TPS54225PWPR Power Path Management IC Switching Voltage Regulators 4.5-18V 2A Sync Step Down Converter

FEATURES
• D-CAP2TM Mode Enables Fast Transient

• Low Output Ripple and Allows Ceramic Output Capacitor

• Wide VCC Input Voltage Range: 4.5 V to 18 V

• Wide VIN Input Voltage Range: 2 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
  - 160 mΩ (High Side) and 110 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 Overcurrent Limit

• Power Good Output

   

APPLICATIONS

• Wide Range of Applications for Low Voltage System

• – Digital TV Power Supply

• – High Definition Blu-ray DiscTM Players

• – Networking Home Terminal

• – Digital Set Top Box (STB) space

DESCRIPTION

The TPS54225 is an adaptive on-time D-CAP2TM mode synchronous buck converter. The TPS54225 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 TPS54225 uses the D-CAP2TM mode control which provides a fast transient response with no external compensation components.

The TPS54225 also has a proprietary circuit that enables the device to adapt 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 VCC input , and from 2-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54225 is available in the 14 pin HTSSOP package, and designed to operate from –40°C to 85°C.