{"product_id":"spx5205m5l18tr-spx5205m5-ldo-voltage-regulator","title":"SPX5205M5-L-1-8\/TR SPX5205M5 R1B DD8F 1.8V LDO Voltage Regulator IC","description":"\u003ch2\u003eSPX5205M5-L-1-8\/TR (R1B \/ DD8F) 1.8V LDO Voltage Regulator – SOT-23-5 Hashboard Repair\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSPX5205M5-L-1-8\/TR\u003c\/strong\u003e (board markings \u003cstrong\u003eR1B\u003c\/strong\u003e or \u003cstrong\u003eDD8F\u003c\/strong\u003e) is a \u003cstrong\u003e150mA low-noise LDO regulator\u003c\/strong\u003e in a \u003cstrong\u003eSOT-23-5\u003c\/strong\u003e SMD package, configured for a fixed \u003cstrong\u003e1.8V output\u003c\/strong\u003e. It is used on the auxiliary 1.8V bias rails of various ASIC miner hashboards, where a clean, low-noise reference is needed for analog blocks. Failure mode is usually output-stuck-at-rail or thermal shutdown after the small package overheats.\u003c\/p\u003e\n\u003ch3\u003eWhere the SPX5205M5 Sits on the Board\u003c\/h3\u003e\n\u003cp\u003eThe 1.8V rail it produces typically feeds \u003cstrong\u003elevel translators, sensor reference inputs, or oscillator buffers\u003c\/strong\u003e on the hashboard. Because it is a linear LDO, the rail has very low ripple — important for clock-domain stability. When this regulator fails, the dependent block goes silent and the controller logs an initialisation error or the chip-count drops by exactly the chips fed by that domain.\u003c\/p\u003e\n\u003ch3\u003eReplacement Procedure\u003c\/h3\u003e\n\u003cp\u003ePre-heat the board to 130-150°C. Remove the failed SPX5205M5 with hot air at 320°C using a small precision nozzle, taking care not to disturb the surrounding 0402 passives. Clean the pads with flux and braid. Place the new chip with pin 1 aligned to the silkscreen mark, reflow at 320°C for 8-12 seconds. Bench-test the 1.8V rail with the board powered through a current-limited supply, then verify chip count via the controller fixture before reassembly.\u003c\/p\u003e\n\u003ch4\u003eSPX5205M5-L-1-8\/TR Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSPX5205M5-L-1-8\/TR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eBoard Markings\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eR1B \/ DD8F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eLow-noise LDO regulator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e1.8V (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eOutput Current\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e150mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eDropout Voltage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e~250mV at 150mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePackage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSOT-23-5 SMD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePSRR\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eHigh (low-noise grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eUse Case\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e1.8V bias for level translators, oscillator buffers, sensor inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRelated 1.8V LDO Regulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/ln1134a182mr-4vk4-ldo-voltage-regulator-antminer-hashboard\"\u003eLN1134A182MR 4VK4 1.8V LDO – Antminer Hashboard\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sgm2036s-1-8v-ldo-avalon-1446-1466\"\u003eSGM2036S 1.8V LDO – Avalon 1446 \/ 1466\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/me6214c18m5g-p4re-innosilicon-t1-hash-board-1-8v-ldo-regulator\"\u003eME6214C18M5G 1.8V LDO – Innosilicon T1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/rs323618yf5-lb18-rs3236-cmos-ldo-whatsminer-control-board-repair\"\u003eRS3236-1.8YF5 1.8V LDO – Whatsminer Control Board\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eStocking SPX5205M5 for a hashboard repair line? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for tray-quantity pricing. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":41725016178867,"sku":null,"price":0.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/SPX5205M5-L-1-8_TR-SPX5205M5-R1B-DD8F-1.8V-LDO-Voltage-Regulator-IC-Positive-Adjustable-Hash-board-chip.webp?v=1745756810","url":"https:\/\/lys-sz.com\/products\/spx5205m5l18tr-spx5205m5-ldo-voltage-regulator","provider":"LYS Shenzhen","version":"1.0","type":"link"}