BD50C0AHFP-CTR

Voltage Dropout (Max):	0.5V @ 500mA
Supplier Device Package:	HRP-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	55dB (120Hz)
Current - Quiescent (Iq):	2.5mA
Current - Output:	1A
Series:	Automotive, AEC-Q100
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	26.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The BD50C0AHFP-CTR is a linear low dropout (LDO) voltage regulator chip. It is commonly used in circuits and components needing low noise, low ripple and accurate voltage regulation. It is also used in situations where a little bit of power dissipation is tolerable. The chip offers excellent power supply noise suppression and load regulation capabilities even across wide range of temperatures, loads and input voltages.

Function and Features

The BD50C0AHFP-CTR is a two-terminal device that provides a single output voltage with a maximum current of 500mA. The black box is built on a small 20-pin package and features a monolithic structure. It incorporates a precision bandgap reference, a low dropout voltage power MOSFET, a series-controlled current amplifier and an output stage. The output voltage of the BD50C0AHFP-CTR is adjustable over a range of 1.6 to 5.6V. It is programmed using external potentiometer, bypassing the conventional cooling techniques such as heat-sinks and compact packaging. The voltage is set with two resistors. The accurate value is obtained depending on the external resistor selection. The output voltage features a good line and load regulation that ensures stable output levels even in the event of sudden changes in the load or power supply voltage. The maximum output current is limited to 500mA, even when the voltage rises above the VOUT level. The BD50C0AHFP-CTR has low noise and low distortion characteristics. Its output automatically shuts down in case of an input over-voltage or short circuit condition. The chip also protects itself against over-current, thermal runaway and transient response.

Application Fields

The BD50C0AHFP-CTR low dropout voltage regulator is widely used in consumer electronics, automotive and industrial applications. It is suitable for powering audio equipment, PLCs, digital ICs, microprocessors, wireless ICs and other ICs requiring low noise and reliable operation.It is also commonly used in notebooks, servers, memory cards, rechargeable batteries, set-top boxes and 3G/4G communication systems. The chip can be used in products that require low power consumption and accurate voltage regulation.

Working Principle

The BD50C0AHFP-CTR is a low dropout voltage regulator, which uses a two-terminal voltage source for regulation. It is based on the classical voltage regulation circuit with an adjustable positive terminal of the device, the output (VOUT) and the ground terminal for regulation.The device comprises a series-controlled power MOSFET with the gate connected to a bandgap reference voltage and the source connected to ground. The output voltage is set by two resistors, R1 and R2, with R2 connected to the adjustable positive terminal of the device and R1 connected to the output (VOUT) of the device.The bandgap reference voltage sources a reference current, IREF, to the gate of the power MOSFET, creating an ultra-precise voltage potential across the gate-source terminals of the MOSFET. To adjust the output voltage, current, I2, is applied to the corresponding terminals of R2, creating a voltage potential across R2. The power MOSFET sources current towards its drain and the voltage potential across R2 opposes the voltage potential of the bandgap reference until it reaches the desired output voltage. The output current is constantly monitored by the series control to ensure its regulation. In case of a short circuit condition, the device will limit the output current and shut down the output.

Conclusion

The BD50C0AHFP-CTR is a linear low dropout voltage regulator chip that delivers low noise and low ripple. It features excellent line and load regulation, low power dissipation, short circuit protection and thermal runaway protection. The chip is suitable for projects that require low noise and accurate voltage regulation. It can be used in consumer electronics, automotive and industrial applications. The output voltage is adjustable over a range of 1.6 to 5.6V.

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