SGM2211-5.0XN5G/TR 20V, 500mA, Low Noise, Low Dropout Linear Regulator

Overview of SGMICRO SGM2211-5.0XN5G/TR

The SGM2211-5.0XN5G/TR is a high-performance, low-dropout regulator (LDO) designed to provide stable, low-noise voltage regulation in a compact 5-pin SOT-23 package. It operates with an input voltage range of 2.0V to 6.0V and provides a fixed output of 5.0V with a typical output current capability of 500mA. The device features a low dropout voltage, which is critical in maintaining voltage stability in battery-powered applications or systems with strict power constraints.

Key features include:

• Output voltage: 5.0V ±2% tolerance

• Low dropout voltage: 40mV at 100mA load, ensuring efficient power delivery even under low voltage conditions

• Low quiescent current: 40µA (typical), which extends battery life in portable devices

• Low noise: 30µVRMS (typical), ideal for sensitive analog circuitry

• Thermal shutdown and current limiting protection to enhance device reliability

Overview of LT1761IS5-5#TRPBF

The LT1761IS5-5#TRPBF from Linear Technology (now part of Analog Devices) is also a low-dropout regulator, designed for precision applications. This device provides a fixed 5.0V output with an output current capability of up to 500mA. It operates with an input voltage range of 3.0V to 20V, making it more suitable for systems that require a wider input voltage range.

Key features include:

• Output voltage: 5.0V ±1% tolerance

• Dropout voltage: 300mV at 500mA load, which is higher compared to the SGM2211

• Low quiescent current: 30µA (typical), which is in the same range as the SGM2211

• Low noise: 30µVRMS (typical), similar to the SGM2211, making it suitable for noise-sensitive applications

• Thermal shutdown and current limiting protection for enhanced reliability

Comparative Analysis: Dropout Voltage

A key advantage of the SGM2211-5.0XN5G/TR is its extremely low dropout voltage of only 40mV at 100mA load, which significantly outperforms the LT1761IS5-5#TRPBF, which has a typical dropout voltage of 300mV at 500mA. This means that the SGM2211 can maintain stable operation even under low input voltage conditions, which is especially crucial for portable and battery-powered applications where conserving battery life and maximizing efficiency is essential.

Comparative Analysis: Quiescent Current

Both the SGM2211-5.0XN5G/TR and the LT1761IS5-5#TRPBF feature low quiescent currents (typically 40µA and 30µA, respectively), but the SGM2211 stands out with a slightly higher quiescent current that allows for better load regulation and transient response at low output currents. This makes the SGM2211 an excellent choice for applications where extremely low quiescent current is not the only concern, but maintaining a steady output under varying load conditions is crucial.

Comparative Analysis: Output Noise

Both regulators offer similar low noise performance at around 30µVRMS, which is ideal for noise-sensitive applications such as audio equipment, precision measurement systems, or high-performance analog circuits. The SGM2211’s low-noise characteristics are competitive with the LT1761, and with its lower dropout voltage, the SGM2211 can provide cleaner power for such applications even in low input voltage situations.

Comparative Analysis: Thermal Performance and Protection Features

Both devices feature thermal shutdown and current limiting protection, ensuring robust operation in the event of overload or excessive temperature conditions. However, the SGM2211-5.0XN5G/TR has the added benefit of a more compact package (5-pin SOT-23) compared to the LT1761’s 5-pin SOIC-8 package, making it easier to integrate into tight spaces while still offering the same level of protection.

Comparative Analysis: Package and Size

The SGM2211-5.0XN5G/TR comes in a small 5-pin SOT-23 package, which is an advantage when space-saving is a key design criterion. The LT1761IS5-5#TRPBF, on the other hand, comes in a larger 5-pin SOIC-8 package, requiring more board space. For applications where board real estate is limited, the SGM2211’s compact form factor can provide a distinct advantage.

Conclusion: SGM2211-5.0XN5G/TR Advantages

In conclusion, while the LT1761IS5-5#TRPBF is a reliable and widely-used low-dropout regulator, the SGMICRO SGM2211-5.0XN5G/TR offers several advantages:

• Significantly lower dropout voltage (40mV vs. 300mV), enabling better performance in low-voltage applications

• Smaller package size (5-pin SOT-23) for space-constrained designs

• Lower dropout voltage leads to higher efficiency and extended battery life in portable devices

• Competitive low-noise performance and excellent protection features at a more compact size

Thus, the SGM2211-5.0XN5G/TR is ideal for applications where low dropout voltage, small form factor, and efficiency are key priorities, while still offering high performance in terms of noise reduction and load regulation.