The LM7915CT\/NOPB from TI is a -15V fixed negative voltage regulator capable of 1A output in a TO-220 package for dual-rail analog power supplies.<\/p>\n
| \u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n | TO-220-3<\/td>\n<\/tr>\n<\/table>\n\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\nProduct Overview The LM7915CT\/NOPB from TI is a -15V fixed negative voltage regulator capable of 1A output in a TO-220 package for dual-rail analog power supplies. Key Specifications Package TO-220-3 Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Automotive electronics<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[138],"class_list":["post-5586","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"-15V 1A negative voltage regulator, TO-220","date_code":"","package_case":"TO-220-3","in_stock":7881,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm7915.pdf","price":"$0.85 @ 1ku","product_introduction":"The LM7915CT\/NOPB from TI is a -15V fixed negative voltage regulator capable of 1A output in a TO-220 package for dual-rail analog power supplies.","working_principle":"The LM7915CT\/NOPB is a -15V 1A negative voltage regulator from Texas Instruments in TO-220, the negative complement to the LM7815 positive regulator. It regulates a negative output voltage using a series-pass NPN transistor in a common-emitter configuration controlled by a feedback loop. The internal architecture: (1) A bandgap voltage reference provides a stable -7V reference; (2) A resistor divider scales the output to match the reference; (3) An error amplifier drives the series-pass transistor. The dropout voltage is 2V at 1A (input must be at least 2V more negative than -15V). The quiescent current is 3mA typical. The regulator includes current limiting at 2.1A, thermal shutdown at 150C, and safe operating area protection. Note the pinout differs from the 78xx: pin 1 is GND, pin 2 is IN, pin 3 is OUT (vs 78xx: IN, GND, OUT). The TO-220 tab is connected to GND (not OUT as on some 78xx), allowing direct heatsink mounting without insulator when the heatsink is grounded. For dual-rail supplies, the LM7915 is paired with an LM7815: the positive rail uses LM7815 with GND connected to the common rail, and the negative rail uses LM7915 with GND also at the common rail. The -CT\/NOPB suffix specifies TO-220, lead-free. Applications include: op-amp dual-rail power supplies, audio amplifier bias rails, and industrial analog circuits requiring +\/-15V.","pin_description":"
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