4.5V to 18V Input, 3-A Synchronous Step-Down Converter - TPS54327

TPS54327 (ACTIVE)

4.5V to 18V Input, 3-A Synchronous Step-Down Converter

 

Recommended alternative parts

  • TPS54328  -  Looking for a device with Eco-mode™? Try the TPS54328.
  • TPS54427  -  Looking for a device with more output current? Try the TPS54427.
  • TPS54227  -  Looking for a device with less output current? Try the TPS54227.
  • TPS54339  -  Looking for a device with higher input voltage? Try the TPS54339.
  • TPS54394  -  Looking for a device with Power-Good? Try the TPS54394.
  • TPS54325  -  Looking for a device with Power-good? Try the TPS54325.

Description

The TPS54327 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. TheTPS54327 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54327 uses the D-CAP2 mode control which provides a fast transient response with no external compensation components. The TPS54327 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. The TPS54327 is available in the 8-pin DDA package and 10-pin DRC, and is designed to operate from –40°C to 85°C.

Features

  • D-CAP2™ Mode Enables Fast Transient
    Response
  • Low-Output Ripple and Allows Ceramic Output
    Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 100 mΩ (High-Side) and 70 mΩ (Low-Side)
  • High Efficiency, Less Than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Prebiased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent Limit
  • APPLICATIONS
    • Wide Range of Applications for Low Voltage
      System
      • Digital TV Power Supply
      • High Definition Blu-ray Disc™ Players
      • Networking Home Terminal
      • Digital Set Top Box (STB)

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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
TPS54327 TPS54227 TPS54228 TPS54328 TPS54427 TPS54428 TPS54527 TPS54528 TPS54627 TPS54628 TPS56428 TPS56528
4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5   
18    18    18    18    18    18    18    18    18    18    18    18   
0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.76    0.6    0.76   
7    7    7    7    7    7    6    6    5.5    5.5    5.5    5.5   
3    2    2    3    4    4    5    5    6    6    4    5   
1    1    1    1    1    1    1    1    1    1    1    1   
700    700    700    700    650    650    650    650    650    650    650    650   
700    700    700    700    650    650    650    650    650    650    650    650   
0.8    0.8    0.8    0.8    0.95    0.95    0.9    0.9    0.95    0.95    0.25    0.25   
Enable
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
D-CAP2    D-CAP2    D-CAP2    D-CAP2    Current Mode    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2   
90    90    90    90    95    95    85    85    85    85    85    85   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 125    -40 to 125    -40 to 85    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
SO PowerPAD
VSON   
SO PowerPAD
VSON   
SO PowerPAD
SOIC
VSON   
SO PowerPAD
VSON   
SO PowerPAD
VSON   
SO PowerPAD
VSON   
SO PowerPAD    SO PowerPAD    SO PowerPAD    SO PowerPAD    SO PowerPAD
VQFN   
SO PowerPAD   
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WEBENCH® Designer TPS54327

  Min   Max Range
Vin  V 4.5 to 18.0V
Vout  V 0.765 to 7V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 85°C


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