TPS5450 5.5V to 36V Input, 5A, 500kHz Step Down Converter | TI.com

TPS5450
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5.5V to 36V Input, 5A, 500kHz Step Down Converter

 

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Description

The TPS5450 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 are 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 TPS5450 feedback loop is internally compensated.

The TPS5450 device is available in a thermally-enhanced, 8-pin SOIC PowerPAD package. TI provides evaluation modules and software tool to aid in 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 5-A Continuous (6-A Peak) Output Current
  • High Efficiency Greater Than 90% 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 Part Count
  • Fixed 500-kHz Switching Frequency for Small Filter Size
  • 18-µA Shutdown Supply Current
  • Improved Line Regulation and Transient Response by Input
    Voltage Feed Forward
  • System Protected by Overcurrent Limiting, Overvoltage
    Protection and Thermal Shutdown
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD™
    Package

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WEBENCH® Designer TPS5450

  Min   Max Range
Vin  V 5.5 to 36.0V
Vout  V 1.23 to 31V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS5450 Order now 5.5     36     1.22     31     5     1     500     500     3     Enable
Over Current Protection    
Voltage Mode     89     -40 to 125     Catalog     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)