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LM25122QPWPRQ1 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM25122QPWPRQ1 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 47 page VCC LM25122 CSP SYNCIN/RT RES SS UVLO VIN SYNCOUT AGND BST MODE PGND SLOPE COMP FB HO LO SW + OPT VOUT CSN VIN Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM25122-Q1 SNVSAF0A – DECEMBER 2015 – REVISED DECEMBER 2015 LM25122-Q1 Wide-Input Synchronous Boost Controller With Multiple Phase Capability 1 Features 2 Applications 1 • AEC-Q100 Grade 1 (TA = –40°C to 125°C) • 12-V, 24-V, and 48-V Power Systems • Maximum Input Voltage : 42 V • Automotive Start-Stop • Min Input Voltage : 3 V (4.5 V for startup) • Audio Power Supply • Output Voltage up to 50 V • High Current Boost Power Supply • Bypass (VOUT = VIN) Operation 3 Description • 1.2 V Reference with ±1.0% Accuracy The LM25122 is a multiphase capable synchronous • Free-Run and Synchronizable Switching to 600 boost controller intended for high-efficiency kHz synchronous boost regulator applications. The control • Peak Current Mode Control method is based upon peak current mode control. Current mode control provides inherent line feed- • Robust 3 A Integrated Gate Drivers forward, cycle-by-cycle current limiting and ease of • Adaptive Dead-Time Control loop compensation. • Optional Diode Emulation Mode The switching frequency is programmable up to 600 • Programmable Cycle-by-Cycle Current Limit kHz. Higher efficiency is achieved by two robust N- • Hiccup Mode Overload Protection channel MOSFET gate drivers with adaptive dead- time control. A user-selectable diode emulation mode • Programmable Line UVLO also enables discontinuous mode operation for • Programmable Soft-Start improved efficiency at light load conditions. • Thermal Shutdown Protection An internal charge pump allows 100% duty cycle for • Low Shutdown Quiescent Current: 9 μA high-side synchronous switch (Bypass operation). A • Programmable Slope Compensation 180º phase shifted clock output enables easy multi- phase interleaved configuration. Additional features • Programmable Skip Cycle Mode Reduces include thermal shutdown, frequency synchronization, Standby Power hiccup mode current limit and adjustable line • Allows External VCC Supply undervoltage lockout. • Inductor DCR Current Sensing Capability • Multiphase Capability Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) • Thermally Enhanced 20-Pin HTSSOP LM25122-Q1 HTSSOP (20) 6.50 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Application Diagram 1 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. |
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