LTC3857EUH#TRPBF - Analog Devices Inc.

Manufacturer Part Number

LTC3857EUH#TRPBF

Manufacturer

Analog Devices

Introduction

High performance dual, PolyPhase synchronous step-down DC-DC controller

Product Features and Performance

Dual Output

PolyPhase Operation

105kHz to 835kHz Adjustable Switching Frequency

Synchronous Rectification

Up to 99.4% Duty Cycle

Current Mode Operation

Compatible with Multiple Topologies including Burst Mode

Adjustable Slope Compensation

Soft-Start Capability

Power Good Output Voltage Monitoring

External Frequency Synchronization

Phase Lockable to 75kHz to 850kHz External Clock

Output Voltage Tracking

Product Advantages

High efficiency through synchronous rectification

Stable operation with ceramic capacitors

Ability to power from a wide input range of 4V to 38V

Low voltage operation down to 0.6V

Precision 0.8V Reference

Ratiometric or Absolute VOUT Tracking

OPTI-LOOP Compensation Minimizes COUT

Key Technical Parameters

Input Voltage Range: 4V to 38V

Output Voltage Range: 0.6 to VCC

Switching Frequency Range: 105kHz to 835kHz or 350kHz to 535kHz

Maximum Duty Cycle: 99.4%

Output Phases: 2

Number of Outputs: 2

Operating Temperature Range: -40°C to 125°C

Quality and Safety Features

Overvoltage Protection

Short-Circuit Protection

Undervoltage Lockout

Thermal Shutdown

Compatibility

Suitable for use with industry-standard surface mount technology

Compatible with high switching frequency requirements

Application Areas

High Power Density Systems

Distributed Power Systems

Telecommunication and Network Equipment

Industrial and Medical Equipment

Aftermarket Automotive Power Systems

Product Lifecycle

Active Product

Not currently nearing discontinuation

Availability of replacements or upgrades to be determined as per manufacturer's lifecycle management

Several Key Reasons to Choose This Product

Dual-phase design improves power distribution and thermal performance

Capable of very high efficiency due to synchronous rectification

Flexibility in design offered by wide input voltage range and adjustable frequency

Optimized for fast transient response

Suitable for complex power supply designs due to PolyPhase capability

High reliability with comprehensive protection features

Facilitates compact design due to integration and small package size