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

TPS54226 (ACTIVE)

4.5V to 18V Input, 2A Synchronous Step-Down SWIFT™ 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 Evaluate all products in Step-Down (Buck) Converter

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Regulated Outputs (#) 1
Vin (Min) (V) 4.5
Vin (Max) (V) 18
Vout (Min) (V) 0.76
Vout (Max) (V) 5.5
Iout (Max) (A) 2
Iout2 (Max) (A) -
Vout2 (Min) (V) -
Vout2 (Max) (V) -
Topology Buck
  • Boost
  • Buck
  • Buck-Boost
  • Inverting Buck-Boost
Switching Frequency (Max) (kHz) 700
Switch Current Limit (Typ) (A) 3.1
Iq (Typ) (mA) 0.8
Duty Cycle (Max) (%) 90
Soft Start Adjustable
  • Adjustable
  • Fixed
  • None
Compensation Not Needed
  • External
  • Internal
  • Not Needed
Special Features Enable
Light Load Efficiency
Power Good
Synchronous Rectification
  • Adjustable Current Limit
  • Adjustable UVLO
  • Dynamic Voltage Scaling
  • Enable
  • Frequency Synchronization
  • Light Load Efficiency
  • Phase Interleaving
  • Power Good
  • Synchronous Rectification
  • Tracking
Control Mode D-CAP2
  • COT with emulated ripple
  • Constant on-time (COT)
  • Current Mode
  • D-CAP
  • D-CAP+
  • D-CAP2
  • D-CAP3
  • Voltage Mode
Preset Vout (V) -
Vref Accuracy (Typ) (%) 1
Rating Catalog
  • Automotive
  • Catalog
  • HiRel Enhanced Product
  • High Temp
  • Military
  • Space
Operating Temperature Range (C) -40 to 85 °C to °C
Approx. Price (US$) 0.75 | 1ku
Package Group HTSSOP
QFN
  • CFP
  • DDPAK/TO-263
  • DSBGA
  • DSLGA
  • HTSSOP
  • LQFN-CLIP
  • LSON-CLIP
  • MSOP-PowerPAD
  • PDIP
  • QFN
  • SO PowerPAD
  • SOIC
  • SON
  • SOT
  • SOT-23
  • TO-220
  • TO-263
  • TSSOP
  • USON
  • VQFN
  • VQFN-CLIP
  • VSON
  • VSSOP
  • WQFN
  • WSON
  • XCEPT
  Sample & Buy Reset Update

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WEBENCH® TPS54226
    Min   Max   Range  
  Vin V    4.50 – 18.00V  
  Vout V    0.76 – 5.50V  
  Iout A    ≤ 2A  
  Ambient Temp °C    ≤ 100°C  
Footprint BOM Cost Efficiency
 
 
 
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