ISL6260 DATASHEET PDFISL6260 DATASHEET PDF

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The voltage on NTC pin decreases to a level lower than 1. As long as the inductor time constant matches the droop circuit RC time constants as given above, the transient performance will be optimum.

If NTC voltage increases to 1. If the droop voltage is less than 84mV, for example, 80mV. This is fairly easy and can be accomplished by allowing the system to achieve thermal equilibrium at full load, and then adjusting Rdrp2 to obtain the desired Droop value. To reduce the mismatch, multiply both Rdrp1 and Rdrp2 by the appropriate factor.

Multiphase Core Regulator For IMVP-6 Mobile CPUs

Note that most practical core voltage regulators will have the overcurrent set to trip before the mV undervoltage limit. A with a minimum of ?

At load current step up, the switching frequency is increased resulting in a faster response than conventional fixed frequency PWM controllers. Xatasheet protection is independent of the overcurrent limit. We call this gain, G1. Combining these requirements gives: These values are extremely sensitive to layout. Renesas Electronics Components Datasheet. These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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It is better to have the cap value a little bigger to cover the tolerance of the inductor to prevent the output voltage from going lower than the spec. VSS Signal ground; Connect to local controller ground. A unity gain, differential datxsheet is. The switching frequency can increase during the application of a load to improve transient performance.

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Rdcr is the DCR resistance of the inductor. Figure 45 shows the thermal throttling feature with hysteresis. In Figure 46 we show a 3 phase solution using DCR sensing. A capacitor is added in parallel with RL in order to improve the stability margin of the channel current balance loop. If the output exceeds 1.

Dataaheet ISLC has several other key features.

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The external resistance difference in these two conditions is: In the example above, the resistance on the DFB pin is Rdrp1 in parallel with Rdrop2, that is, 1k in parallel with 8. Unless otherwise specified, tolerance: Power Monitor The power monitor signal is an analog output. For overcurrent less that 2. Therefore, a resistor is needed to be in series with the NTC. When the temperature goes down, the NTC thermistor voltage will eventually go up. In general, the switching frequency will be very close to the set value at high input voltage and heavy load conditions.

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This is due to the R 3 modulator commanding variable switching. Programmable 1, 2 or 3 Power Channels? The total current going from NTC pin is 60? Overcurrent protection is related to the voltage droop which is determined by the load line requirement. If the voltage on the NTC pin goes below the 1.

The pin 1 indentifier may be either a mold or mark feature. Assuming we desire an overcurrent trip level, Ioc, of 55A, and knowing from the Intel Specification that the load line slope, Rdroop is 0.

It will disable diode emulation. Once the board has been laid out, some tweaking may be required datasneet adjust the full load Droop.

ISL Datasheet, PDF – Alldatasheet

This affords the maximum amount of protection against a shorted high-side FET while preventing output ringing below ground. Capacitance on this pin would create instabilities and should be avoided. It is desirable to choose a small RC filter resistor in order to reduce the resistor divider effect. Rn is isl6206 given by Equation 9. Proper selection and placement of the NTC thermistor allows for detection of a designated temperature rise by the system.

dqtasheet

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.