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DC DC Switching Regulators - LT1936EMS8E#TRPBF

DC-DC switching regulators are used in a variety of applications, including battery-powered devices and embedded systems. The LT1936EMS8E#TRPBF is a synchronous, high efficiency, low quiescent current, step-down regulator with a low RDS(ON) switcher capable of delivering up to 3 A of continuous output current. Operating from an input voltage of 8 V to 55 V, the LT1936EMS8E#TRPBF can be used in a wide range of applications, such as automotive, industrial, medical, communications and consumer products.

Features of LT1936EMS8E#TRPBF

The LT1936EMS8E#TRPBF is designed to offer excellent performance and efficiency in a wide regulation range and input voltage range. The regulator is capable of output voltages from 0.8 V to 18 V with excellent line and load regulations. Maximizing efficiency, the LT1936EMS8E#TRPBF can also operate with a low current level (Typically 50 μA) bypassing the internal PWM control when the output voltage does not require regulation.

The LT1936EMS8E#TRPBF requires a minimum of external components for operation. The regulator includes a low voltage synchronous MOSFET with acceptable fixed frequency of 280 kHz and includes a power good open drain output, enabling the use of the regulator as an intelligent power supply. The current mode Control together with very low internal resistance (RDS(on) of 60 mΩ ) enhance the transient response of the regulator even at light loads.

The regulator also features programmable current limit, soft-start function, internal overtemperature protection, output voltage tracking and can be configured in pulse skipping mode or forced PWM mode to reduce switching frequency when required.

Applications

The LT1936EMS8E#TRPBF is ideal for applications that require high-efficiency and improved transient response, such as automotive electronics, industrial automation, telecom, medical and consumer electronics. It also suits applications that require low quiescent current, such as battery-powered systems, vision systems, and microprocessor-controlled industrial systems.

Working Principle

The LT1936EMS8E#TRPBF is a synchronous, step-down regulator with a low RDS(ON) switcher. It can provide a regulated output voltage from 0.8 V to 18 V. The voltage regulator is controlled by a low voltage synchronous MOSFET with an internal oscillator operating at a fixed frequency of 280 kHz.

The regulator operates in one of two control modes: pulse-skipping or forced PWM mode. In pulse-skipping mode, the regulator operates at a higher frequency that allows its output voltage ripple to be lower or higher than the output frequency. This is useful when a lower response time is not required. In forced PWM mode, the switching frequency is fixed and the output voltage ripple is kept to a minimum.

The LT1936EMS8E#TRPBF is designed for maximum efficiency and low quiescent current. To save power and reduce heat generation, the regulator has a power good open drain output, enabling the use of the regulator as an intelligent power supply. The current mode control and low internal resistance of the regulator ensures excellent transient response and compatibility with a wide range of input voltages.

Conclusion

DC-DC switching regulators are an increasingly common choice for powering electronic systems that require efficient, low quiescent current and improved transient response. The LT1936EMS8E#TRPBF is designed to provide these features in a wide range of input and output voltages, making it ideal for automotive, industrial, medical, communications and consumer electronics applications. The regulator includes a low voltage synchronous MOSFET with acceptable fixed frequency of 280 kHz and includes a power good open drain output, enabling the use of the regulator as an intelligent power supply. With its programmable current limit, soft start feature, and internal overtemperature protection, the LT1936EMS8E#TRPBF is a robust and reliable choice for powering a range of systems.

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