Overview

Description

The ISL95873 is a Single-Phase Synchronous-Buck PWM controller featuring Renesas' proprietary R4™ Technology. The R4™ modulator has integrated compensation, fast transient performance, accurate switching frequency control, and excellent light-load efficiency. These technology advances, together with integrated MOSFET drivers and a Schottky bootstrap diode, allow for a high-performance regulator that is highly compact and needs few external components. Differential remote sensing of the output voltage is an additional feature. For maximum efficiency, the converter automatically enters diode-emulation mode (DEM) during light-load conditions, such as system standby. The ISL95873 accepts a wide 3. 3V to 25V input voltage range, making it ideal for systems that run on battery or AC-adapter power sources. It also is a low-cost solution for applications requiring tracking of an external reference voltage during soft-start. When the external reference level meets the internal reference voltage, the ISL95873 switches from the external reference to the internal reference. The external reference is only used during soft-start.

Features

  • External reference tracking
  • R4™ modulator technology
  • Internal compensation
  • Fast, optimal transient response
  • Input voltage range: 3.3V to 25V
  • Output voltage range: 0.5V to 3.3V
  • Precision voltage regulation
  • ±0.5% System accuracy over -10°C to +100°C
  • Output voltage remote sense
  • Fixed 300kHz PWM frequency in continuous conduction
  • Proprietary frequency control loop
  • Automatic diode emulation mode for highest efficiency
  • Power-good monitor for soft-start and fault detection

Comparison

Applications

Applications

  • Compact buck regulators requiring external tracking

Documentation

Type Title Date
Datasheet PDF 933 KB
Brochure PDF 5.49 MB 日本語
End Of Life Notice PDF 1.17 MB
Product Change Notice PDF 398 KB
Application Note PDF 509 KB
Application Note PDF 397 KB
6 items

Design & Development

Models