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744325180 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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744325180 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 24 page 20 V, 4 A, Synchronous, Step-Down DC-to-DC Regulator Data Sheet ADP2384 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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. FEATURES Input voltage: 4.5 V to 20 V Integrated MOSFET: 44 mΩ/11.6 mΩ Reference voltage: 0.6 V ± 1% Continuous output current: 4 A Programmable switching frequency: 200 kHz to 1.4 MHz Synchronizes to external clock: 200 kHz to 1.4 MHz 180° out-of-phase clock synchronization Precision enable and power good External compensation Internal soft start with external adjustable option Startup into a precharged output Supported by ADIsimPower design tool APPLICATIONS Communications infrastructure Networking and servers Industrial and instrumentation Healthcare and medical Intermediate power rail conversion DC-to-dc point-of-load applications TYPICAL APPLICATIONS CIRCUIT ADP2384 BST FB COMP PGOOD GND VREG RT SYNC SS L CVREG RT SW PGND EN PVIN CIN VIN CBST COUT VOUT RTOP RBOT CC RC CSS Figure 1. 100 50 55 60 65 70 75 80 85 90 95 0 1.0 2.0 3.5 2.5 1.5 0.5 3.0 4.0 OUTPUT CURRENT (A) VOUT = 1.2V VOUT = 3.3V VOUT = 5V Figure 2. Efficiency vs. Output Current, VIN = 12 V, fSW = 300 kHz GENERAL DESCRIPTION The ADP2384 is a synchronous, step-down dc-to-dc regulator with an integrated 44 mΩ, high-side power MOSFET and an 11.6 mΩ, synchronous rectifier MOSFET to provide a high efficiency solution in a compact 4 mm × 4 mm LFCSP package. This device uses a peak current mode, constant frequency pulse- width modulation (PWM) control scheme for excellent stability and transient response. The switching frequency of the ADP2384 can be programmed from 200 kHz to 1.4 MHz. To minimize system noise, the synchronization function allows the switching frequency to be synchronized to an external clock. The ADP2384 requires minimal external components and operates from an input voltage of 4.5 V to 20 V. The output voltage can be adjusted from 0.6 V to 90% of the input voltage and delivers up to 4 A of continuous current. Each IC draws less than 120 μA current from the input source when it is disabled. This regulator targets high performance applications that require high efficiency and design flexibility. External compensation and an adjustable soft start function provide design flexibility. The power- good output and precision enable input provide simple and reliable power sequencing. Other key features include undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), short-circuit protection (SCP), and thermal shutdown (TSD). The ADP2384 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead, 4 mm × 4 mm LFCSP package. |
Số phần tương tự - 744325180 |
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Mô tả tương tự - 744325180 |
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