LT3970EDDB-3.42#TRMPBF

LT3970EDDB-3.42#TRMPBF Application Field and Working Principle

Introduction

The LT3970EDDB-3.42#TRMPBF, by Linear Technology, is an advanced power management switcher designed to minimize hibernation current while delivering up to 3A of output current. Specifically designed to reduce sleep-mode and total battery drain in portable applications, the LT3970EDDB-3.42#TRMPBF provides highly efficient and cost effective power conversion and regulation.

Application Field

The LT3970EDDB-3.42#TRMPBF is ideal for applications that require high efficiency with low quiescent current during operation. These include portable devices such as static and dynamic battery-powered systems, as well as regulated power sources that require low battery drain or high efficiency operation. Its compact size and operating voltage range of 2.7V to 5.5V make it suitable for a wide variety of applications.

Features and Benefits

The LT3970EDDB-3.42#TRMPBF features a wide range of benefits, including:

• High efficiency switching regulator with 95% efficiency at 3A load current
• Supports up to 500kHz switching frequency
• Power-down mode helps reduce total battery drain and provide storage times in excess of 18 months
• Programmable independent soft-start, soft-stop and fast transient response
• Shutdown mode provides 0.01μA typical operating current
• Hibernation Mode provides ultra-low quiescent current values of 0.02μA and 0.2μA

Working Principle

The LT3970EDDB-3.42#TRMPBF is a DC-DC switching regulator with a maximum output current of 3A. It employs the use of Pulse Width Modulated (PWM) control to convert input voltage to the desired output voltage. The PWM pulses are generated by the controller IC and switched by a N-channel MOSFET to create a pattern of power delivery at the output node. This PWM switching also enables the device to offer high efficiency levels with minimal power consumption.

The device also features a hibernation mode which further reduces the quiescent current consumption. In this mode, the regulator’s controller IC is put into a low-power stand-by mode in which it is only partially powered up. This low quiescent current state helps minimize the battery drain and increases the storage time of portable devices powered by the regulator.

In addition, the device features a power-down mode which provides an even lower quiescent current values during idle periods. This makes the device ideal for portable applications that require extended battery life. The device also offers a programmable soft-start time for smooth power-up and a fast transient response for reliable regulation.

Conclusion

Overall, the LT3970EDDB-3.42#TRMPBF is a highly efficient, low quiescent current switching regulator ideal for powering portable applications. Its advanced power management capabilities help to maximize battery life, while its fast transient response ensures reliable voltage regulation. The device is also compact, making it suitable for a wide range of applications.