ISL6568CRZ Intersil Corporation, ISL6568CRZ Datasheet
ISL6568CRZ
Specifications of ISL6568CRZ
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ISL6568CRZ Summary of contents
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... Ordering Information TEMP. PART NUMBER* (°C) PACKAGE ISL6568CR 5x5 QFN ISL6568CRZ (Note 5x5 QFN (Pb-free) L32.5x5 ISL6568CRZA 5x5 QFN (Pb-free (Note) with Anneal) ISL6568IR - 5x5 QFN ISL6568IRZ (Note) - 5x5 QFN (Pb-free) L32 ...
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Block Diagram ICOMP OCSET ISEN AMP ISUM IREF RGND VSEN x1 x1 VDIFF UVP OVP OVP V OVP +150mV x 0.82 VID4 VID3 DYNAMIC VID2 VID D/A VID1 VID0 VID12.5 REF E/A FB COMP OFS OFFSET 2 ISL6568 PGOOD 100µA ...
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Typical Application - ISL6568 FB VDIFF VSEN RGND +5V VCC OFS FS REF ISL6568 VID4 VID3 VID2 VID1 VID0 VID12.5 PGOOD +12V GND ENLL IREF OCSET ICOMP 3 ISL6568 ISL6568 COMP +12V PVCC1 BOOT1 UGATE1 PHASE1 ISEN1 LGATE1 +12V PVCC2 ...
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Typical Application - ISL6568 with NTC Thermal Compensation FB VDIFF VSEN RGND +5V VCC OFS FS REF ISL6568 VID4 VID3 VID2 VID1 VID0 VID12.5 PGOOD +12V GND ENLL IREF OCSET ICOMP 4 ISL6568 ISL6568 COMP +12V PVCC1 BOOT1 UGATE1 PHASE1 ...
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... VCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±5% PVCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . +5V to 12V ±5% Ambient Temperature (ISL6568CR, ISL6568CRZ 0°C to 70°C Ambient Temperature (ISL6568IR, ISL6568IRZ .-40°C to 85°C CAUTION: Stress above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied ...
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Electrical Specifications Recommended Operating Conditions, Unless Otherwise Specified. (Continued) PARAMETER ERROR AMPLIFIER DC Gain (Note 3) Gain-Bandwidth Product (Note 3) Slew Rate (Note 3) Maximum Output Voltage Minimum Output Voltage OVERCURRENT PROTECTION OCSET trip current OCSET Accuracy ICOMP Offset PROTECTION ...
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Timing Diagram t PDHUGATE UGATE LGATE t FLGATE Simplified Power System Diagram +12V IN +5V IN 5-6 VID Functional Pin Description VCC VCC is the bias supply for the ICs small-signal circuitry. Connect this pin to a +5V supply and ...
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To encode the DAC with AMD Hammer VID codes, connect this pin to a +5V source through a 5kΩ resistor. VSEN and RGND VSEN and RGND are inputs to the precision differential remote-sense amplifier and should ...
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IL1 + IL2 + IL3, 7A/DIV IL3, 7A/DIV PWM3, 5V/DIV PWM2, 5V/DIV IL1, 7A/DIV PWM1, 5V/DIV 1µs/DIV FIGURE 1. PWM AND INDUCTOR-CURRENT WAVEFORMS FOR 3-PHASE CONVERTER Interleaving The switching of each channel in a multi-phase converter is timed to be ...
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FS pin and ground. Each cycle begins when the clock signal commands PWM1 to go low. The PWM1 transition signals the internal channel-1 MOSFET ...
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BOOT2 and PHASE2 pins, as described in the PWM Operation section ------------------------- - SEN L R ISEN I n SAMPLE & ISEN(n) HOLD - R + ...
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TABLE 3. VRM9 VOLTAGE IDENTIFICATION CODES (Continued) VID4 VID3 VID2 VID1 ...
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TABLE 4. VRM10 VOLTAGE IDENTIFICATION CODES (Continued) VID4 VID3 VID2 VID1 VID0 ...
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Load-Line (Droop) Regulation Some microprocessor manufacturers require a precisely- controlled output impedance. This dependence of output voltage on load current is often termed “droop” or “load line” regulation. As shown in Figure 6, a voltage, V DROOP total current in ...
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VDIFF + V R OFS FB VREF - FB I OFS OFS ISL6568 R OFS GND FIGURE 8. POSITIVE OFFSET OUTPUT VOLTAGE PROGRAMMING VDIFF - V R OFS FB VREF + FB I OFS VCC R OFS OFS ISL6568 FIGURE ...
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V 1 VID ---- - t = ----------------- - + 1.5 DVID f 0.0125 S Advanced ...
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ISL6568 INTERNAL CIRCUIT POR CIRCUIT ENABLE COMPARATOR + - 0.66V SOFT-START AND FAULT LOGIC FIGURE 11. POWER SEQUENCING USING THRESHOLD- SENSITIVE ENABLE (ENLL) FUNCTION 2. The voltage on ENLL must be above 0.66V. The EN input allows for power sequencing ...
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R OCSET ICOMP V - OCSET IREF + ISEN - - V DROOP ISUM + OC + VDIFF - +1V VID + 150mV SOFT-START, FAULT AND CONTROL LOGIC V OVP - OV VSEN + + RGND UV ...
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Equation 7. A constant 100µA flows through R , creating the OCSET voltage. When the droop OCSET voltage exceeds the OCSET voltage, the overcurrent protection circuitry activates. Since the droop voltage is proportional to the output current, ...
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Q , and the upper MOSFET r rr conduction loss. When the upper MOSFET turns off, the lower MOSFET does not conduct any portion of the inductor current until the voltage at the phase node falls below ground. ...
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PVCC HI2 LGATE LO2 GI2 G2 FIGURE 16. TYPICAL LOWER-GATE DRIVE TURN-ON PATH The total gate drive power losses are dissipated among the resistive components along the transition path and in the bootstrap ...
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Choosing the components for this current sense network is a two step process. First, R and C COMP chosen so that the time constant of this R network matches the time constant of the inductor L/DCR. Then the resistor R ...
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C (OPTIONAL COMP VDIFF FIGURE 20. COMPENSATION CONFIGURATION FOR LOAD-LINE REGULATED ISL6568 CIRCUIT Since the system poles and zero are affected by the values of the components that are meant to compensate ...
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Most capacitor solutions rely on a mixture of high frequency capacitors with relatively low capacitance in combination with bulk capacitors having high capacitance but limited high-frequency performance. Minimizing the ESL of the high-frequency capacitors allows them to support the output ...
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RMS current calculated. The voltage rating of the capacitors should also be at least 1.25 times greater than the maximum input voltage. Figure 23 provides the same input RMS current ...
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Extra care should be given to the LGATE traces in particular since keeping their impedance and inductance low helps to significantly reduce the ...
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VDIFF VSEN RGND +5V VCC (CF1) R OFS OFS FS REF REF ISL6568 VID4 VID3 VID2 VID1 VID0 VID12.5 PGOOD +12V GND ENLL IREF OCSET ICOMP R COMP ...
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... Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...