TPS54218 2.95V to 6V Input, 2A Synchronous Step-Down SWIFT™ Converter | TI.com

TPS54218 (ACTIVE)

2.95V to 6V Input, 2A Synchronous Step-Down SWIFT™ Converter

 

Recommended alternative parts

  • LMZ30602  -  LMZ30602 is a power module option with an integrated inductor
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Description

TheTPS54218 device is a full-featured, 6-V, 2-A, synchronous, step-down current-mode converter with two integrated MOSFETs.

The TPS54218 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 TPS54218 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 2-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 TPS54218 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (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)
Features
Control mode
Duty cycle (Max) (%)
Operating temperature range (C)
Rating
Package Group
Type
Package size: mm2:W x L (PKG)
TPS54218 TPS54318 TPS54478 TPS54678
2.95     2.95     2.95     2.95    
6     6     6     6    
0.8     0.8     0.6     0.6    
4.5     4.5     4.5     4.5    
2     3     4     6    
1     1     1     1    
200     200     200     200    
2000     2000     2000     2000    
0.35     0.35     0.035     0.25    
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable    
Current Mode     Current Mode     Current Mode     Current Mode    
98     98     98     98    
-40 to 150     -40 to 150     -40 to 150     -40 to 125
-40 to 150    
Catalog     Catalog     Catalog     Catalog    
WQFN | 16     WQFN | 16     WQFN | 16     WQFN | 16    
Converter     Converter     Converter     Converter    
16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    

Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS54218

  Min   Max Range
Vin  V 2.95 to 6.0V
Vout  V 0.8 to 4.5V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 140°C


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