SI9121 Vishay, SI9121 Datasheet
SI9121
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SI9121 Summary of contents
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... D Integrated High Voltage Start-Up Circuit, with V Regulator CC DESCRIPTION The Si9121 simplifies the −48-V to +5-V or +3.3-V converter design for ISDN application by integrating the floating feedback error amplifier providing direct output voltage regulation. This approach eliminates the need for an external shunt regulator. The Si9121 also integrates a high voltage ...
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... Si9121 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS (ALL VOLTAGES REFERENCED TO GND = NEG (peak current ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... Vishay Siliconix Limits −40 to 85_C Temp Min Typ Max Full 1.2 1.5 Full 1.5 2.0 Full 0.2 0.3 Full 5 170 25 Room 77 Room NEG Soft Start Hiccup Discharge Mode OTP R Q − Si9121 c Unit COMP www.vishay.com 3 ...
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... Si9121 Vishay Siliconix TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED) 5-V V vs. Temperature OUT 5.15 5.10 5.05 5.00 4.95 4.90 4.85 −40 − Temperature (_C) r vs. Temperature DS(on) 2.5 2.0 1.5 1.0 0.5 −40 − Temperature (_C) www.vishay.com 4 3.45 3.40 3.35 3.30 3.25 3.20 3. 100 −40 105 100 100 −40 Supply Current vs. V NEG 1.4 1.3 25_C 1.2 85_C −40_C 1.1 1.0 −60 − ...
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... I (mA) OUT Document Number: 71112 S-40708—Rev. C, 19-Apr-04 Output Load vs. Efficiency (Si9121DY- 1000 Output Load vs. Efficiency (Si9121DY- 1000 Si9121 Vishay Siliconix No V Winding 100 ...
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... Soft-Start The Si9121 has an on-chip soft-start circuit which utilizes the error amplifier external compensation network to ramp the output NMOS transistor current limit which, in turn, allows the output voltage to rise gradually without excessive overshoot. ...
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... DETAILED DESCRIPTION Bypass The bypass voltage of the Si9121 is set at a particular positive reference relative to the V pin. The bypass voltage is used NEG to set an accurate voltage and bias current for the on-chip oscillator and soft-start circuits. The 0.1-mF ceramic decoupling capacitor is recommended between the bypass and V ...
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... V C5 NEG −10 to −60 V Silk Screen GND + C2* 0 0.25 0 −V IN −10 to −60 V FIGURE 2. Si9121 Application with External Vcc Through Winding www.vishay.com 8 6 GND BYPASS V OUT 7 V COMP NEG 0 Si9121DY-5 or Si9121DY-3 FIGURE 1 ...
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... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...