Vishay Releases LDO Controller With Adjustable & Fixed Output Voltage Options

Vishay Intertechnology, Inc. released an LDO controller with adjustable and fixed output voltage options that uses external n-channel MOSFETs to provide extremely low drop-out voltages of under 50mV at very high currents, up to 7A, with 80% efficiency.

The SiP21301 device is optimized for driving n-channel MOSFETs to power FPGAs, ASICs, and ASSPs in game consoles, set top boxes, LCD televisions, and networking equipment. Because it works with an external n-channel MOSFET with a separate supply voltage, the SiP21301 allows designers to choose the FET with the on-resistance, drop-out voltage, output current, and power dissipation ratings that best suit their applications, operating from 2.5V down 0.65V at up to 7A. The 80% efficiency of the SiP21301 solution helps to reduce energy consumption in end products while simplifying the design of dc-to-dc converters.

Designed to maintain regulation while delivering 7A peak current, the new SiP21301 is suitable for systems that have a high surge current upon turn-on and very low drop-out voltage requirements. The SiP21301 features programmable inrush current protection on start up, short-circuit protection, thermal shutdown, and under-voltage lockouts for safe operation of the IC and the external MOSFET.

The controller offers an adjustable output voltage, as well as fixed 1.2 and 1.5V output voltage options. The device provides a low operating current, a low standby current, and a 1% output voltage accuracy. The SiP21301 is available in the compact, lead (Pb)-free MSOP8 package and operates over a –40 to +125°C junction temperature range.

Samples and production quantities of the new SiP21301 LDO controller are available now, with lead times of 8 to 12 weeks for initial orders.