{"id":10692,"date":"2026-07-20T10:11:40","date_gmt":"2026-07-20T10:11:40","guid":{"rendered":"https:\/\/ic-vendor.com\/lm43601pwpr\/"},"modified":"2026-07-20T10:11:40","modified_gmt":"2026-07-20T10:11:40","slug":"lm43601pwpr","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/lm43601pwpr\/","title":{"rendered":"LM43601PWPR"},"content":{"rendered":"

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

The LM43601PWPR is a 3.5V to 36V, 1A synchronous step-down converter from Texas Instruments, packaged in a 16-pin HTSSOP (PWP) with an exposed thermal pad. It features a wide input range with 42V transient capability, peak-current-mode control, and an ultra-low 33 \u00b5A quiescent current. The device supports DCM and PFM modes for high light-load efficiency and is pin-to-pin compatible with the LM43600\/2\/3 and LM46000\/1\/2 family members.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u529f\u80fd<\/td>\nSynchronous Step-Down Converter<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n3.5V to 36V (42V transient)<\/td>\n<\/tr>\n
Output Voltage<\/td>\n1V to 28V (adjustable)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n1A<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n200 kHz to 2.2 MHz (default 500 kHz)<\/td>\n<\/tr>\n
\u63a7\u5236\u6a21\u5f0f<\/td>\nPeak Current Mode<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n33 \u00b5A (typical)<\/td>\n<\/tr>\n
\u7279\u70b9<\/td>\nPower-Good, Precision Enable, Output Tracking<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nHTSSOP-16 (6.6 \u00d7 5.1 mm with exposed pad)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Wide 3.5V to 36V input with 42V transient withstand<\/li>\n
  • Ultra-low 33 \u00b5A IQ for battery-powered and always-on applications<\/li>\n
  • DCM and PFM mode for high light-load efficiency<\/li>\n
  • Pin-to-pin compatible family (LM43600\/2\/3, LM46000\/1\/2)<\/li>\n
  • Integrated internal soft start (4.1 ms, extendable) and output tracking<\/li>\n
  • Hiccup-mode short circuit protection with power-good flag<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive battery-powered DC-DC conversion<\/li>\n
    • Industrial 24V bus point-of-load regulators<\/li>\n
    • Battery-powered instrumentation and metering<\/li>\n
    • Telecom 12V\/24V power supply modules<\/li>\n
    • Ruggedized outdoor equipment power systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM43601PWPR is a 3.5V to 36V, 1A synchronous step-down converter from Texas Instruments, packaged in a 16-pin HTSSOP (PWP) with an exposed thermal pad. It features a wide input range with 42V transient capability, peak-current-mode control, and an ultra-low 33 \u00b5A quiescent current. The device supports DCM and PFM modes for high […]<\/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":[2033],"chip_brand":[138],"class_list":["post-10692","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","tag-lm43601pwpr","chip_brand-ti"],"acf":{"brief_explanation":"3.5-36V 1A synchronous buck, 33\u00b5A IQ, peak current mode, HTSSOP-16","date_code":"","package_case":"HTSSOP-16 (6.6 \u00d7 5.1 \u00d7 1.2 mm, exposed pad)","in_stock":8618,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm43601.pdf","price":"$1.85 @ 1ku","product_introduction":"The LM43601 is a synchronous step-down converter optimized for wide-input-range applications from 3.5V to 36V, with 42V transient capability for automotive load dump events. The device uses peak-current-mode control with integrated high-side and low-side MOSFETs to deliver up to 1A of continuous output current. With a quiescent current of only 33 \u00b5A, it is well-suited for always-on and battery-powered systems. The switching frequency is adjustable from 200 kHz to 2.2 MHz and defaults to 500 kHz, allowing optimization of efficiency versus solution size. The device is part of a pin-to-pin compatible family that includes 0.5A, 1A, 2A, and 3A variants.","working_principle":"The LM43601 employs peak-current-mode control with a fixed-frequency oscillator that sets the switching period. At the start of each cycle, the high-side NMOS switch is turned on, causing the inductor current to ramp up. When the sensed peak current reaches the error amplifier output level, the high-side switch turns off and the low-side synchronous rectifier turns on, allowing the inductor current to ramp down. The error amplifier compares a fraction of the output voltage with the internal reference and adjusts the peak current threshold to regulate the output. In DCM\/PFM mode at light loads, the device skips switching pulses to maintain efficiency by reducing gate drive and switching losses. The precision enable pin doubles as a programmable UVLO threshold using an external voltage divider.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>BOOT<\/td>Power<\/td>Bootstrap capacitor \u2014 connect 0.1\u00b5F to SW<\/td><\/tr>
      2<\/td>VIN<\/td>Power<\/td>Input supply (3.5-36V)<\/td><\/tr>
      3<\/td>EN<\/td>Input<\/td>Enable \/ UVLO programming \u2014 float for auto-startup<\/td><\/tr>
      4<\/td>SS\/TRK<\/td>Output<\/td>Soft start \/ tracking \u2014 external cap to GND<\/td><\/tr>
      5<\/td>RT<\/td>Input<\/td>Frequency set resistor \u2014 float for 500 kHz default<\/td><\/tr>
      6<\/td>PGOOD<\/td>Output<\/td>Power-good open-drain output<\/td><\/tr>
      7<\/td>FB<\/td>Input<\/td>Feedback \u2014 connect resistor divider from output<\/td><\/tr>
      8<\/td>COMP<\/td>Output<\/td>Error amplifier output \u2014 compensation network<\/td><\/tr>
      9-10<\/td>GND<\/td>Power<\/td>Signal ground<\/td><\/tr>
      11-12<\/td>PGND<\/td>Power<\/td>Power ground (exposed pad)<\/td><\/tr>
      13-14<\/td>SW<\/td>Output<\/td>Switch node \u2014 connect to inductor<\/td><\/tr>
      15-16<\/td>PGND<\/td>Power<\/td>Power ground<\/td><\/tr>
      EP<\/td>Thermal Pad<\/td>Power<\/td>Exposed pad \u2014 connect to PGND plane<\/td><\/tr><\/table>","application_scenarios":"
      • 24V to 5V industrial bus POL regulator with 42V transient protection<\/li>
      • Automotive 12V battery to 3.3V always-on system supply<\/li>
      • Smart meter battery-to-system DC-DC with 33\u00b5A IQ<\/li>
      • Telecom 48V-to-12V intermediate bus post-regulation<\/li>
      • Ruggedized outdoor LED signage power supply<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM43602PWPR<\/td>HTSSOP-16<\/td>2A variant, pin-compatible<\/td><\/tr>
        TI<\/td>LM46001PWPR<\/td>HTSSOP-16<\/td>3.5-60V, 1A, higher voltage<\/td><\/tr>
        Monolithic Power<\/td>MP8759<\/td>QFN-16<\/td>2A, 18V input buck<\/td><\/tr>
        Richtek<\/td>RT6202<\/td>SOT-23-6<\/td>2A, 18V, smaller package<\/td><\/tr>
        Infineon<\/td>TLE6254-3G<\/td>PG-DSO-14<\/td>Automotive 40V buck<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=10692"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10692\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10692"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}