{"id":7177,"date":"2026-06-23T06:05:29","date_gmt":"2026-06-23T06:05:29","guid":{"rendered":"https:\/\/materialparts.com\/ka7924tu\/"},"modified":"2026-06-23T06:05:29","modified_gmt":"2026-06-23T06:05:29","slug":"ka7924tu","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/ka7924tu\/","title":{"rendered":"KA7924TU"},"content":{"rendered":"

Productos<\/h2>\n

The KA7924TU from onsemi is a 1A negative voltage regulator with -24V fixed output in a TO-220 package. Part of the KA79XX series, it provides stable negative supply rails with internal thermal shutdown and short-circuit protection for op-amp and analog circuits.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\n-24 V (fixed)<\/td>\n<\/tr>\n
Corriente de salida<\/td>\n1 A<\/td>\n<\/tr>\n
Input Voltage<\/td>\n-27 V to -38 V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n2 V (typical at 1A)<\/td>\n<\/tr>\n
Line Regulation<\/td>\n480 mV (max)<\/td>\n<\/tr>\n
Ripple Rejection<\/td>\n54 dB (typical at 120Hz)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0C to +125C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • -24V fixed output at 1A for analog negative supply rails<\/li>\n
  • Internal thermal shutdown and short-circuit protection<\/li>\n
  • Output transistor safe operating area compensation<\/li>\n
  • +\/-4% output voltage tolerance<\/li>\n
  • 60dB typical ripple rejection at 120Hz<\/li>\n
  • TO-220 through-hole package for heatsink mounting<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Op-amp dual supply negative rail generation<\/li>\n
    • Analog circuit -24V regulated supply<\/li>\n
    • Lab power supply negative output stages<\/li>\n
    • Industrial control negative voltage distribution<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The KA7924TU from onsemi is a 1A negative voltage regulator with -24V fixed output in a TO-220 package. Part of the KA79XX series, it provides stable negative supply rails with internal thermal shutdown and short-circuit protection for op-amp and analog circuits. Key Specifications Output Voltage -24 V (fixed) Output Current 1 A Input […]<\/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":[13,32],"tags":[],"chip_brand":[182],"class_list":["post-7177","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-onsemi"],"acf":{"brief_explanation":"-24V 1A negative voltage regulator, TO-220, thermal shutdown, short-circuit protection, KA79XX","date_code":"","package_case":"TO-220-3 (10.67 x 4.70 x 9.40 mm)","in_stock":5468,"datasheet":"https:\/\/media.digikey.com\/pdf\/Data%20Sheets\/ON%20Semiconductor%20PDFs\/KA79,LM79.pdf","price":"$0.45 @ 1ku","product_introduction":"The KA7924TU from onsemi (formerly Fairchild) is a 1A, -24V fixed output negative voltage regulator in a TO-220 through-hole package. Part of the KA79XX\/LM79XX family of three-terminal negative regulators, it provides a stable -24V output from input voltages between -27V and -38V. The device employs internal current limiting, thermal shutdown, and safe operating area compensation to protect against overload and fault conditions. The +\/-4% output voltage tolerance ensures reliable negative rail regulation for operational amplifier and analog circuits requiring symmetrical dual supplies. The 54dB typical ripple rejection at 120Hz effectively attenuates power supply ripple. The 2V typical dropout voltage at 1A provides adequate headroom for regulation. The TO-220 package enables easy heatsink mounting for power dissipation up to 15W with adequate cooling. The device is suitable for any application requiring a stable negative voltage rail from a higher-magnitude unregulated negative supply.","working_principle":"The KA7924TU uses a series-pass transistor topology for negative voltage regulation. (1) Reference: An internal bandgap reference sets the -24V output voltage. The reference is temperature-compensated and laser-trimmed during manufacturing for +\/-4% accuracy. (2) Error Amplifier: A differential error amplifier compares a fraction of the output voltage to the internal reference. The amplifier drives the base of the series-pass NPN transistor to maintain regulation. (3) Pass Transistor: A Darlington NPN transistor passes current from the negative input to the output. The 2V dropout voltage is the sum of the VCE(sat) and the reference headroom requirements. (4) Protection: Current limiting protects against output short circuits by reducing the pass transistor base drive when current exceeds approximately 2.2A peak. Thermal shutdown disables the output when junction temperature exceeds approximately 150C. Safe operating area compensation reduces current limit at high input-output differentials. (5) Ripple Rejection: The error amplifier's high loop gain provides 54-60dB of ripple rejection at 120Hz by actively canceling input ripple at the output.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground (common reference)<\/td><\/tr>
      2<\/td>Input<\/td>Input<\/td>Negative unregulated input (-27V to -38V)<\/td><\/tr>
      3<\/td>Output<\/td>Output<\/td>Regulated -24V output<\/td><\/tr><\/table>","application_scenarios":"
      • Op-amp dual supply negative rail at -24V with 1A output<\/li>
      • Analog circuit -24V regulated supply with 54dB ripple rejection<\/li>
      • Lab power supply negative output stages with thermal protection<\/li>
      • Industrial control negative voltage distribution in TO-220 package<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM7924CT<\/td>TO-220<\/td>Direct equivalent<\/td><\/tr>
        onsemi<\/td>MC7924CTG<\/td>TO-220<\/td>onsemi MC series equivalent<\/td><\/tr>
        ST<\/td>L7924CV<\/td>TO-220<\/td>ST equivalent<\/td><\/tr>
        onsemi<\/td>KA7918TU<\/td>TO-220<\/td>-18V version, same family<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=7177"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7177\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=7177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=7177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=7177"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=7177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}