4.5V to 18V Input, 2A Synchronous Step-Down Converter with Eco-Mode™ - TPS54226

TPS54226 (ACTIVE)

4.5V to 18V Input, 2A Synchronous Step-Down Converter with Eco-Mode™

 

Recommended alternative parts

  • TPS54225  -  Looking for a device with non Eco-mode™? Try the TPS54225.
  • TPS54326  -  Looking for a device with more output current? Try the TPS54326.
  • TPS54239E  -  Looking for a device with higher input voltage? Try theTPS54239E.
  • TPS54294  -  Looking for a dual output device? Try theTPS54294.

Description

The TPS54226 is a adaptive on-time D-CAP2™ mode synchronous buck converter. TheTPS54226 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 TPS54226 uses the D-CAP2™ mode control which provides a fast transient response with no external compensation components. The adoptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency Eco-Mode operation at light load for high efficiency. The TPS54226 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 VCC input, and from 2-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54226 is available in the 14 pin HTSSOP or 16 pin QFN package, and 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 VCC Input Voltage Range: 4.5 V to 18 V
  • Wide VIN Input Voltage Range: 2 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FET’s Optimized
    for Lower Duty Cycle Applications
    – 160 mΩ (High Side) and 110 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • Auto-Skip Eco-Mode™ for High Efficiency at Light Load
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • Auto-Skip Mode
  • 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)

Eco-Mode Is a trademark of Texas Instruments
PowerPAD Is a trademark of Texas Instruments

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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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Approx. Price (US$)
TPS54226 TPS54225 TPS54325 TPS54326 TPS54425 TPS54426 TPS54429 TPS54429E TPS54525 TPS54526 TPS54625 TPS54626
4.5    4.5    4.5    4.5    4.5    4.5    7    7    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    0.76    0.76   
5.5    5.5    5.5    5.5    5.5    5.5    5.5    5.5    5.5    5.5    5.5    5.5   
2    2    3    3    4    4    4.5    4.5    5.5    5.5    6.5    6.5   
1    1    1    1    1      1      1      1    1   
700    700    700    700    700    700    700    700    650    650    650    650   
700    700    700    700    700    700    700    700    650    650    650    650   
0.8    0.8    0.85    0.85    0.85    0.85    0.85    0.85    0.9    0.9    0.95    0.95   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Power Good
Synchronous Rectification   
Enable
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Power Good
Synchronous Rectification   
Enable
Light Load Efficiency
Power Good
Synchronous Rectification   
D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2    D-CAP2   
90    90    90    90    90    90    98    98    95    95    95    95   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -20 to 85    -20 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
HTSSOP
QFN   
HTSSOP    HTSSOP    HTSSOP
QFN   
HTSSOP    HTSSOP
QFN   
HTSSOP    HTSSOP
QFN   
HTSSOP    HTSSOP
QFN   
HTSSOP    HTSSOP   
0.65 | 1ku    0.65 | 1ku    0.70 | 1ku    0.70 | 1ku    0.80 | 1ku    0.80 | 1ku    0.80 | 1ku    0.80 | 1ku    1.00 | 1ku    1.00 | 1ku    1.30 | 1ku    1.30 | 1ku   
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WEBENCH® Designer TPS54226

  Min   Max Range
Vin  V 4.5 to 18.0V
Vout  V 0.77 to 5.5V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 85°C


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