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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LT7200SAVPBF Datenblatt(PDF) 1 Page - Analog Devices |
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LT7200SAVPBF Datenblatt(HTML) 1 Page - Analog Devices |
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1 / 35 page  Data Sheet LT7200S Quad 18V, ±5A Synchronous Monolithic Step-Down Regulator Rev 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT One Analog Wa y, Wilmington, MA 01887 -2356, U.S.A. Tel: 781.329.47 00 ©2022 Analog Devices, Inc. Al l rights rese rve d. FEATURES Silent Switcher 2 Architecture: Ultralow EMI Eliminated PCB Layout Sensitivity Internal Bypass Caps Reduce Radiated EMI Wide SVIN Range: 2.9V to 18V; PVIN: 1.5V to 18V Wide VOUT Range: 0.5V to 0.9VIN Output Current: ±5A/ Channel; up to ±20A Accurate Reference: 0.5V ± 0.8% Over Temp High Efficiency: Up to 96% 12ns Min on-time: True 12V to 1V at 2MHz Programmable Multi-phase, Synchronizable Frequency: 400kHz to 3MHz Current Mode: Excellent Line and Load Transient Response User Selectable Discontinuous Mode® (DCM) or Forced Continuous Mode (FCM) Operation Flexible Individual Internal Compensation for Ease of Use; External for Fast Transient Accurate Individual 1.2V EN/ Run Pin Threshold Individual Output Tracking and Soft-Start Individual Power Good Status Output Low Profile 5mm x 6mm 48-Lead LQFN Package APPLICATIONS Distributed Power Systems, Server Power Point of Load Supply for ASIC, FPGA, Etc. DESCRIPTION The LT®7200S is a quad-channel, high efficiency monolithic synchronous buck regulator, capable of sinking/sourcing 5A to the load per channel. Its multi- channel flexibility is ideal for powering complex systems with the compact layout. The operating supply voltage range is from 2.9V to 18V, making it suitable for various supply applications from a 3.3V, 5V to 12V supply. The operating frequency is programmable from 400kHz to 3MHz with an external resistor, or externally synchronized for switching noise sensitive applications. The unique “phase lockable, controlled on-time, constant frequency, current mode” architecture, is ideal for high frequency, high step- down applications while demanding fast transient responses. The high frequency capability allows smaller surface mount inductors and capacitors. The MODE/SYNC pin selects low noise Forced Continuous Mode (FCM) or high efficiency Discontinuous Mode (DCM). The PHMODE pin allows to run out-of-phase among 4 channels, which lessens the required input and output capacitors. The LT7200S uses second generation Silent Switcher technology with integrated bypass capacitors to deliver a highly efficient solution at high frequencies with excellent EMI performance. TYPICAL APPLICATION Figure 1. 1.2V/5A, 1.8V/5A, 3.3V/5A, 5V/5A (1MHz) Buck Regulator Figure 2. Efficiency and Power Loss (1MHz) VOUT1 1.2V/5A VOUT2 1.8V/5A VOUT3 3.3V/5A VOUT4 5V/5A 2.9V TO 18V 5.5V TO 18V PVIN3 RUN3 PVIN4 RUN4 RT 10µF ×2 10µF ×2 47µF ×2 4.7µF PHMODE GND 100kΩ 14kΩ 10kΩ 0.6µH LT7200S SW1 PVIN1 SVIN RUN1 PVIN2 RUN2 MODE/SYNC ITH1 ITH2 ITH3 ITH4 INTVCC FB1 TRACK1 PGOOD1 47µF ×2 47µF ×2 47µF ×2 26.1kΩ 10kΩ 0.6µH SW2 FB2 TRACK2 PGOOD2 56.2kΩ 10kΩ 1.5µH SW3 FB3 TRACK3 PGOOD3 90.9kΩ 10kΩ 1.5µH SW4 FB4 TRACK4 PGOOD4 |
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