el7566 Intersil Corporation, el7566 Datasheet
el7566
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el7566 Summary of contents
Page 1
... V adjustable switching frequency up to 1MHz enables the use of small components, thereby reducing board area consumption to under 0.72sq-in on one side of a PCB. The EL7566 operates in constant frequency PWM mode, making external synchronization possible. A soft-start feature is integrated in the EL7566 to limit in-rush currents and allow for a smooth voltage ramp from zero to regulation ...
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... EL7566DREZ (Note) 7566DREZ EL7566DREZ-T7 (Note) 7566DREZ EL7566DREZ-T13 (Note) 7566DREZ EL7566AIREZ (Note) 7566AIREZ EL7566AIREZ-T7 (Note) 7566AIREZ EL7566AIREZ-T13 (Note) 7566AIREZ NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020 ...
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... Error Amplifier Transconductance EA V Output Temperature Stability FB_TC F Switching Frequency S I Feedback Input Pull-up Current FB 3 EL7566 = 25°C) Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C +0.3V Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C IN Operating Ambient Temperature DRE . . . . . . . . . . . . . 0°C to +85°C Operating Ambient Temperatute AIRE . . . . . . . . . . .-40°C to +85°C +0. ...
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... Voltage feedback input; connected to external resistor divider between V output; also used for speed-up capacitor connection Output sense for fixed output option. This pin can be open for EL7566 Junction temperature monitor output Stress test enable; allows ±5% output movement; connect to SGND if function is not used Positive or negative stress select ...
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... Block Diagram V TJ JUNCTION TEMPERATURE V DD 2.2nF EN STP POWER TRACKING STN EA COMP SGND 5 EL7566 TM 0.047µF 390pF SEL V C REF OSC VOLTAGE OSCILLATOR REFERENCE PWM CONTROLLER DRIVERS CURRENT SENSE V REF - + 20Ω 0.22µ 100µF ...
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... JUNCTION TEMPERATURE (°C) FIGURE TEMPERATURE REF 4 3.5 V EN_HI 3 2 EN_LOW 1 3.5 4 4.5 V (V) DD FIGURE 5. V & V EN_HI EN_LOW 6 EL7566 = 100µ 150µ OUT V =2. =1. 5V) IN 100 150 5 5 25°C unless otherwise noted. A 100 V =2.5V O ...
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... OZ. COPPER ON BOTH SIDES PCB AREA (in FIGURE 9. HTSSOP THERMAL RESISTANCE vs PCB AREA (NO AIR FLOW) FIGURE 11. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE 7 EL7566 = 100µ 150µ OUT FIGURE 10. PACKAGE POWER DISSIPATION vs AMBIENT JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 1 ...
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... Waveforms 5V 2.5V 6A 500kHz 2.7µ 0.5ms/DIV FIGURE 12. START-UP 50µs/DIV FIGURE 14. SHUT-DOWN 1ms/DIV FIGURE 16. VOLTAGE MARGINING 8 EL7566 = 100µ 150µ 25°C unless otherwise noted. IN OUT A V (5V/DIV (2A/DIV (2V/DIV FIGURE 13. STEADY-STATE OPERATION V ...
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... S 5ms/DIV FIGURE 18. ADJUSTABLE START-UP Detailed Description The EL7566 capable buck regulator operating from an input voltage range 6V. The duty cycle can be adjusted from 0% to 100% allowing for a wide range of programmable output voltages. Patented on-chip resistorless current-sensing enables current mode control for excellent step load response ...
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... Always choose the converter self-switching frequency 20% lower than the sync frequency to accommodate component variations. Protection Features The EL7566 features a wide range of protective measures to prevent the persistence of damaging system conditions. These features are overvoltage, overcurrent, Power-On- Reset (POR), and Thermal Shutdown protection. ...
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... J 0.00384 Full Start-Up Control The EL7566 offers full start-up control. The core of this control is a start-up comparator in front of the main PWM controller. The STP and STN are the inputs to the comparator, whose HI output forces the PWM comparator to skip switching cycles. The user can choose any of the ...
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... ESR OUT × R ----------- - ------------------------------------------------------------------------------------------------- = C × VFB GM GM PWM EA 12 EL7566 where: • OUT • ESR is the ESR of the output capacitor • C OUT • • best performance, set this value to about one-tenth of the switching frequency. • Once Design Example ...
Page 13
... Thermal Management The EL7566 is packaged in a thermally-efficient HTSSOP-28 package, which utilizes the exposed thermal pad at the bottom to spread heat through PCB metal. Therefore: 1. The thermal pad must be soldered to the PCB. 2. Maximize the PCB area multiple layer PCB is used, thermal vias ( mil) must be placed underneath the thermal pad to connect to ground plane(s) ...
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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 14 EL7566 FN7102.7 May 8, 2006 ...