LT1964ES5-SD: Low Noise, Low Dropout Negative Voltage Regulator

The LT1964ES5-SD is a high-performance, low dropout negative voltage regulator designed by Linear Technology. This regulator is capable of delivering up to 200mA of continuous output current with a low dropout voltage of only 340mV at full load. It is optimized for use in battery-powered systems and applications where low noise and high output accuracy are critical.

With its wide input voltage range from -1.9V to -20V, the LT1964ES5-SD offers great flexibility for various design requirements. Its low quiescent current of 30μA (operating) and less than 3μA in shutdown mode makes it an ideal choice for portable and battery-operated equipment where power efficiency is a key concern.

The LT1964ES5-SD boasts excellent transient response and stability with low ESR (Equivalent Series Resistance) capacitors, including ceramic types, which are smaller, more reliable, and have better shock and vibration resistance than tantalum capacitors. This regulator is stable with output capacitors as low as 3.3μF, further reducing the space and cost of the overall power supply design.

One of the key features of the LT1964ES5-SD is its very low noise output, which is typically 30μV RMS over a 10Hz to 100kHz bandwidth without the need for an additional noise bypass capacitor. This makes it suitable for sensitive RF supply applications and precision instrumentation where noise performance is critical.

The device also includes a range of protection features such as overcurrent and overtemperature protection, ensuring reliable operation under extreme conditions. Its small footprint is achieved through the use of the SOT-23 package, which is ideal for space-constrained applications.

Overall, the LT1964ES5-SD from Linear Technology is a robust and reliable choice for designers looking for a high-quality negative voltage regulator that combines low noise, low dropout, and high efficiency, with the added benefits of a small package size and ease of use.