LM109H/NOPB

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LM109H/NOPB is an adjustable three-terminal positive voltage low dropout regulator. The dropout voltage is typically 1.5V at 5A output current and 1.0V at 1A. With on-chip trimming, the outputs can be adjusted over a 1.2V to 28V range and is exceptionally well suited for systems powered from 5V, 12V, or 24V sources. It remains stable even when bypassed with a capacitor and is superior to traditional regulators in terms of current accuracy and transient response.

The LM109H/NOPB is designed to meet the following requirements: fast response, constant output voltage, and low dropout voltage at low input-output differential voltages. In addition, the device features temperature temperature compensation circuitry and thermal protection. The operating temperature range is -40 to +125 oC, making the LM109H/NOPB suitable for a wide range of applications.

Application Field

The LM109H/NOPB has a wide range of applications such as consumer electronics, automotive, and industrial systems. In consumer electronics, it can be used as a power supply for Audio/Video components such as TVs, digital cameras, and CD players, as well as small portable devices and computers. In automotive electronics, it helps manage auxiliary system power for airbags, ignition, or climate control systems. In industrial systems, it can be used as a reliable power supply for process control, communications, and medical systems.

Working Principle

The LM109H/NOPB incorporates a voltage regulator, an error amplifier and a series pass element in a single monolithic device. The regulator is a three-terminal device which operates as either a voltage regulator or a current regulator depending on the demands of the circuit. The error amplifier compares the output voltage with a predetermined reference voltage and adjusts the voltage regulator to produce the desired output.

The series pass element is used to bypass the output voltage to the load. This ensures a precise current flow to the load and prevents the output voltage from overshooting. The device also features on-chip trimming and thermal protection circuitry which adjusts the device characteristics over the specified temperature range.

In conclusion, the LM109H/NOPB is an ideal voltage regulator for a wide range of applications. It offers precise current regulation, temperature compensation, and fast transient response. Its small form factor, low power consumption, and low dropout voltage make it an attractive solution for a variety of applications.

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