4.5V to 17V Input, 6A Synchronous Step-Down SWIFT Converter with Light Load Efficiency - TPS54623


4.5V to 17V Input, 6A Synchronous Step-Down SWIFT Converter with Light Load Efficiency


The TPS54623 in thermally enhanced 3.5mm x 3.5mm QFN package is a full featured 17V, 6A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor's footprint.

The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.

Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time. The TPS54623 operates at continuous current mode (CCM) at higher load conditions while skipping pulses to boost the efficiency at light loads.


  • Integrated 26mΩ / 19mΩ MOSFETs
  • Split Power Rail: 1.6V to 17V on PVIN
  • 200kHz to 1.6MHz Switching Frequency
  • Light Load Efficient with Pulse Skip
  • Synchronizes to External Clock
  • 0.6V ±1% Voltage Reference Over Temperature
  • Low 2µA Shutdown Quiescent Current
  • Monotonic Start-Up into Pre-biased Outputs
  • –40°C to 150°C Operating Junction Temperature Range
  • Adjustable Slow Start/Power Sequencing
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Adjustable Input Undervoltage Lockout
  • Supported by SwitcherPro™ Software Tool
  • For SWIFT™ Documentation and SwitcherPro™,
    visit http://www.ti.com/swift

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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$)
TPS54623 TPS54320 TPS54620 TPS54622
1     1     1     1    
4.5     4.5     4.5     4.5    
17     17     17     17    
0.6     0.8     0.8     0.6    
15     15     15     15    
6     3     6     6    
Buck     Buck     Buck     Buck    
1600     1200     1600     1600    
8     4.2     8     8    
0.002     0.6     0.6     0.002    
98     98     98     98    
Adjustable     Adjustable     Adjustable     Adjustable    
External     External     External     External    
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification    
Power Good
Frequency Synchronization
Synchronous Rectification    
Frequency Synchronization
Power Good
Synchronous Rectification    
Frequency Synchronization
Power Good
Synchronous Rectification    
Current Mode     Current Mode     Current Mode     Current Mode    
1     1     1     1    
Catalog     Catalog     Catalog     Catalog    
-40 to 150     -40 to 150     -40 to 150     -40 to 150    
14VQFN     14VQFN     14VQFN     14VQFN    
3.00 | 1ku     1.50 | 1ku     2.50 | 1ku     2.50 | 1ku    

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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 15.0V  
  Iout A ≤ 6A  
  Ambient Temp °C -40 to 150°C  
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