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R5212D - Step-down DC/DC Converter

General Description

Pin No 1 2 3 4 5 6 Symbol LX GND VDOUT VOUT1 VOUT2 VIN Ground Pin Output Pin of Voltage Detector (N-channel open-drain out-put type) DC/DC converter Step-down Output monitoring Pin Output Pin of Voltage Regulator Voltage Supply Pin Pin Description Switching Pin (P-channel open-drain output type) ∗

Key Features

  • Range of Input Voltage 3.0V~5.5V Built-in Soft-start Function (Typ. 1ms) and built-in power-on reset delay (Typ. 12ms or 50ms) Maximum Output Current500mA (DC/DC), 200mA (VR) Accuracy Output Voltage ±2.0% (DC/DC and Voltage Regulator Output) Accuracy of voltage detector ±2.5% Output Voltage (VR)(A/B Version) Stepwise Setting with a step of 0.1V in the range of 2.0V to 3.6V (C/D Version) Stepwise Setting with a step of 0.1V in the r.

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Datasheet Details

Part number R5212D
Manufacturer RICOH
File Size 835.65 KB
Description Step-down DC/DC Converter
Datasheet download datasheet R5212D Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com R5212D SERIES Step-down DC/DC Converter with VR and Reset NO.EA-128-0510 OUTLINE The R5212D is CMOS-based PWM step-down DC/DC converter combined with a voltage regulator (VR) and a voltage detector (VD), with low supply current. Each of these ICs consists of an oscillator, a PWM control circuit, a voltage reference unit, an error amplifier, a soft-start circuit, a current limit circuit, a phase compensation circuit, a resistor net for voltage detect circuit, an output driver transistor, and so on. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with some external components, or an inductor, a diode, and capacitors. The oscillator frequency is 1.2MHz, therefore small inductor and capacitor can be used with this IC.