{"id":6647,"date":"2026-06-18T16:00:52","date_gmt":"2026-06-18T16:00:52","guid":{"rendered":"https:\/\/materialparts.com\/tps62745dsst\/"},"modified":"2026-06-18T16:00:52","modified_gmt":"2026-06-18T16:00:52","slug":"tps62745dsst","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps62745dsst\/","title":{"rendered":"TPS62745DSST"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The TPS62745DSST from Texas Instruments is an ultra-low quiescent current buck converter with 350nA Iq and up to 95% efficiency. Operating from 2.2-5.5V input, it delivers 300mA output at programmable voltages. It is the ideal power converter for energy-harvesting and long-life battery IoT devices. Packaged in WSON-8 (2x2mm).<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627<\/td>\nBuck (step-down) DC-DC<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.2V to 5.5V<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n300mA<\/td>\n<\/tr>\n
Quiescent Current (Iq)<\/td>\n350nA (operating)<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 95%<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n1.2V to 3.3V (pin-selectable, 100mV steps)<\/td>\n<\/tr>\n
\u062a\u0631\u062f\u062f \u0627\u0644\u062a\u062d\u0648\u064a\u0644<\/td>\n2MHz<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nWSON-8 (2.0×2.0mm)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • 350nA operating quiescent current<\/li>\n
  • Pin-selectable output voltage (no feedback resistors)<\/li>\n
  • 300mA output current<\/li>\n
  • Up to 95% efficiency at 10mA load<\/li>\n
  • 2MHz switching for tiny inductor<\/li>\n
  • Pass-through mode for lowest dropout<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Energy harvesting power conversion<\/li>\n
    • BLE and IoT sensor nodes<\/li>\n
    • Long-life coin cell applications<\/li>\n
    • Wearable electronics<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS62745DSST from Texas Instruments is an ultra-low quiescent current buck converter with 350nA Iq and up to 95% efficiency. Operating from 2.2-5.5V input, it delivers 300mA output at programmable voltages. It is the ideal power converter for energy-harvesting and long-life battery IoT devices. Packaged in WSON-8 (2x2mm). Key Specifications Topology Buck (step-down) […]<\/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":[31,13],"tags":[],"chip_brand":[],"class_list":["post-6647","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics"],"acf":{"brief_explanation":"Ultra-low Iq buck converter, 350nA, 300mA, pin-selectable VOUT, WSON-8","date_code":"","package_case":"WSON-8 (2.0x2.0mm)","in_stock":11167,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps62745.pdf","price":"$1.20 @ 1ku","product_introduction":"The TPS62745DSST from Texas Instruments is an ultra-low quiescent current step-down converter designed for battery-powered IoT and energy-harvesting applications. With only 350nA operating quiescent current, it draws virtually no power during idle periods, extending coin-cell battery life from months to years. The output voltage is pin-selectable from 1.2V to 3.3V in 100mV steps using the VSEL pins, eliminating feedback resistors and their leakage current. The converter achieves up to 95% efficiency even at 10mA load, a remarkable feat that traditional buck converters cannot match at light loads. The 2MHz switching frequency allows use of a tiny 1uH inductor in a 2x2mm footprint. A pass-through mode connects input directly to output with only 40mOhm resistance when the output is close to the target, achieving near-zero dropout for maximum energy extraction from batteries.","working_principle":"The TPS62745DSST uses a hysteretic control scheme optimized for ultra-low quiescent current. In discontinuous conduction mode (DCM), the converter delivers a fixed energy packet on each switching cycle, then enters a low-power sleep state. The output voltage is monitored by a nano-power comparator; when VOUT drops below the lower threshold, a new switching cycle begins. This pulse-frequency modulation (PFM) approach maintains high efficiency at light loads because the switching frequency decreases with load current. At 350nA Iq, the converter's own power consumption is negligible: a CR2032 coin cell (225mAh) would last over 73 years at 350nA drain. The VSEL pins (4 pins) select the output voltage by connecting to VDD or GND in binary combinations, covering 1.2V to 3.3V in 100mV steps. The pass-through mode activates when VIN is close to the target VOUT, bypassing the converter entirely with a 40mOhm MOSFET switch.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>SW<\/td>Switch node (connect to inductor)<\/td><\/tr>
      2<\/td>VIN<\/td>Input supply (2.2-5.5V)<\/td><\/tr>
      3<\/td>GND<\/td>Ground (exposed pad)<\/td><\/tr>
      4<\/td>VSEL0<\/td>Voltage select bit 0 (connect to VDD or GND)<\/td><\/tr>
      5<\/td>VSEL1<\/td>Voltage select bit 1<\/td><\/tr>
      6<\/td>VSEL2<\/td>Voltage select bit 2<\/td><\/tr>
      7<\/td>VSEL3<\/td>Voltage select bit 3<\/td><\/tr>
      8<\/td>VOUT<\/td>Output voltage (connect to output capacitor)<\/td><\/tr><\/table>","application_scenarios":"
      • Energy harvesting converter with 350nA Iq for solar\/thermoelectric powered IoT<\/li>
      • BLE sensor node with coin cell battery life extended by 95% efficiency at 10mA<\/li>
      • Wearable electronics with 2x2mm footprint and pin-selectable 1.8-3.3V output<\/li>
      • CR2032-powered remote sensor with years of battery life at microamp average current<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        TPS62746<\/td>TI<\/td>Same but fixed 3.3V output, fewer VSEL pins<\/td><\/tr>
        MAX20361<\/td>ADI<\/td>250nA Iq, Buck+LDO, energy harvesting optimized<\/td><\/tr>
        BD70528<\/td>ROHM<\/td>400nA Iq, Buck+Charger, NB-IoT optimized<\/td><\/tr>
        LTC3337<\/td>ADI<\/td>300nA Iq, nanopower buck, energy harvesting<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=6647"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6647\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6647"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6647"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}