4.5V to 18V Input, 3A Synchronous Step-Down SWIFT™ Converter - TPS54325

TPS54325 (ACTIVE)

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

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Description

The TPS54325 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54325 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 TPS54325 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS54325 also has a proprietary circuit that enables the device to adapt 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 2.0-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 TPS54325 is available in the 14 pin HTSSOP 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: 2.0 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 – 120 mΩ
    (High Side) and 70 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • 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

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

  TPS54325 Compare
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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) 3
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) 4.1
Iq (Typ) (mA) 0.85
Duty Cycle (Max) (%) 90
Soft Start Adjustable
  • Adjustable
  • Fixed
  • None
Compensation Not Needed
  • External
  • Internal
  • Not Needed
Special Features Enable
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$) 0.85 | 1ku
Package Group HTSSOP
  • 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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Other qualified versions of TPS54325

Version Part Number Definition
Automotive TPS54325-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
WEBENCH® TPS54325
    Min   Max   Range  
  Vin V    4.50 – 18.00V  
  Vout V    0.76 – 5.50V  
  Iout A    ≤ 3A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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