LTC7103EUHE#TRPBF

Voltage - Output (Min/Fixed):	1V
Base Part Number:	LTC7103
Supplier Device Package:	36-QFN (5x6)
Package / Case:	26-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	2.3A
Voltage - Output (Max):	105V
Series:	--
Voltage - Input (Max):	105V
Voltage - Input (Min):	4.4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LTC7103EUHE#TRPBF is a high efficiency, monolithic dual step-down regulator with independent outputs. It provides adjustable output voltages of 1.2V to 3.3V on each output. The integrated power management features protect against overloads and thermal runaway conditions under all operating conditions. The switching regulators are a versatile and cost effective, providing power for microprocessors, memory, and other fixed, regulated voltage requirements.

Features

The LTC7103EUHE#TRPBF includes a number of important features that make it a good choice for microprocessor, memory, and other low power applications. Linear Technology’s proprietary optimized gate driver is included, providing fast and efficient switching of the output MOSFETs. It also features an adjustable linear regulator (ALR) with a programmable threshold voltages, and a gate driver circuit that senses under-voltage conditions and shuts down the LTC7103EUHE#TRPBF when VIN drops below the selectable threshold voltage. The LTC7103EUHE#TRPBF has adjustable output voltage from 1.2V to 3.3V and includes an adjustable current limit and an adjustable soft-start to minimize inrush currents. The high frequency design enables ultra-small form factor, resulting in low-profile designs that fit where larger parts won’t.

Applications

The LTC7103EUHE#TRPBF is ideal for use in low power systems, as it offers improved efficiency, reduced power dissipation, and is compatible with low input voltage sources. It can be employed in high efficiency step down DC/DC converters, and features a power-saving feature that automatically shuts down the controller at light load conditions. It is suitable for a range of application fields, including:* High efficiency step down DC/DC converters* Battery powered systems* Automotive electronics* Industrial automation * Consumer electronics* Communication systems

Working Principle

The LTC7103EUHE#TRPBF uses a synchronous DC-DC buck converter architecture to efficiently regulate two independent output voltages from a single input voltage. The topology employed by the part limits switch losses and input ripple relative to a traditional PWM design. A synchronous rectifier on one of the outputs of the part improves efficiency over traditional diode rectifier buck topologies.The LTC7103EUHE#TRPBF is optimized for low voltage operation. The built-in linear regulator (ALR) monitors the voltage drop across the internal power MOSFETs and adjusts the gate drive to maintain a constant output voltage. The circuitry includes gate drive control loop, an adjustable current limit and an adjustable soft-start to reduce inrush currents. An additional feature is the adjustable under-voltage lockout (UVLO) which disables the part when the input voltage drops below the selectable threshold voltage.

Conclusion

The LTC7103EUHE#TRPBF is a high efficiency, monolithic dual step-down regulator with adjustable output voltages. This device is well suited for use in low power systems, as it offers improved efficiency and reduced power dissipation. It is applicable in a range of application fields, including high efficiency step down DC/DC converters, battery powered systems, automotive electronics, industrial automation, consumer electronics and communication systems. The device uses a synchronous DC-DC buck converter architecture to efficiently regulate two independent output voltages from a single input voltage, and includes an adjustable linear regulator, an adjustable current limit and an adjustable soft-start.

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