The L78L08ACZ is a positive voltage linear regulator from STMicroelectronics with fixed 8V output, maximum 100mA output current, in a TO-92 through-hole package, suitable for low-power analog circuit power supply.<\/p>\n
L78L08ACZ Overview The L78L08ACZ is a positive voltage linear regulator from STMicroelectronics with fixed 8V output, maximum 100mA output current, in a TO-92 through-hole package, suitable for low-power analog circuit power supply. Key Features Fixed output voltage: 8V Maximum output current: 100mA Maximum input voltage: 30V Dropout voltage: 1.7V Line regulation: 200mV Load regulation: 100mV<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[142],"class_list":["post-8024","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-st"],"acf":{"brief_explanation":"100mA LDO, 8V fixed, TO-92","date_code":"","package_case":"TO-92 (5.20 x 4.20 mm, through-hole)","in_stock":11400,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/l78l.pdf","price":"$0.35 @ 1ku","product_introduction":"The L78L08ACZ is a 100 mA positive voltage regulator from STMicroelectronics in a TO-92 through-hole package, providing a fixed 8 V output with 4 percent tolerance over the 0 C to 125 C temperature range. It features internal current limiting and thermal shutdown for robustness, requires no external components, and operates from an input voltage of 10 V to 30 V. With a quiescent current of 3 mA typical and output noise voltage of 40 uV typical, it serves as a compact and reliable local regulation solution for low-current analog and logic circuits.","working_principle":"The L78L08ACZ is a series-pass linear voltage regulator that maintains a constant 8 V output by continuously adjusting the conduction of an internal series pass transistor. A bandgap voltage reference generates a stable internal reference voltage, which is compared against a divided-down sample of the output voltage by an error amplifier. The error amplifier drives the base of the series pass transistor to maintain the output at the regulation setpoint. If the output current exceeds the internal limit (typically 140 mA), the current limit circuit reduces the drive to the pass transistor, preventing damage. If the junction temperature exceeds approximately 150 C, the thermal shutdown circuit turns off the pass transistor until the device cools below the recovery threshold. The dropout voltage is approximately 1.7 V at full load (100 mA), meaning the input must be at least 9.7 V to maintain 8 V regulation. A small bypass capacitor (0.33 uF) on the input is recommended when the regulator is located far from the supply filter, and a 0.01 uF output capacitor improves transient response.","pin_description":"
| Pin<\/th> | Name<\/th> | Description<\/th><\/tr> | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | OUT<\/td> | Regulated 8 V output; connect 0.01 uF capacitor to GND for stability<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 2<\/td> | GND<\/td> | Ground reference<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 3<\/td> | IN<\/td> | Unregulated input voltage (10 V to 30 V); connect 0.33 uF capacitor to GND if far from source<\/td><\/tr><\/table> Package: TO-92 (3-pin, flat face). Dimensions: 4.58 x 3.86 mm body. The A suffix denotes 4% output voltage tolerance. The C suffix denotes 0 to 125 C operating temperature range. The Z suffix denotes TO-92 package.<\/p>","application_scenarios":"
|