E-L6919ETR

Frequency - Switching:	150kHz
Base Part Number:	L6919E
Supplier Device Package:	28-SO
Package / Case:	28-SOIC (0.295", 7.50mm Width)
Operating Temperature:	0°C ~ 125°C (TJ)
Control Features:	Frequency Control, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	80%
Series:	--
Voltage - Supply (Vcc/Vdd):	7.5 V ~ 15 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The E-L6919ETR is a powerful DC-DC switching controller for point-of-load (POL) applications with a wide voltage range and a large operating range. It supports a wide variety of topologies, including buck, boost, etc, and is fully programmable. With its multi-topology flexibility, it is able to provide designers with the flexibility to configure their system to best meet their design requirements.

Application Field

The E-L6919ETR is ideal for many point-of-load applications, such as automotive, portable equipment, battery management, solar energy, communications, and medical applications. The controller’s wide operating voltage range (from 6 to 46 volts) and its multi-topology flexibility make it ideal for high efficiency, power saving and even 3V/5V/12V/24V systems.In automotive applications, such as central body control units, engine control units, and dashboard units, where wide operating temperature and high reliability are required, the E-L6919ETR provides the flexibility to design the circuitry that best meets the application needs. For example, in powering the system, the E-L6919ETR can be used to reduce the system’s quiescent current and increase the efficiency of the circuitry by automatically selecting the correct topology for the given input voltage.In terms of portable equipment, such as handsets, tablets, and notebooks, the E-L6919ETR provides multi-topology flexibility, allowing designers to reduce power dissipation and increase efficiency in their power supply design.In solar energy applications, where wide input voltage and high efficiency are key considerations, the E-L6919ETR can be used to convert the incoming energy into the necessary voltages, while providing the necessary peak power to support the load.

Working Principle

The E-L6919ETR works on a four phase current sharing controller principle. It uses an alignment circuit to create four distinct current paths to power the load. Each phase of the four-phase circuit is driven in a PWM/PFM mode to provide the optimal efficiency and provide the output voltage regulation. The input voltage is regulated using a voltage regulation loop, which incorporates frequencies and ramp compensation to regulate the output voltage.The E-L6919ETR also features an adjustable slope compensation to reduce switching noise and ripple, as well as a fast transient response to optimize the system’s response time.Finally, the E-L6919ETR provides a wide variety of protection features to protect the system from overcurrent and surge conditions. This includes an adjustable overload current threshold to prevent excessive current loss, short-circuit protection, and an over-voltage protection circuit to prevent overvoltage conditions.

Conclusion

The E-L6919ETR is an extremely flexible DC-DC switching controller, ideal for point-of-load applications. It features a fully programmable multi-topology, an adjustable operating voltage range, and a wide variety of protection features, making it suitable for a variety of applications, including automotive, portable equipment, battery management, solar energy, communications, and medical applications.

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