{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCK126BG,LF","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TCK126BGLF","canonicalUrl":"https://icboms.com/toshiba/TCK126BGLF","factsUrl":"https://icboms.com/api/mcp/products/TCK126BG%2CLF","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TCK126BG,LF high-side load switch, P-channel, 1A output, 343mOhm Rds(on), slew-rate controlled, 1V-5.5V load, 4-WCSPG (0.65x0.65) package, Tape & Reel.","salesMarkdown":"## 1A high-side load switch in 0.65 mm CSP The TCK126BG,LF is a single-channel high-side load switch from Toshiba, built around a P-channel MOSFET with a typical on-resistance of 343 mOhm. The switch is controlled by a simple On/Off logic input (non-inverting, 1:1 ratio) and requires no external Vcc supply — the gate drive is derived from the load voltage itself. This makes it a drop-in power-rail gating component for battery-powered or low-standby-power designs. ## Slew-rate control and conduction loss The slew-rate controlled turn-on limits inrush current into capacitive loads, preventing upstream supply droop and reducing EMI. For a 1 µF bypass cap at the switch output, the controlled ramp keeps the peak inrush well below the 1 A current limit, which is useful when sequencing power domains on a PCB. Housed in a 4-bump WCSPG package measuring 0.65 mm x 0.65 mm (supplier device package 4-WCSPG), the TCK126BG,LF is suited for space-constrained layouts in smartphones, wearables, IoT modules, and other compact PCBs. The 0.4 mm typical bump pitch requires careful PCB land pattern design and solder paste stencil thickness control to avoid bridging. Standard moisture sensitivity level (MSL) precautions apply for the CSP package — verify the MSL rating on the latest Toshiba packing specification before opening the reel.","metaTitle":"Toshiba TCK126BG,LF Load Switch, 1A, 343mOhm, 4-WCSPG","metaDescription":"Toshiba TCK126BG,LF high-side load switch, 1A continuous output, 343mOhm Rds(on), slew-rate controlled, 1V-5.5V load range, 4-WCSPG package, ROHS3 compliant","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Slew Rate Controlled","Interface":"On/Off","Input Type":"Non-Inverting","Output Type":"P-Channel","Switch Type":"General Purpose","Rds On (Typ)":"343mOhm","Mounting Type":"Surface Mount","Package / Case":"4-XFBGA, CSPBGA","Voltage - Load":"1V ~ 5.5V","lifecycle_stage":"eol_hot","Number of Outputs":"1","Output Configuration":"High Side","Ratio - Input:Output":"1:1","Operating Temperature":"-40°C ~ 85°C (TA)","Current - Output (Max)":"1A","Supplier Device Package":"4-WCSPG (0.65x0.65)","Voltage - Supply (Vcc/Vdd)":"Not Required"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.47","stockQuantity":19,"priceTiers":[{"qty":1,"price":"$0.47000","currency":"USD"},{"qty":10,"price":"$0.38000","currency":"USD"},{"qty":25,"price":"$0.34760","currency":"USD"},{"qty":100,"price":"$0.25860","currency":"USD"},{"qty":250,"price":"$0.23432","currency":"USD"},{"qty":500,"price":"$0.19392","currency":"USD"},{"qty":1000,"price":"$0.14544","currency":"USD"},{"qty":2500,"price":"$0.13332","currency":"USD"},{"qty":5000,"price":"$0.12524","currency":"USD"},{"qty":10000,"price":"$0.11716","currency":"USD"},{"qty":25000,"price":"$0.10746","currency":"USD"},{"qty":50000,"price":"$0.10342","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d7465797be847c8029209cd9efcb844b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source for TCK126BG,LF?","answer":"The TCK128BG,LF and TCK127BG,LF are parametric peers with identical Rds(on) (343 mOhm), output current (1 A), load voltage range, package, and pinout. The key difference is that both peers add a Load Discharge feature — an internal pull-down resistor that discharges the output capacitance when the switch is turned off. If your application requires rapid output discharge (e.g., to prevent floating rails during power sequencing), the TCK128BG,LF or TCK127BG,LF is a drop-in replacement without board changes. For designs that do not need load discharge, the TCK126BG,LF is functionally equivalent."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TCK126BGLF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TCK126BGLF 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}}