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Ultra-low quiescent current, high-voltage LDOs

20th August 2014


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 60-V 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 and benefits of the new LDOs:

* Ultra-low quiescent current extends battery life: The new LDOs achieve quiescent current as low as 10 uA in standby mode, resulting in lower power consumption and increased battery life.

* 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.

* 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.

* 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.

* Integrated window watchdog supports functional safety: The integrated window watchdog enables customers to meet the functional safety requirements on the system level. 

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









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