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CDRH103R Folha de dados(PDF) 1 Page - Analog Devices |
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CDRH103R Folha de dados(HTML) 1 Page - Analog Devices |
1 / 20 page 6.5 V, 4 A, High Efficiency, Step-Down DC-to-DC Regulator Data Sheet ADP2164 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 ©2011 Analog Devices, Inc. All rights reserved. FEATURES 4 A continuous output current 43 mΩ and 29 mΩ integrated FET ±1.5% output accuracy Input voltage range: 2.7 V to 6.5 V Output voltage: 0.6 V to VIN Switching frequency Fixed frequency: 600 kHz or 1.2 MHz Adjustable frequency: 500 kHz to 1.4 MHz Synchronizable from 500 kHz to 1.4 MHz Selectable synchronize phase shift: 0° or 180° Current mode architecture Precision enable input Power-good output Voltage tracking input Integrated soft start Internal compensation Starts up into a precharged output UVLO, OVP, OCP, and thermal shutdown Available in 16-lead, 4 mm × 4 mm LFCSP package APPLICATIONS Point-of-load conversion Communications and networking equipment Industrial and instrumentation Consumer electronics TYPICAL APPLICATIONS CIRCUIT ADP2164 PGOOD EN COUT C1 R2 RT CIN VOUT VIN SYNC TRK RT SW FB PGND GND VIN L R1 PVIN Figure 1. 100 95 90 85 80 75 70 65 60 55 50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 OUTPUT CURRENT (A) VIN = 5V fS = 600kHz VOUT = 1.2V VOUT = 3.3V Figure 2. Efficiency vs. Output Current GENERAL DESCRIPTION The ADP2164 is a 4 A, synchronous, step-down dc-to-dc regulator in a compact 4 mm × 4 mm LFCSP package. The regulator uses a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The output voltage of the ADP2164 is adjustable from 0.6 V to the input voltage (VIN). The ADP2164 is also available in six preset output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. The ADP2164 integrates a pair of low on-resistance P-channel and N-channel internal MOSFETs to maximize efficiency and minimize external component count. The 100% duty cycle operation allows low dropout voltage at 4 A output current. The high, 1.2 MHz PWM switching frequency allows the use of small external components, and the SYNC input enables multiple ICs to synchronize out of phase to reduce ripple and eliminate beat frequencies. Other key features of the ADP2164 include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown. |
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Descrição semelhante - CDRH103R |
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