LT1762EMS8#PBF

LT1762 is a micropower low-noise positive low dropout linear regulator with 150mA maximum output current capacity. EMS8 stands for industrial temperature grade and 8-lead MSOP compact surface mount package. #PBF refers to lead-free tape-and-reel packaging for continuous automated SMT mass production. This variant features adjustable output voltage configuration.

This low-power LDO is tailored for noise-sensitive analog circuits and long-duration battery-operated devices. The input voltage acceptance range covers 1.8V to 20V, adapting to various battery packs and unregulated DC input power sources.

It delivers up to 150mA continuous load current, with typical dropout voltage kept at 270mV under full-load operation. The internal 1.22V precision reference allows users to set output voltage continuously from 1.22V up to 20V via external resistor divider networks.

Key noise performance stands out: a tiny bypass capacitor connected to the dedicated reference pin reduces total output noise down to 20μV RMS within the 10Hz to 100kHz frequency bandwidth, effectively cleaning power rail ripple for precision amplifiers, ADCs and RF modules.

Normal operating quiescent current is only 25μA, which will not increase even under dropout status, greatly slowing battery consumption during standby periods. When the shutdown pin is triggered, device leakage current drops below 1μA for ultra-low idle power loss.

The chip maintains stable output with merely a 2.2μF minimum output capacitor, compatible with multilayer ceramic, tantalum and aluminum electrolytic capacitors without mandatory series resistance. Built-in comprehensive safety mechanisms include reverse input battery protection, reverse current blocking, cycle-by-cycle overcurrent limiting and thermal shutdown with hysteresis to prevent permanent damage during short-circuit, overheating and abnormal wiring conditions. The power supply rejection ratio retains high values across low and medium frequencies to suppress switching power supply interference thoroughly.

Encapsulated in 8-pin miniaturized MSOP plastic housing, the compact footprint saves considerable PCB space for handheld instruments, portable data loggers and miniature analog signal processing boards. Moisture Sensitivity Level is MSL1, so no waiting period is required for reflow soldering once the vacuum sealed package is opened. Standard continuous tape reel feeding enables seamless operation with automatic component placement machines throughout large-scale electronic manufacturing workflows.

The junction operating temperature range spans -40°C to +125°C, supporting reliable long-term operation in industrial field monitoring equipment, laboratory precision measuring instruments, portable medical diagnostic devices and wireless sensor nodes under drastic ambient temperature changes. Produced with full lead-free manufacturing processes, the component complies with global RoHS environmental regulations. Its high level of chip integration cuts down external passive component count and simplifies ultra-clean low-power positive power rail design.

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