The RAR-eSR-qLR Retention Alternating Regulator combines two regulation sub-components: a high-efficiency switching regulator (eSR) and an ultra low quiescent linear regulator (qLR). A Regulation Control Unit (RCU) manages booting and transitions between each regulation functions.

Key Benefits

  • Embedded RCU (Regulator Control Unit) to manage booting and mode transitions and to ensure data integrity
  • Configurable output drive before delivery to fit the application
  • Accessible voltage reference can be used by wake-up circuitry
  • Performances in normal mode: PFM embedded mode allowing high-efficiency at low load
  • High Efficiency (up to 95% peak efficiency)
  • Low Bill-of-Material: fully integrated feedback and active compensation loop to reduce the number of additional external passive components
  • Low Output Ripple
  • Over-temperature/Over-current protected Output

Key Features

Minimum value
Typical value
Maximum value
Input Voltage
- 1.62 V 3.63 V
Output Voltage
- 0.55 V 2.5 V
Output current configuration
- - 1000 mA;100 mA;200 mA;300 mA;400 mA;500 mA -


  • Smart Headset
  • TWS Earpods
  • Smart Speaker
  • Voice Assistant
  • Hearing aids
  • Voice-controlled devices
  • Bluetooth
  • NB-IoT
  • WiFi
  • GNSS
  • Cellular IoT

Key Performances

  • -

Technical information

  • Technology: TSMC 40 LP eFlash