{"id":8041,"date":"2026-06-28T08:48:04","date_gmt":"2026-06-28T08:48:04","guid":{"rendered":"https:\/\/ic-vendor.com\/az1117ih-3-3trg1\/"},"modified":"2026-06-28T11:35:35","modified_gmt":"2026-06-28T11:35:35","slug":"az1117ih-3-3trg1","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/es\/az1117ih-3-3trg1\/","title":{"rendered":"AZ1117IH-3.3TRG1"},"content":{"rendered":"<h2>AZ1117IH-3.3TRG1 Overview<\/h2>\n<p>The AZ1117IH-3.3TRG1 is a 1A fixed 3.3V LDO linear regulator from Diodes Incorporated with maximum input voltage of 15V, 1.1V dropout at 1A, in a SOT-89 package, suitable for embedded system 3.3V power supply.<\/p>\n<h3>Key Features<\/h3>\n<ul>\n<li>Fixed output voltage: 3.3V<\/li>\n<li>Maximum output current: 1A<\/li>\n<li>Maximum input voltage: 15V<\/li>\n<li>Dropout voltage: 1.1V at 1A<\/li>\n<li>Line regulation: 0.2%<\/li>\n<li>Load regulation: 0.4%<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>AZ1117IH-3.3TRG1 Overview The AZ1117IH-3.3TRG1 is a 1A fixed 3.3V LDO linear regulator from Diodes Incorporated with maximum input voltage of 15V, 1.1V dropout at 1A, in a SOT-89 package, suitable for embedded system 3.3V power supply. Key Features Fixed output voltage: 3.3V Maximum output current: 1A Maximum input voltage: 15V Dropout voltage: 1.1V at 1A [&hellip;]<\/p>\n","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":[193],"class_list":["post-8041","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-diodes-inc"],"acf":{"brief_explanation":"1A LDO, 3.3V fixed, 1.3V dropout, SOT-223","date_code":"","package_case":"SOT-223 (6.50 x 3.50 x 1.60 mm)","in_stock":14994,"datasheet":"https:\/\/www.diodes.com\/assets\/Datasheets\/AZ1117I.pdf","price":"$0.12 @ 1ku","product_introduction":"The AZ1117IH-3.3TRG1 is a 1 A low-dropout linear regulator from Diodes Incorporated with a fixed 3.3 V output in an SOT-223 surface-mount package. It features a low dropout voltage of 1.1 V typical at 1 A load, input voltage range from 4.7 V to 15 V, and output voltage accuracy of plus or minus 1 percent at 25 C. The device includes over-current protection, 165 C thermal shutdown with automatic recovery, and safe operating area protection for the output transistor. With 70 dB PSRR at 120 Hz and only 6 mA quiescent current, it is pin-compatible with AMS1117 and LM1117-3.3 for direct drop-in replacement.","working_principle":"The AZ1117IH-3.3TRG1 uses a PNP pass transistor in a low-dropout configuration where the pass element operates in saturation rather than the linear region, reducing the minimum input-output differential (dropout voltage) to approximately 1.1 V at full 1 A load. An error amplifier compares a fraction of the output voltage (sensed through an internal resistor divider) with an internal bandgap reference voltage of approximately 1.25 V. Any deviation drives the PNP base current to restore regulation. The internal current limit circuit monitors the pass transistor current and reduces the base drive when the output current exceeds approximately 1.35 A, preventing damage during overload or short-circuit conditions. The thermal shutdown circuit monitors the die temperature and disables the pass transistor when junction temperature exceeds 165 C, automatically re-enabling the output once the temperature drops by 25 C of hysteresis. A 10 uF tantalum or 22 uF ceramic output capacitor is required for stability and to prevent oscillation.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Description<\/th><\/tr><tr><td>1<\/td><td>GND\/ADJ<\/td><td>Ground (fixed output version); connects to PCB ground plane<\/td><\/tr><tr><td>2<\/td><td>VOUT<\/td><td>Regulated 3.3 V output; connect output capacitor (10 uF min) to GND<\/td><\/tr><tr><td>3<\/td><td>VIN<\/td><td>Input supply (4.7 V to 15 V); connect input capacitor (10 uF) to GND<\/td><\/tr><tr><td>4<\/td><td>Tab\/VOUT<\/td><td>Heat sink tab; electrically connected to VOUT, solder to copper pour for thermal management<\/td><\/tr><\/table><p>Package: SOT-223-3 (TO-261-4). Dimensions: 6.5 x 3.5 x 1.6 mm. The tab is internally bonded to VOUT and serves as the primary thermal dissipation path.<\/p>","application_scenarios":"<ul><li><strong>3.3 V MCU Power<\/strong>: Regulating 5 V system rail to 3.3 V for microcontrollers, sensors, and wireless modules<\/li><li><strong>Post-Regulation<\/strong>: Clean 3.3 V rail after a switching preregulator for noise-sensitive analog circuits<\/li><li><strong>Embedded Systems<\/strong>: Point-of-load regulation in FPGA and CPLD boards requiring 3.3 V I\/O supply<\/li><li><strong>Battery-Powered Devices<\/strong>: 9 V or 12 V battery to 3.3 V conversion for portable instrumentation<\/li><li><strong>Drop-In Replacement<\/strong>: Pin-compatible upgrade for AMS1117-3.3 in existing PCB designs<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Vout<\/th><th>Iout<\/th><th>VDO<\/th><th>Package<\/th><th>Notes<\/th><\/tr><tr><td>AMS1117-3.3<\/td><td>Advanced Monolithic<\/td><td>3.3 V<\/td><td>1 A<\/td><td>1.1 V<\/td><td>SOT-223<\/td><td>Direct pin-compatible<\/td><\/tr><tr><td>LM1117MP-3.3<\/td><td>Texas Instruments<\/td><td>3.3 V<\/td><td>800 mA<\/td><td>1.1 V<\/td><td>SOT-223<\/td><td>Lower current variant<\/td><\/tr><tr><td>LD1117DT33CTR<\/td><td>STMicroelectronics<\/td><td>3.3 V<\/td><td>800 mA<\/td><td>1 V<\/td><td>DPAK<\/td><td>DPAK package alternative<\/td><\/tr><tr><td>NCP1117DT33T5G<\/td><td>onsemi<\/td><td>3.3 V<\/td><td>1 A<\/td><td>1.1 V<\/td><td>DPAK<\/td><td>Higher current, DPAK<\/td><\/tr><tr><td>TLV1117LV33DCYR<\/td><td>Texas Instruments<\/td><td>3.3 V<\/td><td>1 A<\/td><td>0.8 V<\/td><td>SOT-223<\/td><td>Lower dropout version<\/td><\/tr><\/table>\n<p>AZ1117IH-3.3TRG1 is a 1A LDO from Diodes Inc in SOT-223. The AMS1117-3.3 is the most popular budget alternative with identical pinout and 1A rating. The LD1117S33CTR from ST provides 800mA in the same SOT-223 package. The LM1117MP-3.3 from TI offers 800mA with lower 0.8V dropout. For higher current, the AZ1117EH-3.3TRG1 extends to 1.35A. The TLV1117LV33 from TI provides 1A with only 230mV dropout using ceramic capacitors. The AP1117E33G-13 from Diodes Inc offers 1A with reverse bias protection.<\/p>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/8041","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/comments?post=8041"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/8041\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/media?parent=8041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/categories?post=8041"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/tags?post=8041"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/chip_brand?post=8041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}