ncp3101c ON Semiconductor, ncp3101c Datasheet
ncp3101c
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ncp3101c Summary of contents
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... The NCP3101C is a high efficiency DC−DC buck converter designed to operate from supply. The device is capable of producing an output voltage as low as 0.8 V. The NCP3101C can continuously output 6 A through MOSFET switches driven by an internally set 275 kHz oscillator. The 40−pin device provides an optimal level of integration to reduce size and cost of the power supply ...
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VCC 13 FB POR UVLO − 0.8 V ref CLOCK COMP DIS RAMP 17 − FAULT + 400 −550 mV VOCTH CPHS FAULT FAULT − PWM OUT S OSC FAULT OSC ...
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Table 1. PIN FUNCTION DESCRIPTION Pin No Symbol 1−4, 36−40 PWRPHS 5−12 PWRGND 13 VCC 14,15,19,20,23 AGND COMP/DIS TGOUT 22 CPHS 24 BST 25 TGIN 26−34 PWRVCC 35 BG Table 2. ABSOLUTE MAXIMUM RATINGS ...
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Table 2. ABSOLUTE MAXIMUM RATINGS Pin Name Bootstrap Pin Voltage vs V PWRPHS High Side Switch Max DC Current V Pin Voltage PWRPHS V Pin Voltage (spikes < 50 ns) PWRPHS CPHASE Pin Voltage CPHASE Pin Voltage (spikes < 50 ...
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Table 3. ELECTRICAL CHARACTERISTICS for min/max values unless otherwise noted). Characteristic Power Power Channel Input Voltage Range Boost Voltage Range SUPPLY CURRENT Quiescent Supply Current Quiescent Supply Current V Supply Current CC V Supply Current CC Boost Quiescent Current Shutdown ...
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TYPICAL OPERATING CHARACTERISTICS 285 284 283 282 281 280 12 V 279 278 5 V 277 276 275 −40 − JUNCTION TEMPERATURE (°C) J Figure 5. Frequency (F Temperature 0.807 0.805 0.803 0.801 0.799 ...
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TYPICAL OPERATING CHARACTERISTICS −40 − JUNCTION TEMPERATURE (°C) J Figure 11. I vs. ...
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TYPICAL OPERATING CHARACTERISTICS −40 − JUNCTION TEMPERATURE (°C) Figure 17. Minimum Duty Cycle vs. Temperature http://onsemi.com 8 80 100 120 ...
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... MOSFET is driven off, and the bottom MOSFET is driven on as shown in Figure 19. In the disabled mode, the OTA output source current is reduced to 10 mA. When disabling the NCP3101C using the COMP / Disable pin, an open collector or open drain drive should be used as shown in Figure 20. ...
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... Under Voltage Lockout (UVLO) is provided to ensure that unexpected behavior does not occur when V support the internal rails and power the converter. For the NCP3101C, the UVLO is set to ensure that the IC will start 0.4V up when VCC reaches 4.0 V and shutdown when V below 3.6 V. The UVLO feature permits smooth operation from a varying 5 ...
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... The accuracy is best at the highest set point (550 mV). The accuracy will decrease as the set point decreases. Drivers The NCP3101C drives the internal high and low side switching MOSFETS with 1 A gate drivers. The gate drivers also include non− ...
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... ON Semiconductor has a Microsoft Excel® based design tool available online under the design tools section of the NCP3101C product page. The tool allows you to capture your design point and optimize the performance of your regulator based on your design criteria. Table 4. DESIGN PARAMETERS ...
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... The output capacitor must be rated to handle the ripple current at full load with proper derating. The RMS ratings given in datasheets are generally for lower switching frequency than used in switch mode power supplies, but a multiplier is usually given for higher frequency operation. The RMS current for the output capacitor can be calculated ...
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... ESL). Table 5 shows values of voltage drop and recovery time of the NCP3101C demo board with the configuration shown in Figure 27. The transient response was measured for the load current step from (50% to 100% load). ...
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Table 5. TRANSIENT RESPONSE VERSUS OUTPUT CAPACITANCE (50% to 100% Load Step) Drop (mV) COUT OS−CON (mF) 0 384 100 224 150 192 220 164 270 156 560 128 820 112 1000 112 Figure 27. Typical Waveform of Transient Response ...
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P = High side MOSFET total switching SW_TOT losses The first term for total switching losses from Equation 24 are the losses associated with turning the high−side MOSFET on and off and the corresponding overlap in drain voltage and current. ...
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MOSFET turning off and the high−side MOSFET turning on, typically Low−side MOSFET body diode losses BODY V = Body diode forward voltage drop FD Control Dissipation The control portion of the IC power dissipation is determined ...
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... A good starting value is 10 kW. The NCP3101C allows the output of the DC−DC regulator to be adjusted down to 0.8 V via an external resistor divider network. The regulator will maintain 0 the feedback pin. Thus resistor divider circuit was ...
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In practical design, the feed through resistor should the value minimize error from high frequency feed 2 through noise. Using the 2X assumption and the feed through capacitor can be calculated ...
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The cross over combined compensation network can be used to calculate the transconductance output compensation network as follows ³ 43.3 nF ...
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ICinrush_PK CIN ESR 12 120 CIN 0.316 * ICin_RMS CINESR 0 330 mF 5. 0.316 * 0.1 ...
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... External compensation components (R1, C9) are needed for converter stability. They should be placed close to the NCP3101C. The feedback trace is recommended to be kept as far from the inductor and noisy power traces as possible. The resistor divider and feedback acceleration circuit (R2, R3, R6, C13) are recommended to be placed near output feedback (Pin 16, NCP3101C) ...
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... RLO8 PWRVCC BG PWRPHS Figure 36. Schematic Diagram of NCP3101C Evaluation Board http://onsemi.com 23 NC COMP FB AGND AGND VCC PWRGND PWRGND PWRGND ...
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... ORDERING INFORMATION Device NCP3101CMNTXG †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. Temperature Grade Package For −40°C to +125°C QFN40 (Pb−Free) http://onsemi.com 24 † Shipping 2500 / Tape & Reel ...
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... BOTTOM VIEW 0.72 0.92 1.58 6.30 2.31 0.92 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS QFN40 6x6, 0.5P CASE 485AK−01 ISSUE A NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSIONS: MILLIMETERS. ...
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... N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 26 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP3101C/D ...