Extremely Low-Dropout 1.5 A Voltage Regulators

By Toshiba Semiconductor and Storage 59

Extremely Low-Dropout 1.5 A Voltage Regulators

The latest technology for image sensors and Wi-Fi chips can be quite power hungry. For example, analog and digital rails need to be low-noise, yet some need to support peak currents up to 1.5 A. Toshiba's latest ultra-low dropout LDOs are great for this, providing great efficiency by means of super low dropout voltage, and can effectively regulate voltage on sensitive power rails.

Toshiba's Nch LDOs provide a great alternative to DC-DC converters if users can take advantage of their extremely low dropout. For example, a 1.05 V/1 A rail can be cleanly regulated from a 1.2 V DC-DC input, and it will provide 95 dB of ripple rejection. Nch LDOs will also save on board space, primarily because inductors will not need to be used.

Features
  • Toshiba's smallest 1.5 A LDO in a 0.8 mm x 1.2 mm CSP package
  • 95 dB (typ) PSRR @ 1 kHz
  • Fixed-output voltage, available between 0.65 V and 3.6 V
    • Toshiba can provide LDOs in 50 mV steps; contact Digi-Key for more information
  • Also available in adjustable voltage type, resistor-programmed
  • Regulated voltage stays within ±115 mV during transient load conditions
  • 1% voltage accuracy
  • 125 mV dropout (typ) @ 1 V/1.5 A output
  • Thermal shutdown if overheated
  • Inrush current reduction
  • Overcurrent protection
  • Enable pin
Applications
  • Voltage regulation up to 1500 mA
  • 1.0 V, 1.1 V, 1.2 V power rails for analog CMOS sensors
  • Wi-Fi power rails
  • DC-DC replacement for low-voltage bucking
  • For subsystems with access to battery power or 5 V rail
  • Projects requiring small board space

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