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

TPS54623 (ACTIVE)

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

Description

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.

Features

  • 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)
Iout2 (Max) (A)
Vout2 (Min) (V)
Vout2 (Max) (V)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Brand
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS54623 TPS54622 TPS54821 TPS54620 TPS54020 TPS65276V TPS51363 TPS51362 TPS51367 TPS56920 TPS53318 TPS56C20 TPS56720
1     1     1     1     1     2     1     1     1     1     1     1     1    
4.5     4.5     4.5     4.5     4.5     4.5     3     3     3     4.5     1.5     4.5     4.5    
17     17     17     17     17     18     22     22     22     17     22     17     17    
0.6     0.6     0.6     0.8     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6     0.6    
15     15     15     15     5     15     2     2     2     1.87     5.5     1.87     1.87    
6     6     8     6     10     6     10     10     12     9     8     12     7    
          3.5                  
          0.6                  
          15                  
Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck    
1600     1600     1600     1600     1200     1600     800     800     800     500     1000     500     500    
8     8     11.5     8     15       12     12     16     10     8     13.2     7.8    
0.002     0.002     0.6     0.6     0.6     10     0.56     0.1     0.1     0.92     0.32     0.92     0.92    
98     98     100     98     98     95     87     87     87     80     90     80     80    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
External     External     External     External     External     External     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Power Good
Tracking
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking
Adjustable Current Limit
Phase Interleaving
Light Load Efficiency
Synchronous Rectification    
Adjustable Current Limit
Adjustable UVLO
Dynamic Voltage Scaling
Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
Telemetry    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Voltage Margining    
SWIFT     SWIFT     SWIFT     SWIFT     SWIFT               SWIFT        
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP     D-CAP2     D-CAP2    
1     1     1     1     1     1     1     1     1     1     1     1     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 150     -40 to 150     -40 to 125     -40 to 150     -40 to 150     -40 to 125     -10 to 85     -10 to 85     -10 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
14VQFN     14VQFN     14VQFN     14VQFN     15VQFN     32HTSSOP
36VQFN    
28VQFN-CLIP     28VQFN-CLIP     28VQFN-CLIP     20HTSSOP     22LSON-CLIP     24HTSSOP     20HTSSOP    
3.00 | 1ku     2.50 | 1ku     1.90 | 1ku     2.50 | 1ku     3.10 | 1ku     2.50 | 1ku     2.10 | 1ku     2.30 | 1ku     2.70 | 1ku     2.00 | 1ku     3.05 | 1ku     2.40 | 1ku     1.80 | 1ku    

Related end equipment

  • High Density Distributed Power Systems
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  • Broadband, Networking and Optical Communications Infrastructure

WEBENCH® TPS54623
    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  
Footprint BOM Cost Efficiency
 
   
 
 
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