2.95V to 6V Input, 3A Synchronous Step-Down Converter - TPS54319

TPS54319 (ACTIVE)

2.95V to 6V Input, 3A Synchronous Step-Down Converter

Recommended alternative parts

  • TPS54519  -  Looking for a device with more output current? Try the TPS54519.
  • TPS54328  -  Looking for a device with higher input voltage? Try the TPS54328.

Description

The TPS54319 device is a full featured 6 V, 3 A, synchronous step down current mode converter with two integrated MOSFETs.

The TPS54319 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 × 3mm thermally enhanced QFN package.

The TPS54319 provides accurate regulation for a variety of loads with an accurate ±3.0% Voltage Reference (VREF) over temperature.

Efficiency is maximized through the integrated 45m MOSFETs and 360µA 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 over-current condition.

The TPS54319 is supported in the SwitcherPro™ Software Tool at www.ti.com/switcherpro.

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

Features

  • Two 45-m (typical) MOSFETs for High Efficiency at 3-A Loads
  • 300kHz to 2MHz Switching Frequency
  • 0.8 V ± 3.0% Voltage Reference Over Temperature (0°C to 85°C)
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • –40°C to 150°C Operating Junction Temperature Range
  • Thermally Enhanced 3mm × 3mm 16-pin QFN
  • Pin Compatible to TPS54318
  • APPLICATIONS
    • Low-Voltage, High-Density Power Systems
    • Point-of-Load Regulation for Consumer Applications such as Set Top Boxes,
      LCD Displays, CPE Equipment

SWIFT, SwitcherPro are trademarks of Texas Instruments.

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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$)
TPS54319 TPS54218 TPS54318 TPS54418 TPS54478 TPS54519 TPS54618 TPS54719
1     1     1     1     1     1     1     1    
2.95     2.95     2.95     2.95     2.95     2.95     6     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    
3     2     3     4     4     5     6     7    
Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck    
2000     2000     2000     2000     2000     2000     2000     2000    
6.6     2.9     4     5     5     7     9     10.5    
0.36     0.35     0.35     0.35     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
Tracking
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
Adjustable UVLO
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking
Adjustable UVLO
Synchronous Rectification    
Adjustable UVLO
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Power Good
Tracking
Adjustable UVLO
Synchronous Rectification    
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    
3     1     1     1     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    
0.80 | 1ku     1.40 | 1ku     1.90 | 1ku     2.35 | 1ku     2.30 | 1ku     1.50 | 1ku     2.70 | 1ku     2.60 | 1ku    

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