Manufacturer Part Number
LTC3855EUJ#TRPBF
Manufacturer
Analog Devices
Introduction
The LTC3855 is a high-performance, dual output synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages.
Product Features and Performance
Dual output synchronous step-down controller
Wide input voltage range: 4.5V to 38V
Adjustable switching frequency from 250kHz to 770kHz
Maximum duty cycle of 95%
Integrated synchronous rectifier for improved efficiency
Supports PolyPhase operation
Current mode operation for excellent line and load transient response
Power Good signal output
Product Advantages
High efficiency for reduced power loss
Precision voltage regulation
Dual phase operation reduces input and output ripple
Programmable soft-start for controlled startup
Phase-lockable frequency (250kHz to 750kHz)
Key Technical Parameters
Number of Outputs: 2
Output Phases: 2
Voltage - Supply: 4.5V to 38V
Frequency - Switching: 250kHz to 770kHz
Duty Cycle (Max): 95%
Operating Temperature Range: -40°C to 85°C
Quality and Safety Features
Overcurrent protection
Undervoltage lockout (UVLO)
Thermal shutdown protection
Compatibility
Compatible with a range of N-channel power MOSFETs
Application Areas
High-current, high-performance DC-DC converters
Telecommunications infrastructure
Data networking systems
Industrial and automotive applications
Product Lifecycle
Status: Active
Not reported as nearing discontinuation
Replacement or upgrade options not specified
Several Key Reasons to Choose This Product
High efficiency operation reduces thermal stress and improves system reliability
Wide input voltage range accommodates a variety of power sources
Flexible switching frequency allows optimization between efficiency and component size
Dual outputs can be used in parallel for higher power or to supply different voltage rails
Programmable features for customized power supply performance
Multiple protection features ensure system safety under abnormal conditions