{"product_id":"ap3211ktr-g1-gci-step-down-converter-sot23-6","title":"AP3211KTR-G1 GCI 1.5A Step-Down DC-DC Converter SOT23-6 – 4.5V-18V Input","description":"\u003ch2\u003eAP3211KTR-G1 (GCI) 1.4MHz 1.5A Step-Down DC-DC Converter in SOT23-6\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAP3211KTR-G1\u003c\/strong\u003e (marking \u003cstrong\u003eGCI\u003c\/strong\u003e) is a current-mode PWM step-down DC-DC converter running at a fixed \u003cstrong\u003e1.4MHz\u003c\/strong\u003e. In a small \u003cstrong\u003eSOT23-6\u003c\/strong\u003e package, it drives a \u003cstrong\u003e1.5A\u003c\/strong\u003e load with up to \u003cstrong\u003e92%\u003c\/strong\u003e efficiency and excellent line and load regulation, from a \u003cstrong\u003e4.5V to 18V\u003c\/strong\u003e input to an adjustable \u003cstrong\u003e0.81V to 15V\u003c\/strong\u003e output.\u003c\/p\u003e\n\u003cp\u003eThe device integrates a low on-resistance N-channel power MOSFET switch, so the buck stage needs only a few external parts. Current-mode control gives a fast transient response and cycle-by-cycle current limiting. Use it to replace a failed AP3211 on a control board or PCB assembly that derives a local low-voltage rail from a 12V supply.\u003c\/p\u003e\n \n\u003ch3\u003eBuilt-in Protections\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercurrent protection\u003c\/strong\u003e with cycle-by-cycle current limiting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal shutdown\u003c\/strong\u003e against overheating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUndervoltage lockout (UVLO)\u003c\/strong\u003e to keep the converter off when the input is too low.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvervoltage protection\u003c\/strong\u003e on the output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft-start\u003c\/strong\u003e to limit inrush current at power-up.\u003c\/li\u003e\n\u003c\/ul\u003e\n \n\u003ch3\u003eSigns of a Failed Step-Down Converter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMissing output voltage on the rail the converter supplies.\u003c\/li\u003e\n\u003cli\u003eOutput voltage too low, too high or unstable under load.\u003c\/li\u003e\n\u003cli\u003eChip running hot, or a visible crack or burn mark on the package.\u003c\/li\u003e\n\u003cli\u003eInput rail pulled down or shorted to ground at the converter.\u003c\/li\u003e\n\u003c\/ul\u003e\n \n\u003ch4\u003eAP3211KTR-G1 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;\"\u003eAP3211KTR-G1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eMarking Code\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eGCI\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;\"\u003eCurrent-mode PWM step-down DC-DC converter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eInput Voltage\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003e4.5V to 18V\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;\"\u003eAdjustable, 0.81V to 15V\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;\"\u003e1.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003e1.4MHz (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eEfficiency\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eUp to 92%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003ePower Switch\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eIntegrated low on-resistance N-channel MOSFET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eProtections\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eOCP, thermal shutdown, UVLO, OVP, soft-start\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;\"\u003eSOT23-6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eApplications\u003c\/td\u003e\n\u003ctd style=\"text-align:left;padding:6px 12px;\"\u003eLCD TV, digital photo frames, portable DVD, PCB assemblies\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 \n \n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the GCI marking mean?\u003c\/strong\u003e\u003cbr\u003eGCI is the marking code printed on the AP3211KTR-G1 package. Compare it with the chip on your board before replacing it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the output voltage set?\u003c\/strong\u003e\u003cbr\u003eThe output is adjustable from 0.81V to 15V with an external resistor divider. When you replace the chip, keep the original divider on the board and the output stays the same.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it run from a 12V supply?\u003c\/strong\u003e\u003cbr\u003eYes. The input range is 4.5V to 18V, which covers 5V and 12V supplies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo you sell it in volume?\u003c\/strong\u003e\u003cbr\u003eYes. Email us with the quantity you need and we will send a quote.\u003c\/p\u003e\n \n\u003ch3\u003eRelated Step-Down Converters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/sti3472-s42bck-600khz-step-down-converter-whatsminer-control-board-repair\"\u003eSTI3472 S42BCK 18V 2A Step-Down Converter SOT23-6 – Whatsminer Control Board\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/mp1653gtf-aucn-17v-3a-800khz-step-down-switch-mode-converter\"\u003eMP1653GTF AUCN 17V 3A 800kHz Step-Down Converter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/rt6212ahgj6f-step-down-dc-converter-avalon-a850-control-board\"\u003eRT6212AHGJ6F Step-Down DC-DC Converter – Avalon A850 Control Board\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/eta8120s2g-cmbc-dc-step-down-switching-regulator-whatsminer-cb6v10\"\u003eETA8120S2G CMBc Step-Down Regulator – Whatsminer CB6 V10 Control Board\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n \n\u003cp\u003eNeed AP3211KTR-G1 converters for a repair bench? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for volume pricing.\u003c\/p\u003e\n\u003cp\u003eWorldwide shipping from our Shenzhen warehouses.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":46454768861363,"sku":null,"price":0.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/ap3211ktr-g1-gci-step-down-converter-sot23-6-top.webp?v=1794452938","url":"https:\/\/lys-sz.com\/es\/products\/ap3211ktr-g1-gci-step-down-converter-sot23-6","provider":"LYS Shenzhen","version":"1.0","type":"link"}