isl8560 Intersil Corporation, isl8560 Datasheet
isl8560
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isl8560 Summary of contents
Page 1
... MARKING (°C) ISL8560IRZ ISL8560IRZ - 6x6 QFN L20.6x6B ISL8560IRZ-T* ISL8560IRZ - 6x6 QFN L20.6x6B *Please refer to TB347 for details on reel specifications. NOTE: 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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... Total Variation on Set Frequency Frequency Range (Set by RTCT) SYNC Range Tested Oscillation Frequency Max Ramp Amplitude 2 ISL8560 Thermal Information Thermal Resistance (Typical, Notes 1, 2) θ QFN Package Maximum Power Dissipation Maximum Junction Temperature (Hermetic Package or Die +150°C Maximum Junction Temperature (Plastic Package +150°C Maximum Storage Temperature Range . . . . . . . . . .-65° ...
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... Input LOW Level (Unasserted) Input Current HIGH Input Current LOW SYNC Input HIGH Level (Asserted) Input LOW Level (Unasserted) Input Current HIGH Input Current LOW THERMAL SHUT-DOWN Thermal Shut-down Temperature Thermal Shut-down Hysteresis 3 ISL8560 = 48V 5.0V OUT SYMBOL TEST CONDITIONS V /ΔV VIN OSC V ...
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... The minimum duty cycle is zero. 4 ISL8560 SGND (Pin 8) The SGND terminal of the ISL8560 provides the return path for the control and monitor portions of the IC. FB (Pin 9) This is the feedback pin. The feedback ratio is set by an external resistor divider connected to the load. ...
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... FB 3pF 1.6k +14 -14% 5 ISL8560 RTCT RAM EAM OVFLT UVFLT FIGURE 1. BLOCK DIAGRAM OF THE ISL8560 SYNC VCC5 LDO PW M LOG IC CONTRO LLER PRO TECTIO N DRIVER O CFLT + + CSA 3µs DELAY September 18, 2007 VIN ...
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... VIN 9V TO 60V VIN + 150µF 0.1µF LX PGND BOOT EN# VIN VCC5 R1 20k SYNC C3 C1 1µF RTCT 470pF SGND FIGURE 2. TYPICAL SCHEMATIC FOR ISL8560 (5V V VIN VIN 18V TO 60V VIN + 150µF 0.1µF LX PGND BOOT EN# VIN VCC5 R1 20k SYNC C3 1µF C1 RTCT ...
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... OUTPUT LOAD (A) FIGURE 6. EFFICIENCY vs LOAD (36V INPUT - 500kHz) 3.38 3.35 3.32 3.29 36V V IN 3.26 3.23 3.20 0.0 0.5 1.0 1.5 OUTPUT LOAD (A) FIGURE 8. V REGULATION vs LOAD OUT (V = 3.3V - 500kHz) OUT 7 ISL8560 100 5V V 12V V OUT OUT 1.2V V OUT 1.5 2.0 0.0 FIGURE 5. EFFICIENCY vs LOAD (24V INPUT - 500kHz) 100 OUT 1.8V V OUT ...
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... V IN 0.0 0.0 0.5 1.0 OUTPUT LOAD (A) FIGURE 12. POWER DISSIPATION vs LOAD (V = 3.3V - 500kHz) OUT 3.0 2.5 2.0 48V V IN 1.5 1.0 0.5 0.0 0.0 0.5 1.0 OUTPUT LOAD (A) FIGURE 14. POWER DISSIPATION vs LOAD (V = 12V - 500kHz) OUT 8 ISL8560 (Continued) 24.4 24.3 24.2 24V V IN 24.1 24.0 48V V IN 23.9 23.8 1.5 2.0 2.5 FIGURE 11. V 36V V IN 24V V IN 1.5 2.0 FIGURE 13. POWER DISSIPATION vs LOAD 36V V IN 24V V IN 1.5 2 ...
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... FIGURE 18. OUTPUT VOLTAGE REGULATION 12V - 500kHz) OUT 900 800 700 600 500 400 300 200 100 (V) IN FIGURE 20. POWER DISSIPATION 5000kHz) OUT 9 ISL8560 (Continued) 5.10 5.05 5.00 4.95 4.90 4.85 4. FIGURE 17. OUTPUT VOLTAGE REGULATION 24.75 24.50 24. OUT 24.00 23.75 23.50 23. FIGURE 19. OUTPUT VOLTAGE REGULATION vs V ...
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... Typical Performance Curves LX = 10V/DIV V RIPPLE = 50mV/DIV OUT RTCT = 2V/DIV FIGURE 22. STEADY STATE OPERATION WITH FULL LOAD FIGURE 24. SOFT-START AT NO LOAD FIGURE 26. SOFT-START AT FULL LOAD 10 ISL8560 (Continued 1A/DIV EN = 5V/DIV V = 2V/DIV OUT PRE-BIASED WITH 2V/DIV IL = 0.5A/DIV FIGURE 25. SOFT-START WITH PRE-BIASED EN = 5V/DIV V = 2V/DIV ...
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... Additional feature includes programable soft-start to support proper start up of wide output capacitance range. Start-Up and Shut-Down When the EN pin is connected to a logic high, the ISL8560 is in the shut-down mode. All the control circuitry and both MOSFETs are off, and V falls to zero. In this mode, the OUT total input current is less than 110µ ...
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... Thermal Protection If the ISL8560 IC junction temperature reaches a nominal temperature of +150°C, the regulator will be disabled. The ISL8560 will not re-enable the regulator until the junction temperature drops below +135°C. Output Capacitor Selection An output capacitor is required to filter the inductor current and supply the load transient current ...
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... One of the parameters limiting the converter’s response to a load transient is the time required to change the inductor current. Given a sufficiently fast control loop design, the ISL8560 will provide either 0% or 100% duty cycle in (EQ. 4) response to a load transient. The response time is the time required to slew the inductor current from an initial current value to the transient current level ...
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... LC = ------------------------------------------ - f ESR = 2π The compensation network consists of the transconductance amplifier (internal to the ISL8560) and the impedance networks Z and Z . The goal of the compensation IN FB network is to provide a closed loop transfer function with the highest 0dB crossing frequency (f 0dB margin ...
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... Careful component selection, tight layout of the critical components, and short, wide traces minimizes the magnitude of voltage spikes. There are two sets of critical components in the ISL8560 switching converter. The switching components are the most critical because they switch large amounts of energy, and therefore tend to generate large amounts of noise ...
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... This allows the heat to move away from the IC and also ties the pad to the ground plane through a low impedance path. The switching components should be placed close to the ISL8560 first. Minimize the length of the connections between the input capacitors Make the PGND and the IN output capacitors as short as possible ...
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... 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. For information regarding Intersil Corporation and its products, see www.intersil.com 17 ISL8560 L20.6x6B 20 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VJJB ISSUE C) ...