The ISL6545, ISL6545A makes simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter driving N-Channel MOSFETs in a synchronous buck topology. Since it can work with either 5V or 12V supplies, this one IC can be used in a wide variety of applications within a system. The ISL6545, ISL6545A (hereafter referred to as ISL6545x, except as needed) integrates the control, gate drivers, output adjustment, monitoring and protection functions into a single 8 Ld SOIC or 10 Ld DFN package. The ISL6545x provides single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0. 6V, with a maximum tolerance of ±1. 0% over-temperature and line voltage variations. A selectable fixed frequency oscillator (ISL6545 for 300kHz; ISL6545A for 600kHz) reduces design complexity, while balancing typical application cost and efficiency. The error amplifier features a 20MHz gain-bandwidth product and 9V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%. Protection from overcurrent conditions is provided by monitoring the rDS(ON) of the lower MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.
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Type | Title | Date |
Datasheet | PDF 833 KB | |
Brochure | PDF 5.51 MB 日本語 | |
End Of Life Notice | PDF 603 KB | |
Product Change Notice | PDF 326 KB | |
Product Change Notice | PDF 266 KB | |
Product Advisory | PDF 106 KB | |
Product Advisory | PDF 363 KB | |
Product Change Notice | PDF 294 KB | |
Product Change Notice | PDF 108 KB | |
Product Change Notice | PDF 248 KB | |
Application Note | PDF 509 KB | |
Application Note | PDF 397 KB | |
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iSim:PE Offline Simulation Tool iSim 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.
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Simulator | Renesas |
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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.
Select an orderable part number:
Orderable Part ID | Sample |
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ISL6545ACBZ | Availability |
ISL6545ACBZ-T | Availability |
ISL6545AIBZ | Availability |
ISL6545AIBZ-T | Availability |