Nisshinbo Micro Devices Inc. Voltage Regulators - DC DC Switching Regulators R1245S003A-E2-JE

The R1245S003A-E2-JE is a step-down DC/DC converter designed for automotive applications, compliant with AEC-Q100 standards. It features an internal N-channel MOSFET with an ON resistance of 0.35 Ω, capable of delivering a maximum output current of 1.2 A. The input voltage range is from 4.5 V to 30 V, with a maximum rating of 32 V. The device operates over a temperature range of -40°C to 105°C. This regulator employs a current mode control scheme without the need for an external current sense resistor, ensuring fast response and high efficiency. The output voltage can be adjusted to 0.8 V or higher using external resistors, with a feedback voltage tolerance of ±1.0%. The internal oscillator frequency is preset at 330 kHz for this version, and it includes built-in protection features such as thermal shutdown, under-voltage lockout, and peak current limiting. The R1245S003A-E2-JE is packaged in an HSOP-8E format and is suitable for applications such as powering car audio equipment, navigation systems, and control units for electric vehicles. It is recommended to use ceramic capacitors for both input and output to optimize performance.