BD91xx Series: Current Mode Step-Down Switching Regulator

The SLLM technique enables BD91x series regulators to seamlessly transfer to / from conventional PWM control depending on load conditions. This dual mode of operation improves the efficiency by 100% to 200% over standard PWM controllers that typically ignore the low-power operating regime. In addition, current mode feedback assures fast response to load changes and prevents operational performance problems in voltage-sensitive devices.
During the last year many new derivates of this family came into the market and completed the product portfolio of high efficient switching regulators. Next steps are the introduction of a higher switching frequency to have a better EMI behaviour and the increase of the supply voltage range down to an input of 2.3V.

Some of the key features are:
* Single, dual and triple channel output
* Input voltage up to 13.2 V (BD9141)
* Output current ratings up to 4.0A (BD9137)
* Fixed and variable output voltage (set by resistor selection)
* Output voltage accuracy of ±1.5 or ±2.0%
* Standard switching frequency is 1 MHz (BD9180/BD9192: 2MHz)
* High efficiency due to SLLM^TM technology

Full line-up on: http://www.rohm.com/products/lsi/power/1chip_fet/single-chip/