4.5V to 14V Input, 25A Synchronous Step-Down SWIFT™ Converter - TPS56221

TPS56221 (ACTIVE)

4.5V to 14V Input, 25A Synchronous Step-Down SWIFT™ Converter

Description

TPS56221 is a high-efficiency and high-current synchronous buck converter designed to operate from a supply between 4.5 V and 14 V. The device is capable of producing an output voltage as low as 0.6 V at loads up to 25 A. Integrated NexFET Power MOSFETs provide a small foot print and ease of use.

The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change.

TPS56221 is available in a thermally enhanced 22-pin PQFN (DQP) PowerPAD package.

The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation. OCP levels are programmed by a single external resistor connected from the ILIM pin to the circuit ground. During the initial power-on sequence, the device enters a calibration cycle, measures the voltage at the ILIM pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. It then enters a shutdown/restart cycle until the fault is removed.

Features

  • 4.5-V to 14-V Input Voltage Range
  • Incorporates Power Block Technology
  • Up to 25-A Output Current
  • Fixed Frequency Options of 300 kHz, 500 kHz and 1 MHz
  • High-Side and Low-Side MOSFET RDS(on) Sensing
  • Programmable Soft-Start
  • 600-mV Reference Voltage with 1% Accuracy
  • Voltage Mode Control with Feed-Forward
  • Supports Pre-Biased Output
  • Thermal Shutdown
  • 22-Pin 5 mm x 6 mm PQFN PowerPAD Package

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Parametrics Evaluate all products in Step-Down (Buck) Converter

  TPS56221 Compare
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Regulated Outputs (#) 1
Vin (Min) (V) 4.5
Vin (Max) (V) 14
Vout (Min) (V) 0.6
Vout (Max) (V) 12
Iout (Max) (A) 25
Iout2 (Max) (A) -
Vout2 (Min) (V) -
Vout2 (Max) (V) -
Topology Buck
  • Boost
  • Buck
  • Buck-Boost
  • Inverting Buck-Boost
Switching Frequency (Max) (kHz) 1000
Switch Current Limit (Typ) (A) 35
Iq (Typ) (mA) 2.5
Duty Cycle (Max) (%) 93
Soft Start Adjustable
  • Adjustable
  • Fixed
  • None
Compensation External
  • External
  • Internal
  • Not Needed
Special Features Enable
Light Load Efficiency
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 Voltage Mode
  • 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 125 °C to °C
Approx. Price (US$) 3.75 | 1ku
Package Group LSON-CLIP
  • 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® TPS56221
    Min   Max   Range  
  Vin V    4.50 – 14.00V  
  Vout V    0.60 – 12.00V  
  Iout A    ≤ 25A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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