DS4560 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 12V Hot-Plug Switch

19-4619; Rev 2; 5/09
12V Hot-Plug Switch
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).
RAID/Hard Drives
Servers/Routers
PCI/PCI Express^®
Applications
InfiniBand^SM
Base Stations
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
♦ UL Certification Record E211395
Pin Configuration
TOP VIEW
GND 1
VRAMP 2
TIMER 3
ILIM 4
+
DS4560
8 V_CC
7 LOAD
6 LOAD
5 LOAD
SO (150 mils)
Ordering Information
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
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Pin Description
PIN
1
2
3
4
5, 6, 7
8
NAME
FUNCTION
GND
Ground. This is also a heat sink for the
device.
VRAMP
TIMER
ILIM
LOAD
V_CC
Output-Voltage Ramp Adjustment
Power-Up Timer/Enable
Current-Limit Adjustment
Output Load Connection (MOSFET Source)
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.
________________________________________________________________ Maxim Integrated Products 1
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.