ChongMing Group (HK) Int'l Co., Ltd
CHONGMING GROUP (HK) INT'L CO., LTD.
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TPS54229DDAR Power Path Management IC Switching Voltage Regulators 4.5-18Vin,2A Sync Step-Down Converter
FEATURES
• D-CAP2TM Mode Enables Fast Transient
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 7.0 V
Highly Efficient Integrated FETs 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
650-kHz Switching Frequency (fSW)
Cycle By Cycle Over Current Limit
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)
DESCRIPTION
The TPS54229 is an adaptive on-time D-CAP2TM mode synchronous buck converter. TheTPS54229 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 TPS54229 uses the D-CAP2TM mode control which provides a fast transient response with no external compensation components. The TPS54229 also has a proprietary circuit that enables the device 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. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. The TPS54229 is available in the 8-pin DDA package, and designed to operate from –40°C to 85°C.