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ADP2443-EVALZ Datasheet(PDF) 1 Page - Analog Devices |
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ADP2443-EVALZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 25 page 3 A, 36 V, Synchronous Step-Down DC-to-DC Regulator Data Sheet ADP2443 Rev. 0 Document Feedback 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 ©2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Continuous output current: 3 A Input voltage: 4.5 V to 36 V Integrated MOSFETs: 98 mΩ/35 mΩ Reference voltage: 0.6 V ± 1% Fast minimum on time: 50 ns Programmable switching frequency: 200 kHz to 1.8 MHz Synchronizes to external clock: 200 kHz to 1.8 MHz Precision enable and power good Cycle-by-cycle current limit with hiccup protection External compensation Programmable soft start time Startup into a precharged output Supported by ADIsimPower design tool APPLICATIONS Intermediate power rail conversion Multicell battery powered systems Process control and industrial automation Healthcare and medical Networking and servers TYPICAL APPLICATION CIRCUIT PVIN RRAMP CVREG CSS RT RC RBOT VOUT COUT RTOP CBST CC CIN VIN EN BST ADP2443 SW RAMP PGOOD RT/SYNC VREG GND PGND FB COMP SS L Figure 1. GENERAL DESCRIPTION The ADP2443 is synchronous step-down, dc-to-dc regulator with an integrated 98 mΩ, high-side power metal oxide semicon- ductor field effect transistor (MOSFET) and a 35 mΩ, synchronous rectifier MOSFET to provide a high efficiency solution in a compact 4 mm × 4 mm LFCSP package. The regulators operate from an input voltage range of 4.5 V to 36 V. The output voltage can be adjusted down to 0.6 V and deliver up to 3 A of continuous current. The fast 50 ns minimum on time allows the regulators convert high input voltage to low output voltage at high frequency. The ADP2443 uses an emulated current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. The switching frequency of the ADP2443 can be programmed from 200 kHz to 1.8 MHz. The synchronization function allows the switching frequency be syn- chronized with an external clock to minimize the system noise. The ADP2443 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 ADP2443 operates over the −40°C to +125°C operating junction temperature range and is available in a 24-lead, 4 mm × 4 mm LFCSP package. 100 50 55 60 65 70 75 80 85 90 95 0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT (A) VOUT = 5V VOUT = 3.3V Figure 2. Efficiency vs. Output Current, VIN = 24 V, fSW = 300 kHz |
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