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Introduction, features, and applications of Renesas Electronics RAA21180x DC/DC buck regulator

2/27/2024 9:45:00 AM

Summary: Ultra-low quiescent current buck regulator with wide input voltage range 7V to 80V.

Renesas Electronics RAA21180x DC/DC buck regulator

Renesas Electronics RAA21180x DC/DC step-down regulators are ultra-low quiescent current step-down regulators with a wide input voltage range of 7V to 80V. These regulators feature up to 300mA output current and a 75ns minimum on-time. The RAA21180x regulators offer variable frequency operation, allowing the user to program the frequency from 10µH to 33µH via an external inductor. Additionally, these regulators feature pre-biasing for smooth and monotonous startup. Typical applications include general purpose or LDO replacement, industrial power supplies, embedded systems and I/O power supplies, e-bikes, power tools and home/industrial automation.

The RAA21180x regulators include extensive protection, including overcurrent protection, input undervoltage lockout (UVLO) protection, overtemperature protection (OTP) and output overvoltage protection (OVP). These regulators operate over the -40°C to 125°C operating temperature range, are packaged in TSOT23-5, and are RoHS compliant.


specification

  • 7V to 80V input supply voltage range

  • Output current up to 300mA

  • I(Q)=5.5µA, 80V, no load and switched

  • I(Q)=4.5µA, 80V, no load, no switch

  • Minimum on time 75ns

  • Variable frequency operation, frequency set by external inductor (10µH to 33µH)

  • Pre-biased, monotonous, smooth start

  • Protection: Overcurrent protection, input undervoltage lockout (UVLO) protection, overtemperature
    OTP and output overvoltage protection (OVP)

  • Accurate EN threshold

  • 2.9mm x 1.63mm TSOT23-5 package


app

  • Universal or LDO replacement

  • Industrial power supply

  • Embedded Systems and I/O Power

  • electric bicycles, power tools

  • Home/Industrial Automation


Typical application circuit


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