5.5V to 36V Input, 2A, 500kHz Step-Down Converter - TPS5420

TPS5420 (ACTIVE)

5.5V to 36V Input, 2A, 500kHz Step-Down Converter

Recommended alternative parts

  • TPS5410  -  1A pin compatible version of the TPS5420
  • TPS5430  -  3A pin compatible version of the TPS5430
  • TPS40200  -  4.5 to 52V DC/DC controller requiring external MOSFET

Description

The TPS5420 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features is a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS5420 feedback loop is internally compensated.

The TPS5420 device is available in an easy to use 8-pin SOIC package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

Features

  • Wide Input Voltage Range: 5.5 V to 36 V
  • Up to 2-A Continuous (3-A Peak) Output Current
  • High Efficiency up to 95% Enabled by
    110-mΩ Integrated MOSFET Switch
  • Wide Output Voltage Range: Adjustable Down to 1.22 V
    with 1.5% Initial Accuracy
  • Internal Compensation Minimizes External Parts Count
  • Fixed 500-kHz Switching Frequency for Small Filter Size
  • Improved Line Regulation and Transient Response by
    Input Voltage Feed Forward
  • System Protected by Over Current Limiting, Over Voltage
    Protection and Thermal
    Shutdown
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Available in Small 8-Pin SOIC Package

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

  TPS5420 Compare
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Regulated Outputs (#) 1
Vin (Min) (V) 5.5
Vin (Max) (V) 36
Vout (Min) (V) 1.23
Vout (Max) (V) 31
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) 500
Switch Current Limit (Typ) (A) 3
Iq (Typ) (mA) 3
Duty Cycle (Max) (%) 87
Soft Start Fixed
  • Adjustable
  • Fixed
  • None
Compensation Internal
  • External
  • Internal
  • Not Needed
Special Features Enable
  • 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) (%) 1.5
Rating Catalog
  • Automotive
  • Catalog
  • HiRel Enhanced Product
  • High Temp
  • Military
  • Space
Operating Temperature Range (C) -40 to 125 °C to °C
Approx. Price (US$) 1.70 | 1ku
Package Group SOIC
  • 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 TPS5420

Version Part Number Definition
Enhanced Product TPS5420-EP Supports Defense, Aerospace and Medical Applications
Automotive TPS5420-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

Featured tools and software

WEBENCH® TPS5420
    Min   Max   Range  
  Vin V    5.50 – 36.00V  
  Vout V    1.23 – 31.00V  
  Iout A    ≤ 2.00A  
  Ambient Temp °C    ≤ 100°C  
Footprint BOM Cost Efficiency
 
 
 
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