DC/DC controllers offer 0.5V to 5.5V output voltage

Intersil has released its DC/DC controllers that combine fast transient response with the flexibility of a digital PMBus interface. The ISL68200 with integrated 4A MOSFET drivers can directly drive external MOSFETs, while the ISL68201 with PWM output can be paired with a DrMOS power stage to create a complete voltage regulator solution, detailed the company.

The company's R4 modulation technology provides a compensation-free control loop for optimal transient response. R4 offers both variable-frequency and variable duty-cycle control, reducing load step deviation by up to 67 per cent and peak-to-peak deviation by up to 46 per cent. In addition, a PFM operating mode can be enabled to improve light-load efficiency.

Integrated LDO regulators provide controller bias voltage, allowing single-supply operation. Input voltage ranges from 4.5V to 24V. The controllers provide an output voltage of 0.5V to 5.5V with DAC accuracy of ±0.5 per cent. Both the ISL68200 and ISL68201 include a PMBus/SMBus/I2C interface operating at up to 1.25MHz for device configuration, telemetry, and fault reporting.

The single-phase synchronous PWM controllers provide POL conversions for FPGAs, DSPs, ASICs, processors, and general-purpose system rails. The ISL68200 and ISL68201 are supplied in 24-lead, 4mm x 4mm QFN packages and operate over a temperature range of -40°C to 85°C.

- Susan Nordyk
??EDN