Power

Texas Instruments – Ultra-low quiescent current high-voltage LDOs for direct-to-battery auto applications (AEC-Q100)

Aug 20 2014 - Power [More Power Articles]

Broadening its large portfolio of low drop-out regulators (LDOs), Texas Instruments (TI) has introduced 17 new AEC-Q100-qualified, high-voltage LDOs for automotive and industrial applications.

The new ultra-low quiescent current LDOs, including the TPS7A16xx-Q1 with 60V input, TPS7A66xx-Q1 and TPS7B67xx families, and the TPS7B4250-Q1 LDO, support many applications that connect directly to a car or truck battery, such as cluster, power steering and infotainment systems, door modules and lighting controls.

Key features : 1 – Ultra-low quiescent current extends battery life: The new LDOs achieve quiescent current as low as 10uA in standby mode, resulting in lower power consumption and increased battery life. 2 – Internal equivalent series resistance (ESR) compensation can help optimize system cost and stability: Designers have the flexibility to choose from a wide range of output capacitors, including ceramic, to reduce system cost and increase stability. 3 – High input voltage allows automotive subsystems to connect directly to the car battery: The LDOs support input voltages of up to 40 V for normal operation and up to 45 V to support transient spikes in automotive designs. Additionally the TPS7A1601-Q1 can support up to 60-V normal operation for trucks and heavy-duty equipment. 4 – Tracking function allows for more accurate data from the off-board sensors: Tracking provides close to zero tolerance between on-board and off-board power supplies. Tracking helps customers get more accurate data from the off-board sensors. 5 – Integrated window watchdog supports functional safety: The integrated window watchdog enables customers to meet the functional safety requirements on the system level.

Designers can evaluate the AEC-Q100-qualified LDOs using several featured evaluation modules and SPICE simulation models that make it easy to assess and design.

The TPS7A16xx-Q1 LDOs are available in an 8-pin MSOP-PowerPad package. The TPS7A66xx-Q1 LDOs are available in an 8-pin MSOP-PowerPad package. The TPS7B67xx-Q1 LDOs are available in a 20-pin HTSSOP package.

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