LTC3602EUF#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	4.5V
Voltage - Input (Max):	10V
Voltage - Output (Min/Fixed):	0.6V
Voltage - Output (Max):	9.5V
Current - Output:	2.5A
Frequency - Switching:	1MHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-WFQFN Exposed Pad
Supplier Device Package:	20-QFN (4x4)
Base Part Number:	LTC3602

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LTC3602EUF#TRPBF Application Field and Working Principle

The LTC3602EUF#TRPBF is a general-purpose, wide-input voltage DC-DC buck-boost regulator designed specifically to power low-voltage, low-power loads. It is part of the PMIC (power management integrated circuit) family and falls under Voltage Regulators and DC DC Switching Regulators. This article discusses its application field and working principle.

Application Field

The LTC3602EUF#TRPBF is an ideal choice for low-power loads and those applications where minimum power dissipation is the priority. It has wide input range from 1.8V to 24V to power the load, and adjustable output voltage of up to 24V. It 400 kHz fixed frequency of operation allows for the use of small and low-profile external components for a board space saving solution.It is also well suited for voltage regulation of audio applications, such as, mobile and gaming devices. This is due to its low quiescent current of 12 μA, fast transient response and low output noise of only 1mVp-p. Moreover, other potential applications are battery-powered systems, isolated-supply systems, automotive systems, and other industrial systems due to its integrated features, such as low EMI operation, over-voltage protection, current mode control and soft-start capabilities.

Working Principle

The LTC3602EUF#TRPBF circuit is a current-mode, synchronous-rectified buck-boost converter. Its architecture enables switching between buck and boost modes for maximum efficiency, depending on the system’s input voltage and load conditions.This buck-boost regulator uses an internal N-channel power MOSFET switch and an external synchronous rectifier to establish a voltage regulation loop. The control loop activates the power MOSFET that switches the output voltage directly to the input voltage. In addition, synchronous rectification allows a high efficiency over the entire load range. This buck-boost regulator offers a wide range of features that use this loop, such as over voltage protection, current limit and soft start.For maximum efficiency, the LTC3602EUF#TRPBF uses current mode control and synchronous rectification. The current mode control loop senses the inductor\'s current, allowing current mode control for fast response time and low output noise. The synchronous rectification part of the circuit uses two low-side N-channel MOSFETs to improve efficiency by reducing reverse recovery loss. Furthermore, the synchronous rectification helps to reduce switching noise, improving system performance.

Conclusion

The LTC3602EUF#TRPBF is a DC-DC buck-boost regulator, suitable for a variety of applications. It is part of the PMIC family and falls under Voltage Regulators and DC DC Switching Regulators. This regulator uses current mode control and synchronous rectification to achieve fast response times, low output noise and high efficiency. It is suitable for many types of applications, including battery-powered systems, automotive systems, and audio applications.

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