Datasheet NCP1421 (ON Semiconductor) - 7

NCP1421 TYPICAL OPERATING CHARACTERISTICS
10 10 5 5 VIN = 2.5 V TAGE CHANGE/% 0 TAGE CHANGE/% 0 VIN = 3.3 V VOUT = 3.3 V VOUT = 5.0 V L = 5.6 H L = 5.6 H −5 C −5 IN = 22 F VIN = 2.0 V CIN = 22 F VIN = 1.5 V C V OUTPUT VOL IN = 2.5 V OUT = 22 F C OUTPUT VOL OUT = 22 F TA = 25_C TA = 25_C −10 −10 10 100 1000 10 100 1000 OUTPUT LOADING CURRENT, ILOAD/mA OUTPUT LOADING CURRENT, ILOAD/mA
Figure 14. Output Voltage Change vs. Load Figure 15. Output Voltage Change vs. Load Current Current
50 p−p VIN = 2.5 V /mV 40 VOUT = 3.3 V L = 6.8 H IPPLE R CIN = 22 F 30 COUT = 22 F T 500 mA A = 25_C TAGE, V 20 300 mA 10 RIPPLE VOL 100 mA 01.5 1.7 1.9 2.1 2.3 2.5 BATTERY INPUT VOLTAGE, VBATT/V Upper Trace: Voltage at LBI Pin, 1.0 V/Division Lower Trace: Voltage at LBO Pin, 1.0 V/Division
Figure 16. Battery Input Voltage vs. Output Ripple Figure 17. Low Battery Detect Voltage
/A 15 TT BA, I 12.5 10 TING CURRENT 7.5 VIN = 2.5 V 5.0 VOUT = 5.0 V ILOAD = 10 mA 2.5 NO LOAD OPERA 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Upper Trace: Input Voltage Waveform, 1.0 V/Division INPUT VOLTAGE AT OUT PIN, VOUT/V Lower Trace: Output Voltage Waveform, 2.0 V/Division
Figure 18. No Load Operating Current vs. Input Figure 19. Startup Transient Response Voltage at OUT Pin http://onsemi.com 7