ADP3178JR AD [Analog Devices], ADP3178JR Datasheet
ADP3178JR
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ADP3178JR Summary of contents
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GENERAL DESCRIPTION The ADP3158 and ADP3178 are highly efficient synchronous buck switching regulator controllers optimized for converting main supply into the core supply voltage required by high- performance processors. These devices use an internal 4-bit DAC ...
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ADP3158/ADP3178–SPECIFICATIONS Parameter SWITCHING REGULATOR Output Accuracy 1.3 V Output 1.65 V Output 2.05 V Output Line Regulation Crowbar Trip Point Crowbar Reset Point Crowbar Response Time VID INPUTS Input Low Voltage Input High Voltage Input Current Pull-Up Resistance Internal Pull-Up ...
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... Temperature Model Range ADP3158JR ADP3178JR CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADP3158/ADP3178 feature proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges ...
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ADP3158/ADP3178 –Typical Performance Characteristics 100 200 300 400 OSCILLATOR FREQUENCY – kHz TEK RUN DRVH 1 DRVL CH1 5.00V B W CH2 5.00V 1. CH1 –2.6500 s ...
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ADP3158/ ADP3178 VID0 GND 1 16 VID1 DRVH 2 15 4-BIT CODE 3 VID2 DRVL 14 VCC 4 VID3 13 LRFB2 5 LRFB1 12 LRDRV1 LRDRV2 CS– COMP 7 10 CS– CS 1.2V ADP3158/ ...
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ADP3158/ADP3178 ADP3158/ ADP3178 1 VID0 VID1 2 FROM CPU 3 VID2 4 VID3 5 LRFB1 C2 3.3V 68pF 6 LRDRV1 7 CS– C15 CS 10k V LR1 2.5V 100 F C10 1nF ...
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CT Selection for Operating Frequency The ADP3158 and ADP3178 use a constant off-time architecture with t determined by an external timing capacitor CT. Each OFF time the high-side N-channel MOSFET switch turns on, the volt- age across CT is reset ...
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ADP3158/ADP3178 There are many useful references for quickly designing a power inductor. Table II gives some examples. Table II. Magnetics Design References Magnetic Designer Software Intusoft (http://www.intusoft.com) Designing Magnetic Components for High-Frequency DC-DC Converters McLyman, Kg Magnetics ISBN 1-883107-00-08 Selecting ...
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R SENSE The value based on the maximum required output SENSE current. The current comparators of the ADP3158 and ADP3178 have a minimum current limit threshold of 69 mV. Note that the 69 mV value cannot be ...
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ADP3158/ADP3178 Note that there is a trade-off between converter efficiency and cost. Larger MOSFETs reduce the conduction losses and allow higher efficiency, but increase the system cost. If efficiency is not a major concern, a Vishay-Siliconix SUB45N03-13L ( ...
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OUTPUT CURRENT – correctly implement active voltage positioning, the low fre- quency output impedance (i.e., the output resistance) of the ...
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ADP3158/ADP3178 Trade-Offs Between DC Load Regulation and AC Load Regulation Casual observation of the circuit operation—e.g., with a voltmeter —would make it appear that the dc load regulation appears to be rather poor compared to a conventional regulator (see Figure ...
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LAYOUT AND COMPONENT PLACEMENT GUIDELINES The following guidelines are recommended for optimal perfor- mance of a switching regulator system: General Recommendations 1. For best results, a four-layer PCB is recommended. This should allow the needed versatility for ...
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ADP3158/ADP3178 Signal Circuitry 12. The output voltage is sensed and regulated between the GND pin (which connects to the signal ground plane) and the CS– pin. The output current is sensed (as a voltage) and regulated between the CS– pin ...
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Location Global change from ADP3158 to ADP3158/ADP3178 Change from REV REV. A. Edits to GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . ...
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