LT3506EFE#PBF

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	LT3506
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 ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	575kHz
Current - Output:	1.6A
Voltage - Output (Max):	23.25V
Series:	--
Voltage - Input (Max):	25V
Voltage - Input (Min):	3.6V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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Introduction

The LT3506EFE#PBF is a high-efficiency, high-frequency DC-DC switching regulator with integrated MOSFET and output switching power available in a tiny surface-mount package. It is part of the PMIC (Power Management IC) family and belongs to the voltage regulator subcategory—more precisely, it belongs to the DC-DC switching regulators group.

Application Field

The LT3506EFE#PBF is suitable for fast transient and low input-voltage applications. It offers a wide input voltage range (2V to 28V typical), making it operational even in industrial and automotive applications (the minimum supply voltage of automotive-grade components must not be lower than 6V). Given its small size and low component count, this device is ideal for space-constrained designs. In addition, its high-frequency operation and fast loop response make it especially suitable for lightweight synthesizers, portable battery powered systems and automotive audio power amplifiers.

Device Specification

To suitable for space-constrained applications and provide low component count, the LT3506EFE#PBF device operates with a tiny 3x2.4mm surface-mount package. Its parameters include:

• Input voltage range: 2V to 28V typical
• Output voltage: Adjustable up to 21V
• Integrated MOSFET output switching power: 10W typical
• Output current in CV mode: 3A minimum
• Switching frequency: 1.2MHz maximum
• Enable input: Logic low (1.6V maximum)
• Thermal shutdown: 165°C typical

Working Principle

The LT3506EFE#PBF operates in a buck switching regulator based on a fixed frequency PWM architecture. In order to reduce output ripple, the built-in Soft-Start prevents large input current spikes and enables the output voltage to rise gradually. The device also takes advantage of Low-Side MOSFET sensing and Artificial Intelligent (AI) adaptive loop response, over-temperature protection, over-voltage protection, current limit, and thermal shutdown. The AI component of the open-loop control system dynamically adjusts the regulated output voltage according to the output load currents, minimizing output voltage errors and ensuring a fast transient responses.

Conclusion

The LT3506EFE#PBF is a high-efficiency, high-frequency DC-DC switching regulator with integrated MOSFET and output switching power, suitable for fast transient, low input-voltage applications. Its wide input voltage range, small size and low component count makes it an ideal choice for space-constrained designs. In addition, its high-efficiency, integrated MOSFET output switching power, low-side MOSFET sensing, and Artificial Intelligent adaptive loop response provide excellent performance in terms of fast transient response and output stability.

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