ISL6111 Intersil Corporation, ISL6111 Datasheet - Page 4

• Manufacturer Part Number: ISL6111
• Description: Current Regulated Pci Hot Plug Power Switch Controller The ISL6111 is Designed For Use in Pci And Pci-x Applications Where Active Current Regulation Protection of The Motherboard From an Abnormal Pci Load Card is Desired.
• Manufacturer: Intersil Corporation

Pin Descriptions
PIN NO.
12, 13
3, 14
2, 4
10
11
15
16
17
18
19
20
1
5
6
7
8
9
DESIGNATOR
PGOOD
5VISEN
3VISEN
M12VG
M12VO
CRSET
CRTIM
M12VI
12VO
FLTN
GND
3VG
12VI
5VG
5VS
3VS
EN
Gate of Internal NMOS Connect a 5nF capacitor between M12VG and ground to stabilize the start-up ramp for the
Current Regulation Set Program current regulation levels for all four switches by connecting a resistor to GND. This
3.3V FET Gate Output Drives the gate of the 3.3V MOSFET. Connect to the gate of the external N-Channel
Switched -12V Output Switched -12V Output.
IC Ground Reference
Switched 12V Output
5V FET Gate Output
3.3V Current Sense
Current Regulation
5V Current Sense
4
Fault Indication
Duration Input
Power Good
Enable Input
3.3V Source
FUNCTION
5V Source
-12V Input
12V Input
MOSFET. At turn-on the FET gate capacitance will be charged to 12VIN voltage by a 10µA
current source. An optional capacitor from this node to ground will adjust the turn-on ramp.
+12V IC bias supply and power supply rail input to internal power switch.
Connect to common of power supplies.
An open drain logic output that is released to indicate all positive voltage outputs are above
minimum PCI spec. Connect to V(I/O) through resistor.
An external capacitor from this pin to ground sets the current regulation duration before
latch off. This output will pull low after the current regulation duration has expired. CR
duration = 150K x CTIM. This pin sources 20µA and has a threshold trip voltage of 2.83V.
A fault-not open drain output. Latches low once current regulation time has expired. Reset
by 12VIN POR condition or enable input signaled low. Connect to V(I/O) through resistor.
Connect to the load side of the current sense resistor in series with source of external 5V
MOSFET. Monitors voltage to load.
Connect to source of 5V MOSFET switch. This connection along with 5VISEN senses the
voltage drop across the sense resistor.
Controls all four internal and external switches, initiates turn-on/off
Drives the gate of the 5V MOSFET. Connect to the gate of the external N-Channel
MOSFET. At turn-on the FET gate capacitance will be charged to 12VIN voltage by a 10µA
current source. An optional capacitor from this node to ground will adjust the turn-on ramp
Switched 12V output.
M12V supply. This capacitor is charged with 25µA during start-up.
-12V Supply Input. Also provides power to the -12V current regulation circuitry.
pin sources 100µA. See Table 1 for CR level setting formulae.
Connect to the load side of the current sense resistor in series with source of external 3.3V
MOSFET. Monitors voltage to load.
Connect to source of 3.3V MOSFET. This connection along with 3VISEN senses the voltage
drop across the sense resistor.
ISL6111
FUNCTION DESCRIPTION