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.

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.

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

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

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.

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)

(adsbygoogle = window.adsbygoogle || []).push({});

⭐ 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

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.

For Video Tutorial