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Richtek RT6166 Buck-Boost Converter

Richtek RT6166 Buck-Boost Converter is a high-efficiency, single-inductor, and Advanced Constant On-Time (ACOT®) monolithic synchronous converter. The ACOT control architecture offers excellent outstanding line/load transient response and seamless transition between buck and boost modes. This converter is designed to operate in automatic Pulse Frequency Modulation (PFM) mode and forced Pulse Width Modulation (PWM) mode while maintaining high efficiency. The RT6166 converter is available in a 15-ball WL-CSP package.

The RT6166 converter includes an I2C interface for programmable output voltage, VOUT Dynamic Voltage Scaling (DVS) slew-rate adjustment, ultra-sonic mode control, and device status monitoring. This converter offers up to 95% efficiency at 3.8VIN, 3.3VOUT, and 1A ILOAD. The RT6166 converter is used in applications such as portable devices, tablets, wearable devices, Wi-Fi® modules, smartphones, and system pre-regulators,

Features

  • Automatic seamless mode transition with real buck, buck-boost, and boost operation
  • I2C Interface (up to 1MHz)
  • Default output voltage settings:
    • VOUT = VOUT1 at VSEL = L
    • VOUT = VOUT2 at VSEL = H
  • Maximum continuous output current:
    • Up to 2.5A for VIN ≥ 2.5V, VOUT = 3.3V
    • Up to 3A for VIN ≥ 3V, VOUT = 3.3V
    • Up to 2A for VIN ≥ 3V, VOUT = 5V
  • 2V to 5.5V input voltage range 
  • 1.8V to 4.975V with digitally programmable steps (25mV/steps) output voltage range
  • Up to 95% efficiency (VIN = 3.8V, VOUT = 3.3V,  and ILOAD = 1A)
  • 3μA non-switching low quiescent current
  • Allow DVS Control
  • Automatic PFM Mode and Forced PWM mode selection
  • Ultra-sonic mode operation
  • Over-Current (OCP), Under-Voltage Lockout (UVLO), Over-Temperature Protection (OTP), Over-Voltage Protection (OVP), and Under-Voltage Protection (UVP)
  • 15-ball WL-CSP package

Applications

  • Smartphones and tablets
  • Portable devices
  • Wearable devices
  • System pre-regulators
  • Wi-Fi® modules
  • USB VCONN supplies
  • TWS earbud chargers
  • Point-of-load regulators

Application Circuit Diagram

Application Circuit Diagram - Richtek RT6166 Buck-Boost Converter

Functional Block Diagram

Block Diagram - Richtek RT6166 Buck-Boost Converter
Publié le: 2025-02-27 | Mis à jour le: 2025-03-11