TPS5450QDDARQ1
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Texas Instruments TPS5450QDDARQ1

Manufacturer No:
TPS5450QDDARQ1
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC REG BUCK ADJUSTABLE 5A 8SOPWR
Delivery:
Payment:
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Product Introduction

Overview

The TPS5450-Q1, produced by Texas Instruments, is a high-performance, 5-A step-down DC/DC converter designed for automotive and other high-density point-of-load applications. It is part of the SWIFT™ family of DC/DC regulators and features a wide input voltage range of 5.5 V to 36 V, making it versatile for various power systems. The converter integrates a low-resistance, high-side N-channel MOSFET and includes several protection and regulation features to ensure reliable operation.

Key Specifications

ParameterMinTypMaxUnit
Input Voltage Range5.536V
Output Current56A
Switching Frequency400500600kHz
Voltage Reference Accuracy1.2021.2211.239V
Quiescent Current (Shutdown)1850μA
High-Side MOSFET On-Resistance110150230mΩ
Thermal Shutdown Trip Point135162°C
Operating Junction Temperature-40125°C

Key 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 a 110-mΩ integrated MOSFET switch
  • Fixed 500-kHz switching frequency for small filter size
  • Internal compensation minimizes external parts count
  • Improved line regulation and transient response by input voltage feed forward
  • System protected by overcurrent limiting, thermal shutdown, and overvoltage protection
  • Low shutdown supply current of 18 μA (typical)
  • Internal slow-start circuit to limit inrush currents

Applications

  • Automotive systems
  • High-density point-of-load regulators
  • LCD and plasma displays
  • Battery chargers
  • 12-V/24-V distributed power systems

Q & A

  1. What is the input voltage range of the TPS5450-Q1?
    The input voltage range is from 5.5 V to 36 V.
  2. What is the maximum continuous output current of the TPS5450-Q1?
    The maximum continuous output current is 5 A, with a peak current of 6 A.
  3. What is the switching frequency of the TPS5450-Q1?
    The switching frequency is fixed at 500 kHz.
  4. What is the typical quiescent current in shutdown mode?
    The typical quiescent current in shutdown mode is 18 μA.
  5. Does the TPS5450-Q1 have overvoltage protection?
    Yes, it includes an overvoltage protection circuit to minimize voltage overshoot.
  6. What is the thermal shutdown trip point of the TPS5450-Q1?
    The thermal shutdown trip point is between 135°C and 162°C.
  7. How does the internal slow-start circuit function?
    The internal slow-start circuit ramps up the reference voltage from 0 V to its final value linearly to limit inrush currents, with a typical slow-start time of 8 ms.
  8. What type of compensation does the TPS5450-Q1 use?
    The TPS5450-Q1 uses internal compensation to simplify the regulator design, employing a type 3 compensation network.
  9. What is the purpose of the voltage feed-forward circuit?
    The voltage feed-forward circuit provides a constant DC power stage gain despite variations in the input voltage, improving the transient response.
  10. How should the ENA pin be controlled?
    The ENA pin should be controlled using open drain or open collector output logic to enable or disable the regulator.

Product Attributes

Function:Step-Down
Output Configuration:Positive
Topology:Buck
Output Type:Adjustable
Number of Outputs:1
Voltage - Input (Min):5.5V
Voltage - Input (Max):36V
Voltage - Output (Min/Fixed):1.221V
Voltage - Output (Max):32.04V
Current - Output:5A
Frequency - Switching:500kHz
Synchronous Rectifier:No
Operating Temperature:-40°C ~ 125°C (TJ)
Mounting Type:Surface Mount
Package / Case:8-PowerSOIC (0.154", 3.90mm Width)
Supplier Device Package:8-SO PowerPad
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Similar Products

Part Number TPS5450QDDARQ1 TPS54540QDDARQ1 TPS54560QDDARQ1
Manufacturer Texas Instruments Texas Instruments Texas Instruments
Product Status Active Not For New Designs Not For New Designs
Function Step-Down Step-Down Step-Down
Output Configuration Positive Positive Positive
Topology Buck Buck, Split Rail Buck, Split Rail
Output Type Adjustable Adjustable Adjustable
Number of Outputs 1 1 1
Voltage - Input (Min) 5.5V 4.5V 4.5V
Voltage - Input (Max) 36V 42V 60V
Voltage - Output (Min/Fixed) 1.221V 0.8V 0.8V
Voltage - Output (Max) 32.04V 41.1V 58.8V
Current - Output 5A 5A 5A
Frequency - Switching 500kHz 100kHz ~ 2.5MHz 100kHz ~ 2.5MHz
Synchronous Rectifier No No No
Operating Temperature -40°C ~ 125°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ)
Mounting Type Surface Mount Surface Mount Surface Mount
Package / Case 8-PowerSOIC (0.154", 3.90mm Width) 8-PowerSOIC (0.154", 3.90mm Width) 8-PowerSOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SO PowerPad 8-SO PowerPad 8-SO PowerPad

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