LTC3412

PRODUCTION

2.5A, 4MHz, Monolithic Synchronous Step-Down Regulator

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Overview

  • High Efficiency: Up to 95%
  • 2.5A Output Current
  • Low Quiescent Current: 62µA
  • Low RDS(ON) Internal Switches: 85mΩ
  • Programmable Frequency: 300kHz to 4MHz
  • No Schottky Diode Required
  • ±2% Output Voltage Accuracy
  • 0.8V Reference Allows Low Output Voltage
  • Selectable Forced Continuous/Burst Mode Operation with Adjustable Burst Clamp
  • Synchronizable Switching Frequency
  • Low Dropout Operation: 100% Duty Cycle
  • Power Good Output Voltage Monitor
  • Overtemperature Protection
  • Available in 16-Lead Thermally Enhanced TSSOP and QFN Packages

The LTC3412 is a high efficiency monolithic synchronous, step-down DC/DC converter utilizing a constant frequency, current mode architecture. It operates from an input voltage range of 2.625V to 5.5V and provides an adjustable regulated output voltage from 0.8V to 5V while delivering up to 2.5A of output current. The internal synchronous power switch with 85mΩ on-resistance increases efficiency and eliminates the need for an external Schottky diode. Switching frequency is set by an external resistor or can be sychronized to an external clock. 100% duty cycle provides low dropout operation extending battery life in portable systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

The LTC3412 can be configured for either Burst Mode® operation or forced continuous operation. Forced continuous operation reduces noise and RF interference while Burst Mode operation provides high efficiency by reducing gate charge losses at light loads. In Burst Mode operation, external control of the burst clamp level allows the output voltage ripple to be adjusted according to the requirements of the application. To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle).

Applications

  • Portable Instruments
  • Battery Powered Equipment
  • Notebook Computers
  • Distributed Power Systems
  • Cellular Telephones
  • Digital Cameras
LTC3412
2.5A, 4MHz, Monolithic Synchronous Step-Down Regulator
Figure 1. 2.5V, 2.5A Step-Down Regulator Efficiency vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 2

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC3612
PRODUCTION 3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3412
  • LTC3412A

LTpowerCAD 1

Design tools for the following parts are available in LTpowerCAD:

  • LTC3412
  • LTC3412A
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
DC456A

LTC3412EFE | 2.5A Monolithic, Sync. Step-Down Regulator, 2.5-5.5VIN, Jumper Selectable 1.8, 2.5, or 3.3VOUT @ 2.5A

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Product Details

DC456A: Demo Board for LTC3412 2.5A, 4MHz, Monolithic Synchronous Step-Down Regulator.
DC456A
LTC3412EFE | 2.5A Monolithic, Sync. Step-Down Regulator, 2.5-5.5VIN, Jumper Selectable 1.8, 2.5, or 3.3VOUT @ 2.5A
DC456A - Schematic

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