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TI unveils integrated power controller for automotive applications

26th January 2012

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Texas Instruments Incorporated today introduced a dual output power supply for automotive applications that ensures stable, uninterrupted output voltages, even in cases where the input voltage drops significantly below the output voltage levels. The start/stop function in many new car models increases fuel economy, but also leads to significant drops in the supply voltage when restarting the engine. The TPS43330-Q1 family remains fully functional during such voltage drops and ensures that applications continue to work without interruption or performance reduction. The devices’ ultra-low quiescent current makes the use of a separate standby voltage supply unnecessary, thus reducing system cost and complexity.

Key features and benefits of the TPS43330-Q1 family:
• Wide input voltage range of 2 V to 40 V and transients up to 60 V ensure continued operation, even under severe battery voltage conditions.
• Ultra-low quiescent current as low as 35 uA and lower shutdown current of 5 uA reduces the overall application power consumption from the battery in standby operation, extending battery lifetime and eliminating the need for a standby voltage regulator.
• Spread spectrum frequency modulation reduces conducted electromagnetic interference and allows for simpler, lower-cost filters.
• Individual enable and power good signals for both supply rails allow the customer flexible power sequencing based on specific application needs.
• Integration of multiple voltage rails and voltage supervisors reduces board space, design complexity and system cost compared to a discrete solution.
• Dedicated high-side FET driver enables overall efficiency improvement by bypassing the external reverse-battery protection diode with an external PMOS FET.

Tools and support
TI offers a variety of tools and support to speed design with the Power Stage Designer and Automotive Power reference design for PMP7001.1 and PMP7031. Evaluation modules are also available for the TPS43332-Q1, TPS43335-Q1, and TPS43336-Q1 devices.

In addition to the TPS43330-Q1 DC/DC controller, TI offers a large portfolio of power management ICs aimed at automobile applications, including step-down converters like the TPS57160-Q1 or PIMCs like the TPS65023-Q1. The LM25118Q buck-boost controller and TPIC74101-Q1 buck-boost converter help maintain stable output voltage over a wide supply voltage range.

Availability, packaging and pricing
Samples of the TPS43330-Q1 and TPS43332-Q1 are available now in an HTSSOP-38 (DAP) package. Suggested retail pricing for the TPS43330-Q1 family ranges from US $2.85 to $3.10 in 1000-unit quantities.