Datasheet

NCP1422
http://onsemi.com
6
TYPICAL OPERATING CHARACTERISTICS
−10
−5
5
10
1 100 1000
V
OUT
= 3.3 V
L = 5.6 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25_C
0
10
20
30
40
50
1.5 1.7 1.9 2.1 2.3 2.5
Figure 8. Output Voltage Change vs. Load Current
Figure 9. Output Voltage Change vs. Load Curr
en
Figure 10. Battery Input Voltage vs. Output Ripple
Voltage
Figure 11. Low Battery Detect
Figure 12. No Load Operating Current vs. Input
Voltage at OUT Pin
V
IN
= 2.0 V
V
IN
= 2.5 V
0
OUTPUT LOADING CURRENT, I
LOAD
/mA
OUTPUT VOLTAGE CHANGE/%
−10
−5
5
10
1 100 100
0
V
OUT
= 5.0 V
L = 5.6 H
C
IN
= 22 F
C
OUT
= 33 F
T
A
= 25_C
V
IN
= 3.3 V
V
IN
= 1.5 V
0
OUTPUT LOADING CURRENT, I
LOAD
/mA
OUTPUT VOLTAGE CHANGE/%
V
IN
= 2.5 V
300 mA
BATTERY INPUT VOLTAGE, V
BATT
/V
RIPPLE VOLTAGE, V
RIPPLE
/mV
p−p
100 mA
500 mA
V
IN
= 2.5 V
V
OUT
= 3.3 V
L = 6.8 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25_C
Upper Trace: Input Voltage Waveform, 1.0 V/Division
Lower Trace: Output Voltage Waveform, 2.0 V/Division
Figure 13. Startup Transient Response
2.5
5.0
7.5
10
12.5
15
1.5 2.0 2.5 3.0 3.5 5.0
INPUT VOLTAGE AT OUT PIN, V
OUT
/V
NO LOAD OPERATING CURRENT, I
BATT
/A
4.0 4.5
Upper Trace: Voltage at LBI Pin, 1.0 V/Division
Lower Trace: Voltage at LBO Pin, 1.0 V/Division
V
IN
= 2.5 V
V
OUT
= 5.0 V
I
LOAD
= 10 mA
1010