2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter - TPS54418

TPS54418 (ACTIVE)

2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter

Recommended alternative parts

  • TPS54478  -  2.95 to 6V, 4A with Pre-biased Start up and Hiccup Current Limit

Description

The TPS54418 device is a full featured 6 V, 4 A, synchronous step down current mode converter with two integrated MOSFETs.

The TPS54418 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2 MHz switching frequency, and minimizing the IC footprint with a small 3mm x 3mm thermally enhanced QFN package.

The TPS54418 provides accurate regulation for a variety of loads with an accurate ±1% Voltage Reference (VREF) over temperature.

Efficiency is maximized through the integrated 30mΩ MOSFETs and 350µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode.

Under voltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the slow start pin. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage.

Frequency fold back and thermal shutdown protects the device during an overcurrent condition.

The TPS54418 is supported in the SwitcherProTM Software Tool at www.ti.com/switcherpro.

For more SWIFTTM documentation, see the TI website at www.ti.com/swift.

Features

  • Two 30 mΩ (typical) MOSFETs for high efficiency at 4 A loads
  • 200kHz to 2MHz Switching Frequency
  • 0.8 V ± 1% Voltage Reference Over Temperature
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • Low Operating and Shutdown Quiescent Current
  • Safe Start-up into Pre-Biased Output
  • Cycle by Cycle Current Limit, Thermal and Frequency Fold Back Protection
  • –40°C to 150°C Operating Junction Temperature Range
  • Thermally Enhanced 3mm × 3mm 16-pin QFN
  • APPLICATIONS
    • Low-Voltage, High-Density Power Systems
    • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and
      Microprocessors
    • Broadband, Networking and Optical Communications Infrastructure

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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)
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$)
TPS54418 TPS53316 TPS54678 TPS54618 TPS54618-Q1 TPS54719 TPS54478 TPS53318 TPS53353 TPS53355 TPS54526 TPS54426 TPS53319
1     1     1     1     1     1     1     1     1     1     1     1     1    
2.95     2.9     2.95     2.95     2.95     2.95     2.95     1.5     1.5     1.5     4.5     4.5     1.5    
6     6     6     6     6     6     6     22     15     15     18     18     22    
0.8     0.6     0.6     0.8     0.8     0.6     0.6     0.6     0.6     0.6     0.76     0.76     0.6    
4.5     5.5     4.5     4.5     4.5     4.5     4.5     5.5     5.5     5.5     5.5     5.5     5.5    
4     5     6     6     6     7     4     8     20     30     5.5     4     14    
Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck    
2000     2000     2000     2000     2000     2000     2000     1000     1000     1000     650     700     1000    
5     9     9     9     9     10.5     5     8     28     40     6.9     5.4     22    
0.35     0.32     0.25     0.25     0.25     0.455     0.035     0.32     0.32     0.32     0.9     0.85     0.32    
98     99     98     98     98     100     98     90     90     90     95     90     90    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Fixed    
External     External     External     External     External     External     External     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed    
Enable
Frequency Synchronization
Power Good
Adjustable UVLO
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking
Adjustable UVLO
Synchronous Rectification    
Adjustable UVLO
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking    
Adjustable UVLO
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Power Good
Tracking
Adjustable UVLO
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
SWIFT       SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT    
Current Mode     Voltage Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     D-CAP     D-CAP     D-CAP     D-CAP2     D-CAP2     D-CAP    
1     1     1     1     1     2     1     1     1     1     1     1     1    
Catalog     Catalog     Catalog     Catalog     Automotive     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 150     -40 to 85     -40 to 150     -40 to 150     -40 to 125     -40 to 150     -40 to 150     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
16WQFN     16QFN     16WQFN     16WQFN     16WQFN     16WQFN     16WQFN     22LSON-CLIP     22LSON-CLIP     22LSON-CLIP     14HTSSOP
16QFN    
14HTSSOP
16QFN    
22LSON-CLIP    
2.15 | 1ku     1.99 | 1ku     2.75 | 1ku     2.60 | 1ku     3.04 | 1ku     1.90 | 1ku     2.20 | 1ku     3.05 | 1ku     3.50 | 1ku     3.75 | 1ku     1.22 | 1ku     1.08 | 1ku     3.35 | 1ku    
WEBENCH® TPS54418
    Min   Max   Range  
  Vin V    2.90 – 6.00V  
  Vout V    0.80 – 4.50V  
  Iout A    ≤ 4A  
  Ambient Temp °C    -40 – 150°C  
Footprint BOM Cost Efficiency
 
   
 
 
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