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This is presented in Figure A good NTC thermistor compensation can limit the output voltage drift to 2mV. In the case the PC board trace resistance from the inductor to the microprocessor are not the same on all three phases, the current will not be balanced.
Customer can put a resistor in parallel with the current sensing capacitor on the phase of interest in order to purposely increase the current in that ddatasheet. The low-side FETs will remain on until the output voltage is pulled down below 0. Voltage Regulator Thermal Throttling lntel? VO An input to the IC that reports the local output voltage. When discrete resistor sensing is used, a capacitor of 10nF should be placed in parallel with RL to properly compensate the current balance circuit.
The IBAL circuit will adjust the channel pulse-widths up or down relative to the other channels to cause the voltages presented to the ISEN pins to be equal. Do not operate at or near the datashdet ratings listed for extended periods of time.
ISEN2 Individual current sensing for channel 2. There are two resistors around the inductor of each phase. A unity gain, differential amplifier is provided for remote CPU die sensing. Rtrace is the trace resistance from the inductor to the ksl6260 on the phase that needs to be tweaked.
On the phases that have too much trace resistance a resistor can be added in parallel with the ISEN capacitor that will correct for the poor layout.
For optimum load line regulation performance, the traces connecting these two pins to the Kelvin sense leads of the processor must be laid out in parallel and away from rapidly rising voltage nodes switching nodes and other noisy traces.
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The selection of Cn may require a slight adjustment to correct for layout inconsistencies and component tolerance. It is also used to reduce audible noise when entering or exiting Deeper Sleep Mode. In Figure 46 we show a 3 phase solution using DCR sensing. It is better to keep this resistor below 3k when using this file. The switching frequency can increase during the application of a load to improve transient performance. Limits established by characterization and are not production tested.
Dimensions in for Reference Only. VSS Signal sil6260 Connect to local controller ground. The reduction in ripple results in fewer components, lower component cost, reduced power datashet, and smaller implementation area. Current sense can be achieved by using either inductor DCR or discrete precision resistor. It affects both soft start and VID transitioning slew rate. An estimate of the value of the resistor is as shown in Equation The required resistance can be calculated by: For overcurrent less that 2.
The Rfset resistor that sets up the switching frequency of the 21 FN If the output exceeds 1.
A with dtaasheet minimum of ? But attention has to be paid in balancing the impedance of droop amplifier in this case. Basically, if the max current is 40A, the required droop voltage is 84mV with 2. For example, if the PC board trace on one phase is 0.
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Intel Mobile Voltage Positioning is a smart voltage regulation. The external resistance difference in these two conditions is: Datahseet is highly recommended to use symmetrical layout in order to achieve natural current balance. The voltage on NTC pin decreases to a level lower than 1.
PMON An analog output. For discrete resistor current sensing circuit, the droop circuit parameters can datasheeh solved the same way as the DCR sensing approach with a few slight modifications. Undervoltage protection is independent of the overcurrent limit.
Multiphase Core Regulator For IMVP-6 Mobile CPUs
Page 1 of H, Cn is calculated in Equation FB This pin is the inverting input of error amplifier. Dimension b applies to the metallized terminal and is measured between 0.
With both the outputs of RO and RS tied together, the simplified model for the droop circuit can be derived. A low level logic signal on this pin indicates that the micro-processor is in Deeper Sleep Mode. These resistors are used to sense the DC voltage drop across each inductor. Electrical Specifications Operating Conditions: