el7556d Intersil Corporation, el7556d Datasheet
el7556d
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el7556d Summary of contents
Page 1
... OUTEN to provide automatic thermal shutdown. Adjustable oscillator frequency and slope compensation allow added flexibility in overall system design. The EL7556D is available in a 28-pin SO package and is specified for operation over the full -40°C to +85°C temperature range. Ordering Information PART TAPE & ...
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... TOP VIEW FB1 1 28 CREF 2 27 CSLOPE 3 26 COSC 4 25 VDD 5 24 VIN 6 23 VSSP 7 22 VIN 8 21 VSSP 9 20 VSSP 10 19 VSSP 11 18 VSSP 12 17 VCC2DET 13 16 OUTEN EL7556D FB2 CP C2V VSS VHI VSSP VSSP TEST PWRGD OT ...
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... V VCC2DET, OUTEN Input Low IL V Powergood Drive High OH PWGD V Powergood Drive Low OL PWGD CONTROLLER - REFERENCE V Reference Accuracy REF 3 EL7556D Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 135°C Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V 1nF 470pF OSC ...
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... LEAK X R Composite FET Resistance DSON R R Tempco DSONTC DSON t FET Break Before Make Delay BRM t High Side FET Minimum on Time (LEB) LEB 4 EL7556D = 5V 1nF 470pF OSC SLOPE CONDITIONS 0 < I < 100µA LOAD 10mA DD LOAD 0.2V < V < 1.4V OSC 0.2V < ...
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... V =1A OUT 0 100 C SLOPE Line Regulation vs C SLOPE V =V =5.0V ±10 0.8 T =25°C A 0.7 0.6 0.5 I =6A OUT 0.4 0.3 0.2 I =0.5A OUT 0.1 0 100 C SLOPE 5 EL7556D =3.5V) =4.5V DD 4.5 5.5 6.5 (A) 5.5 (I =3A) OUT V =2.5A OUT 125 150 175 (pF) 125 150 175 (pF) Efficiency =5.0V) LOAD DD 100 95 V =3. =2. = ...
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... F DD OSC 50 T =25° OUTEN =5. =4. 200 400 600 F (kHz) OSC 6 EL7556D V =2.5V OUT 125 150 175 (pF) T =25° 100k =5.5V V =5V DD =4.5V Continuous Mode 800 1000 V =5V DD 800 1000 V Variation vs Programmed Output OUT Voltage [V =(1+R /R ...
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... Cu Area Board with no Components Board with 27 25 0.00 1.00 2.00 3.00 Bare Cu Area ( Temperature DSON Temperature (°C) 7 EL7556D F =500k OSC 4.0 4.5 5.0 Inductor 4.00 5.00 6. 100 125 Minimum Output Voltage vs F OSC 2.3 T =120°C J 2.1 1.9 V =5.5V DD 1.7 1.5 V =5V 1.3 DD 1.1 V =4.5V DD ...
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... FB2 I 8 EL7556D Voltage feedback pin for the buck regulator. Active when VCC2DET is logic low. Normally connected to external resistor divider between V and GND. A 2µA pull-up current forces V OUT that FB1 is floating and VCC2DET is inadvertently connected to GND. Bandgap reference bypass capacitor. Typically 0.1µ Slope compensation capacitor ...
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... Applications Information Circuit Description General The EL7556D is a fixed frequency, current mode controlled DC:DC converter with integrated N-channel power MOSFETS and a high precision reference. The device incorporates all of the active circuitry required to implement a cost effective, user-programmable 6A synchronous buck converter suitable for use in CPU power supplies. By ...
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... In the continuous mode of operation the low-side switch will remain on until the end of the oscillator period. In order to improve the low current efficiency of the EL7556D, a zero-crossing comparator senses when the inductor transitions through zero. Turning off the low-side switch at ...
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... PCB in order to dissipate heat out and away from the device. The conductive paths for the EL7556D package are the fused leads 10, 11, 12, 18, and 19 sufficient amount of PCB metal area is connected to the fused package leads, a junction-to-ambient thermal resistance of approximately 31° ...