{"id":8507,"date":"2026-06-29T03:05:00","date_gmt":"2026-06-29T03:05:00","guid":{"rendered":"https:\/\/materialparts.com\/tps2557qdrbtq1\/"},"modified":"2026-06-29T06:28:14","modified_gmt":"2026-06-29T06:28:14","slug":"tps2557qdrbtq1","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps2557qdrbtq1\/","title":{"rendered":"TPS2557QDRBTQ1"},"content":{"rendered":"

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

The TPS2557QDRBTQ1 from Texas Instruments is an AEC-Q100-qualified automotive-grade eFuse (smart power switch) with adjustable current limit from 0.5A to 5A in an 8-pin VSON (2.5 x 4 mm) package. It provides overcurrent protection, overtemperature shutdown, reverse-current blocking, and accurate current monitoring output for automotive and industrial applications operating from 2.5V to 6.5V.<\/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\n\n
\u0646\u0637\u0627\u0642 \u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.5V to 6.5V<\/td>\n<\/tr>\n
Adjustable Current Limit<\/td>\n0.5A to 5A (external resistor)<\/td>\n<\/tr>\n
RDS(ON)<\/td>\n33 mOhm typ (HS + LS)<\/td>\n<\/tr>\n
Current Monitor Output<\/td>\nILM pin (proportional to load current)<\/td>\n<\/tr>\n
Reverse-Current Blocking<\/td>\nYes (auto or controlled)<\/td>\n<\/tr>\n
Overcurrent Response<\/td>\nCurrent limiting with auto-retry<\/td>\n<\/tr>\n
Overtemperature Shutdown<\/td>\nYes (with hysteresis)<\/td>\n<\/tr>\n
\u062a\u0645\u0643\u064a\u0646 \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\nActive high<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40\u00b0C to +125\u00b0C (Q1 automotive)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nVSON-8 (2.5 x 4.0 x 0.9 mm)<\/td>\n<\/tr>\n
AEC-Q100<\/td>\nYes (Grade 1)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • AEC-Q100 Grade 1 qualified for automotive applications<\/li>\n
  • Adjustable current limit from 0.5A to 5A via external resistor<\/li>\n
  • 33 mOhm RDS(ON) for low voltage drop and power dissipation<\/li>\n
  • Accurate current monitor output (ILM) proportional to load current<\/li>\n
  • Reverse-current blocking prevents current flow from output to input<\/li>\n
  • Overtemperature shutdown with thermal hysteresis auto-recovery<\/li>\n
  • Active-high enable input for power sequencing<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Automotive USB port protection<\/li>\n
    • In-vehicle infotainment power distribution<\/li>\n
    • ADAS sensor power rails<\/li>\n
    • Industrial hot-swap and inrush current limiting<\/li>\n
    • Battery-powered portable equipment<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS2557QDRBTQ1 from Texas Instruments is an AEC-Q100-qualified automotive-grade eFuse (smart power switch) with adjustable current limit from 0.5A to 5A in an 8-pin VSON (2.5 x 4 mm) package. It provides overcurrent protection, overtemperature shutdown, reverse-current blocking, and accurate current monitoring output for automotive and industrial applications operating from 2.5V to 6.5V. […]<\/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":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-8507","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"Automotive eFuse, 2.5-6.5V, 0.5-5A adj current limit, rev-current block, VSON-8, AEC-Q100","date_code":"","package_case":"VSON-8 (2.5 x 4.0 x 0.9 mm)","in_stock":3774,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps2557-q1.pdf","price":"$1.20 @ 1ku","product_introduction":"The Texas Instruments TPS2557QDRBTQ1 is an AEC-Q100 Grade 1 qualified automotive smart power switch (eFuse) providing precision adjustable current limiting from 0.5A to 5A with integrated reverse-current blocking. The device operates from a 2.5V to 6.5V input range and features a low 33 mOhm RDS(ON) power MOSFET for minimal voltage drop and power dissipation. The ILM pin provides an analog output voltage proportional to the load current, enabling real-time current monitoring without an external sense resistor. When the load current exceeds the programmed threshold, the device limits the current and eventually enters thermal shutdown if the overload persists. Reverse-current blocking prevents current flow from the output back to the input during fault conditions, protecting upstream circuitry. The VSON-8 package with exposed thermal pad provides efficient heat dissipation for the 5A current rating.","working_principle":"The TPS2557QDRBTQ1 integrates a high-side N-channel power MOSFET with an internal charge pump for gate drive, current sensing, and protection circuits. An external resistor (RILM) connected from the ILM pin to GND sets the current limit threshold: Ilim = K \/ RILM, where K is an internal constant. An internal sense amplifier measures the load current through the MOSFET by sensing the voltage across a precision internal resistor. When the load current exceeds the set threshold, a regulation loop limits the MOSFET gate voltage to maintain constant current, clamping the output voltage. The ILM pin also provides a voltage proportional to the measured current (VILM = Iload x RILM x K2), allowing the host MCU to monitor real-time power consumption. The reverse-current comparator monitors the voltage difference between IN and OUT; when VOUT > VIN by approximately 15 mV, the MOSFET turns off within 1 microsecond, blocking reverse current. The thermal shutdown circuit disables the MOSFET when the junction temperature exceeds 140\u00b0C (typical) and automatically recovers when the temperature drops below the hysteresis threshold.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>OUT<\/td>Power output to load<\/td><\/tr>
      2<\/td>OUT<\/td>Power output to load<\/td><\/tr>
      3<\/td>ILM<\/td>Current limit set \/ Current monitor output<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>EN<\/td>Enable input (active high)<\/td><\/tr>
      6<\/td>FAULT<\/td>Fault indicator output (open-drain, active low)<\/td><\/tr>
      7<\/td>IN<\/td>Power input from supply<\/td><\/tr>
      8<\/td>IN<\/td>Power input from supply<\/td><\/tr>
      Pad<\/td>PowerPAD<\/td>Thermal pad (connect to GND plane)<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive USB<\/b>: 5V USB port protection with 2.1A current limit, reverse-current blocking, and fault reporting for in-vehicle infotainment USB charging ports<\/li>
      • ADAS Sensor Rail<\/b>: 3.3V rail protection for radar and camera sensors with ILM current monitoring detecting sensor fault conditions<\/li>
      • Industrial Hot-Swap<\/b>: Inrush current limiting for plug-in industrial modules with adjustable current limit protecting the backplane supply<\/li>
      • Battery Equipment<\/b>: 5A current-limited power switch for portable test equipment with real-time current monitoring via ILM ADC input<\/li>
      • Power Sequencing<\/b>: EN input controlled by system power management IC for controlled turn-on\/turn-off of subsystem power rails<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Ilim (A)<\/th>Vin (V)<\/th>Package<\/th><\/tr>
        TPS2556QDRBRQ1<\/td>TI<\/td>0.5-5<\/td>2.5-6.5<\/td>VSON-8<\/td><\/tr>
        TPS259525DSBR<\/td>TI<\/td>0.1-5<\/td>2.7-23<\/td>VSON-10<\/td><\/tr>
        LTC4365CTS8<\/td>ADI<\/td>UV\/OV<\/td>2.5-36<\/td>TSOT-23-8<\/td><\/tr>
        MAX14572ETT+<\/td>ADI<\/td>0.5-3<\/td>2.7-5.5<\/td>TDFN-6<\/td><\/tr>
        TCS241CPR<\/td>TI<\/td>0.5-5<\/td>2.5-18<\/td>VSSOP-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8507","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=8507"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8507\/revisions"}],"predecessor-version":[{"id":8508,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8507\/revisions\/8508"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=8507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=8507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=8507"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8507"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}