LTC3541EDD-1#TRPBF

Voltage/Current - Output 3:	--
Base Part Number:	LTC3541
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	0.9 V ~ 5.5 V
w/Sequencer:	Yes
w/Supervisor:	No
w/LED Driver:	No
Series:	--
Voltage/Current - Output 2:	0.4 V ~ 4.1 V, 300mA
Voltage/Current - Output 1:	0.8 V ~ 5 V, 500mA
Frequency - Switching:	2.25MHz
Number of Outputs:	2
Function:	Any Function
Topology:	Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - Linear + Switching

The LTC3541EDD-1#TRPBF is a three-terminal, adjustable low-dropout linear regulator with low IQ and low quiescent current. It integrates a MOSFET switch and an output voltage supervisory to minimize external components. The device is rated for an adjustable output voltage range of 2.25V – 5.5V and continuous output current of 6.5A. It features fast transient response, excellent line and load regulation, and accurate output current control. Furthermore, the device features short-circuit protection, thermal shutdown, and allows both the switch and linear regulator to operate over temperature. The LTC3541EDD-1#TRPBF is well suited for applications with wide dynamic operating range such as LED lighting and industrial automation systems. It can also be used in high power-density applications where space is limited and superior transient response is required.

Application Field

The wide range of adjustable output voltage, low quiescent current drain, and excellent line and load regulation make the LTC3541EDD-1#TRPBF a suitable solution for power management applications in LED lighting and industrial automation, computer and PC peripherals, USB ports and devices, and battery-powered systems.

Working Principle

The LTC3541EDD-1#TRPBF linear voltage regulator operates by controlling the on-resistance of a MOSFET switch so that a regulated output voltage is maintained in spite of changes in input voltage or load. The devices includes an integrated high-side power MOSFET and output voltage supervisory functions to minimize external components. The MOSFET switch and the linear regulator can both be used over temperature. The device works with an enable/ disable function that controls the PWM mode for the switch. When the enable pin is high, the output switch is fully on and connected to the output voltage and is in linear regulator mode. When the enable pin is low, the switch is disabled, the output is disconnected from the output voltage and is in switch mode. The device has a low quiescent current when operating in switch mode, reducing power loss when the device is idle. Furthermore, the output voltage is monitored continuously and shutdown if it drops out of regulation. The device also provides a fast transient response, with excellent line and load regulation, and accurate output current control over temperature. The LTC3541EDD-1#TRPBF also provides short-circuit protection and thermal shutdown for increased safety. The device is rated for an adjustable output voltage range of 2.25V – 5.5V and continuous output current of 6.5A max.

Conclusion

The LTC3541EDD-1#TRPBF is a three-terminal, adjustable low-dropout linear regulator with low power drain suitable for wide range of applications. It features fast transient response, excellent line and load regulation, and accurate output current control. Furthermore, the device features short-circuit protection, thermal shutdown, and allows both the switch and linear regulator to operate over temperature. Overall, the LTC3541EDD-1#TRPBF is a reliable and efficient solution for power management applications.

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