Voltage regulators connect directly to car battery

August 20, 2014 // By Christoph Hammerschmidt
With the introduction of 17 new AEC-Q100-qualified high-voltage LDOs, Texas Instruments further broadens its portfolio of low drop-out regulators. Designed for applications that connect directly to a car or truck battery, the new LDOs feature 60V input and ultra-low quiescent current. Target applications include instrument cluster, power steering, infotainment systems, door modules and lighting controls.

Key features and benefits of the new LDOs:

  • Ultra-low quiescent current extends battery life: The 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.

The range of the new products include the following types: TPS7A16xx-Q1 (60V input), TPS7B67xx, TPS7A66xx-Q1 and TPS7B4250-Q1. The TPS7A16xx-Q1 LDOs are available in an 8-pin MSOP-PowerPad package priced at US$1.65 in 1,000-unit quantities. The TPS7A66xx-Q1 LDOs are available in an 8-pin MSOP-PowerPad package priced at US$0.60 in 1,000-unit quantities. The TPS7B67xx-Q1 LDOs are available in a 20-pin HTSSOP package priced at US$0.80 in 1,000-unit quantities.

Evaluation modules and SPICE simulation models als design support tools are also available.