Automotive-Grade Controller Boasts up to 100-V Output Over 3V to 65V Input Range

Texas Instruments Incorporated (TI) has introduced three wide-input voltage synchronous boost controllers with high efficiency and high power density. The LM5122Q multi-phase boost controller features the industry's widest input (3V to 65V) and output (up to 100V) voltage range. The low quiescent-current TPS43060 and TPS43061 boost controllers feature 1-MHz operation and a small QFN package.

TI's new synchronous boost controllers increase efficiency by up to 10-percent over non-synchronous boost controllers by replacing the freewheeling diode with a synchronous switch. Lossless inductor DCR current sensing further improves efficiency and reduces heat dissipation to save board space and lower bill of materials cost. Each boost controller features thermal shutdown, frequency synchronization, hiccup-mode current limit and an adjustable line under-voltage lockout.

The LM5122Q is an AEC-Q100-qualified synchronous boost controller with a 3-V to 65-V input and up to 100-V output voltage range. The controller can be configured easily for interleaved multi-phase operation, which is required for high power applications like start-stop voltage stabilizers and high power audio amplifiers. A powerful 3-A gate drive circuit supports voltages up to 16-V, enabling flexibility to tune the step-up dc-dc for efficiency and size.

The TPS43060 and TPS43061 are low quiescent-current synchronous boost controllers with an input voltage range from 4.5 V to 38 V and an output voltage range of up to 60 V. The TPS43060 provides a 7.5-V gate drive, which drives a broad range of low-cost MOSFETs. The TPS43061 provides a 5.5-V gate drive, optimized for low Qg MOSFETs, such as TI's CSD86330Q3D synchronous buck NexFET(TM) Power Block, which saves up to 50-mm(2) of board area. Applications include tablet and notebook USB charging adapters, and industrial test and measurement equipment.

The synchronous boost controllers join TI's family of step-up power products that include the TPS55340, a 40-V boost converter with an integrated 60-milliohm MOSFET.

The TPS43060 and TPS43061 are available in volume now from TI and its authorized distributors. Offered in a 16-pin QFN PowerPad(TM) package that measures 3 mm by 3 mm by 0.75 mm, the TPS43060 and TPS43061 are priced at $1.40 in 1,000-unit quantities.

Samples and production quantities of the LM5122Q are expected to be available in the second quarter. Offered in a 20-pin TSSOP package that measures 6.5-mm by 4.4-mm by 0.9-mm, the LM5122Q is priced at US$2.10 in 1,000-unit quantities.