New Industry Products

2.25-MHz 300-mA Step-Down Converter in DDC/TSOT23

March 22, 2018 by Paul Shepard

The TPS6224x-Q1 devices from Texas Instruments are high-efficiency synchronous dc-dc step-down converters providing a fixed output voltage and up to 300mA of output current. They offer low power consumption for battery-powered/always-on automotive applications like Remote Keyless Entry (RKE) or Passive Entry Passive Start (PEPS) key fobs and base stations.

With an input voltage range of 2 V to 6 V, the devices support applications powered by Li-MnO2 coin cell batteries, Li-Ion batteries, two- (2S) and three-cell (3S) alkaline, 3.3-V and 5-V input voltage rails. Applications are expected to include remote keyless entry (RKE), passive entry passive start (PEPS), and advanced driver assistance systems (ADAS) such as front cameras, surround view and parking assist.

The TPS6224x-Q1 operate at a 2.25-MHz fixed switching frequency at high load current and enters the power-save mode operation at light load currents to maintain high efficiency and low power consumption over the entire load current range.

The power-save mode is optimized for low output-voltage ripple. In the shutdown mode, the current consumption is reduced to less than 1 µA. The TPS6224x-Q1 allow the use of small inductors and capacitors to achieve a small solution size, and is available in a 5-pin TSOT23 package.

Features

  • AEC-Q100 qualified with following results:
    • Device temperature grade 1: -40°C to 125°C operating junction temperature range
  • Output current up to 300 mA
  • VIN Rrnge from 2V to 6V
  • 25-MHz fixed-frequency operation in pwm mode
  • Power-save mode at light load currents
  • Output voltage accuracy in pwm mode ±1.5%
  • Fixed output voltages
    • 80V TPS62243-Q1
    • 25V TPS62244-Q1
  • 15-µA typical quiescent current
  • 100% duty cycle for lowest dropout
  • Available in a TSOT 23 (5) 2.90-mm × 1.60-mm package