Features

• 2.7 to 5.5V Input Voltage Range

• 0.6 to 3.345V Programmable Output Voltage

 6.25mV steps below 1.39375V

 15mV steps above 1.44V

• 3.0A Output Current

• ±1% Accuracy at TA = +25°C

 ±2.5% over line/load/temp/setting

• Fast Transient Response

• Dynamic Voltage Scaling (DVS) with 8 ramp rates

• Soft-Start with 10 ramp rates

• 89% Peak Efficiency at Vout = 1.15625V

• 2.4MHz with Auto-Skip at light loads

 Programmable forced-PWM mode

• 48uA typ. No-Load Supply Current in Skip Mode

• Tiny External Components

 L = 330 or 470nH (2012 or 2016 metric size)

 Cin = 10μF (0402), Cout = 2x22μF (2x0402)

• Over-Current, Short-Circuit, Under/Over-VIN, and

Thermal Shutdown Protections

• 1MHz I2C Interface

• Open-Drain ̅I̅R̅̅Q̅̅ Output Flag

• -40°C to 85°C Operating Temperature Range

• 15-bump Pb-free WLCSP (0.4mm pitch)

 1.340 x 2.045mm (0.6mm height)

 Pin/Register Compatible with FAN53526

Brief Description

The KTB8331 is a precision adaptive-on-time (AOT)

buck switching regulator with class-leading accuracy,

transient response, efficiency, and solution size

optimized for mobile and non-mobile application. It is

I2C programmable for output voltages in the 0.6V to

3.345V range. It features soft-start and DVS with

multiple programmable ramp rates. Versions with

various default settings can be ordered. The features

and performance make the KTB8331 suitable for a

variety of applications including CPU/GPU core, DSP

and baseband, DDR memory, VIO, and sensor/analog

power.

The KTB8331 is available in RoHS and Green

compliant 15-bump 1.340mm x 2.045mm x 0.6mm

wafer-level chip-scale package (WLCSP).

Applications

• CPU, GPU, AP, DSP, FPGA, I/O, XCVR Power

• HDD, LPDDR3, LPDDR4 Memory Power

• Tablets, Netbooks, Ultra-Books

• Smartphones, Mobile Internet Devices, IoT

• DSC, Drones, Gaming Consoles, Accessories