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LM5164DDAR

TILM5164DDAR

Texas Instruments
Buck Switching Regulator IC Positive Adjustable 1.2V 1 Output 1A 8-PowerSOIC (0.154", 3.90mm Width)
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Overview

The LM5164DDAR is a 100V, 1A synchronous buck converter designed for high-voltage DC-DC regulation with minimal external components. It utilizes a Constant On-Time (COT) control architecture that eliminates the need for loop compensation while providing excellent transient response and high efficiency at light loads.

Why Choose This Part

The wide 6V to 100V input range provides significant headroom for high-voltage applications, while the integrated high-side and low-side NFETs reduce PCB footprint. Its COT architecture ensures fast response and simplifies design by removing the need for complex compensation networks.

Applications

Industrial Power Supplies
Ideal for 48V and 72V nominal rails in factory automation where high-voltage transients are common.
Telecom Infrastructure
Provides efficient step-down conversion from high-voltage distribution buses to intermediate 12V or 5V rails.
Battery Management Systems
Supports wide input ranges for multi-cell battery packs, utilizing low 10.5uA sleep current to extend battery life.

Key Specifications

Function Step-Down
Topology Buck
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-PowerSOIC (0.154", 3.90mm Width)
Current - Output 1A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching Up to 1MHz
Operating Temperature -40degC ~ 150degC (TJ)
Synchronous Rectifier Yes
Voltage - Input (Max) 100V
Voltage - Input (Min) 6V
Voltage - Output (Max) 100V
Supplier Device Package 8-SO PowerPad
Voltage - Output (Min/Fixed) 1.2V

Getting Started

To evaluate this regulator, utilize the LM5164-Q1EVM-041 evaluation module or use TI WEBENCH Power Designer to calculate external component values and simulate thermal performance. Ensure the PowerPAD of the 8-PowerSOIC package is soldered to a large copper plane for optimal thermal dissipation.

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