ISL6174 Datasheet, PDF (1/16 Pages) Intersil Corporation – Dual Low Voltage Circuit Breaker

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Data Sheet
December 19, 2008
ISL6174
FN6830.0
Dual Low Voltage Circuit Breaker
This IC targets dual voltage hot swap applications across the
+2.5V to +3.3V (nominal) bias supply voltage range with a
second lower voltage rail down to less than 1V where a circuit
breaker response to an over current event is preferred.
It features a charge pump for driving external N-Channel
MOSFETs, accurate programmable circuit breaker current
thresholds and delay output undervoltage monitoring and
reporting and adjustable soft-start.
The circuit breaker current level (I_CB) for each rail is set by
two external resistors, and for each rail a delay (t_CB) is set by
an external capacitor on the TCB pin. After t_CB has expired,
the IC then quickly pulls down the associated GATE(s)
output turning off its external FET(s).
Ordering Information
PART NUMBER PART
(Note)
MARKING
TEMP.
RANGE
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL6174IRZ* ISL6174 IRZ -40 to +85 28 Ld 5x5 QFN L28.5x5
ISL617XEVAL1Z Evaluation Platform
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach materials,
and 100% matte tin plate plus anneal (e3 termination finish, which is
RoHS compliant and compatible with both SnPb and Pb-free soldering
operations). Intersil Pb-free products are MSL classified at Pb-free
peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
Pinout
ISL6174
(28 LD QFN)
TOP VIEW
28 27 26 25 24 23 22
SNS1 1
21 SNS2
VO1 2
20 VO2
SS1 3
19 SS2
GT1 4
18 GT2
FLT1 5
17 FLT2
PG1 6
16 PG2
TCB1 7
15 TCB2
8 9 10 11 12 13 14
Features
• Fast Circuit Breaker Quickly Responds to Overcurrent
Fault Conditions
• Less than 1µs Response Time to Dead Short
• Programmable Circuit Breaker Level and Delay
• Two Levels of Overcurrent Detection Provide Fast
Response to Varying Fault Conditions
• Overcurrent Circuit Breaker and Fault Isolation Functions
• Adjustable Circuit Breaker Threshold as Low as 20mV
• Adjustable Voltage Ramp-up for In-Rush Protection
During Turn-On
• Rail Independent Control, Monitoring and Reporting I/O
• Dual Supply Hot Swap Power Distribution Control to <1V
• Charge Pump Allows the Use of N-Channel MOSFETs
• QFN Package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package Footprint, Which Improves
PCB Efficiency and has a Thinner Profile
• Pb-Free (RoHS Compliant)
Applications
• Power Supply Sequencing, Distribution and Control
• Hot Swap / Electronic Circuit Breaker Circuits
V1(IN)
R_SNS1
V1(OUT)
EN1 EN2 ^{VS1 SNS1 GT1 VO1}
UV1
BIAS
CPQ+
PG1
FLT1
SS1
CPQ-
CPVDD
ISL6174
OCREF
SS2
FLT2
PGND
PG2
GND
UV2
TCB1 TCB2 VS2 SNS2 GT2 VO2
V2(IN)
R_SNS2
FIGURE 1. TYPICAL APPLICATION
V2(OUT)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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