Datasheet NCP1421 (ON Semiconductor) - 8

NCP1421 TYPICAL OPERATING CHARACTERISTICS
(VIN = 2.5 V, VOUT = 3.3 V, ILOAD = 50 mA; L = 5.6 H, COUT = 22 F) (VIN = 2.5 V, VOUT = 3.3 V, ILOAD = 500 mA; L = 5.6 H, COUT = 22F) Upper Trace: Output Voltage Ripple, 20 mV/Division Upper Trace: Output Voltage Ripple, 20 mV/Division Lower Trace: Voltage at Lx pin, 1.0 V/Division Lower Trace: Voltage at LX pin, 1.0 V/Division
Figure 20. Discontinuous Conduction Mode Figure 21. Continuous Conduction Mode Switching Waveform Switching Waveform
(VIN = 1.5 V to 2.5 V; L = 5.6 H, COUT = 22F, ILOAD = 100 mA) (VIN = 1.5 V to 2.5 V; L = 5.6 H, COUT = 22F, ILOAD = 100 mA) Upper Trace: Output Voltage Ripple, 100 mV/Division Upper Trace: Output Voltage Ripple, 100 mV/Division Lower Trace: Battery Voltage, VIN, 1.0 V/Division Lower Trace: Battery Voltage, VIN, 1.0 V/Division
Figure 22. Line Transient Response for VOUT = 3.3 V Figure 23. Line Transient Response For VOUT = 5.0 V
(VOUT = 3.3 V, ILOAD = 50 mA to 500 mA; L = 5.6 H, COUT = 22 F) (VOUT = 5.0 V, ILOAD = 50 mA to 500 mA; L = 5.6 H, COUT = 22 F) Upper Trace: Output Voltage Ripple, 50 mV/Division Upper Trace: Output Voltage Ripple, 100 mV/Division Lower Trace: Load Current, ILOAD, 500 mA/Division Lower Trace: Load Current, ILOAD, 500 mA/Division
Figure 24. Load Transient Response For VIN = 2.5 V Figure 25. Load Transient Response For VIN = 3.0 V http://onsemi.com 8