Texas Instruments (TI) has added two new step-down regulators with wide input voltages and high-voltage protection. The new 100-V LDO and 60-V DC/DC controller target low- to mid-current, high-voltage telecom and industrial designs, such as motor control, HVAC relay, smart meters and automotive after-market applications.
The TPS7A4001 50-mA LDO has what TI claims is the industry's widest input voltage tolerance with an input voltage of 7 V to 100 V, and achieves a fast settling time of less than 500 nanoseconds for a 50-V transient event. The device comes in an 8-pin, thermally enhanced 3-mm x 5-mm MSOP package and has a low quiescent current of 25 uA.
The TPS40170RGYTTPS40170RGYT synchronous step-down DC/DC controller offers voltage-mode control with input voltage feed-forward compensation while supporting input voltages from 4.5 V to 60 V and output currents up to 12 A. The controller protects against voltage spikes up to 62 V, offers an FET on-time of 75 ns and shutdown current of 1.0 uA. The TPS40170's bi-directional synchronization feature is said to eliminate system beat and EMI noise and reduce input capacitance by up to 50 percent, saving board space.
The TPS7A4001 is available in volume now from TI in an 8-pin, 3-mm x 5-mm MSOP PowerPad package. Suggested resale pricing is $1.90 in 1,000-unit quantities. The TPS40170RGYTTPS40170RGYT controller comes in a 3.5-mm x 4.5-mm QFN with a suggested resale price of $2.40 in 1,000-unit quantities.