LT3089EFE#PBF

Current - Output:	800mA
Base Part Number:	LT3089
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Short Circuit
Control Features:	Current Limit
PSRR:	90dB ~ 20dB (120Hz ~ 1MHz)
Current - Supply (Max):	3mA
Current - Quiescent (Iq):	50.5µA
Series:	--
Voltage Dropout (Max):	1.65V @ 800mA
Voltage - Output (Max):	34.5V
Voltage - Output (Min/Fixed):	0V
Voltage - Input (Max):	36V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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LT3089EFE#PBF Application Field and Working Principle

LT3089EFE#PBF is a general purpose 3A adjustable LDO linear regulators with high PSRR, low noise and low quiescent current designed for battery-powered applications. It provides excellent load transient response and is optimized to operate with low dropout voltage. It uses wide Vin design, with input voltage range from 2.2V to 42V and is available in an ultra-small SOT-23-5 package. The LT3089EFE#PBF is suitable for variety of applications such as high power portable audio, Bluetooth Low Energy modules, automotive camera applications, projectors, power supplies, and many other battery-powered applications.

Overview of LT3089EFE#PBF

LT3089EFE#PBF is a high PSRR, wide Vin adjustable 3A low dropout transistor (LDO) linear regulator that limits output voltage in the range of 2.0V to 18V adjustable. It provides well-regulated output voltage, excellent line and load regulation, and fast response time to the load transients with low noise, low EMI, and low quiescent current. Besides, it also integrates current limiting and thermal shutdown protection to ensure safe operation. Additionally, its SOT-23-5 package saves board space and optimizes thermal performance.

Applications of LT3089EFE#PBF

LT3089EFE#PBF is ideal for powering FPGAs, ASICs and other low-voltage circuits requiring high-voltage operation at relatively high current. Due to its wide Vin and SOT-23-5 package, it is suitable for high power applications such as high-end consumer electronics, automotive camera applications, portable audio, Projectors and many other battery-powered applications.

Working Principle of LT3089EFE#PBF

LT3089EFE#PBF is an adjustable low-dropout (LDO) linear regulator, which works on the principle of controlling a transistor between the input voltage and the output voltage. A voltage reference is used to control the transistor’s current, which is proportional to the output voltage.In operation, the voltage at the anode of the control transistor is determined by the voltage across the output and voltage reference, while the voltage at its gate is determined by the output voltage. When the output voltage increases, the gate voltage of the transistor will increase as well, thus increasing the current flowing through the transistor and this increases the power dissipation. The control circuit dissipates enough power to reduce the output voltage to the desired level.

Conclusion

In summary, LT3089EFE#PBF is a 3A adjustable low dropout linear regulator ideal for battery-powered applications. It has wide Vin design with input voltage range from 2.2V to 42V and output voltage range from 2.0V to 18V, high PSRR, low noise and low quiescent current. It provides excellent load transient response with current limiting and thermal shutdown protection. Furthermore, its SOT-23-5 package and wide operating temperature range make it ideal for various applications including high-end consumer electronics, automotive camera applications and portable audio.

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