ISL8002B Compact Synchronous Buck Regulator

Renesas' 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 R_DS(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.

Applications

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