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LM51551QDSSRQ1 +BOM

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, hiccup mode protection

LM51551QDSSRQ1 Information

Description

The LM51551QDSSRQ1 is an automotive-grade synchronous buck controller IC designed for high-performance power supply applications. It features ultra-low shutdown current, optimized operating current, and support for advanced control techniques and algorithms. The device offers a range of benefits, including programmable switching frequency, synchronized clock option, and dynamic adjustment to optimize performance. Additionally, it has increased thermal shutdown threshold, enhanced error amplifier, precision VCC tracking, and simplified design with few external components. The LM51551QDSSRQ1 is suitable for automotive applications such as infotainment systems, advanced driver-assistance systems (ADAS), and LED lighting due to its high efficiency, wide input voltage range, and compact size.

Features

The LM51551QDSSRQ1 features include:

  • Ultra-low shutdown current for battery conservation
  • Optimized operating current for reduced power consumption
  • Support for advanced control techniques and algorithms
  • Fully programmable switching frequency
  • Synchronized clock option available
  • Dynamically adjusts to optimize performance
  • Increased thermal shutdown threshold
  • Enhanced error amplifier for better regulation
  • Precision VCC tracking ensures stable output
  • Simplified design with few external components
  • Highly integrated architecture minimizes PCB area
  • Easy integration into existing systems and designs
  • Robust design for harsh environments
  • Fault detection and flagging available
  • Self-testing capability to ensure device integrity
  • Internal watchdog timer for reliable operation

Package

The package type of LM51551QDSSRQ1 is WSON-12.

Pinout

The LM51551QDSSRQ1 has a WSON-12 package with 12 pins.

Here's a concise overview of its pin functions:

  • VCC: Power supply input
  • GND: Ground reference
  • EN: Enable input (logic high to enable, logic low to disable)
  • FB: Feedback input for voltage regulation
  • SCL: Clock input for synchronization
  • SDA: Data input/output for communication
  • RST: Reset input for self-testing and watchdog timer
  • VCC_INT: Internal power supply output
  • GND_INT: Internal ground reference output
  • PGOOD: Power good indicator output
  • OVP: Overvoltage protection flag output
  • UVLO: Undervoltage lockout flag output

Please note that this is a summary, and for more detailed information, please refer to the datasheet or manufacturer's documentation.

Manufacturer

The manufacturer of the LM51551QDSSRQ1 is Texas Instruments (TI). Texas Instruments is a leading semiconductor company that designs, manufactures, tests, and sells analog and digital embedded processing systems, including semiconductors, microcontrollers, and application-specific integrated circuits (ASICs).

Applications

The LM51551QDSSRQ1 is suitable for automotive applications such as infotainment systems, advanced driver-assistance systems (ADAS), and LED lighting due to its high efficiency, wide input voltage range, and compact size. It's ideal for use in space-constrained automotive electronics.

Equivalent

Based on Texas Instruments' product information, some equivalent products to LM51551QDSSRQ1 include:

  • LM5115
  • LM5124
  • LM5127
  • LM5130

These synchronous buck converter ICs share similar features and applications with the LM51551QDSSRQ1.

Specifications

Category Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers 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 ~ 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 ~ 150°C (TJ) Mounting Type Surface Mount, Wettable Flank
Base Product Number LM51551 Package/Case WSON-12

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Ratings and Reviews

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Z
Z**y 10/20/2022

Package received, delivery fast kit full all works. recommend

5

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