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


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 Range: 3 V to 28 V
  • VDD Input Voltage Range: 4.5 V to 28 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Supports All Ceramic Output Capacitors
  • Reference Voltage: 600 mV ±0.5% Tolerance
  • ±9% Voltage Adjustment via 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 via PMBus
  • Supports Voltage Margining via PMBus
  • Programmable Soft-Start Time via PMBus
  • Programmable Power-On Delay via PMBus
  • Programmable VDD UVLO Level via PMBus
  • Fault Report via 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

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Parametrics Compare all products in Buck controllers (external switch)

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)
Duty cycle (Max) (%)
Operating temperature range (C)
Package Group
Control mode
TPS53819A TPS53219A
3     3    
28     28    
0.6     0.6    
5.5     5.5    
40     20    
1     1    
1     1    
275     250    
1000     970    
0.92     0.4    
Dynamic Voltage Scaling
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Light Load Efficiency
Power Good
Pre-Bias Start-Up    
90     90    
-40 to 85     -40 to 85    
Catalog     Catalog    
VQFN | 16     VQFN | 16    
Controller     Controller    
D-CAP2     D-CAP    

Design tool

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WEBENCH® Designer TPS53819A

  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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