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4.5V to 18V Input, 2A Synchronous Step-Down Converter


Package | PIN: DDA | 8
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $1.56
10-24 $1.40
25-99 $1.30
100-249 $1.13
250-499 $1.05
500-749 $0.88
750-999 $0.72
1000+ $0.66


  • D-CAP2™ Mode Enables Fast Transient
  • Low Output Ripple and Allows Ceramic Output
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7 V
  • Highly-Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    • 155 mΩ (High-Side) and 108 mΩ (Low-Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft-Start
  • Prebiased Soft-Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent Limit

Texas Instruments  TPS54227DDA

The TPS54227 device is an adaptive ON-time D-CAP2 mode synchronous buck converter. The TPS54227 enables system designers to complete the bus regulators for a suite of various end equipment with a cost-effective, low component count, low standby current solution. The main control loop for the TPS54227 uses the D-CAP2 mode control which provides a fast transient response with no external compensation components. The TPS54227 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 TPS54227 is available in the 8-pin HSOP package and 10-pin VSON, and is designed to operate from –40°C to 85°C.