LTC3113IFE#TRPBF

Voltage - Output (Min/Fixed):	1.8V
Base Part Number:	LTC3113
Supplier Device Package:	20-TSSOP-EP
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	300kHz ~ 2MHz
Current - Output:	3A
Voltage - Output (Max):	5.5V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	1.8V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LTC3113IFE#TRPBF is a dual-channel MOSFET driver designed for DC/DC switching regulators in portable applications. The driver incorporates two hysteretic MOSFET gate drivers that are integrated onto a monolithic CMOS IC. It is designed to provide high current drive and voltage regulation circuitry optimized for maximum transient response and robustness while operating at a wide range of input voltages. The device features programmable dead-time, voltage regulation, and mode switching, allowing for easy customization of the power performance and system efficiency.

Application Field and Working Principle

The LTC3113IFE#TRPBF is optimized for portable applications such as battery-powered devices. It is particularly useful in applications requiring high-current, high-efficiency switching regulators. The device features two MOSFET gate drivers that can be configured in either a buck or boost topology. It also features two voltage regulators which can be used to regulate the drain-source voltage of the MOSFETs. The device is designed for use in switch mode DC/DC converters and is highly configurable, enabling the user to program the device for maximum efficiency and robust performance.The working principle of the LTC3113IFE#TRPBF is based on the hysteretic control principle. Hysteretic control helps ensure that switching losses are minimized and that excessive delays do not occur in the response of the output voltage to the switching commands. This self-contained hysteretic control approach ensures that fast transient responses and stable dc output voltage levels are maintained over the entire input voltage range.The device has two integrated MOSFET gate drivers and two internal voltage regulators which allow for optimization of the power and performance of the application. The gate drivers are controlled by PWM inputs, enabling independent control of the MOSFETs. The voltage regulators are controlled by an external feedback voltage divider and set resistor, or alternatively, an external reference. The voltage regulation circuit controls the drain-source voltage of the MOSFETs, ensuring that it remains within a specified range.The device is highly configurable, allowing the user to program various parameters, such as the minimum and maximum cycle-by-cycle output current, the overload current limit, the hysteresis level, and the minimum on-time required to maintain safe operation. It also features programmable dead-time, enabling users to minimize switching losses and minimize ripple and noise on the output.

Conclusion

The LTC3113IFE#TRPBF is a dual-channel MOSFET driver designed for DC/DC switching regulator applications. It is optimized for portable and high-current applications and is highly configurable, allowing for easy customization of the power performance and system efficiency. The device features two hysteretic MOSFET gate drivers, two voltage regulators, and programmable dead-time, enabling users to design a power solution that meets their specific needs.

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