ISL6173DRZA Intersil, ISL6173DRZA Datasheet - Page 4

• Manufacturer Part Number: ISL6173DRZA
• Description: IC CTRLR HOT SWAP DUAL LV 28QFN
• Manufacturer: Intersil
• Type: Hot-Swap Controllerr

Specifications of ISL6173DRZA

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 2.25 V ~ 3.63 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-VFQFN Exposed Pad
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Descriptions
PIN
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
CPVDD
OCREF
NAME
CPQ+
SNS2
CPQ-
BIAS
FLT2
PG2
VO2
UV2
EN2
EN1
UV1
CT2
GT2
SS2
VS2
VS1
Charge Pump Capacitor
Low Side
Chip Bias Voltage
Charge Pump Capacitor
High Side
Charge Pump Output
Timer Capacitor
Power Good Output
Fault Output
Gate Drive Output
Soft-Start Duration Set
Input
Output Voltage 2
Current Sense Input
Current Sense
Reference
Undervoltage Monitor
Input
Enable
Ref. Current Adj.
Enable Input
Undervoltage Monitor
Input
Current Sense
Reference
(Continued)
FUNCTION
4
Flying cap lowside.
Provides IC Bias. Should be 2V to 4V for IC to function normally. This pin can be powered from a
supply voltage that is not being controlled. It is preferable to use 3.3V even if the channels being
controlled are 2.5V or lower because more gate drive voltage will be available to the MOSFETs.
Flying cap highside. Use of 0.1µF for 2.5V bias and 0.022µF for 3.3V bias is recommended.
This is the voltage used for some internal pullups and bias. Use of 0.47µF (minimum) is
recommended.
Same function as pin 7
Same function as pin 6
Same as pin 5
Same as pin 4
Same as pin 3
Same as pin 2
Same as pin 1
Voltage input for one of the two voltages. Provides a 20µA current source for the ISET series resistor
which sets the voltage to which the sense resistor IR drop is compared.
This pin is one of the two inputs to the undervoltage comparator. The other input is the 633mV
reference. It is meant to sense the output voltage through a resistor divider. If the output voltage
drops so that the voltage on the UV pin goes below 633mV, PG2 is deasserted.
This is an active low input. When asserted (pulled low), the SS and gate drive are released and the
output voltage gets enabled. When deasserted (pulled high or left floating), the reverse happens.
Allows adjustment of the reference current through R
resistor, thus setting the thresholds for CR, OC and WOC.
Same as pin 24
Same as pin 23
Same as pin 22
ISL6173
DESCRIPTION
SET
and the internal current regulation set
January 3, 2006
FN9186.3