Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

ISL6119LIBZA Datasheet(PDF) 5 Page - Renesas Technology Corp

Part # ISL6119LIBZA
Description  USB Dual Port Power Supply Controller
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ISL6119LIBZA Datasheet(HTML) 5 Page - Renesas Technology Corp

  ISL6119LIBZA Datasheet HTML 1Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 2Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 3Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 4Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 5Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 6Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 7Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 8Page - Renesas Technology Corp ISL6119LIBZA Datasheet HTML 9Page - Renesas Technology Corp Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 13 page
background image
ISL6119
FN9002 Rev 3.00
Page 5 of 13
March 2004
Introduction
The ISL6119 is a fully independent dual channel overcurrent
(OC) fault protection IC for the +2.5V to +5.5V environment.
Each ISL6119 incorporates in a single 8 lead SOIC package
two 80mW N-channel MOSFET power switches for power
control. Independent enabling inputs and fault reporting
outputs compatible with 3V and 5V logic allows for external
control and monitoring. This device features internal current
monitoring, accurate current limiting, integrated power
switches and current limited timed delay to latch-off for system
protection. See Figure 1 for typical operational waveforms
including both under and overcurrent situations.
Key Feature Description and Operation
UV Lock Out
The ISL6119 undervoltage lockout feature prevents
functionality of the device unless the correct ENABLE state
and VIN > 2.5V are present.
Soft Start
A constant 500nA current source ramps up the switch’s gate
causing a voltage follower effect on the output voltage. This
provides a soft start turn-on eliminating bus voltage drooping
caused by in-rush current charging heavy load capacitances.
Rising and falling outputs are current limited voltage ramps so
that both the inrush current and voltage slew rate are limited,
independent of load. This reduces supply droop due to surge
and also eliminates the need for EMI filters necessary on other
IC products.
Fault Blanking On Start-Up
During initial turn-on the ISL6119 prevents nuisance faults
being reported to the system controller by blanking the fault
signal for 12ms. This blanking eliminates the need for external
RC filters necessary for other vendor products that assert a
fault signal upon initial turn-on into a temporary high current
condition. See Figures 10 through 12 for waveform examples.
Current Regulation
The ISL6119 has integrated current sensing on the power
MOSFET that allows for rapid control of OC events. Once an
OC is detected the ISL6119 goes into its current regulation
(CR) control mode. The ISL6119 CR level is set to a nominal
1A. This current regulation is
25% over the full operating
temperature and voltage bias range. See Figures 4 and 5 for
illustrative curves. The speed of this control is inversely related
to the magnitude of the OC fault. Thus a hard overcurrent is
more quickly controlled than a marginal OC condition. See
Figure 6 for waveforms illustrating this and Figure 7 for an
accompanying graph.
Over Temperature Shutdown
Although the ISL6119 has a thermal shutdown feature,
because of the 12ms timed shutdown this will only be invoked
in extremely high ambient temperatures
Latch-Off Time Delay
The primary function of any OC protection device is to quickly
isolate the voltage bus from a faulty load. Unlike many other IC
products that sense the IC thermal condition (the monitored IC
junction temperature depends on a number of factors the most
important of which are power dissipation of the faulted and
adjacent switches and package temp) to isolate a faulty load,
the ISL6119 uses an internal 12ms timer that starts upon OC
detection. Once an OC condition is detected the appropriate
output is current limited for a maximum of 12ms to allow
transient conditions to pass before latch-off. This time to latch-
off is independent of device thermal or adjacent switch
condition. See Figure 18 for waveforms illustrating
independent latch-off.
If, after the ISL6119 has latched off, and the fault has asserted
and, the enable is not deasserted but the OC condition still
exists, the ISL6119 unlike other IC devices does not send to
the controller a continuous string of fault pulses. The ISL6119’s
single fault signal is sent at the time of latch-off unlike other
devices.
Slow And Fast Shutdown
The ISL6119 has two shutdown modes. When turned off with a
load current less than the current regulation (CR) level the
ISL6119 shuts down in a controlled manner using a 500nA
constant current source controlled ramp. When latched off due
to CR and the timer has expired, the ISL6119 quickly pulls
down the output thereby quickly removing the faulted load from
the voltage bus. See Figures 8 and 9 for waveforms of each
mode.
Active Output Pulldown
Another unique ISL6119 feature is the active pull down on the
outputs to 300mV above GND when the device is disabled.
Competitors’ parts’ switch leakage causes the output voltage to
drift up to VIN voltage even when the part is supposed to be
disabled.
OFF
ON
FAULT
LATCH-OFF SET
RESET BY
ENABLE
VOUT
CURRENT
REGULATION
SETTLING TIME
(1.4ms)
OVER CURRENT
12ms CURRENT REGULATION PERIOD
1A CURRENT
LIMIT
ENABLE
IOUT
FIGURE 1. TYPICAL OPERATIONAL WAVEFORMS


Similar Part No. - ISL6119LIBZA

ManufacturerPart #DatasheetDescription
logo
Intersil Corporation
ISL6119LIBZA INTERSIL-ISL6119LIBZA Datasheet
491Kb / 13P
   USB Dual Port Power Supply Controller
ISL6119LIBZA INTERSIL-ISL6119LIBZA Datasheet
494Kb / 13P
   USB Dual Port Power Supply Controller
March 2004
ISL6119LIBZA-T INTERSIL-ISL6119LIBZA-T Datasheet
491Kb / 13P
   USB Dual Port Power Supply Controller
More results

Similar Description - ISL6119LIBZA

ManufacturerPart #DatasheetDescription
logo
Intersil Corporation
ISL6119 INTERSIL-ISL6119 Datasheet
491Kb / 13P
   USB Dual Port Power Supply Controller
logo
Renesas Technology Corp
ISL6185 RENESAS-ISL6185 Datasheet
945Kb / 20P
   Dual USB Port Power Supply Controller
ISL6436 RENESAS-ISL6436 Datasheet
796Kb / 13P
   USB Dual Port Power Supply Controller
Aug 10, 2001
logo
Intersil Corporation
ISL6119LIB INTERSIL-ISL6119LIB Datasheet
494Kb / 13P
   USB Dual Port Power Supply Controller
March 2004
ISL6185 INTERSIL-ISL6185 Datasheet
400Kb / 20P
   Dual USB Port Power Supply Controller
ISL6436 INTERSIL-ISL6436 Datasheet
902Kb / 12P
   USB Dual Port Power Supply Controller
ISL61851ACBZ INTERSIL-ISL61851ACBZ Datasheet
780Kb / 20P
   Dual USB Port Power Supply Controller
March 8, 2012
logo
Renesas Technology Corp
ISL6186 RENESAS-ISL6186 Datasheet
873Kb / 18P
   USB Port Power Supply Controller
logo
Intersil Corporation
ISL6186 INTERSIL-ISL6186 Datasheet
722Kb / 18P
   USB Port Power Supply Controller
ISL6185 INTERSIL-ISL6185_11 Datasheet
745Kb / 20P
   Dual USB Port Power Supply Controller 2.5V to 5V Operating Range
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com