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ADP3050ARZ-5 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADP3050ARZ-5 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 20 page 200 kHz, 1 A High Voltage Step-Down Switching Regulator Data Sheet ADP3050 Rev. C 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 ©2008–2012 Analog Devices, Inc. All rights reserved. FEATURES Wide input voltage range: 3.6 V to 30 V Adjustable and fixed (3.3 V, 5 V) output options Integrated 1 A power switch Uses small surface-mount components Cycle-by-cycle current limiting Peak input voltage (100 ms): 60 V Configurable as a buck, buck-boost, and SEPIC regulator Available in 8-lead SOIC package Supported by ADIsimPower™ design tool APPLICATIONS Industrial power systems PC peripheral power systems Preregulator for linear regulators Distributed power systems Automotive systems Battery chargers FUNCTIONAL BLOCK DIAGRAM 200kHz OSCILLATOR FREQUENCY AND CURRENT LIMIT FOLDBACK 2.50V REGULATOR CURRENT SENSE AMPLIFIER BOOST FB SD GND BIAS CURRENT LIMIT gm 1.2V CMP R S Q DRIVER SWITCH IN COMP + ADP3050 3 6 7 4 5 1 2 8 Figure 1. GENERAL DESCRIPTION The ADP3050 is a current mode monolithic buck (step down) PWM switching regulator that contains a high current 1 A power switch and all control, logic, and protection functions. It uses a unique compensation scheme allowing the use of any type of output capacitor (tantalum, ceramic, electrolytic, OS-CON). Unlike some buck regulators, the design is not restricted to using a specific type of output capacitor or ESR value. A special boosted drive stage is used to saturate the NPN power switch, providing a system efficiency higher than conventional bipolar buck switchers. Further efficiency improvements are obtained by using the low voltage regulated output to provide the internal operating current of the device. A high switching frequency allows the use of small external surface-mount compo- nents. A wide variety of standard off-the-shelf devices can be used, providing a great deal of design flexibility. A complete regulator design requires only a few external components. The ADP3050 includes a shutdown input that places the device in a low power mode, reducing the total supply current to under 20 µA. Internal protection features include thermal shutdown circuitry and a cycle-by-cycle current limit for the power switch to provide complete device protection under fault conditions. The ADP3050 provides excellent line and load regulation, maintaining typically less than ±3% output voltage accuracy over temperature and under all input voltage and output current conditions. The ADP3050 is specified over the industrial temperature range of −40°C to +85°C and is available in a thermally enhanced 8-lead (not Pb-free only) SOIC package and a standard 8-lead (Pb-free only) RoHS-compliant SOIC package. |
Podobny numer części - ADP3050ARZ-5 |
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Podobny opis - ADP3050ARZ-5 |
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