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參數資料
| 型號： | NCP1421 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 600 mA Sync-Rect PFM Step-Up DC-DC Converter with True-Cutoff and Ring-Killer(帶真切斷（true-cutoff）和振蕩消除（ring-killer）的600mA同步整流PFM步升DC-DC 轉換器) |
| 中文描述： | 600毫安同步整流PFM升壓型DC - DC轉換器與True - Cutoff和Ring殺手（帶真切斷（真實截止）和振蕩消除（環殺手）的600毫安同步整流PFM型步升的DC - DC轉換器） |
| 文件頁數： | 7/14頁 |
| 文件大小： | 116K |
| 代理商： | NCP1421 |
NCP1421
http://onsemi.com
7
TYPICAL OPERATING CHARACTERISTICS
10
5
5
10
10
100
1000
V
OUT
= 3.3 V
L = 5.6 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25 C
0
1.5
10
20
30
40
50
1.7
BATTERY INPUT VOLTAGE, V
BATT
/V
1.9
2.1
2.3
2.5
Figure 14. Output Voltage Change vs. Load
Current
Figure 15. Output Voltage Change vs. Load
Current
Figure 16. Battery Input Voltage vs. Output Ripple
Voltage
Figure 17. Low Battery Detect
Figure 18. No Load Operating Current vs. Input
Voltage at OUT Pin
V
IN
= 2.5 V
V
IN
= 2.0 V
0
OUTPUT LOADING CURRENT, I
LOAD
/mA
O
10
5
5
10
10
100
1000
V
OUT
= 5.0 V
L = 5.6 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25 C
V
IN
= 3.3 V
V
IN
= 1.5 V
0
OUTPUT LOADING CURRENT, I
LOAD
/mA
O
V
IN
= 2.5 V
300 mA
R
R
/
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 19. 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
N
B
/
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
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