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