{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3315AACBZ-R7","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3315AACBZ-R7","canonicalUrl":"https://icboms.com/analog-devices/LTC3315AACBZ-R7","factsUrl":"https://icboms.com/api/mcp/products/LTC3315AACBZ-R7","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC3315AACBZ-R7, Automotive AEC-Q100, dual 2A step-down buck converter, adjustable output, 2.25-5.5V input, 2MHz switching, synchronous rectification, 16-WLCSP 1.64x1.64mm, Tape & Reel.","salesMarkdown":"## Package and integration story The LTC3315AACBZ-R7 packs two independent 2 A buck converters into a 16-bump WLCSP measuring 1.64x1.64 mm — the smallest footprint for a dual 2 A rail in the automotive temperature range. The 0.4 mm pitch WLCSP demands a controlled solder-paste stencil and a reflow profile matched to the 0.3 mm bump height; the exposed backside is the die itself, so the board's top-layer copper plane under the package acts as the primary heat spreader. Each channel delivers 2 A continuous from a 2.25 V to 5.5 V input rail, covering 3.3 V and 5 V system buses with margin for automotive cold-crank dips down to 2.25 V. The 2 MHz fixed switching frequency keeps the inductor in the 0.47 µH to 2.2 µH range — small enough for a 0603 footprint — but the loop compensation is internal, so the output capacitor ESR and ESL must stay within the datasheet's stable region to avoid sub-harmonic oscillation at heavy load. ## AEC-Q100 grade and the under-hood thermal profile Qualified to AEC-Q100 Grade 1 with a junction temperature range of -40°C to 125°C — this is the full under-hood envelope. The 125°C TJ limit means the part can sit next to an engine block or inside a transmission ECU without derating the output current, provided the board's thermal impedance keeps the die below that ceiling. The synchronous rectifier (integrated low-side FET) reduces the external component count but shifts the thermal dissipation into the package; at 2 A per channel with a 3.3 V to 1.8 V conversion, the junction rise is roughly 40°C above ambient in still air, leaving 85°C ambient headroom before hitting the 125°C limit. ## Layout checklist for the WLCSP footprint The 16-WLCSP with 0.4 mm pitch and 0.3 mm bump diameter requires a solder-mask-defined pad of 0.22 mm diameter on the board. Via-in-pad is not recommended — the solder wicks into the via and starves the bump joint. Instead, route the output and input traces on the top layer to the nearest via array, keeping the high-current paths (VIN, SW, VOUT) under 5 mm before dropping to an inner layer. The two channels share a common VIN pin; the input decoupling capacitor (10 µF X7R per channel) must sit within 2 mm of the VIN-GND bump pair to keep the input ripple below 50 mV at 2 A load step. The adjustable output voltage is set by a resistor divider from VOUT to the FB pin. The FB pin threshold is 0.5 V (the minimum output voltage), so for a 1.8 V output the top resistor is 130 kΩ and the bottom is 49.9 kΩ — standard E96 values. The FB trace should be kept under 10 mm and shielded from the SW node by a ground pour to avoid noise injection into the feedback loop.","metaTitle":"LTC3315AACBZ-R7 Dual 2A Buck, AEC-Q100, 16-WLCSP","metaDescription":"Analog Devices LTC3315AACBZ-R7 dual 2A step-down buck converter, AEC-Q100 qualified, 2.25-5.5V input, 2MHz switching, 16-WLCSP. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"16-UFBGA, WLCSP","lifecycle_stage":"eol_hot","Current - Output":"2A, 2A","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"2.25V","Voltage - Output (Max)":"5.5V","Supplier Device Package":"16-WLCSP (1.64x1.64)","Voltage - Output (Min/Fixed)":"0.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.76","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.76000","currency":"USD"},{"qty":10,"price":"$2.47600","currency":"USD"},{"qty":25,"price":"$2.34080","currency":"USD"},{"qty":100,"price":"$2.02860","currency":"USD"},{"qty":250,"price":"$1.92456","currency":"USD"},{"qty":3000,"price":"$1.38360","currency":"USD"},{"qty":6000,"price":"$1.33158","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a4233d5bf5262a05134ec8b315ff83d4.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3315AACBZ-R7","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC3315AACBZ-R7 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}