Description

The KTB8400 is a precision and unique OptiComp^TM 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 KTB8400 suitable for a variety of applications including CPU/GPU core, DSP and baseband, DDR memory, VIO, and sensor/analog power.

The KTB8400 is available in RoHS and Green compliant 15-bump 1.340mm x 2.045mm x 0.6mm wafer-level chip-scale package (WLCSP).

Features

• 2.5 to 5.5V Input Voltage Range
• Fixed Output Voltage = 1.3V
• 0.6 to 3.345V Programmable Option for Vout
  • 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
• Fast PLL Loop with accurate Switching frequency over load changes
• Dynamic Voltage Scaling (DVS) with 8 ramp rates
• 90% Peak Efficiency at Vout = 1.136V
• 2.4MHz with Auto-Skip at light loads
  • Programmable forced-PWM mode
• 46uA typ. No-Load Supply Current in Skip Mode
• Tiny External Components
  • L = 330 or 470nH (2012 or 2016 metric size)
  • Cin = 10µF (0402), Cout = 2×22µF (2×0402)
• Soft Start, Over-Current, Short-Circuit, Under/Over V_IN, and Thermal Shutdown Protections
• 1MHz I²C Interface
• -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 FAN53527

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

Packaging Information

Parameters

Technical Documentation

Purchase