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TPS55165QPWPRQ1

TITPS55165QPWPRQ1

Texas Instruments
Buck-Boost Switching Regulator IC Positive Fixed 5V, 12V 1 Output 1A 20-PowerTSSOP (0.173", 4.40mm Width)
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Overview

The TPS55165QPWPRQ1 is an automotive-qualified, synchronous buck-boost DC-DC converter designed to provide a stable 5V output from a wide input voltage range of 2V to 36V. It features an integrated power-latch function and an ignition (IGN) wake-up input, making it ideal for systems that must remain operational during automotive cranking or start-stop events. The device transitions automatically between step-down and step-up modes to maintain regulation across varying battery conditions.

Why Choose This Part

The regulator excels in efficiency and EMI performance by utilizing a 2MHz switching frequency and integrated spread-spectrum technology. Its ability to operate down to 2V after startup ensures system reliability during extreme cold-crank scenarios. Additionally, the low 3uA shutdown current and small 20-PowerTSSOP footprint simplify thermal management and board space constraints in dense automotive modules.

Applications

Automotive ECU Power Supply
Provides a steady 5V rail for microcontrollers and sensors despite large voltage swings during engine cranking or load dump conditions.
Start-Stop Systems
Maintains output regulation when the battery voltage drops significantly as the engine restarts.
Functional Safety Systems
Utilizes its functional safety-capable status and smart power-good output to support ASIL-rated system requirements.
Always-On Telematics
Leverages the 15uA quiescent current and IGN wake-up pin to minimize battery drain in parked vehicles.

Key Specifications

Function Step-Up/Step-Down
Topology Buck-Boost
Output Type Fixed
Mounting Type Surface Mount
Package / Case 20-PowerTSSOP (0.173", 4.40mm Width)
Current - Output 1A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 2MHz
Operating Temperature -40degC ~ 125degC (TA)
Synchronous Rectifier Yes
Voltage - Input (Max) 36V
Voltage - Input (Min) 3.6V
Supplier Device Package 20-HTSSOP
Voltage - Output (Min/Fixed) 5V, 12V

Getting Started

Designers should utilize the TPS55165-Q1-EVM evaluation module to validate thermal performance and transition behavior under load. Ensure the thermal pad is soldered to a large ground plane to manage heat dissipation at the 1A maximum output current. Use high-quality X7R ceramic capacitors and shielded inductors to maintain the low-EMI profile required for automotive EMC compliance.