2.95V to 6V Input, 3A Synchronous Step-Down Converter - TPS5432


2.95V to 6V Input, 3A Synchronous Step-Down Converter

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The TPS5432 is a 6V, 3A, low Iq, current mode, synchronous monolithic buck converter with integrated MOSFETs. The TPS5432 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by 700kHz switching frequency. SOIC-8 package with exposed thermal pad provides both thermally enhanced solution and easy to use.

The TPS5432 provides accurate regulation for a variety of loads with an accurate 3.0% voltage reference over temperature.

Efficiency is maximized through the integrated 70mΩ MOSFETs and 360μA typical supply current. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode.

The output voltage startup ramp is controlled by the slow start pin. A ceramic capacitor at this pin can easily adjust the slow start time.

Frequency fold back and thermal shutdown protects the device during an over-current condition.


  • Two 70mΩ (typical) MOSFETs for 3A Continuous Output Current
  • Current Mode Control With External Compensation
  • 700kHz Switching Frequency
  • 360µA no Load Quiescent Operating Current (no switching)
  • 0.808V Internal Voltage Reference
  • ±2.0% Reference Accuracy at 25°C
  • ±3.0% Reference Accuracy Over Temperature Range –40°C~125°C
  • Stable Operation With Ceramic Output Capacitor
  • Adjustable Slow Start
  • Cycle by Cycle Current Limit, and Frequency Fold Back Protection
  • Thermally Enhanced 8-Pin SOIC (DDA) Package

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

  TPS5432 Compare
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Regulated Outputs (#) 1
Vin (Min) (V) 2.95
Vin (Max) (V) 6
Vout (Min) (V) 0.808
Vout (Max) (V) 4.5
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) 5.7
Iq (Typ) (mA) 0.36
Duty Cycle (Max) (%) 98
Soft Start Adjustable
  • Adjustable
  • Fixed
  • None
Compensation External
  • External
  • Internal
  • Not Needed
Special Features Enable
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 Current 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) (%) 2
Rating Catalog
  • Automotive
  • Catalog
  • HiRel Enhanced Product
  • High Temp
  • Military
  • Space
Operating Temperature Range (C) -40 to 125 °C to °C
Approx. Price (US$) 1.00 | 1ku
Package Group SO PowerPAD
  • CFP
  • DDPAK/TO-263
  • MSOP-PowerPAD
  • PDIP
  • QFN
  • SO PowerPAD
  • SOIC
  • SON
  • SOT
  • SOT-23
  • TO-220
  • TO-263
  • USON
  • VQFN
  • VSON
  • WQFN
  • WSON
  Sample & Buy Reset Update

So what do you think? Leave a comment about this table...

    Min   Max   Range  
  Vin V    2.95 – 6.00V  
  Vout V    0.81 – 5.50V  
  Iout A    ≤ 3A  
  Ambient Temp °C    -40 – 150°C  
Footprint BOM Cost Efficiency
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