TPS53819A 3V to 28V Input, 40A, Eco-Mode™, D-CAP2™ Synchronous Buck Controller with PMBus™ |

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3V to 28V Input, 40A, Eco-Mode™, D-CAP2™ Synchronous Buck Controller with PMBus™



The TPS53819A device is a small-sized, single buck controller with adaptive on-time D-CAP2 mode control and PMBus. The device is suitable for low output voltage and high current, system power rail, or similar point-of-load (POL) power supply in digital consumer products. Small package with minimal pin-count saves space on the PCB, while the programmability and fault report via PMBus simplify the power supply design. The skip-mode at light-load condition combined with strong gate drivers and low-side FET on-resistance (RDS(on)) current sensing can support low-loss and high efficiency operation, over a broad load range. The conversion input voltage, which is the high-side FET drain voltage, ranges from 3 V to 28 V. The supply voltage (VDD) is from 4.5 V to 28 V. The output voltage ranges from 0.6 V to 5.5 V. The device is available in a 16-pin, QFN package and is specified from –40°C to +85°C.


  • Conversion Input Voltage 3 V to 28 V
  • VDD input voltage 4.5 V to 28 V
  • Output voltage 0.6 V to 5.5 V
  • Supports all ceramic output capacitors
  • Reference voltage: 600 mV ±0.5% tolerance
  • ±9% Voltage adjustment with PMBus™
  • Built-in 5-V LDO
  • D-CAP2™ mode with 100-ns load-step response
  • Auto-skip Eco-mode™ for light-load efficiency
  • Adaptive on-time control architecture with eight selectable frequencies using PMBus
  • Supports voltage margining using PMBus
  • Programmable soft-start time using PMBus
  • Programmable power-on delay using PMBus
  • Programmable VDD UVLO level using PMBus
  • Fault report using PMBus
  • Pre-charged start-up capability
  • Built-In output discharge
  • Power-good output with programmable delay
  • Internal overvoltage, undervoltage, and overcurrent limit protections
  • Thermal shutdown (non-latch)
  • 3 mm × 3 mm, 16-pin, QFN package
  • Create a custom design using the TPS53819A with the WEBENCH® Power Designer

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  Min   Max Range
Vin  V 4.5 to 28.0V
Vout  V 0.6 to 5.5V
Iout  A ≤ 40A
Ambient Temp  °C -40 to 85°C


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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
TPS53819A Order now 3     28     0.6     5.5     40     1     1     275     1000     0.92     Dynamic Voltage Scaling
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
90     -40 to 85     Catalog     VQFN | 16     Controller     D-CAP2    
TPS53219A Order now 3     28     0.6     5.5     20     1     1     250     970     0.4     Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up    
90     -40 to 85     Catalog     VQFN | 16     Controller     D-CAP