TPS54318 2.95V to 6V Input, 3A Synchronous Step-Down SWIFT™ Converter | TI.com

TPS54318 (ACTIVE) 2.95V to 6V Input, 3A Synchronous Step-Down SWIFT™ Converter

 

Description

TheTPS54318 device is a full-featured, 6-V, 3-A, synchronous, step-down current-mode converter with two integrated MOSFETs.

The TPS54318 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 TPS54318 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 EN 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 foldback and thermal shutdown protects the device during an overcurrent condition.

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

Features

  • Two, 30-mΩ (typical) MOSFETs for High-Efficiency at 3-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 Prebiased Output
  • Cycle-by-Cycle Current Limit, Thermal and Frequency Foldback Protection
  • Operating Junction Temperature Range: –40°C to 150°C
  • Thermally Enhanced 3 mm × 3 mm 16-pin WQFN Package
  • Create a Custom Design Using the TPS54318 With the WEBENCH® Power Designer

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WEBENCH® Designer TPS54318

  Min   Max Range
Vin  V 2.95 to 6.0V
Vout  V 0.8 to 6V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 140°C

Parametrics

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Part number Order 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) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS54318 Order now 2.95     6     0.8     4.5     3     1     200     2000     0.35     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
TPS54218 Order now 2.95     6     0.8     4.5     2     1     200     2000     0.35     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
TPS54478 Order now 2.95     6     0.6     4.5     4     1     200     2000     0.525     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
TPS54678 Order now 2.95     6     0.6     4.5     6     1     200     2000     0.57     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 125
-40 to 150    
Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)