1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Negative Voltage Hot Plug Controller
ISL6140, ISL6150
The ISL6140 is an 8 Ld, negative voltage hot plug
controller that allows a board to be safely inserted and
removed from a live backplane. Inrush current is limited
to a programmable value by controlling the gate voltage
of an external N-channel pass transistor . The pass
transistor is turned off if the input voltage is less than the
undervoltage threshold, or greater than the overvoltage
threshold. A programmable electronic circuit breaker
protects the system against shorts. The active low
PWRGD
signal can be used to directly enable a power
module (with a low enable input)
The ISL6150 is the same part, but with an active high
PWRGD signal.
Features
" Low Side External NFET Switch
" Operates from -10V to -80V (-100V absolute max
rating) or +10V to +80V (+100V absolute max
rating)
" Programmable Inrush Current
" Programmable Electronic Circuit Breaker
(overcurrent shutdown)
" Programmable Overvoltage Protection
" Programmable Undervoltage Lockout
" Power Good Control Output
-  PWRGD Active High: (H Version) ISL6150
-  PWRGD
active Low: (L Version) ISL6140
" Pb-free available (RoHS compliant)
Applications
" VoIP (Voice over Internet Protocol) Servers
" Telecom systems at -48V
" Negative Power Supply Control
" +24V Wireless Base Station Power
Related Literature
" ISL6140/50EVAL1 Board Set, AN9967
" ISL6116 Hot Plug Controller, FN9100
NOTE: See www.intersil.com/hotplug for more information.
Typical Application (RL and CL are the Load)
R
5
= 9.09k?(1%)
R
4
= 562k?(1%)
R
6
= 10k?(1%)
C
2
= 3.3nF (100V)
C
1
= 150nF (25V)
Q
1
= IRF530 (100V, 17A, 0.11?
R
2
= 10?(5%)
R
1
= 0.02?(1%)
ISL6140
V
DD
UV
OV
V
EE   SENSE   GATE
DRAIN
PWRGD
R
4
R
5
R
6
R
1
R
2
R
3    C
2
C
1
Q
1
C
L
GND
GND
-48V IN
-48V
OUT
R
L
(LOAD)
R
3
= 18k?(5%)
C
L
= 100礔 (100V)
April 29, 2010
FN9039.4