LT1761MPS5-3.3#TRPBF

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LT1761MPS5-3.3#TRPBF Application Field and Working Principle

The LT1761MPS5-3.3#TRPBF is a low-power, single-phase, linear voltage regulator (PMIC) especially designed for low-noise, low-dropout, and low-loss applications.

The LT1761MPS5-3.3#TRPBF is designed to provide an extremely accurate, constant-voltage supply, even over wide input and load conditions and at temperatures up to 125 degrees Celsius. The 5-pin TSOT package is compatible with industry-standard SOT-23 packages, and its unique high-play capacitance gives it excellent output noise performance over a wide range of temperatures.

The LT1761MPS5-3.3#TRPBF is ideal for powering high-precision sensors and processors, and it is ideal for battery-powered and automotive applications. It provides high accuracy over the entire temperature range, making it ideal for low-noise, low-dropout-regulated applications.

Features:

• Input range of 2.7 to 16 V
• Output voltage range of 3.3 V
• Minimal current consumption for ultra low-power applications
• High accuracy and low noise over the temperature range of -40⁰C to +125⁰C
• Integrated current limiter and thermal protection
• TSOT-5 package

Applications:

• Wearable and portable electronic devices
• Power supply for critical analog circuits
• Battery powered devices
• Sensor measurement applications
• Automotive power systems

Working Principle

The LT1761MPS5-3.3#TRPBF Voltage Regulator is a member of Linear Technology\'s family of low quiescent current linear regulators. This particular unit is a mono-mode, rectangular V-I converter designed to produce a regulated output voltage in response to an input voltage significantly higher than the output voltage. As a mono-mode converter, it employs one active control element.

The operation of the LT1761MPS5-3.3#TRPBF begins when the input voltage is greater than the dropout voltage. The voltage difference is called the output voltage headroom (VH+). When the input voltage is greater than the VH+, the device is in the regulation mode. This is the same mode used in power supplies to discharge the output capacitors and provide the regulated voltage.

The output voltage is regulated by drawing a current through the internal N-channel pass device, setting a voltage across the pass device, which transfers to the output. The internal N-channel pass device can be either an enhancement-mode or a depletion-mode MOSFET. The reduction in the pass device\'s resistance helps regulate the output and keep it steady, even when the input voltage changes, as long as the headroom voltage is more than the dropout voltage.

The input voltage can range from as low as 2.7V and up to 16V. With a 3.3V regulated output, the dropout voltage of the LT1761MPS5-3.3#TRPBF is typically >50mV at full load. In addition, quiescent current is a very low 35μA (typical) and shuts off at light load for ultra-low-power operation.

The LT1761MPS5-3.3#TRPBF is supplied in a TSOT-5 package, which is compatible with industry-standard SOT-23 packages and also provides a unique high-play capacitance that gives this device excellent output noise performance over a wide range of temperatures.

In conclusion, the LT1761MPS5-3.3#TRPBF is an ideal choice for low-noise, low-loss, low-dropout, and low-power linear voltage regulator applications. Its extremely high accuracy, low-noise characteristics, wide input range and temperature range make it ideal for a wide variety of applications, such as powering high-precision sensors, processors, automotive power systems, and other power supplies.

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