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FDS8880 датащи(PDF) 1 Page - Analog Devices |
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FDS8880 датащи(HTML) 1 Page - Analog Devices |
1 / 28 page 20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver Data Sheet ADP2381 FEATURES Input voltage: 4.5 V to 20 V Integrated 44 mΩ high-side MOSFET 0.6 V ± 1% reference voltage over temperature Continuous output current: 6 A Programmable switching frequency: 250 kHz to 1.4 MHz Synchronizes to external clock: 250 kHz to 1.4 MHz 180° out-of-phase synchronization Programmable UVLO Power-good output External compensation Internal soft start with external adjustable option Startup into a precharged output Supported by ADIsimPower design tool APPLICATIONS Communication infrastructure Networking and servers Industrial and instrumentation Healthcare and medical Intermediate power rail conversion DC-to-dc point of load application TYPICAL APPLICATIONS CIRCUIT Figure 1. Figure 2. ADP2381 Efficiency vs. Output Current, VIN = 12 V, fSW = 250 kHz GENERAL DESCRIPTION The ADP2381 is a current mode control, synchronous, step- down, dc-to-dc regulator. It integrates a 44 mΩ power MOSFET and a low-side driver to provide a high efficiency solution. The ADP2381 runs from an input voltage of 4.5 V to 20 V and can deliver 6 A of output current. The output voltage can be adjusted to 0.6 V to 90% of the input voltage. The switching frequency of the ADP2381 can be programmed from 250 kHz to 1.4 MHz or fixed at 290 kHz or 550 kHz. The synchronization function allows the switching frequency to be synchronized to an external clock to minimize system noise. External compensation and an adjustable soft start provide design flexibility. The power-good output provides simple and reliable power sequencing. Additional features include programmable undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD). The ADP2381 operates over the −40°C to +125°C junction temperature range and is available in a 16-lead TSSOP_EP package. ADP2381 1 PVIN PVIN UVLO PGOOD RT SYNC EN/SS COMP BST SW SW LD VREG PGND GND FB 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 ROSC RTOP RBOT CSS CIN COUT VOUT CBST CVREG L VIN CC_EA CCP_EA RC_EA FET 100 50 55 60 65 70 75 80 85 90 95 0 1 2 3 4 5 6 OUTPUT CURRENT (A) VOUT = 3.3V VOUT = 5V VOUT = 1.2V Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved. |
Аналогичный номер детали - FDS8880 |
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Аналогичное описание - FDS8880 |
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