BD4827G-TR Integrated Circuits (ICs)

Series:	BD48xxx
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Voltage Detector
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	--
Voltage - Threshold:	2.7V
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	5-SSOP
Base Part Number:	BD48

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IntroductionThe BD4827G-TR is a high-performance, ultra-low-dropout linear regulator (LDO) from ROHM Semiconductor, suitable for embedded power applications. It has a wide input voltage range from 4.0V to 28.0V, making it suitable for automotive, industrial, laptop and computer applications. The BD4827G-TR has a dropout voltage of only 0.23V at nominal current. This low dropout level improves overall system efficiency and extends battery run-time in battery-powered systems.Application AreasThe BD4827G-TR LDO can be used in a variety of embedded power applications, such as automotive, industrial, laptop and computer applications, due to its wide input voltage range. For example, in car audio systems, the BD4827G-TR LDO could be used to supply precise voltages to the audio amplifiers, filters and power amplifiers. In industrial applications, the BD4827G-TR could be used for powering small sensors and for powering multiple voltage levels for logic control or signal processing. In laptop computers, the BD4827G-TR can be used as a post regulator to provide precise supply voltages for the memory and systems storage and fan motor. The BD4827G-TR LDO can also be used to power the microcontroller for data sensing and processing.Features & BenefitsThe BD4827G-TR LDO provides a wide input voltage range from 4.0V to 28.0V, making it ideal for automotive, industrial, laptop and computer applications. With a low dropout voltage of 0.23V at nominal current, the BD4827G-TR improves overall system efficiency and extends battery run-time of battery-powered systems. The BD4827G-TR LDO has an adjustable current capability of 12mA to 30mA and an adjustable voltage output range of 1.5V to 5.0V. The LDO is protected against overvoltage, overcurrent, and short-circuit conditions. The BD4827G-TR can operate over the extended temperature range of -40°C to +125°C, ensuring reliable operation in harsh environmental conditions. Furthermore, the device is RoHS-compliant and fully AEC-Q100 qualified. Working PrincipleThe BD4827G-TR is an advanced LDO that uses a control circuit to monitor the output voltage and buffer the real pressure. The control circuit increases operating efficiency and improves the accuracy of the output voltage by automatically adjusting the internal bias voltage in response to changes in temperature and load.The BD4827G-TR control circuit includes a low noise operational amplifier, reference voltage source, error correction circuit, and amplifier current control circuit. The operational amplifier determines the voltage applied from the output voltage to the output side of the feedback loop. This feedback voltage is compared to the reference voltage, which is the nominal output voltage set by the user. If the feedback voltage is higher than the reference voltage, the error voltage is generated that provides a current to the error diversion portion. This current reduces the voltage in the buffer portion of the amplifier, which in turn reduces the bias voltage applied to the current control circuit, reducing the current into the buffer and output terminals. The opposite action occurs when the feedback voltage is lower than the reference voltage. This control loop is constantly being adjusted to keep the output voltage at the desired value.ConclusionThe BD4827G-TR LDO from ROHM Semiconductor is a high-performance, ultra-low-dropout linear regulator suitable for a variety of embedded power applications. It has a wide input voltage range from 4.0V to 28.0V and a dropout voltage of only 0.23V at nominal current to improve system efficiency. It also has adjustable current capability and adjustable output voltage range, and protection against overvoltage, overcurrent, and short-circuit conditions. The BD4827G-TR LDO is suitable for automotive and industrial applications, as well as for laptop and computer applications. It operates over the extended temperature range of -40°C to +125°C and is RoHS-compliant and fully AEC-Q100 qualified. The BD4827G-TR operates using a control circuit to keep the output voltage at the desired value.

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