The KTB8400 is a precision and unique OptiCompTM 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).
- 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 VIN, 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
- 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) |
| 2.5V | 5.5V | 2.4 | 3.0 |
| Description | Documents | Type |
|---|---|---|
| Datasheet | KTB8400-04a | |
| Technical Article | TA005-04a | |
| Package Outline Drawing | WLCSP35-15 DAA POD |
| Purchase Options |
|---|
| Buy from Digi-Key |
| Buy from Mouser |