Company News

Ⅰ.Overview of product

LMR51420YDDCR is a synchronous buck DC-DC switching regulator developed by Texas Instruments, belonging to Integrated Circuits (ICs) in Power Management (PMIC), which features wide input voltage range, adjustable output and stable performance for various electronic applications.

Ⅱ.Core parameter

Category:Integrated Circuits (ICs),Power Management (PMIC),Voltage Regulators- DC DC Switching Regulators

Mfr:Texas Instruments

Series:SIMPLE SWITCHER®

Packaging:Tape & Reel

Part Status:Active

Function:Step-Down

Output Configuration:Positive

Topology:Buck

Output Type:Adjustable

Voltage - Input (Min):4.5V

Voltage - Input (Max):36V

Voltage - Output (Min/Fixed):0.6V

Voltage - Output (Max):34.2V

Frequency - Switching:1.1MHz

Operating Temperature:-40°C ~ 150°C (TJ)

Mounting Type:Surface Mount

Package / Case:SOT-23-6 Thin, TSOT-23-6

Ⅲ.Main characteristics

Wide Input Range:With input voltage ranging from 4.5V to 36V, it can adapt to various power supply scenarios and stably cope with input voltage fluctuations, ensuring reliable operation of the device.

Adjustable Output:The output voltage is adjustable from 0.6V to 34.2V, which can meet the different voltage requirements of various post-stage electronic components such as MCUs and sensors.

Buck Topology: Adopts buck topology and step-down function, which can efficiently convert high input voltage into low output voltage, with high conversion efficiency and low power loss.

Fixed Switching Frequency:Features a fixed switching frequency of 1.1MHz, which helps to reduce electromagnetic interference (EMI) and simplifies the design of external filters.

Surface Mount Package:Adopts SOT-23-6 Thin and TSOT-23-6 surface mount packages, which are small in size, easy to install and suitable for high-density PCB layout in miniaturized electronic products.

Ⅳ.Application field

Industrial Control:Used in PLC power modules, converting 24V industrial power supply to 3.3V or 5V to provide stable power for PLC core chips and communication modules.

Automotive Electronics:Applied in on-board sensor power supply systems, converting 12V automotive battery voltage to 5V to power automotive temperature sensors and pressure sensors.

Consumer Electronics:Used in portable Bluetooth speakers, converting 5V USB input voltage to 3.7V to charge the built-in lithium battery and power the audio chip.

Smart Home:Applied in smart socket control modules, converting 12V input voltage to 3.3V to supply power for the control chip and WiFi communication module.

Medical Devices:Used in small portable medical monitors, converting 9V battery voltage to 5V and 3.3V to power the monitor’s display screen and detection circuit.

Ⅴ.Summary

LMR51420YDDCR is a high-performance DC-DC switching regulator with excellent electrical parameters and diverse characteristics. It is widely used in various electronic fields, providing efficient, stable and reliable power management solutions for electronic devices.