LTC3857EUH#PBF - Analog Devices Inc.

Manufacturer Part Number

LTC3857EUH#PBF

Manufacturer

Analog Devices

Introduction

High-performance dual-phase synchronous step-down switching regulator controller

Product Features and Performance

Dual-phase operation

Buck topology

2 output channels

Wide input voltage range (4V to 38V)

Adjustable switching frequency (105kHz to 835kHz or 350kHz to 535kHz dual range)

Maximum duty cycle of 99.4%

Integrated synchronous rectifier for better efficiency

No clock synchronization

Advanced control features including current limit, enable, frequency control, phase control, power good, soft start, and tracking

Product Advantages

Dual-phase design enhances performance by reducing power dissipation and improving transient response

High duty cycle capability for low dropout operation

PolyPhase operation capability for multi-phase applications

Configurable switching frequency allows for optimization of inductor size and efficiency

Key Technical Parameters

Number of Outputs: 2

Output Phases: 2

Voltage - Supply (Vcc/Vdd): 4V ~ 38V

Frequency - Switching: 105kHz ~ 835kHz, 350kHz ~ 535kHz

Duty Cycle (Max): 99.4%

Synchronous Rectifier: Yes

Operating Temperature: -40°C ~ 125°C (TJ)

Quality and Safety Features

Robust construction for harsh environments

Operating temperature range suitable for industrial applications

Compatibility

Surface Mount technology compatible with modern PCB assembly processes

32-WFQFN Exposed Pad package compatible with space-constrained applications

Application Areas

Power regulation for telecommunications

Computing and networking systems

Industrial electronics

Automotive electronics

Product Lifecycle

Active status, not nearing discontinuation

Future upgrades or replacement options may be available

Several Key Reasons to Choose This Product

Highly versatile for a wide range of supply voltages

Efficient power conversion for minimal heat generation

Multi-phase capability allows for scalable power design

Robust operation in extended temperature ranges

Programmable frequency for design flexibility

Surface mount package suitable for compact electronic assemblies

Backed by the reliability and support of Analog Devices