The TPS54426 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54426 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54426 uses the D-CAP2™ mode control which provides a very fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54426 to maintain high efficiency during lighter load conditions. The TPS54426 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP, SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable soft start time and a power good function. The TPS54426 is available in the 14-pin HTSSOP package and the 16 pin QFN package, designed to operate from –40°C to 85°C.
● D-CAP2™ Mode Enables Fast Transient Response
● Low Output Ripple and Allows Ceramic Output Capacitor
● Wide VIN Input Voltage Range: 4.5 V to 18 V
● Output Voltage Range: 0.76 V to 5.5 V
● Highly Efficient Integrated FET’s Optimized
●for Lower Duty Cycle Applications
●– 65 mΩ (High Side) and 55 mΩ (Low Side)
● High Efficiency, less than 10 µA at shutdown
● High Initial Bandgap Reference Accuracy
● Adjustable Soft Start
● Pre-Biased Soft Start
● 700-kHz Switching Frequency (fSW)
● Cycle By Cycle Over Current Limit
● Power Good Output
● Auto-Skip Eco-mode for High Efficiency at Light Load
● APPLICATIONS
● Wide Range of Applications for Low Voltage System
● Digital TV Power Supply
● High Definition Blu-ray Disc Players
● Networking Home Terminal
● Digital Set Top Box (STB)
