The ISL8121 is a two-phase buck PWM controller featuring an input voltage range of 3V to 20V and integrated MOSFET drivers. Precision voltage regulation is provided for point-of-load and other high-current applications that require efficient and compact implementation. Multiphase buck converter architecture uses interleaved timing to multiply channel ripple frequency allowing smaller filter inductors and reducing input and output ripple currents due to the ripple cancellation effect. Lower ripple results in fewer input and output capacitors. Smaller and low cost transistors can be used resulting from the higher efficiency and reduced power dissipation. The ISL8121 offers an internal 0.6V reference with a system regulation accuracy of ±0.8% (Industrial Temperature range), an optional external reference input, and user-adjustable switching frequency. Unity gain differential amplifier targeted at remote voltage sensing capability enhances the regulation. A power good signal (PGD) is issued when the output voltage is within the regulated window. An internal shunt regulator with optional external connection capability extends the operational input voltage range. For applications requiring voltage tracking or sequencing, the ISL8121 offers a host of possibilities, including coincidental, ratiometric, or offset tracking, as well as sequential startups, user adjustable for a wide range of applications. Additional features include overvoltage and overcurrent protection. Overcurrent protection can be tailored to various applications with no need for additional parts. The ISL8121 uses cost and space-saving rDS(ON) sensing for channel current balance, dynamic voltage positioning, and overcurrent protection. Channel current balancing is automatic and accurate with the integrated currentbalance control system.
Title | Type | Date | |
---|---|---|---|
PDF1.17 MB
|
Datasheet
|
||
PDF509 KB
|
Application Note
|
||
PDF397 KB
|
Application Note
|
||
PDF326 KB
|
Product Change Notice
|
||
PDF398 KB
|
Product Change Notice
|
||
PDF151 KB
|
Product Change Notice
|
||
PDF110 KB
|
Product Change Notice
|
||
PDF106 KB
|
Product Change Notice
|
||
PDF183 KB
|
Product Change Notice
|
||
PDF173 KB
|
Product Change Notice
|
||
PDF79 KB
|
Product Change Notice
|
||
PDF248 KB
|
Product Change Notice
|
||
PDF846 KB
|
White Paper
|
Title | Type | Company |
---|---|---|
iSim:PE Offline Simulation TooliSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.Downloads: | Simulator | Renesas |
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.