EL7556AC ELANTEC [Elantec Semiconductor], EL7556AC Datasheet
EL7556AC
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EL7556AC Summary of contents
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... By combining integrated NMOS power FETS with a fused-lead package the EL7556AC can supply continuous output current without the use of external power devices or discrete heat sinks, thereby minimiz- ing design effort and overall system cost. ...
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... EL7556AC Programmable CPU Power Supply Unit Absolute Maximum Ratings Storage Temperature Range Supply ( Ambient Operating Temperature Important Note: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the specified ...
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... DSON t FET break before make delay brm High side FET minimum on time (LEB) t LEB Programmable CPU Power Supply Unit =25°C unless otherwise specified. A Conditions Vdd=5V, ILOAD=10mA .2V<V <1.4V OSC .2V<V <1.4V OSC LX=0V 3 EL7556AC Min Typ Max Units 7.1 7.7 8.3 V 1.2 V 150 µ 100 120 140 kHz ...
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... EL7556AC Programmable CPU Power Supply Unit Typical Performance Curves Efficiency vs LOAD OUT V =V =5.0V (±10 96% V =4.5V DD 94% 92% 90% 88% V =5.0V DD 86% V =5.5V DD 84% 82% 80% 0.5 1.5 2.5 3.5 4.5 I (A) OUT Line Regulation (C SLOPE 3.54 3.53 3.52 I =0.5A OUT 3.51 3.50 I OUT 3.49 3.48 I =6A OUT 3.47 3.46 4.5V 5.0V V (V) IN Line Regulation vs. C SLOPE V =V =5.0V ±10 0.8% 0.7% 0.6% 0.5% V =3.5V OUT ...
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... V =3.5V OUT -2.5% -3. 100 125 150 175 C (pF) SLOPE F vs. C OSC OSC 10000 TA=25°C 1000 100 100 1000 10000 C (pF) SLOPE EL7556AC Programmable CPU Power Supply Unit Load Regulation vs =3A, +3A, -2.5A OUT 0.8% 0.7% V =4.5V IN 0.6% 0.5% V =5.0V IN 0.4% 0.3% V =5.5V IN 0.2% 0.1% 0. 100 125 C (pF) SLOPE V Variation vs ...
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... EL7556AC Programmable CPU Power Supply Unit I I OSC 60 TA=25°C V =5. OUTEN Discontinuous Mode Continuous Mode 0 200 400 600 F (kHz) OSC I OSC 50 TA=25° OUTEN 200 400 600 F (kHz) OSC Power On Reset 40 TA=25° ...
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... Bare Cu Area ( vs. Temp DSON 100 125 0 Temp (°C) EL7556AC Programmable CPU Power Supply Unit Maximum I vs. Temp LOAD 7556 Demo Board (31°C/W) 8.0 100 LFM 7.5 7.0 6.5 6.0 5.5 5.0 Still Air 4.5 OUTEN connected (° ...
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... EL7556AC Programmable CPU Power Supply Unit Pin Description (I=Input O=Output S=Supply) Pin Number Pin Name Pin Type 1 FB1 I 2 CREF I 3 CSLOPE I 4 COSC I 5 VDD S 6 VIN S 7 VSSP S 8 VIN S 9 VSSP S 10 VSSP S 11 VSSP S 12 VSSP S 13 ...
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... COSC, Pin V2X - + - + Current Sense LEB T DELAY - + Current Limit PWM + S VDD Zero Cross Detect Over Temp Sensor PWRGD, Pin 16 CP, Pin 27 C2V, Pin 26 VHI, Pin 24 VDD and VIN, Pin 5,6,8 LX, Pin 20-23 VSSP, Pin 9-12, 18-19 OT, Pin 15 V Pin 25 SS, EL7556AC ...
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... Programmable CPU Power Supply Unit Applications Information Circuit Description General The EL7556AC is a fixed frequency, current mode con- trolled 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 syn- chronous buck converter suitable for use in CPU power supplies ...
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... FET, via the VHI pin. Reference A 1% temperature compensated band gap reference is integrated in the EL7556AC. The external CREF capac- itor acts as the dominant pole of the amplifier and can be increased in size to maximize transient noise rejection. A value of 0.1uF is recommended. ...
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... This dependence is shown in the typical per- formance curves. Thermal Management The EL7556AC utilizes fused-lead packaging technol- ogy in conjunction with the system board layout to achieve a lower thermal resistance than typically found in standard 28 lead SOIC packages. By fusing multiple ...
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... EL7556AC Programmable CPU Power Supply Unit General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir- cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement ...