3V to 26V Input, 20A, Eco-Mode™, D-CAP™ Synchronous Buck Controller

3V to 26V Input, 20A, Eco-Mode™, D-CAP™ Synchronous Buck Controller - TPS53119


The TPS53119 device is a small-sized single buck controller with adaptive ON-time D-CAP mode control. The device is designed for low output voltage, high current, PC system power rail and similar point-of-load (POL) power supplies in digital consumer products. The small package and minimal pin count save space on the PCB, while the dedicated EN pin and pre-set frequency selections simplify the power supply design. The skip mode at light load conditions, strong gate drivers, and low-side FET RDS(on) current sensing supports low loss and high efficiency over a broad load range. The conversion input voltage (high-side FET drain voltage) range is between 4.5 V and 25 V, and the output voltage range is between 0.6 V and 5.5 V. The TPS53119 is available in a 16-pin VQFN package specified from –20°C to 85°C.


  • Conversion Input Voltage Range: 3 V to 26 V
  • VDD Input Voltage Range: 4.5 V to 25 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Built-In 0.6-V (±0.8%) Reference
  • Built-In LDO Linear Voltage Regulator
  • Auto-Skip Eco-Mode™ for Light-Load Efficiency
  • D-CAP™ Mode with 100-ns Load-Step Response
  • Adaptive ON-Time Control Architecture with 8 Selectable Frequency Settings
  • 4700-ppm/°C RDS(on) Current Sensing
  • 0.7-ms, 1.4-ms, 2.8-ms and 5.6-ms Selectable Internal Voltage Servo Soft Start
  • Pre-Charged Start-Up Capability
  • Built-In Output Discharge
  • Open-Drain Power-Good Output
  • Integrated Boost Switch
  • Built-In OVP/UVP/OCP
  • Thermal Shutdown (Non-Latch)
  • 3-mm × 3-mm 16-Pin VQFN (RGT) Package

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Parametrics Compare all products in Buck Controller (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
TPS53119 TPS40345
3    3   
26    20   
0.6    0.6   
5.5    18   
20    25   
1    1   
1    1   
250    600   
970    600   
0.4    2.5   
Light Load Efficiency
Power Good
Pre-Bias Start-Up   
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification   
90    90   
-20 to 85    -20 to 85   
D-CAP    Voltage Mode   
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WEBENCH® Designer TPS53119

  Min   Max Range
Vin  V 4.5 to 24.0V
Vout  V 0.6 to 5.5V
Iout  A ≤ 25A
Ambient Temp  °C -20 to 85°C

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