{"id":5454,"date":"2026-06-10T02:14:34","date_gmt":"2026-06-10T02:14:34","guid":{"rendered":"https:\/\/materialparts.com\/tps3808g09dbvr\/"},"modified":"2026-06-10T02:14:34","modified_gmt":"2026-06-10T02:14:34","slug":"tps3808g09dbvr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tps3808g09dbvr\/","title":{"rendered":"TPS3808G09DBVR"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The TPS3808G09DBVR from Texas Instruments is an ultra-low quiescent current microprocessor supervisor with programmable delay in a 6-pin SOT-23 package. With 0.84V fixed threshold (for 0.9V rail monitoring), 0.5% threshold accuracy, 2.4uA typical Iq, and adjustable reset delay from 1.25ms to 10s, it is ideal for battery-powered systems monitoring low-voltage core rails.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Threshold Voltage<\/td>\n0.84V nominal (for 0.9V rail)<\/td>\n<\/tr>\n
Threshold Accuracy<\/td>\n0.5% typical (for VIT <= 3.3V)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.7V to 6.5V<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n2.4 uA typical<\/td>\n<\/tr>\n
Reset Delay<\/td>\n1.25ms to 10s (programmable via CT pin)<\/td>\n<\/tr>\n
CT Pin Options<\/td>\nOpen = 20ms; R to VDD = 300ms; C to GND = adjustable<\/td>\n<\/tr>\n
Manual Reset (MR)<\/td>\nYes (active low)<\/td>\n<\/tr>\n
RESET Output<\/td>\nOpen-drain, active low<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +125 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-6 (2.9 x 1.6 mm)<\/td>\n<\/tr>\n
Status<\/td>\n\u6d3b\u8dc3<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Ultra-low 2.4uA quiescent current<\/li>\n
  • 0.5% threshold accuracy<\/li>\n
  • 0.84V fixed threshold for 0.9V core monitoring<\/li>\n
  • Programmable reset delay: 1.25ms to 10s<\/li>\n
  • Three CT pin options: 20ms, 300ms, or custom<\/li>\n
  • Manual reset input<\/li>\n
  • Open-drain RESET output<\/li>\n
  • -40 to 125C operating range<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • DSP and microcontroller core voltage monitoring<\/li>\n
    • Battery-powered portable devices<\/li>\n
    • FPGA and ASIC applications<\/li>\n
    • Low-voltage rail supervision<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS3808G09DBVR from Texas Instruments is an ultra-low quiescent current microprocessor supervisor with programmable delay in a 6-pin SOT-23 package. With 0.84V fixed threshold (for 0.9V rail monitoring), 0.5% threshold accuracy, 2.4uA typical Iq, and adjustable reset delay from 1.25ms to 10s, it is ideal for battery-powered systems monitoring low-voltage core rails. Key […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[138],"class_list":["post-5454","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"0.84V supervisor, 2.4uA Iq, prog delay 1.25ms-10s, SOT-23-6","date_code":"","package_case":"SOT-23-6 (2.9 x 1.6 x 1.15 mm)","in_stock":11441,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps3808.pdf","price":"$0.65 @ 1ku","product_introduction":"The TPS3808G09DBVR from Texas Instruments is an ultra-low quiescent current programmable-delay supervisory circuit in a 6-pin SOT-23 package. The G09 denotes a fixed threshold voltage of 0.84V (designed for monitoring a 0.9V core rail), DBV denotes SOT-23-6 package, and R denotes tape and reel (3000 pcs\/reel). The device monitors the SENSE pin voltage and asserts the open-drain RESET output when it drops below 0.84V, or when the manual reset (MR) pin is pulled low. The 0.5% threshold accuracy for voltages up to 3.3V is achieved through an internal precision bandgap reference. The reset delay is highly flexible: leaving CT pin open sets 20ms, connecting CT to VDD via a resistor sets 300ms, or connecting CT to an external capacitor allows adjustment from 1.25ms to 10s. The 2.4uA typical quiescent current makes this device exceptionally well-suited for battery-powered applications where supply current must be minimized.","working_principle":"The TPS3808G09DBVR operates through three subsystems: (1) Voltage Monitoring: A precision comparator monitors the SENSE pin against the internal 0.84V reference. The bandgap reference is temperature-compensated to achieve 0.5% accuracy. When SENSE drops below the threshold (VIT- = 0.84V - hysteresis), RESET asserts. When SENSE rises above VIT+, the reset timer starts. (2) Reset Timer: The CT pin controls the reset delay. With CT open, an internal 20ms timer is used. Connecting CT to VDD through a resistor (typically 200kOhm) selects a 300ms delay. For custom delays, an external capacitor on CT sets the delay: td = CT(nF) x 5.5 (ms\/nF), ranging from 1.25ms (no capacitor) to 10s (with a large capacitor). The timer ensures the supervised processor has adequate time for power-on initialization before RESET de-asserts. (3) Manual Reset: The MR pin allows external reset triggering (active low). MR has an internal pullup and can be driven by a push-button, watchdog output, or another supervisor. MR and SENSE are logically ORed: either condition causes RESET assertion.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>RESET<\/td>Output<\/td>Open-drain reset output (active low)<\/td><\/tr>
      2<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      3<\/td>MR<\/td>Input<\/td>Manual reset (active low, internal pullup)<\/td><\/tr>
      4<\/td>CT<\/td>I\/O<\/td>Delay control (open=20ms, R to VDD=300ms, C to GND=custom)<\/td><\/tr>
      5<\/td>VDD<\/td>Power<\/td>Supply voltage (1.7-6.5V)<\/td><\/tr>
      6<\/td>SENSE<\/td>Input<\/td>Voltage sense input (0.84V threshold)<\/td><\/tr><\/table>","application_scenarios":"
      • FPGA core voltage monitoring at 0.9V with 0.84V threshold and 300ms reset delay (CT pin with resistor to VDD)<\/li>
      • Battery-powered MCU with 2.4uA supervisor Iq, monitoring 0.9V LDO output with custom 500ms delay via CT capacitor<\/li>
      • ASIC power-on reset for 0.9V core rail with manual reset push-button on MR pin and 20ms delay (CT open)<\/li>
      • Multi-rail system with TPS3808G09 monitoring 0.9V core and another TPS3808 variant monitoring 1.8V I\/O<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Threshold<\/th>Iq<\/th>Notes<\/th><\/tr>
        TPS3808G12DBVR<\/td>TI<\/td>1.08V<\/td>2.4uA<\/td>For 1.2V rail<\/td><\/tr>
        TPS3808G33DBVR<\/td>TI<\/td>2.93V<\/td>2.4uA<\/td>For 3.3V rail<\/td><\/tr>
        TPS3808G01DBVR<\/td>TI<\/td>Adjustable<\/td>2.4uA<\/td>SENSE pin adjustable down to 0.4V<\/td><\/tr>
        TPS3839K33DBVR<\/td>TI<\/td>2.93V<\/td>150nA<\/td>Nano-power, no MR\/CT<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=5454"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5454\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5454"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}