ISL6186 Datasheet, PDF (7/18 Pages) Intersil Corporation – USB Port Power Supply Controller

ISL6186
Electrical Specifications V_IN = 5V, T_A = T_J, 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
MAX
(Note 8) TYP (Note 8)
UNITS
Ren_h
ENABLE Pull-Down Resistor
Enable asserted high options
0.6
1
1.55
MΩ
Ren_l
ENABLE Pull-Up Resistor
Enable asserted low options
0.6
1
1.55
MΩ
t_ON
Enable to Output Turn-on Time
R_L = 10Ω, C_L = 10µF, Enable 50% to Output 90%
-
0.1
-
ms
t_OFF
Enable to Output Turn-off Time
R_L = 10Ω, C_L = 10µF, Enable 50% to Output 10%
-
0.25
-
ms
t_pdPGr
Enable to Power Good Output Rising Disable to Power-Good De-assert
Time
-
30
-
ns
PG Vth
Power Good Threshold
PGN Vth Power Not Good Threshold
t_Vthr2PG PG Vth to PG Falling
t_Vthf2PG PGN Vth to PG Rising
BIAS PARAMETERS
PGD pulls low when V_OUT/V_IN
PGD release high when V_OUT/V_IN
PG delay after PG Vth
PG delay after PGN Vth
88
91
95
%
78
86
93
%
-
1.5
-
µs
-
45
-
µs
I_VDD
I_VDD
V_UVLO
I_VR
Temp_dis
Enabled V_IN Current
Disabled V_IN Current
Rising POR Threshold
Reverse Blocking Leakage Current
Over-Temperature Disable
Switches Closed, OUTPUT = OPEN
Switches Open, OUTPUT = OPEN
V_IN Rising to functional operation
V_IN = 0V, V_OUT = 5V
-
57
75
µA
-
3.5
5.5
µA
-
2.1
2.3
V
-
0.3
2.0
µA
-
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.
Introduction
The ISL6186 is a single channel overcurrent (OC) fault protection
IC for the +2.5V to +5V environment. Each ISL6186 has a 45mΩ
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 V_IN = 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 V_IN > V_UVLO 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 t_CL 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 V_OUT>90% of V_IN and rises after V_OUT< 85%
of V_IN.
7
FN7698.1
September 1, 2011