EmbeddedRelated.com
    Parts   Power Management  Switching Regulators    LM5163 Switching Regulators Family    LM5163    LM5163DDAR
LM5163DDAR

TILM5163DDAR

Texas Instruments
Buck Switching Regulator IC Positive Adjustable 1.2V 1 Output 500mA 8-PowerSOIC (0.154", 3.90mm Width)
Active7,294 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LM5163DDAR is a 100V, 0.5A synchronous buck converter designed for wide input voltage applications with ultra-low quiescent current. It utilizes a Constant On-Time (COT) control architecture that requires no external loop compensation and maintains high efficiency at light loads through diode emulation. The integrated high-side and low-side power MOSFETs simplify design while providing reliable power conversion in a compact SO PowerPAD package.

Why Choose This Part

The device features a 100V maximum input rating, providing significant headroom for high-voltage surges and transients. Its COT architecture enables nearly instantaneous load transient response and eliminates the need for complex compensation components, reducing PCB footprint and design complexity.

Applications

High-Voltage Battery Packs
Ideal for 48V to 80V battery-powered systems requiring efficient step-down to logic levels with minimal standby current.
Industrial Field Transmitters
Provides power for 4-20 mA loop-powered devices where low IQ (10.5uA) is critical for system operation.
Telecom Power Modules
Suitable for auxiliary bias supplies in telecommunications infrastructure with high transient voltage requirements.
E-Bike and Scooter Electronics
Efficiently steps down high battery voltages to power headlights, displays, or controllers.

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 500mA
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 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

Start design using the LM5163-Q1EVM-210 evaluation module to test transient response and thermal performance. Use the TI WEBENCH Power Designer tool to calculate the feedback resistor divider and select the output inductor for your specific voltage and current requirements.

Also Consider

LM5164 TITexas Instruments - Offers a higher 1A output current capability while maintaining the same 100V input range and pin compatibility.

Categories

Power Management > Switching Regulators Power Management > DC-DC Converters