LM20133MHX/NOPB

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LM20133MHX/NOPB is a high-speed, current-mode, fixed-frequency step down switching regulator that features synchronous rectification, external compensation, current limit, and thermal shutdown. It is typically used in devices and systems that require the control of a step down voltage source, such as power supplies, battery-backed systems, portable devices, and motor drive applications.

This DC-DC switching regulator features a current-mode control with fast-transient response, low noise level, good load regulation, and extended output voltage range. It provides an external compensation network for rapid loop gain setting, enabling ease of design and optimization of system performance. It also integrates high-current internal MOSFETs and synchronous rectifier for high efficiency, as well as current limiting and thermal shutdown for better protection over current protection.

In addition, the LM20133MHX/NOPB contains an enable pin for power on/off control, which enables the use of an external PWM signal for dimming or power control. This switching regulator provides a combination of low cost, high efficiency and small size, making it ideal for applications where board space is at a premium.

The LM20133MHX/NOPB is typically used in applications such as power supplies, battery-backed systems, portable devices and motor drive applications. In power supplies its main application is to convert an input voltage to a lower voltage that can be used to power an application. In battery-backed systems it is used to provide a continuous output voltage even when the battery is discharged or disconnected.

In portable devices, it is used to convert the input voltage from an external power source, such as USB or wall plug, to the required voltage at a low cost and taking up the least possible board space. Lastly, in motor drive applications its primary use is to provide the necessary voltage to power the motor and control its speed.

The working principle of the LM20133MHX/NOPB is based on a pulse-width modulation (PWM) control. The PWM control uses an internal oscillator to drive pulses of varying widths across the switching regulator, which modulates the energy delivered to the output. The amplitude and width of the pulses is determined by the load current and the control voltage set by the external compensation network.

The LM20133MHX/NOPB is designed to maintain the output current at a constant level in response to changes in the load current or voltage. It also has a high switching frequency that enables a faster transient response and better electromagnetic interference (EMI) performance.

Overall, the LM20133MHX/NOPB is a high-speed, current-mode, fixed-frequency step down switching regulator designed for a wide range of applications. It provides an external compensation network for rapid loop gain setting, high current internal MOSFETs and synchronous rectifier for high efficiency, current limiting and thermal shutdown for better protection over current protection, and a PWM control with fast-transient response, low noise level, good load regulation and extended output voltage range.

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