The TPS54360DDAR from Texas Instruments is a 60-V, 3.5-A step-down DC-DC converter with an integrated 92-m\u03a9 high-side MOSFET in an 8-pin HSOIC PowerPAD package. It features a wide 4.5-V to 60-V input range (65-V abs max), adjustable output from 0.8 V to 58.8 V, current-mode control with 100-kHz to 2.5-MHz programmable switching frequency, Eco-mode pulse skipping for 146-\u00b5A quiescent current at light load, external clock synchronization, adjustable UVLO, internal soft start, and comprehensive protection (cycle-by-cycle current limit, thermal shutdown, overvoltage, frequency foldback). Target applications include 12-V\/24-V\/48-V industrial, automotive, and communications power systems.<\/p>","protected":false},"excerpt":{"rendered":"
The TPS54360DDAR from Texas Instruments is a 60-V, 3.5-A step-down DC-DC converter with an integrated 92-m\u03a9 high-side MOSFET in an 8-pin HSOIC PowerPAD package. It features a wide 4.5-V to 60-V input range (65-V abs max), adjustable output from 0.8 V to 58.8 V, current-mode control with 100-kHz to 2.5-MHz programmable switching frequency, Eco-mode pulse […]<\/p>\n","protected":false},"author":2,"featured_media":2891,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-2030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"60V 3.5A Buck DC-DC, 92m\u03a9 MOSFET, 146\u00b5A Iq Eco-mode, 100kHz-2.5MHz, adjustable UVLO, HSOIC-8 PowerPAD, -40~125\u00b0C","date_code":"","package_case":"HSOIC-8 (DDA) with PowerPAD (4.9 x 6.0 x 1.5 mm, 1.27mm pitch)","in_stock":8000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps54360.pdf","price":"$1.85 (1K+ pcs)","product_introduction":"The TPS54360DDAR is a 60-V, 3.5-A step-down DC-DC converter from Texas Instruments with an integrated high-side N-channel MOSFET (92 m\u03a9). It is designed for 12-V, 24-V, and 48-V industrial, automotive, and communications power systems where a compact, efficient, wide-input-range buck converter is needed.\n\nThe device uses peak current-mode control, which simplifies external loop compensation and provides predictable transient response. The switching frequency is programmable from 100 kHz to 2.5 MHz via a single external resistor on the RT\/CLK pin, allowing designers to trade off efficiency versus inductor size. An external clock can also drive the RT\/CLK pin for synchronization with other converters in the system.\n\nAt light loads, the Eco-mode pulse-skipping operation reduces the quiescent current to 146 \u00b5A (typical), significantly extending battery life in always-on or standby applications. In shutdown (EN pin low), the supply current drops to 2 \u00b5A. The internal BOOT recharge FET maintains low dropout at light loads without requiring an external bootstrap capacitor refresh.\n\nThe adjustable UVLO threshold (default 4.3 V rising) can be raised using two external resistors on the EN pin with built-in hysteresis current (3.4 \u00b5A typ), enabling precise power-up sequencing. Internal soft start (1.5 ms at 500 kHz) prevents inrush current and output overshoot.\n\nProtection features include accurate cycle-by-cycle current limit (5.5 A typ), thermal shutdown (176\u00b0C), output overvoltage protection, and frequency foldback during overload. The device survives automotive load dump pulses up to 65 V per ISO 7637.\n\nThe HSOIC-8 PowerPAD package provides a low junction-to-case thermal resistance (3.6\u00b0C\/W \u03b8JCbot) and is rated for operation from -40\u00b0C to 125\u00b0C ambient (150\u00b0C junction). The PowerPAD must be soldered to the PCB ground plane for proper thermal performance.","working_principle":"**Power Stage and Current-Mode Control:** The TPS54360 integrates a high-side N-channel MOSFET (92 m\u03a9) and operates as a peak current-mode buck converter. The error amplifier compares the FB pin voltage with the 0.8-V internal reference and drives the COMP pin. The PWM comparator compares the COMP voltage with the sensed switch current to determine the on-time. Current-mode control provides inherent line rejection, cycle-by-cycle current limiting, and simple Type-II compensation.\n\n**Eco-mode (Pulse Skip):** When the load current drops below the pulse-skip threshold, the converter enters Eco-mode. The high-side MOSFET stops switching and the output coasts down until FB falls below the reference, at which point a single pulse is delivered. This eliminates continuous switching losses, reducing quiescent current to 146 \u00b5A. The BOOT recharge FET ensures the bootstrap capacitor stays charged during skip mode.\n\n**Frequency and Synchronization:** The switching frequency is set by an external resistor from RT\/CLK to GND (200 k\u03a9 = 500 kHz). An external clock on RT\/CLK overrides the resistor setting; the internal PLL locks within 78 \u00b5s. Frequency foldback reduces the switching frequency to 1\/4 of the set value during overcurrent, reducing MOSFET thermal stress.\n\n**UVLO and Enable:** The EN pin serves dual purpose: pulling it below 1.2 V shuts down the converter (2 \u00b5A Iq), while external resistors set a custom UVLO threshold. The internal 3.4-\u00b5A hysteresis current source creates programmable UVLO hysteresis without a third resistor.\n\n**Protection:** Cycle-by-cycle current limit (5.5 A) protects the MOSFET. Thermal shutdown at 176\u00b0C with 12\u00b0C hysteresis. OVP on the FB pin triggers if output exceeds 109% of set point. Frequency foldback activates during sustained overcurrent.","pin_description":"
| Pin<\/th> | Name<\/th> | Type<\/th> | Description<\/th><\/tr><\/thead> | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | BOOT<\/td> | I\/O<\/td> | Bootstrap capacitor connection; connect 0.1\u00b5F ceramic from BOOT to SW; internal BOOT recharge FET keeps capacitor charged during skip mode<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 2<\/td> | VIN<\/td> | P<\/td> | Input supply pin (4.5-60V); connect to input bypass capacitors (0.1\u00b5F ceramic + 10\u00b5F ceramic placed close to pin); internal UVLO threshold 4.3V<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 3<\/td> | EN<\/td> | I<\/td> | Enable and UVLO adjust; float or pull above 1.2V to enable; pull below 1.2V to shutdown; add two resistors from VIN to EN to GND to set custom UVLO threshold with built-in 3.4\u00b5A hysteresis<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 4<\/td> | RT\/CLK<\/td> | I<\/td> | Switching frequency set resistor or external clock input; connect resistor to GND (200k\u03a9=500kHz, range 100kHz-2.5MHz); external clock overrides resistor; do not leave floating<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 5<\/td> | FB<\/td> | I<\/td> | Feedback input; connect to output voltage divider (Rtop from VOUT to FB, Rbot from FB to GND); Vref=0.8V; divider sets output voltage; place divider close to pin<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 6<\/td> | COMP<\/td> | I\/O<\/td> | Error amplifier output; connect Type-II compensation network (Rcomp, Ccomp, Chf) from COMP to GND; compensation sets loop bandwidth and phase margin<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 7<\/td> | GND<\/td> | P<\/td> | Signal and power ground; connect to PCB ground plane; PowerPAD on package bottom must be soldered to ground plane for thermal dissipation<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 8<\/td> | SW<\/td> | O<\/td> | Switch node; connects to output inductor; high-frequency switching node (keep copper area minimal to reduce EMI); absolute max -1V to 65V<\/td><\/tr> | ||||||||||||||||||||||||||||||
| Pad<\/td> | PowerPAD<\/td> | P<\/td> | Thermal pad; must be soldered to PCB ground plane; \u03b8JCbot=3.6\u00b0C\/W; critical for thermal performance at high power dissipation<\/td><\/tr><\/tbody><\/table>","application_scenarios":"
|