2.5A Regulator with Integrated High-side MOSFET for Synchronous Buck or Boost Buck Converter

The ISL85403 is a 40V, 2.5A synchronous buck or boost buck controller with a high-side MOSFET and low-side driver integrated. In buck mode, the ISL85403 supports a wide input range of 3V to 40V. In boost-buck mode, the input range can be extended down to 2.5V and output regulation can be maintained when VIN drops below VOUT, enabling sensitive electronics to remain on in low input voltage conditions.

Features

? Buck mode: input voltage range 3V to 40V (refer to “Input Voltage” on page 15 for more details)

? Boost mode expands operating input voltage lower than 2.5V (refer to “Input Voltage” on page 15 for more details)

? Selectable forced PWM mode or PFM mode

? 300μA IC quiescent current (PFM, no load); 180μA input quiescent current (PFM, no load, VOUT tied to AUXVCC)

? Less than 5μA (MAX) shutdown input current (IC disabled)

? Operational topologies

- Synchronous buck

- Non-synchronous buck

- Two-stage boost buck

- Non-inverting single inductor buck boost

? Programmable frequency from 200kHz to 2.2MHz and frequency synchronization capability

? ±1 tight voltage regulation accuracy

? Reliable overcurrent protection

- Temperature compensated current sense

- Cycle-by-cycle current limiting with frequency foldback

- Hiccup mode for worst case short condition

? 20 Ld 4x4 QFN package

? Pb-free (RoHS compliant)

Applications

? General purpose

? 24V bus power

? Battery power

? Point-of-load

? Embedded processor and I/O supplies

ISL85403DEMO1Z屬于開(kāi)發(fā)板，套件，編程器 > 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS。瑞薩科技有限公司制造生產(chǎn)的ISL85403DEMO1Z評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS該系列產(chǎn)品提供了一種方便的方法，可對(duì)開(kāi)關(guān)模式電源轉(zhuǎn)換所用的器件（包括 DC-DC 和 AC-DC 型）進(jìn)行性能或特性評(píng)估?！胺€(wěn)壓器”（包含內(nèi)部電源開(kāi)關(guān)裝置）和“控制器”（設(shè)計(jì)為控制外部電源開(kāi)關(guān)）之類的器件均包括在內(nèi)。