The LP2950-33LPRE3 is a micropower low-dropout (LDO) voltage regulator providing a fixed 3.3V output at up to 100mA. With only 75\u00b5A quiescent current, 380mV dropout at full load, and 0.5% initial output accuracy, it is ideal for battery-powered applications in a through-hole TO-92 package from onsemi (originally TI\/National).<\/p>\n
| Output Voltage<\/td>\n | 3.3V (fixed)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| \u8f93\u51fa\u7535\u6d41<\/td>\n | 100 mA<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| Dropout Voltage (typ)<\/td>\n | 380 mV @ 100mA<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| \u9759\u6001\u7535\u6d41<\/td>\n | 75 \u00b5A (typ)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| \u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n | 3.7V to 30V<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| Output Accuracy<\/td>\n | \u00b10.5% (A suffix)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| \u5de5\u4f5c\u6e29\u5ea6<\/td>\n | -40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||
| \u5305\u88c5<\/td>\n | TO-92 (3 pins)<\/td>\n<\/tr>\n<\/table>\n\u7279\u70b9<\/h2>\n\u5e94\u7528<\/h2>\nProduct Overview The LP2950-33LPRE3 is a micropower low-dropout (LDO) voltage regulator providing a fixed 3.3V output at up to 100mA. With only 75\u00b5A quiescent current, 380mV dropout at full load, and 0.5% initial output accuracy, it is ideal for battery-powered applications in a through-hole TO-92 package from onsemi (originally TI\/National). Key Specifications Output Voltage 3.3V […]<\/p>\n","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":[144],"class_list":["post-3413","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-on"],"acf":{"brief_explanation":"3.3V 100mA LDO regulator, 75\u00b5A Iq, 380mV dropout, TO-92, \u00b10.5% accuracy","date_code":"","package_case":"TO-92 (Case 29) (4.5 x 4.0 mm cylindrical)","in_stock":8495,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/LP2950-D.PDF","price":"$0.236 @ 1ku","product_introduction":"The LP2950-33LPRE3 is a micropower low-dropout voltage regulator from onsemi that provides a fixed 3.3V output at up to 100mA. With an extremely low quiescent current of 75\u00b5A and dropout voltage of only 380mV at full load, it extends battery life in portable applications. The device features tight output accuracy of \u00b10.5%, excellent line and load regulation, and internal current\/thermal limiting protection. It requires only a 1\u00b5F output capacitor for stability and can accept input voltages up to 30V.","working_principle":"The LP2950-33LPRE3 operates through three main subsystems: (1) Bandgap Reference: A precision 1.235V bandgap reference provides the internal voltage standard, trimmed to achieve \u00b10.5% initial accuracy. A resistor divider scales this to the 3.3V output. (2) Pass Element: A PNP pass transistor allows low dropout operation (380mV at 100mA) since the input-to-output differential need only overcome the VCE(sat) of the transistor, unlike NPN-based regulators that require at least 1.5-2V headroom. (3) Protection Circuits: Internal current limiting protects against output short circuits, while thermal shutdown prevents damage from excessive junction temperature. The regulator is stable with just 1\u00b5F output capacitance due to careful internal compensation.","pin_description":"
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