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

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Performance Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Approx. Price (US$)
TPS54418 TPS54218 TPS54318 TPS54319 TPS54478 TPS54519 TPS54618 TPS54678 TPS54719
2.95     2.95     2.95     2.95     2.95     2.95     2.95     2.95     2.95    
6     6     6     6     6     6     6     6     6    
0.8     0.8     0.8     0.8     0.6     0.6     0.8     0.6     0.6    
4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5    
4     2     3     3     4     5     6     6     7    
1     1     1     1     1     1     1     1     1    
200     200     200     300     300     200     200     280     200    
2000     2000     2000     2000     2000     2000     2000     2000     2000    
0.35     0.35     0.35     0.36     0.035     0.455     0.25     0.25     0.455    
Enable
Frequency Synch
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synch
Power Good
Synchronous Rectification
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Power Good
Synchronous Rectification
Tracking    
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
98     98     98     98     98     100     98     98     100    
-40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150     -40 to 150    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
WQFN     WQFN     WQFN     WQFN     WQFN     WQFN     WQFN     WQFN     WQFN    
2.15 | 1ku     1.40 | 1ku     1.80 | 1ku     0.80 | 1ku     2.20 | 1ku     0.85 | 1ku     2.60 | 1ku     2.75 | 1ku     1.90 | 1ku    
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WEBENCH® Designer 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


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