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LM5122-Q1 Datasheet(PDF) 1 Page - Texas Instruments |
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LM5122-Q1 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 51 page  VCC LM5122 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 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. LM5122, LM5122-Q1 SNVS954G – FEBRUARY 2013 – REVISED MAY 2016 LM5122/-Q1 Wide-Input Synchronous Boost Controller With Multiple Phase Capability 1 1 Features 1 • AEC-Q100 Qualified with the following results: – Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature Range – Device HBM ESD Classification Level 2 – Device CDM ESD Classification Level C6 • Maximum Input Voltage : 65 V • Min Input Voltage : 3 V (4.5 V for startup) • Output Voltage up to 100 V • Bypass (VOUT = VIN) Operation • 1.2 V Reference with ±1.0% Accuracy • Free-Run and Synchronizable Switching to 1 MHz • Peak Current Mode Control • Robust 3 A Integrated Gate Drivers • Adaptive Dead-Time Control • Optional Diode Emulation Mode • Programmable Cycle-by-Cycle Current Limit • Hiccup Mode Overload Protection • Programmable Line UVLO • Programmable Soft-Start • Thermal Shutdown Protection • Low Shutdown Quiescent Current: 9 μA • Programmable Slope Compensation • Programmable Skip Cycle Mode Reduces Standby Power • Allows External VCC Supply • Inductor DCR Current Sensing Capability • Multiphase Capability • Thermally Enhanced 20-Pin HTSSOP 2 Applications • 12-V, 24-V, and 48-V Power Systems • Automotive Start-Stop • Audio Power Supply • High Current Boost Power Supply 3 Description The LM5122 is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed- forward, cycle-by-cycle current limiting and ease of loop compensation. The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved by two robust N- channel MOSFET gate drivers with adaptive dead- time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions. An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180º phase shifted clock output enables easy multi- phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM5122 HTSSOP (20) 6.50 mm × 4.40 mm LM5122-Q1 (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Application Diagram |
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