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).
- 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
- <30mV droop for 10mA to 1.4A step (tr = 100ns @ FPWM)
- Dynamic Voltage Scaling (DVS) with 8 ramp rates
- Soft-Start with 10 ramp rates
- 89% Efficiency (at Vin = 3.6V, Vout = 1.15625V)
- 2.4MHz with Auto-Skip at light loads
- Programmable forced-PWM mode
- 48µA typ. No-Load Supply Current
- Tiny External Components
- L = 330 or 470nH (2012 or 2016 metric size)
- Cin = 10µF (0402), Cout = 2×22µF (2×0402)
- Over-Current, Short-Circuit, Under/Over-VIN, and Thermal Shutdown Protections
- 1MHz I2C Interface
- Open-Drain Output Flag
- -40°C to 85°C Operating Temperature Range
- 15-bump Pb-free WLCSP (0.4mm pitch)
- 1.310 x 2.015mm (0.6mm height)
- 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
| Package |
Dimensions |
Package Code |
| WLCSP35-15 |
1.340mm x 2.045mm x 0.620mm |
DAA |
| Vin (min) |
Vin (max) |
Switching Frequency (MHz) |
Max Current (A) |
| 2.7V |
5.5V |
2.4 |
3.0 |