The RT6163 is a high-efficiency, single inductor, Advanced Constant On-Time (ACOT®) monolithic synchronous Buck-Boost converter that can deliver up to 3A output current from 2.2V to 5.5V and well regulate to the digitally programmable output voltage from 2.025V to 5.2V, which is suitable for wide input supply range applications, regardless of input voltage is lower, higher than or even equal to the output voltage. The ACOT® control architecture features outstanding line/load transient response, seamless transition between buck and boost modes, provides stable operation with small ceramic output capacitors and without complicated external compensation.

The RT6163 features I2C interface, which allows programmable output voltage, ultra-sonic mode control, soft-start slew-rate adjusted and device status monitoring. The target output voltage can also be switched through external VSEL pin to perform dynamically-voltage-scaling (DVS), and the ramp-up slew-rate and ramp mode of DVS can also be set by setting the related registers.

The RT6163 operates in automatic PFM and typical 2µA low quiescent current design that maintains high efficiency during light load operation. At higher loads, the device automatically switches to a 2.2MHz fixed frequency control, which is easily smoothed-out he switching ripple voltage by small package filtering elements. And the integrated low RDS(ON) power MOSFETs features excellent efficiency during heavy load conditions. In shutdown mode, the supply current is typically 0.1µA, excellent in reducing power consumption. PFM mode can be disabled if fixed frequency is desired. The RT6163 is available in a small WL-CSP-15B 1.4x2.3 (BSC) package.


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Key Spec.
Status Active
Vin (min) (V) 2.2
Vin (max) (V) 5.5
Vout (min) (V) 2.025
Vout (max) (V) 5.2
Iout (max) (A) 3
Current Limit (typ) (A) 5
Freq (typ) (kHz) 2200
Ron_HS (typ) (mOhm) 11
Ron_LS (typ) (mOhm) 22
Iq (typ) (mA) 0.002
Features 100% Duty Cycle;ACOT Control;Adjustable Soft-Start;Enable Input;I2C;Internal Compensation;OCP;OVP;SCP;UVP
Interface I2C
Package Type WL-CSP1.4x2.3-15(BSC)
  • Automatic Seamless Mode Transition with Real Buck, Buck-Boost and Boost Operation
  • Input Voltage Range: 2.2V to 5.5V
  • Output Voltage Range: 2.025V to 5.2V with Digitally Programmable (25mV/steps)
  • Default Output Voltage Setting:
    ► VOUT = 4.65V at VSEL = L
    ► VOUT = 4.65V at VSEL = H
  • Maximum Continuous Output Current:
    ► Up to 2A for VIN ≥ 2.5V, VOUT = 3.3V
    ► Up to 3A for VIN ≥ 3V, VOUT = 3.3V
    ► Up to 2A for VIN ≥ 3V, VOUT = 5V
  • Up to 95% Efficiency (VIN = 3.8V, VOUT = 3.3V, ILOAD = 1A)
  • 1μA Non-Switching Low Quiescent Current
  • I2C Interface (Up to 1MHz)
  • Allows Dynamically-Voltage-Scaling Control
  • Automatic PFM Mode, Forced PWM Mode and Bypass Mode Selection
  • Ultra-Sonic Mode Operation
  • OCP, UVLO, OTP, OVP, UVP Protected Function for Robustness
  • 15-Ball WL-CSP Package
TitleLast UpdateDownload
Low Quiescent, High Efficiency 3A Buck-Boost Converter with I2C Interface2023/08/17