ISL8002B Compact Synchronous Buck Regulator

By Renesas 137

ISL8002B Compact Synchronous Buck Regulator

Intersil's ISL8002B is a highly-efficient, monolithic, synchronous step-down DC/DC converter that can deliver up to 2 A of continuous output current from a 2.7 V to 5.5 V input supply. It uses peak current mode control architecture to allow very low-duty cycle operation. ISL8002B operates at a 2 MHz switching frequency, thereby providing superior transient response and allowing for the use of small inductor. ISL8002B also has excellent stability. The ISL8002B integrates very low RDS(ON) MOSFETs in order to maximize efficiency. In addition, since the high-side MOSFET is a PMOS, the need for a boot capacitor is eliminated, thereby reducing external component count.

The device can be configured for either PFM (discontinuous conduction) or PWM (continuous conduction) operation at light load. PFM provides high-efficiency by reducing switching losses at light loads and PWM reduces noise susceptibility and RF interference. The device is offered in a space saving 8 Ld 2 mm x 2 mm TDFN lead-free package with exposed pad for improved thermal performance. The complete converter occupies less than 64 mm2 area.

Features
  • VIN range 2.7 V to 5.5 V
  • IOUT maximum is 2 A
  • External soft-start programmable
  • Output tracking and sequencing
  • Switching frequency is 2 MHz
  • Selectable PFM or PWM operation option
  • Overcurrent and short-circuit protection
  • Over-temperature/thermal protection
  • VIN undervoltage lockout and VOUT overvoltage protection
  • Up to 95% peak efficiency

Applications

  • General purpose point-of-load DC/DC
  • Set-top boxes and cable modems
  • FPGA power
  • DVD, HDD drives, LCD panels, TV

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