NCV3011DTBR2G ON Semiconductor, NCV3011DTBR2G Datasheet
NCV3011DTBR2G
Specifications of NCV3011DTBR2G
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NCV3011DTBR2G Summary of contents
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... VREF SYNC COMP OUT RFB1 NCP3011DTBR2G TSSOP−14 R FB2 NCV3011DTBR2G TSSOP−14 †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. 1 http://onsemi.com 14 1 TSSOP−14 DT SUFFIX CASE 948G ...
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VCC INTERNAL BIAS POR/STARTUP EN ENABLE/ POWER GOOD LOGIC PG THERMAL SD SYNC CLK/ DMAX/ OSCILLATOR SOFT START RAMP 1.25 V VREF REFERENCE COMP REF OTA FB Figure 2. NCP3011 Block Diagram http://onsemi.com VC BOOST CLAMP LEVEL SHIFT VCC GATE ...
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PIN FUNCTION DESCRIPTION Pin Pin Name 1 VREF The VREF pin is the output for a 1.25 V reference (1 mA max). A 100 kW resistor in parallel with ceramic capacitor must be connected from this pin ...
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ABSOLUTE MAXIMUM RATINGS (measured vs. GND pin 8, unless otherwise noted) Rating High Side Drive Boost Pin Boost to V differential voltage SW COMP Enable Feedback High−Side Driver Output Low−Side Driver Output Power Good Synchronization Main Supply Voltage Input External ...
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ELECTRICAL CHARACTERISTICS ( Characteristic Input Voltage Range SUPPLY CURRENT Quiescent Supply Current V Supply Current CC V Supply Current CC UNDER VOLTAGE LOCKOUT UVLO Rising Threshold UVLO Falling Threshold OSCILLATOR Oscillator Frequency T Ramp−Amplitude Voltage Ramp Valley Voltage PWM Minimum ...
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ELECTRICAL CHARACTERISTICS ( Characteristic ERROR AMPLIFIER (GM) Transconductance Open Loop dc Gain Output Source Current Output Sink Current FB Input Bias Current Feedback Voltage COMP High Voltage COMP Low Voltage OUTPUT VOLTAGE FAULTS Feedback OOV Threshold Feedback OUV Threshold OVER ...
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TYPICAL PERFORMANCE CHARACTERISTICS Typical Application Circuit 65 Figure (A) out Figure 3. Efficiency vs. Output Current and Input Voltage 806 804 ...
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TYPICAL PERFORMANCE CHARACTERISTICS 1.39 1.375 1.36 in 1.345 1. 1.315 in 1.30 1.285 1.27 1.255 1.24 −40 −25 − TEMPERATURE (°C) Figure 9. Transconductance vs. Input ...
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TYPICAL PERFORMANCE CHARACTERISTICS 2 1.4 1.2 1.0 −40 −25 − TEMPERATURE (°C) Figure 15. SYNC Threshold vs. Input Voltage and Temperature ...
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TYPICAL PERFORMANCE CHARACTERISTICS 6 5.4 5.2 5.0 −40 −25 − TEMPERATURE (°C) Figure 21. Soft−Start Time vs. Input Voltage and Temperature ...
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OVERVIEW The NCP3011 operates as a 400 kHz, voltage−mode, pulse−width−modulated, (PWM) converter. It drives high−side and low−side N−channel power MOSFETs. The NCP3011 incorporates an internal boost circuit consisting of a boost Clamp and boost diode to provide supply voltage for ...
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Startup and Shutdown Once enable is asserted the device begins its startup process. Closed−loop soft−start begins after a 400 ms delay wherein the boost capacitor is charged, and the current limit threshold is set. During the 400 ms delay the ...
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Master/Slave Synchronization The SYNC pin performs two functions. The first function is to identify if the device is a master or a slave. The second function is to either synchronize to an external clock HSDR Upon initial power up, the ...
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The master slave identification begins when input voltage is applied prior to POR. Upon application of input voltage, the device waits for input pulses for a minimum shown in Figure 30. During the pulse detection period ...
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V2 = Vref * 125 Vref * 110 Vref * 90% FB V7= Vref * 75% Vref = 0.8 V Figure 32. OOV, OUV, and Power Good Circuit Diagram Trip Level Tolerance 2% Hysteresis = 5 ...
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V (vref * 125 %) 0.88 V (vref * 110 %) 0 vref * 100 %) 0.72 V (vref * 90%) 0.60 V (vref * 75%) FB Voltage Latch off Power Good Power Good Pin Reinitiate Softstart ...
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CURRENT LIMIT AND CURRENT LIMIT SET Overview The NCP3011 uses the voltage drop across the High Side MOSFET during the on time to sense inductor current. The Ilim Out CONTROL 6 DAC / COUNTER Itrip Ref−63 Steps, 6.51 mV/step Current ...
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No Trip: Vsense < I Itrip Ref Vsense ¾ Ton−2 1/4 1/2 3/4 Ton−1 Each switching cycle’s Ton is counted time steps. The 3/4 sample time value is held and used for the following cycle’s limit sample ...
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Reduced sampling time occurs at high duty cycles where the low side MOSFET is off for the majority of the switching period. Reduced sampling time causes errors in the regulated voltage on the boost pin. High duty cycle / input ...
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VIN VBOOST Maximum Normal VIN VBOOST Maximum Normal VIN VBOOST Figure 40. Typical Waveforms for Region 1 (top), Region 2 (middle), and Region 3 (bottom) To illustrate, a 0.1 mF boost capacitor operating at > 80% duty cycle and > ...
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Voltage Ripple Maximum Allowable Voltage 16 Maximum Boost Voltage 4.5 Inductor Selection When selecting the inductor important to know the input and output requirements. Some example conditions are listed ...
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10% 15% 20% 25 (V) IN Figure 42. Ripple Current Ratio ...
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Output Capacitor Selection The important factors to consider when selecting an output capacitor is dc voltage rating, ripple current rating, output ripple voltage requirements, and transient response requirements. The output capacitor must be rated to handle the ripple current at ...
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BST TH HSPU and OFF BST HSPD Next, the MOSFET output ...
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High−Side Logic Signal Low−Side Logic Signal t d(on) R DSmax High−Side MOSFET R DS(on)min DSmax Low−Side MOSFET R DS(on)min Another consideration during MOSFET selection is their delay times. Turn−on and turn−off times must be short enough to ...
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Compensation Type II This compensation is suitable for electrolytic capacitors. Components of the Type II compensation (Figure 45) network can be specified by the following equations: Figure 45. Type II Compensation ...
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IN− 1/2 IN− 3/4 IN− 5 VCC COMP GND Figure 47. Typical Application, V Reference Designator CIN−1 470 mF CIN−2 470 mF CIN− CIN− ...
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... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...