voltage (MOSFET Drain)

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

InfiniBand is a trademark and service mark of the InfiniBand Trade Association.

RAID/Hard Drives

Servers/Routers

PCI/PCI Express

InfiniBand

Base Stations

1 2 3 4 5 6 7 8

12V Hot-Plug Switch 1

Summary of Contents

Page 1 - 12V Hot-Plug Switch

General DescriptionThe DS4560 is a self-contained hot-plug switch intend-ed to be used on +12V power buses to limit throughcurrent and to control the

Page 2

DS456012V Hot-Plug Switch2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSRECOMMENDED

Page 3

DS456012V Hot-Plug Switch_______________________________________________________________________________________ 3Note 1: All voltages are referenced

Page 4

DS456012V Hot-Plug Switch4 _______________________________________________________________________________________Typical Operating Characteristics (c

Page 5

DS4560THERMALLIMITEXTERNAL DISABLETIMERCTIMER+5V2.5VUVLOCURRENTLIMITCHARGEPUMPLOAD+5VVREGOVERVOLTAGELIMITGNDRRRILIMLOADILIM+12VVCCVRAMPVCC80μA80μACVRA

Page 6

DS456012V Hot-Plug Switch6 _______________________________________________________________________________________Enable/TimerThe voltage level of the

Page 7

DS456012V Hot-Plug Switch_______________________________________________________________________________________ 7Latchoff Version (DS4560S-LO)Once th

Page 8

DS456012V Hot-Plug SwitchMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No cir

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Rainbow-electronics DS4560 User Manual

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