TPS56428DDAR

The TPS56428 is a D-CAP2 mode synchronous buck converter which is optimized for various power bus regulation needs with a cost effective, low component count, low standby current solution.

The D-CAP2 mode control provides a fast transient response with no external compensation components. This adaptive on-time control supports seamless transition between PWM mode at higher load conditions and advanced Eco-mode operation at light loads. Advanced Eco-mode™ maintains higher efficiency during lighter load conditions than traditional skip mode.

The TPS56428 also has a proprietary circuit to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18 V VIN input and its output voltage can be programmed between 0.6V and 7.0V. The device also features a fixed 1-ms soft start and a power-good output.

The TPS56428 is available in 8-pin SOIC-8 and 14-pin QFN packages designed to operate over the ambient temperature range of –40°C to 85°C.

主な特長

• D-CAP2™ Mode at 650kHz Switching for Fast
  Transient Response, Ceramic Capacitor Support
• V_IN Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.6 V to 7.0 V
• Advanced Eco-mode for High Light Load
  Efficiency
• Integrated FETs Optimized for Lower Duty Cycle
  – 68 mΩ (High Side) and 37 mΩ (Low Side)
• Shutdown Current Less Than 10 µA
• 1% Initial Reference Voltage Accuracy
• Soft Start with Pre-Bias Output Support
• Cycle By Cycle Over Current Limit
• Power Good Output
• Fixed Soft Start : 1.0ms