NCP1421D Просмотр технического описания (PDF) - ON Semiconductor

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NCP1421D

600 mA Sync-Rect PFM Step-Up DC-DC Converter with True-Cutoff and Ring-Killer

ON Semiconductor 

NCP1421

TYPICAL OPERATING CHARACTERISTICS

(VIN = 2.5 V, VOUT = 3.3 V, ILOAD = 50 mA; L = 5.6 mH, COUT = 22 mF)

Upper Trace: Output Voltage Ripple, 20 mV/Division

Lower Trace: Voltage at Lx pin, 1.0 V/Division

Figure 20. Discontinuous Conduction Mode

Switching Waveform

(VIN = 2.5 V, VOUT = 3.3 V, ILOAD = 500 mA; L = 5.6 mH, COUT = 22mF)

Upper Trace: Output Voltage Ripple, 20 mV/Division

Lower Trace: Voltage at LX pin, 1.0 V/Division

Figure 21. Continuous Conduction Mode

Switching Waveform

(VIN = 1.5 V to 2.5 V; L = 5.6 mH, COUT = 22mF, ILOAD = 100 mA)

Upper Trace: Output Voltage Ripple, 100 mV/Division

Lower Trace: Battery Voltage, VIN, 1.0 V/Division

Figure 22. Line Transient Response for VOUT = 3.3 V

(VIN = 1.5 V to 2.5 V; L = 5.6 mH, COUT = 22mF, ILOAD = 100 mA)

Upper Trace: Output Voltage Ripple, 100 mV/Division

Lower Trace: Battery Voltage, VIN, 1.0 V/Division

Figure 23. Line Transient Response For VOUT = 5.0 V

(VOUT = 3.3 V, ILOAD = 50 mA to 500 mA; L = 5.6 mH, COUT = 22 mF)

Upper Trace: Output Voltage Ripple, 50 mV/Division

Lower Trace: Load Current, ILOAD, 500 mA/Division

Figure 24. Load Transient Response For VIN = 2.5 V

(VOUT = 5.0 V, ILOAD = 50 mA to 500 mA; L = 5.6 mH, COUT = 22 mF)

Upper Trace: Output Voltage Ripple, 100 mV/Division

Lower Trace: Load Current, ILOAD, 500 mA/Division

Figure 25. Load Transient Response For VIN = 3.0 V

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