4.5V to 17V Input, 10A Synchronous Step-Down SWIFT™ Converter with Out-of-Phase Synchronization


The TPS54020 is a 10-A, 4.5-V to 17-V input SWIFT converter. The innovative 3.5 mm × 3.5 mm HotRod package optimizes high-density step-down designs. The TPS54020 is a full-featured converter.

High efficiency is achieved through the innovative integration and packaging of the high-side and low-side MOSFETs. The TPS54020 operates at continuous current mode (CCM) at higher load conditions, and transitions to Eco-mode while skipping pulses to boost the efficiency at light loads.

Current limiting on both MOSFETs provides device and system protection. Cycle-by-cycle current limiting in the high-side MOSFET protects for overload situations. Low-side MOSFET zero current detection turns off the low-side MOSFET while operating under light loads. Three selectable current-limit thresholds allow a good fit for various applications. A hiccup or cycle-by-cycle overcurrent protection scheme is also selectable.

Thermal shutdown protection disables switching when die temperature exceeds the thermal shutdown trip point and enables switching after the built-in thermal hysteresis and shutdown hiccup time.

The SS pin controls the output voltage start-up ramp and allows for selectable soft-start times. Power supply sequencing is also available by configuring the enable (EN) and the open-drain power-good (PWRGD) pins.

Two TPS54020 devices may be synchronized 180° out-of-phase by using the SYNC_OUT and CLK pins.


  • Integrated 8-mΩ and 6-mΩ MOSFETs
  • Thermally Enhanced 3.5-mm × 3.5-mm HotRod™
  • Peak Current Mode Control
  • Eco-mode™ Pulse Skip for Higher Efficiency
  • Overcurrent Protection for Both MOSFETs
  • Selectable Overcurrent Protection Schemes
  • Selectable Overcurrent Protection Levels
  • Split Power Rail: 1.6 V to 17 V on PVIN
  • 0.6-V Voltage Reference With ±1% Accuracy
  • 200-kHz to 1.2-MHz Switching Frequency
  • Synchronizes to External Clock
  • Start-Up Into Prebiased Outputs
  • Overtemperature and Overvoltage Protection
  • –40°C to 150°C Operating Junction
    Temperature Range
  • Adjustable Soft-Start and Power Sequencing
  • Power-Good Output Monitor for Undervoltage
    and Overvoltage
  • SYNC_OUT Function Provides Output Clock
    Signal 180° Out-of-Phase
  • Supported by WEBENCH® Software Tool
  • For SWIFT™ Documentation and WEBENCH,

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Parametrics Compare all products in Step-Down (Buck) Converter

Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Special Features
Control Mode
Vref Accuracy (Typ) (%)
Operating Temperature Range (C)
Approx. Price (US$)
TPS54020 TPS53513 TPS53515 TPS53915
1     1     1     1    
4.5     1.5     1.5     1.5    
17     18     18     18    
0.6     0.6     0.6     0.6    
5     5.5     5.5     5.5    
10     8     12     12    
Buck     Buck     Buck     Buck    
1200     1000     1000     1000    
15     9.8        
0.6     1.35     1.35     1.35    
Adjustable     Fixed     Fixed     Adjustable    
External     Not Needed     Not Needed     Not Needed    
Frequency Synchronization
Power Good
Adjustable Current Limit
Phase Interleaving
Light Load Efficiency
Synchronous Rectification    
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Dynamic Voltage Scaling
Light Load Efficiency
Power Good
Synchronous Rectification
Voltage Margining    
Current Mode     D-CAP3     D-CAP3     D-CAP3    
1     0.5     0.5     0.5    
Catalog     Catalog     Catalog     Catalog    
-40 to 150     -40 to 85     -40 to 85     -40 to 85    
15VQFN     28VQFN-CLIP     28VQFN-CLIP     28VQFN-CLIP    
3.10 | 1ku     2.55 | 1ku     2.70 | 1ku     3.00 | 1ku    
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.
    Min   Max   Range  
  Vin V 4.5 to 17.0V  
  Vout V 0.6 to 5.0V  
  Iout A ≤ 10A  
  Ambient Temp °C -40 to 125°C  
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