LD6815TD/18P,125 Integrated Circuits (ICs)

Current - Output:	150mA
Base Part Number:	LD6815
Supplier Device Package:	5-TSOP
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Transient Voltage
Control Features:	Enable
PSRR:	75dB (1kHz)
Current - Supply (Max):	150µA
Current - Quiescent (Iq):	35µA
Series:	--
Voltage Dropout (Max):	0.25V @ 150mA (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LD6815TD/18P, 125 application field and working principle

LD6815TD/18P, 125 is a three-terminal low-dropout regulator suitable for cascode applications or other topology replacements that require a high-current output. In addition, this device has adjustable voltage and current limiting to provide protection against overload. The thermal shutdown feature protects the device when the junction temperature exceeds 150°C. Although this device has been designed as an adjustable current regulator suitable for high-current applications, it is also suitable for use in specialized voltage regulation circuits.

Applications

The LD6815TD/18P,125 is suitable for many DC to DC converter applications. It is commonly used for circuit protection in high-current switching for automotive, process control, and power supply applications. The adjustability of the device allows for various input and output voltages. It is also used in battery eliminate circuits or other power applications that require a significant amount of current when used in voltage regulation. In addition, this device is often used as the output stage in voltage multiplier circuits.

Working Principle

The LD6815TD/18P,125 is a linear voltage regulator, which means it works by a process known as linear adjustment. This adjustment works by changing the output current in order to meet an ideal output voltage. The device adjusts the output current based on the output voltage set by the user. The voltage reference on this regulator is set to 1.2V, and once the desired voltage is set, the device will make the necessary adjustments to maintain the output voltage.When an input voltage higher than the output voltage is applied, the current will increase accordingly. The device will then adjust the output current to ensure that the voltage is held at the set value. Similarly, when the input voltage is lower than the output voltage, the current will be reduced accordingly. This ensures that the voltage is maintained and the output current is equal or less than the input voltage.The LD6815TD/18P,125 also provides overload protection with its adjustable current limit. This protection is adjustable and will shut off the output when the current exceeds the user set limit. In addition, this device has thermal protection to provide protection against excessive heat, which can be caused by high output or input voltages.

Conclusion

The LD6815TD/18P,125 is a linear voltage regulator ideal for DC to DC converters, circuit protection and other power applications, including voltage multiplier circuits. The device provides adjustable voltage and current limiting and thermal shutdown features to ensure optimal protection and reliability. With its adjustable settings and protection features, the LD6815TD/18P,125 is an excellent choice for a variety of applications.

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