ISL85033IRTZ-T7A Intersil, ISL85033IRTZ-T7A Datasheet

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... OUTPUT LOAD (A) = 28V CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. All other trademarks mentioned are the property of their respective owners. (see page 24) 3.0 = +25°C A Copyright Intersil Americas Inc. 2010. All Rights Reserved ...

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Pin Configuration COMP1 PGND1 BOOT1 PHASE1 PHASE1 Pin Descriptions PIN NUMBER SYMBOL 1, 21 COMP1, COMP2 2, 20 FB1, FB2 3, 19 SS1, SS2 4, 18 PGND1, PGND2 5, 17 BOOT1, BOOT2 6, 7, 15, 16 PHASE1, PHASE2 8, 9, ...

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Pin Descriptions (Continued) PIN NUMBER SYMBOL 24 SYNCIN 25 SGND 22, 28 PGOOD1, PGOOD2 Open drain power-good output that is pulled to ground when the output voltage is below - PD Typical Application Schematics V OUT2 ...

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Typical Application Schematics V OUT1 R 5 42. 68pF 0 VCC C ss2 47nF C PGOOD2 ss1 47nF PGOOD1 V OUT1 PHASE2 L 2 7µ 10nF D 47 µ B340B ...

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Functional Block Diagram VCC 5MΩ SOFT-START SS2 CONTROL VOLTAGE MONITOR FAULT MONITOR EN2 POWER-ON VIN1 LDO RESET CC MONITOR VIN1 EN1 FAULT MONITOR MONITOR VOLTAGE CONTROL SS1 SOFT-START VCC 5MΩ VCC 5 ISL85033 ISL85033 - + -10% ...

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... Ordering Information PART NUMBER (Notes MARKING ISL85033IRTZ 850 33IRTZ NOTES: 1. Add “-T*” suffix for Tape and Reel. Please refer to 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations) ...

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Table of Contents Pin Configuration ................................................................................................................................ 2 Pin Descriptions .................................................................................................................................. 2 Typical Application Schematics............................................................................................................ 3 Functional Block Diagram .................................................................................................................... 5 Ordering Information ......................................................................................................................... 6 Absolute Maximum Ratings ................................................................................................................ 8 Thermal Information .......................................................................................................................... 8 Recommended Operating Conditions .................................................................................................. 8 Electrical Specificaitons ...

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... Maximum Storage Temperature Range . . . -65°C to +150°C Ambient Temperature Range . . . . . . . . . . . -40°C to +85°C Junction Temperature Range . . . . . . . . . . -55°C to +150°C Operating Temperature Range . . . . . . . . . . -40°C to +85°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Recommended Operating Conditions Temperature -40°C to +85°C Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 28V = -40°C to +85° ...

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Electrical Specifications T T +85°C (Continued) PARAMETER Soft-Start Ramp Time Soft-Start Charging Current POWER-GOOD PG1, PG2 Trip Level PG to PGOOD1, PGOOD2 PG1, PG2 Propagation Delay PG1, PG2 Low Voltage ENABLE INPUT EN1, EN2 Leakage Current EN1, EN2 Input Threshold ...

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Typical Performance Curves 100 500kHz OUT 60 3.3V 500kHz OUT 50 1.8V 300kHz OUT 40 0.0 0.5 1.0 1.5 OUTPUT LOAD (A) FIGURE 4. EFFICIENCY vs LOAD 28V IN 100 90 80 ...

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Typical Performance Curves 5.04 5.03 5.02 5. 28V IN 5.00 4.99 4. OUTPUT LOAD (A) FIGURE 10. V REGULATION vs LOAD, CURRENT OUT SHARING +25° 500kHz SW 5.04 ...

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Typical Performance Curves V OUT1 FIGURE 16. STEADY STATE OPERATION AT NO LOAD CHANNEL 9V) IN LX1 5V/DIV V RIPPLE 20mV/DIV OUT1 FIGURE 18. STEADY STATE OPERATION WITH FULL LOAD CHANNEL 1 LX2 10V/DIV V RIPPLE 20mV/DIV ...

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Typical Performance Curves V RIPPLE 20mV/DIV OUT2 FIGURE 22. LOAD TRANSIENT CHANNEL 2 FIGURE 24. SOFT-START WITH NO LOAD CHANNEL 2 FIGURE 26. SOFT-START AT FULL LOAD CHANNEL 2 13 ISL85033 ISL85033 Circuit of Figure ...

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Typical Performance Curves FIGURE 28. SOFT-DISCHARGE SHUTDOWN CHANNEL 2 FIGURE 30. RATIOMETRIC START-UP SEQUENCING AT NO LOAD LX1 10V/DIV V RIPPLE 20mV/DIV OUT1 LX2 10V/DIV SYNC 5V/DIV FIGURE 32. STEADY STATE OPERATION CHANNEL 1 AT FULL LOAD WITH SYNC FREQUENCY ...

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Typical Performance Curves FIGURE 34. OUTPUT SHORT CIRCUIT CHANNEL 1 FIGURE 36. OUTPUT SHORT CIRCUIT CHANNEL 2 15 ISL85033 ISL85033 Circuit of Figure 3A -40°C to +85°C, unless otherwise noted. Typical OUT2 A values ...

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Detailed Description The ISL85033 combines a standard buck PWM controller with an integrated switching MOSFET. The buck controller drives an internal N-Channel MOSFET and requires an external diode to deliver load current up to 3A. A Schottky diode is recommended ...

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The reason is that VOUT1 is still in regulation and can pull-up SS2 very quickly via the resistor added between VOUT1 and SS2. Figure 42 illustrates ...

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The internal overcurrent flag and counter are reset. A normal soft-start cycle is attempted and normal operation continues if the fault condition has cleared. If the overcurrent fault counter overflows during soft-start, the converter shuts down and this hiccup mode ...

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Regarding transient response needs, a good starting point is to determine the allowable overshoot in V the load is suddenly removed. In this case, energy stored in the inductor will be transferred to C causing its voltage to rise. After ...

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----------------------------------------- C ----------------------------------------- = , = 1 2 × where Io [A] is the output ...

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REF V REF FIGURE 47. TYPE II COMPENSATOR Figure 47 shows the type II compensator and its transfer function is expressed as ...

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Where the voltage drop of the Schottky diode. Selection of D the Schottky diode is critical in terms of the high temperature reverse bias leakage current which is very dependent on VIN and exponentially increasing with temperature. Due ...

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The critical small signal components include any bypass capacitors, feedback components, and compensation components. Place the PWM converter compensation components close to the FB and COMP pins. The feedback resistors should be located as close as possible to the FB ...

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... 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; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...

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Package Outline Drawing L28.4x4 28 LEAD THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 0, 9/ PIN 1 INDEX AREA TOP VIEW (3 . 20) PACKAGE BOUNDARY ( 50) TYPICAL RECOMMENDED LAND PATTERN 25 ...