MCP1792 LDO Voltage Regulator: Features, Applications & Specifications

The MCP1792 is a high-voltage, low-quiescent-current Low Dropout (LDO) voltage regulator from Microchip Technology, designed for battery-powered, industrial, and automotive-adjacent applications. It provides a stable, low-noise regulated output while supporting a wide input voltage range, making it ideal for powering microcontrollers, sensors, and communication modules.

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What is MCP1792?

The MCP1792 is a linear voltage regulator optimized for applications where low power consumption and high input voltage tolerance are required. Unlike switching regulators, it produces a clean output with minimal ripple, which is critical for sensitive analog and RF circuits.

It is available in fixed and adjustable output voltage versions, allowing designers to generate common rails such as 1.8 V, 3.3 V, and 5 V from higher-voltage sources.

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Key Features of MCP1792

✔ 1. Wide Input Voltage Range

• Operates up to 45 V input
• Suitable for industrial and battery-powered systems

✔ 2. Low Quiescent Current

• Very low standby current (typically 2 µA)
• Ideal for sleep-mode and always-on devices

✔ 3. Low Dropout Voltage

• Ensures regulation even when input voltage is only slightly higher than output
• Improves efficiency in battery-powered applications

✔ 4. Fixed and Adjustable Output Options

• Fixed outputs: 1.8 V, 2.5 V, 3.3 V, 5.0 V
• Adjustable version via resistor divider

✔ 5. Low Output Noise

• Clean power for analog sensors and RF modules
• Improves ADC and measurement accuracy

✔ 6. Integrated Protection Features

• Overcurrent protection
• Thermal shutdown
• Short-circuit protection

✔ 7. Small Surface-Mount Packages

• Available in SOT-23 and DFN
• Suitable for compact PCB layouts

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Applications and Uses of MCP1792

The MCP1792 is widely used in low-power and high-voltage electronics, including:

1. Microcontroller Power Supply

• Powering PIC, AVR, ARM, ESP, and other MCUs
• Stable 3.3 V and 5 V rails

2. Battery-Powered Devices

• Li-ion, LiFePO₄, and multi-cell battery systems
• Wearables and portable electronics

3. Industrial Electronics

• Sensor nodes
• Control and monitoring equipment

4. Communication Modules

• Bluetooth, Wi-Fi, LoRa, GSM modules

5. Precision Analog Circuits

• Sensors
• ADC reference supplies

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MCP1792 Electrical Specifications (Typical)

Parameter	Value
Regulator Type	Low Dropout (LDO)
Input Voltage Range	Up to 45 V
Output Voltage Range	1.8 V – 5.0 V (fixed), adjustable
Maximum Output Current	Up to 100 mA
Dropout Voltage	Low (typ. < 300 mV @ light load)
Quiescent Current	~2 µA (typical)
Output Noise	Low
Operating Temperature	−40°C to +125°C
Protection Features	OCP, SCP, Thermal shutdown
Package Options	SOT-23, DFN

⚠️ Specifications may vary by variant—always refer to the official datasheet for exact limits.

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Typical Pin Description (SOT-23)

• VIN – Input supply voltage
• VOUT – Regulated output
• GND – Ground reference
• EN – Enable pin (device dependent)
• ADJ – Output voltage adjustment (adjustable versions)

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⭐ Advantages of MCP1792

• Handles high input voltages without pre-regulation
• Extremely low standby current
• Clean, low-noise output
• Small footprint and easy PCB design
• Reliable performance across wide temperature ranges

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Final Summary

The MCP1792 is a robust and efficient high-voltage LDO regulator ideal for applications requiring low quiescent current, wide input voltage tolerance, and clean output power. Its flexible voltage options and built-in protection features make it a strong choice for microcontroller power supplies, industrial sensors, and battery-powered electronics.

If your design prioritizes simplicity, reliability, and ultra-low standby power, the MCP1792 is an excellent solution.

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