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SD53-4R7-R Datasheet(PDF) 1 Page - Analog Devices |
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SD53-4R7-R Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator ADP2300/ADP2301 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevices foritsuse,norforanyinfringements of patents orother 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 ©2010 Analog Devices, Inc. All rights reserved. FEATURES 1.2 A maximum load current ±2% output accuracy over temperature range Wide input voltage range: 3.0 V to 20 V 700 kHz (ADP2300) or 1.4 MHz (ADP2301) switching frequency options High efficiency up to 91% Current-mode control architecture Output voltage from 0.8 V to 0.85 × VIN Automatic PFM/PWM mode switching Precision enable pin with hysteresis Integrated high-side MOSFET Integrated bootstrap diode Internal compensation and soft start Minimum external components Undervoltage lockout (UVLO) Overcurrent protection (OCP) and thermal shutdown (TSD) ADIsimPower™ online design tool Available in ultrasmall, 6-lead TSOT package APPLICATIONS LDO replacement for digital load applications Intermediate power rail conversion Communications and networking Industrial and instrumentation Healthcare and medical Consumer TYPICAL APPLICATIONS CIRCUIT 3.0V TO 20V VIN BST SW FB VOUT EN ON OFF GND ADP2300/ ADP2301 Figure 1. 60 65 70 75 80 85 90 95 100 0 0.2 0.4 0.6 0.8 1.0 1.2 IOUT (A) VIN = 12V VOUT = 5.0V fSW = 1.4MHz fSW = 700kHz Figure 2. Efficiency vs. Output Current GENERAL DESCRIPTION The ADP2300/ADP2301 are compact, constant-frequency, current-mode, step-down dc-to-dc regulators with integrated power MOSFET. The ADP2300/ADP2301 devices run from input voltages of 3.0 V to 20 V, making them suitable for a wide range of applications. A precise, low voltage internal reference makes these devices ideal for generating a regulated output voltage as low as 0.8 V, with ±2% accuracy, for up to 1.2 A load current. There are two frequency options: the ADP2300 runs at 700 kHz, and the ADP2301 runs at 1.4 MHz. These options allow users to make decisions based on the trade-off between efficiency and total solution size. Current-mode control provides fast and stable line and load transient performance. The ADP2300/ADP2301 devices include internal soft start to prevent inrush current at power-up. Other key safety features include short-circuit protec- tion, thermal shutdown (TSD), and input undervoltage lockout (UVLO). The precision enable pin threshold voltage allows the ADP2300/ADP2301 to be easily sequenced from other input/ output supplies. It can also be used as a programmable UVLO input by using a resistive divider. The ADP2300/ADP2301 are available in a 6-lead TSOT package and are rated for the −40°C to +125°C junction temperature range. |
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