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LM3102 Datasheet PDF - National ->Texas Instruments

Part NumberLM3102 National-Semiconductor
National ->Texas Instruments National-Semiconductor
DescriptionSIMPLE SWITCHER® Synchronous 1MHz 2.5A Step-Down Voltage Regulator
LM3102 Datasheet PDF : LM3102 pdf   


LM3102 image

General Description
The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2.5A to loads with an output voltage as low as 0.8V. 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. It 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 be tween the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-voltage lock-out. The LM3102 is available in the thermally enhanced eTSSOP-20 package.

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
■ Pre-bias startup
■ Ultra-fast transient response
■ Programmable soft-start
■ Programmable switching frequency up to 1 MHz
■ Valley current limit
■ Output over-voltage protection
■ Precision internal reference for an adjustable output voltage down to 0.8V
■ Thermal shutdown

Typical Applications
■ 5VDC, 12VDC, 24VDC, 12VAC, and 24VAC systems
■ Embedded Systems
■ Industrial Control
■ Automotive Telematics and Body Electronics
■ Point of Load Regulators
■ Storage Systems
■ Broadband Infrastructure
■ Direct Conversion from 2/3/4 Cell Lithium Batteries Systems

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