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LM73605RNPR Datasheet(PDF) 1 Page - Texas Instruments |
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LM73605RNPR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 53 page  SW PVIN PGND CBOOT VCC BIAS EN AGND FB VIN COUT CBOOT CIN CVCC VOUT RFBT RFBB L SYNC/ MODE RT SS/TRK PGOOD Copyright © 2017, Texas Instruments Incorporated Load Current (A) 0.001 0.01 0.02 0.05 0.1 0.2 0.5 1 2 3 4 56 50 55 60 65 70 75 80 85 90 95 100 Eff_ VIN = 12 V VIN = 24 V Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM73605, LM73606 SNVSAH5 – SEPTEMBER 2017 LM73605/LM73606 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter 1 1 Features 1 • Synchronous Rectification • Wettable Flanks QFN Package (WQFN) • Low Quiescent Current – 0.8 µA in Shutdown (typical) – 15 µA in Active Mode with No Load (typical) • Wide Voltage Conversion Range: – tON_MIN = 60 ns (typical) – tOFF_MIN = 70 ns (typical) • Low MOSFET ON-Resistance: – RDS_ON_HS = 53 mΩ (typical) – RDS_ON_LS = 31 mΩ (typical) • External Bias Input to Improve Efficiency • Pin-Selectable Auto Mode or Forced PWM Operation • Adjustable Frequency Range: 350 kHz to 2.2 MHz • Synchronizable to External Clock • Internal Compensation • Power-Good Flag • Precision Enable to Program System UVLO • Flexible Soft-Start Features: – Start-up into Pre-Biased Load – Fixed or Adjustable Soft-Start Time – Output Voltage Tracking • Cycle-by-Cycle Current Limiting • Short-Circuit Protection With Hiccup Mode • Thermal Shutdown Protection • Create a Custom Design With the WEBENCH® Power Designer using LM73605 or LM73606 Simplified Schematic 2 Applications • Industrial Distributed Power Applications • Telecommunications Systems • General-Purpose Wide VIN Regulation 3 Description The LM73605/LM73606 family of devices are easy- to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605) or 6 A (LM73606) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605/LM73606 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle- by-cycle current limiting, and hiccup short-circuit protection. The LM73605 and LM73606 devices are pin-to-pin compatible for easy current scaling. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM73605 WQFN (30) Wettable Flanks 6.00 mm × 4.00 mm LM73606 (1) For all available packages, see the orderable addendum at the end of the data sheet. Efficiency vs Load Current VOUT = 5 V, fSW = 500 kHz, Auto Mode |
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