TPS54418 (ACTIVE)

2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter

2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter - TPS54418
 

Recommended alternative parts

  • TPS54478  -  2.95 to 6V, 4A with Pre-biased Start up and Hiccup Current Limit
  • TPS57114-Q1  -  TPS57114-Q1 is an automotive qualified 6V, 4A converter

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 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 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 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 TPS54418 With the WEBENCH® Power Designer

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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)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS54418 TPS54318 TPS54319 TPS54478 TPS54519 TPS54618 TPS54678 TPS54719
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    0.6    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    3    3    4    5    6    6    7   
1    1    1    1    1    1    1    1   
200    200    300    200    200    200    200    200   
2000    2000    2000    2000    2000    2000    2000    2000   
0.35    0.35    0.36    0.035    0.455    0.25    0.25    0.455   
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
Synchronous Rectification
Tracking   
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking
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   
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
Tracking   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
98    98    98    98    100    98    98    100   
-40 to 150    -40 to 150    -40 to 150    -40 to 150    -40 to 140    -40 to 150    -40 to 150
to   
-40 to 140   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
WQFN    WQFN    WQFN    WQFN    WQFN    WQFN    WQFN    WQFN   
New! Interactive Design
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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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