LM3102MHX/NOPB LM3102MHX Power Path Management IC Step-Down Voltage Regulator 20-HTSSOP -40 to 125

1 Features

• Low Component Count and Small Solution Size

• Stable With Ceramic and Other Low-ESR

  Capacitors

• No Loop Compensation Required

• High Efficiency at a Light Load by DCM Operation

• Prebias Start-Up

• Ultra-Fast Transient Response

• Programmable Soft-Start

• Programmable Switching Frequency up to 1 MHz

• Valley Current Limit

• Output Overvoltage Protection

• Precision Internal Reference for an Adjustable Output Voltage Down to 0.8 V

• Thermal Shutdown

• Key Specifications

  • – Input Voltage Range 4.5 V to 42 V

  • – 2.5-A Output Current

  • – 0.8 V, ±1.5% Reference

  • – Integrated Dual N-Channel Main and Synchronous MOSFETs

  • – Thermally Enhanced HTSSOP-20 Package

2 Applications

• 5-VDC, 12-VDC, 24-VDC, 12-VAC, and 24-VAC Systems

• Embedded Systems and Industrial Control

• Automotive Telematics and Body Electronics

• Point of Load Regulators

• Storage Systems

• Broadband Infrastructure

• Direct Conversion from 2-, 3-, and 4-Cell Lithium Batteries Systems

3 Description

The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost-effective buck regulator. The device can supply 2.5 A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low-ESR output capacitors. The device requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the ON-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC undervoltage lockout (UVLO), output overvoltage protection, thermal shutdown, and gate drive UVLO. The LM3102 is available in the thermally enhanced HTSSOP-20 package, and LM3102 is also available in a DSBGA low-profile chip-scale package with reduced output current.

Device Information