NCP1550_06 ONSEMI [ON Semiconductor], NCP1550_06 Datasheet
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NCP1550_06
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NCP1550_06 Summary of contents
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NCP1550 600 kHz PWM/PFM Step−Down DC−DC Controller The NCP1550 is a monolithic micropower high frequency voltage mode step−down controller IC, specially designed for battery operated hand−held electronic products. With appropriate external P−type MOSFET, the device can provide up to 2.0 ...
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V OUT 2 GND M1 PIN FUNCTION DESCRIPTIONS Pin Symbol 1 CE Chip Enable pin, active high (internal pullup current source). By connecting this pin to GND, the switching operation of the controller will be stopped. 2 GND Ground ...
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ELECTRICAL CHARACTERISTICS otherwise noted.) Characteristic TOTAL DEVICE Input Voltage Output Voltage ( mA 25°C) LOAD A NCP1550SN18T1 NCP1550SN19T1 NCP1550SN25T1 NCP1550SN27T1 NCP1550SN30T1 NCP1550SN33T1 Input Current into V Pin OUT NCP1550SN18T1 NCP1550SN19T1 NCP1550SN25T1 NCP1550SN27T1 NCP1550SN30T1 NCP1550SN33T1 Temperature Coefficient ...
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ELECTRICAL CHARACTERISTICS unless otherwise noted.) Characteristic CE (PIN 1) CE “H” Input Voltage CE “L” Input Voltage CE “H” Input Current ( 5 “L” Input Current ( ...
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TYPICAL OPERATING CHARACTERISTICS 100 NCP1550SN33T1 3 OUT M = NTGS3441T1 SD = MBRM120LT3 100 I , OUTPUT LOADING CURRENT (mA) ...
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TYPICAL OPERATING CHARACTERISTICS OUT M = NTGS3441T1 0 MBRM120LT3 1 −0.3 2.7 V −0.6 −0.9 10 100 I , OUTPUT ...
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L = 3 LOAD Upper Trace: Output Voltage Ripple, 50 mV/Division Middle Trace: Inductor Current 500 mA/Division L Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 ...
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L = 5 LOAD Upper Trace: Output Voltage Ripple, 50 mV/Division Middle Trace: Inductor Current 500 mA/Division L Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 ...
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L = 6 LOAD Upper Trace: Output Voltage Ripple, 50 mV/Division Middle Trace: Inductor Current 500 mA/Division L Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 ...
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3 OUT Upper Trace: Output Voltage Ripple, 100 mV/Division Lower Trace: Input Voltage, 2.0 V/Division Figure 23. Line Transient Response for V = 3.3 V ...
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5 LOAD = 33 mF) C OUT Upper Trace: Output Voltage Ripple, 100 mV/Division Lower Trace: Load Current 500 mA/Division LOAD Figure 27. ...
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V IN 3.27 3.25 −50 − AMBIENT TEMPERATURE (°C) A Figure 33. NCP1550SN33T1 Output Voltage versus Ambient Temperature 1.85 1.83 1.81 1. 1.77 1.75 −50 − ...
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Detailed Operating Description The NCP1550 series are step−down (Buck) DC−DC controllers designed primarily for use in portable applications powered by battery cells. With an appropriate external P−channel MOSFET connected, the device can provide loading current with ...
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Inductor Value Calculation Selecting the proper inductance is a trade−off between inductor’s physical size, transient respond and power conversion requirements. Lower value inductor saves cost, PC board space and providing faster transient response, but result in higher ripple current and ...
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PCB Layout Recommendations Good PCB layout plays an important role in switching mode power conversion. Careful PCB layout can help to minimize ground bounce, EMI noise and unwanted feedbacks that can affect the performance of the converter. Suggested hints below ...
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ORDERING INFORMATION Output Voltage (V Part Number OUT NCP1550SN33T1 3.3 V NCP1550SN33T1G 3.3 V NCP1550SN30T1 3.0 V NCP1550SN30T1G 3.0 V NCP1550SN27T1 2.7 V NCP1550SN27T1G 2.7 V NCP1550SN25T1 2.5 V NCP1550SN25T1G 2.5 V NCP1550SN19T1 1.9 V NCP1550SN19T1G 1.9 V NCP1550SN18T1 1.8 ...
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NOTE *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and ...