LM51551QUDSSRQ1

$1.96

Description：2.2-MHZ WIDE VIN 1.5-A MOSFET D
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:6e9f7d408574 Category: DC DC Switching Controllers Brand: Texas Instruments

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Product introduction

LM51551QUDSSRQ1 is listed in the DC DC Switching Controllers range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is 2.2-MHZ WIDE VIN 1.5-A MOSFET D. Review the specifications below when checking this part for your BOM.

DC DC Switching Controllers specifications for LM51551QUDSSRQ1

Description：2.2-MHZ WIDE VIN 1.5-A MOSFET D
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)
Output Type：Transistor Driver
Function：Step-Up, Step-Up/Step-Down
Output Configuration：Positive
Topology：Boost, Flyback, SEPIC
Number of Outputs：1
Output Phases：1
Voltage - Supply (Vcc/Vdd)：2.97V ~ 16V, 3.5V ~ 45V
Frequency - Switching：100kHz ~ 2.2MHz
Duty Cycle (Max)：93%
Synchronous Rectifier：No
Clock Sync：Yes
Serial Interfaces：-
Control Features：Soft Start
Operating Temperature：-40°C ~ 125°C (TA)
Mounting Type：Surface Mount
Package / Case：12-WFDFN Exposed Pad
Supplier Device Package：12-WSON (3x2)
Grade：Automotive
Qualification：AEC-Q100

DC DC Switching Controllers datasheet and documents for LM51551QUDSSRQ1

LM51551QUDSSRQ1

DC DC Switching Controllers Overview

The LM51551QUDSSRQ1 is a non-synchronous boost controller from Texas Instruments designed for automotive applications. It supports Boost, SEPIC, and Flyback topologies with an input voltage range of 3.5 V to 45 V. The device features a fixed switching frequency of 2.2 MHz and delivers up to 2 A output current. It operates within a temperature range of -40°C to +125°C and holds AEC-Q100 qualification. The component utilizes peak current mode control and includes integrated protection features such as overcurrent protection and adjustable soft start.

DC DC Switching Controllers Feature Summary

Supports multiple power conversion topologies including Boost, SEPIC, and Flyback configurations
Integrated peak current mode control architecture for precise regulation
AEC-Q100 qualified for reliable operation in automotive environments
Includes comprehensive protection mechanisms such as overcurrent protection and adjustable soft start

DC DC Switching Controllers Applications

Automotive power supply systems requiring wide input voltage ranges
Battery-powered electronic devices utilizing single-cell startup capabilities
Industrial control units needing isolated or non-isolated DC-DC conversion
General-purpose power management modules in harsh thermal environments

DC DC Switching Controllers Procurement Notes

Verify the specific suffix codes against official Texas Instruments documentation to ensure correct package type and temperature rating. Confirm that the ordered part matches the required AEC-Q100 automotive grade specifications. Check for any recent product change notices regarding manufacturing sites or material compliance updates before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller when designing circuits requiring flexible topology support beyond standard boost applications. Consider the external MOSFET requirement due to its non-synchronous nature. Evaluate the 2.2 MHz switching frequency against electromagnetic interference constraints and passive component sizing requirements for the target application.

DC DC Switching Controllers Part Context

This component belongs to the LM5155 family of wide VIN controllers. It shares architectural similarities with other automotive-grade power management ICs from Texas Instruments but distinguishes itself through its multi-topology capability. The QDSSRQ1 designation indicates a specific automotive-grade variant with a WSON-12 package optimized for surface-mount assembly.