NCV51411 ON Semiconductor, NCV51411 Datasheet
NCV51411
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NCV51411 Summary of contents
Page 1
... A, 260 kHz, Low Voltage Buck Regulator with Synchronization Capability The NCV51411 is a 1.5 A buck regulator IC operating at a fixed−frequency of 260 kHz. The device uses the V architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today’s high−speed logic ...
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... SHDNB SYNC V FB *See table above for load dump. NCV51411 BOOST SHDNB NCV51411 SYNC V GND Rating = Reflow: (Note 1) (Human Body Model) (Machine Model) (Charge Device Model) SO−8 Junction−to−Case, R SO−8 Junction−to−Ambient, R SO− ...
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... GND SW SHDNB SYNC SO−8 NCV51411 BOOST The BOOST pin provides additional drive voltage to the on−chip NPN power transistor. The resulting decrease in switch on voltage increases efficiency. V This pin is the main power input to the IC This is the connection to the emitter of the on−chip NPN power transistor and SW serves as the switch output to the inductor ...
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... Sync Pin Bias Current Sync Threshold Voltage Shutdown Shutdown Threshold Voltage Shutdown Pin Bias Current Thermal Shutdown Overtemperature Trip Point Thermal Shutdown Hysteresis 3. Guaranteed by design, not 100% tested in production. NCV51411 < 125°C, 4.5 V< V < unless otherwise specified Test Conditions − − − ...
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... Startup Voltage Minimum Output Current 4. Guaranteed by design, not 100% tested in production Shutdown Comparator 2.9 V LDO Voltage Regulator 1 1.27 V − NCV51411 (−40°C < T < 125°C, 4.5 V< V < unless otherwise specified Test Conditions SHDNB V − 2.5 V BOOST ...
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... Frequency Foldback Threshold. In short circuit or over−load conditions, this reduces the power dissipation of the IC and external components. An external clock signal can sync the NCV51411 to a higher frequency. The rising edge of the sync pulse turns on the power switch to start a new switching cycle, as shown in Figure 4 ...
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... The frequency foldback feature is disabled during the sync mode. Figure 4. A NCV51411 Buck Regulator is Synchronized to an External 350 kHz Pulse Signal Power Switch and Current Limit The collector of the built−in NPN power switch is ...
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... V during power up. There is no voltage over−shoot SW after the output voltage reaches the regulation. If the supply voltage rises slower than the V over−shoot. 1.0 1.5 IN Figure 8. The Power Up Transition of NCV51411 http://onsemi.com 8 2 control , the pin and thus output COMP ...
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... I = quiescent current. Q NCV51411 The pre−driver current is used to turn on/off the power switch and is approximately equal worst case. During steady state operation, the IC draws this current from the Boost pin when the power switch is on and then receives it from the V pin when the switch is off. The pre− ...
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... DUTY CYCLE Figure 11. Input Capacitor RMS Current can be Calculated by Multiplying Y Value with Maximum Load Current at any Duty Cycle NCV51411 Selecting the capacitor type is determined by each design’s constraint and emphasis. The aluminum electrolytic capacitors are widely available at lowest cost. Their ESR and ESL (equivalent series inductor) are relatively high ...
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... The ESL prevents the output capacitor from quickly charging up the parasitic capacitor of NCV51411 Figure 13. The Output Voltage Ripple Using One 100 mF POSCAP Capacitor Figure 15. The Output Voltage Ripple Using ...
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... Foldback Current Limit. See Table 1 for Schottky diodes from ON Semiconductor which are suggested for use with the NCV51411 regulator. Inductor Selection When choosing inductors, one might have to consider maximum load current, core and copper losses, component height, output ripple, EMI, saturation and cost ...
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... NCV51411MNR2 NCV51411MNR2G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. NCV51411 BOOST 4 SHDNB NCV51411 SYNC V C GND 0 0. ...
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... PLANE −Z− 0.25 (0.010 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCV51411 PACKAGE DIMENSIONS SOIC−8 NB CASE 751−07 ISSUE 0.10 (0.004) ...
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... BACK SIDE .175 .050 .200 .07 4 .024 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCV51411 PACKAGE DIMENSIONS PW SUFFIX CASE 751AG−01 ISSUE 45_ −W− DETAIL − ...
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... COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. MILLIMETERS DIM MIN MAX A 0.80 1.00 A1 0.00 0.05 A3 0.20 REF b 0.18 0.30 D 6.00 BSC D2 3.98 4.28 E 5.00 BSC E2 2.98 3.28 e 0.50 BSC K 0.20 −−− L 0.45 0.65 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. NCV51411/D ...