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LTC7103IUHE#PBF

ADILTC7103IUHE#PBF

Analog Devices Inc.
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 2.3A 36-WFQFN, 26 Leads, Exposed Pad
NRND5,368 in stock
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Overview

The LTC7103IUHE#PBF is a high-voltage, synchronous step-down DC/DC converter capable of operating from input voltages as high as 105V. It integrates low-resistance power switches to deliver up to 2.3A of continuous output current while maintaining high efficiency across a wide load range. This regulator is designed for applications requiring a direct step-down from high-voltage rails to low-voltage logic levels without the need for an intermediate transformer.

Why Choose This Part

The primary advantage is its exceptional 105V input capability, which provides significant design margin against surges in 48V systems. It features a proprietary architecture that minimizes EMI and allows for very low dropout operation, while the synchronous rectification eliminates the need for external Schottky diodes, reducing board space and heat.

Applications

Industrial Power Supplies
Provides reliable 24V or 48V bus regulation in harsh industrial environments with high voltage transients.
Automotive 48V Systems
Directly regulates 48V mild-hybrid battery rails down to 12V or 5V subsystems.
Telecommunications
Ideal for 72V distributed power architectures and telecom infrastructure equipment.
Battery Stack Monitoring
Used in large-scale battery management systems where the input voltage can exceed 100V.

Key Specifications

Function Step-Down
Topology Buck
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 36-WFQFN, 26 Leads, Exposed Pad
Current - Output 2.3A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 1MHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier Yes
Voltage - Input (Max) 105V
Voltage - Input (Min) 4.4V
Voltage - Output (Max) 105V
Supplier Device Package 36-QFN (5x6)
Voltage - Output (Min/Fixed) 1V

Getting Started

Designers should use the LTpowerCAD II tool to calculate component values and estimate performance for specific operating conditions. Evaluation can be performed using the DC2521A demonstration circuit, which is pre-configured to showcase the LTC7103 efficiency and thermal performance. Ensure the thermal pad is properly soldered to a large ground plane to handle the heat dissipation at higher current levels.