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
LTC3857EUHLinear Technology / Analog Devices