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

TheTPS54418 device is a full featured 6-V, 4-A, synchronous, step-down, current mode converter with two integrated MOSFETs.

The TPS54418 device 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 device footprint with a small, 3 mm x 3 mm, thermally enhanced, QFN package.

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

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

Undervoltage 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 soft-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.

Use SwitcherPro power supply design software to create, manage and share custom power supply designs for the TPS54418 by clicking here.

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

For all available packages, see the orderable addendum at the end of the datasheet.

Features

  • Two, 30-mΩ (typical) MOSFETs for High-Efficiency at 4-A loads
  • Switching Frequency: 200 kHz to 2 MHz
  • Voltage Reference Over Temperature: 0.8 V ± 1%
  • Synchronizes to External Clock
  • Adjustable Soft-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
  • Operating Junction Temperature Range: –40°C to 150°C
  • Thermally Enhanced 3 mm × 3 mm 16-pin WQFN Package

View more

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 TPS54218 TPS54318 TPS54319 TPS54478 TPS54519 TPS54618 TPS54719
1     1     1     1     1     1     1     1    
2.95     2.95     2.95     2.95     2.95     2.95     2.95     2.95    
6     6     6     6     6     6     6     6    
0.8     0.8     0.8     0.8     0.6     0.6     0.8     0.6    
4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5    
4     2     3     3     4     5     6     7    
Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck    
2000     2000     2000     2000     2000     2000     2000     2000    
5     2.9     4     6.6     5     7     9     10.5    
0.35     0.35     0.35     0.36     0.035     0.455     0.25     0.455    
98     98     98     98     98     100     98     100    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
External     External     External     External     External     External     External     External    
Enable
Frequency Synchronization
Power Good
Adjustable UVLO
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Adjustable UVLO
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Adjustable UVLO
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking
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    
SWIFT     SWIFT     SWIFT       SWIFT     SWIFT     SWIFT     SWIFT    
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
1     1     1     3     1     2     1     2    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150    
16WQFN     16WQFN     16WQFN     16WQFN     16WQFN     16WQFN     16WQFN     16WQFN    
2.15 | 1ku     1.40 | 1ku     1.80 | 1ku     0.80 | 1ku     2.20 | 1ku     0.85 | 1ku     2.60 | 1ku     1.90 | 1ku    
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.
Loading Data Loading...
WEBENCH® TPS54418
    Min   Max   Range  
  Vin V 2.9 to 6.0V  
  Vout V 0.8 to 4.5V  
  Iout A ≤ 4A  
  Ambient Temp °C -40 to 150°C  
Footprint BOM Cost Efficiency
 
   
Explore Now
What are WEBENCH® tools?
Click Here