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ISL61862BIRZ Datasheet(PDF) 7 Page - Intersil Corporation

Part # ISL61862BIRZ
Description  USB Port Power Supply Controller
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL61862BIRZ Datasheet(HTML) 7 Page - Intersil Corporation

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ISL6186
7
FN7698.1
September 1, 2011
Introduction
The ISL6186 is a single channel overcurrent (OC) fault protection
IC for the +2.5V to +5V environment. Each ISL6186 has a 45m
Ω
P-channel MOSFET power switch for power control. An enabling
input and fault reporting output compatible with 2.5V to 5V logic
allows for external control and reporting. This device features an
integrated power switch with current monitoring, accurate
current limiting, reverse bias protection, and current limited
timed delay to turn-off for system reliability. See Figures 11
through 27 for typical operational waveforms including both
undercurrent and overcurrent situations.
The ISL6186 offers current sense and limiting with VIN =5V to
guarantee continuous current levels of 1.5A, 3A and 3.6A, making
these devices well suited for a myriad of USB and other low-power
(18W max) port power management applications and
configurations.
The ISL6186 also provides thermally insensitive timed OC turn-off
and fault notification, isolating and protecting the voltage bus in the
event of a peripheral OC or short circuit independent of the ambient
thermal condition.
The ISL6186 undervoltage lockout feature prevents turn-on of
the output unless the correct ENABLE state and VIN > VUVLO are
present. During initial turn-on, the ISL6186 prevents false fault
reporting by blanking the fault signal.
During operation, once an OC condition is detected, the output
is current limited for tCL to allow transient OC conditions to
pass. If still in current limit after the current limit period has
elapsed, the output is then turned off and the fault is reported
by pulling the FAULT output low. On the latch-off options, after
turn-off, both the output and the FAULT signal are latched low
until reset by the enable signal being de-asserted or a POR
occurring. At this time, the FAULT signal will clear and the
switch is ready to be turned back on. On the auto restart
options, the ISL6186 will attempt to periodically turn on the
output as long as the enable is asserted.
When disabled, the ISL6186 has a low quiescent supply current
and output to input reverse current flow blocking capability.
The ISL6186 family is provided with enable polarity options and
an industry standard 8 Ld SOIC pinout along with two versions in
the 70% smaller 3x3 DFN. The 8 Ld DFN package offers the
same performance as the 8 Ld SOIC whereas the 10 Ld DFN
offers higher current capability in the smallest possible package
due to its lower package electrical and thermal resistance.
Additionally, the 10 Ld DFN has a Power-Good output PGD that
pulls low 40ms after VOUT>90% of VIN and rises after VOUT<85%
of VIN.
Ren_h
ENABLE Pull-Down Resistor
Enable asserted high options
0.6
1
1.55
M
Ω
Ren_l
ENABLE Pull-Up Resistor
Enable asserted low options
0.6
1
1.55
M
Ω
tON
Enable to Output Turn-on Time
RL = 10Ω, CL = 10µF, Enable 50% to Output 90%
-
0.1
-
ms
tOFF
Enable to Output Turn-off Time
RL = 10Ω, CL = 10µF, Enable 50% to Output 10%
-
0.25
-
ms
tpdPGr
Enable to Power Good Output Rising
Time
Disable to Power-Good De-assert
-
30
-
ns
PG Vth
Power Good Threshold
PGD pulls low when VOUT/VIN
88
91
95
%
PGN Vth
Power Not Good Threshold
PGD release high when VOUT/VIN
78
86
93
%
tVthr2PG
PG Vth to PG Falling
PG delay after PG Vth
-
1.5
-
µs
tVthf2PG
PGN Vth to PG Rising
PG delay after PGN Vth
-
45
-
µs
BIAS PARAMETERS
IVDD
Enabled VIN Current
Switches Closed, OUTPUT = OPEN
-
57
75
µA
IVDD
Disabled VIN Current
Switches Open, OUTPUT = OPEN
-
3.5
5.5
µA
VUVLO
Rising POR Threshold
VIN Rising to functional operation
-
2.1
2.3
V
IVR
Reverse Blocking Leakage Current
VIN = 0V, VOUT = 5V
-
0.3
2.0
µA
Temp_dis
Over-Temperature Disable
-
150
-
°C
Temp_hys
Over-Temperature Hysteresis
-
20
-
°C
NOTE:
8. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
Electrical Specifications VIN = 5V, TA = TJ, Unless Otherwise Specified. Boldface limits apply over the operating temperature
range, 0°C to +75°C or -40°C to +85°C. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
(Note 8)
TYP
MAX
(Note 8)
UNITS


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