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High-voltage LDOs aimed at direct-to-battery car apps

29 Aug 2014

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Texas Instruments (TI) has unveiled 17 additional AEC-Q100-qualified, high-voltage devices for automotive and industrial applications to expand its line-up of low drop-out regulators (LDOs). According to the company, the 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.

The LDOs achieve quiescent current as low as 10uA in standby mode, resulting in lower power consumption and increased battery life. The devices also allow designers to have the flexibility to choose from a range of output capacitors including ceramic, to reduce system cost and increase stability. The LDOs support input voltages of up to 40V for normal operation and up to 45V to support transient spikes in automotive designs. Additionally the TPS7A1601-Q1 can support up to 60V normal operation for trucks and heavy-duty equipment. 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. Additionally, the integrated window watchdog enables customers to meet the functional safety requirements on the system level.

High-voltage LDO

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, noted TI.

The TPS7A16xx-Q1 LDOs are available in an 8-pin MSOP-PowerPad package priced at $1.65 in 1,000-unit quantities. The TPS7A66xx-Q1 LDOs are available in an 8-pin MSOP-PowerPad package priced at $0.60 in 1,000-unit quantities. The TPS7B67xx-Q1 LDOs are available in a 20-pin HTSSOP package priced at $0.80 in 1,000-unit quantities.

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