General Description

The RT6160D is a high-efficiency, single inductor, Advanced Constant On-Time (ACOT®) monolithicsynchronous 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 outstandingline/load transient response, seamless transition between buck and boost modes, provides stable operation with small ceramic output capacitors and without complicated external compensation.

The RT6160D features I2C interface, which allowsprogrammable 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 RT6160D operates in automatic PFM and typical 2A 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 0.1A, excellent in reducing power consumption. PFM mode can be disabled if fixed frequency is desired. The RT6160D is available in a small WL-CSP-15B 1.4x2.3 (BSC) package.

Features

⚫Automatic Seamless Mode Transition with RealBuck, Buck-Boost and Boost Operation

⚫Input Voltage Range: 2.2V to 5.5V

⚫Output Voltage Range: 2.025V to 5.2V withDigitally Programmable (25mV/steps)

⚫Default Output Voltage Setting:

VOUT = 3.85V at VSEL = L

VOUT = 3.45V 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

⚫Up to 95 Efficiency (VIN = 3.8V, VOUT = 3.3V,ILOAD = 1A)

⚫1A Non-Switching Low Quiescent Current

⚫I2C Interface (Up to 1MHz)

⚫Allows Dynamically-Voltage-Scaling Control

⚫Automatic PFM Mode and Forced PWM ModeSelection

⚫Ultra-Sonic Mode Operation

⚫OCP, UVLO, OTP, OVP, UVP Protected Functionfor Robustness

⚫15-Ball WL-CSP Package

Applications

⚫Smartphones and Tablets

⚫Portable Devices

⚫Wearable Devices

⚫System Pre-Regulators

⚫Point-of-Load Regulators

⚫Wifi Module

⚫USB VCONN Supplies

⚫TWS Earbud Chargers