ncp1521 ON Semiconductor, ncp1521 Datasheet - Page 6

• Manufacturer Part Number: ncp1521
• Description: 1.5 Mhz, 600 Ma, Highefficiency, Low Quiescent Current, Adjustable Output Voltage Stepdown Converter
• Manufacturer: ON Semiconductor

1.8
1.7
1.6
1.5
1.4
1.3
1.2
2.0
1.5
1.0
0.5
0.0
-40
0
Figure 15. Output Voltage vs. Enable Input Pin
I
OUT
-20
Figure 13. Frequency vs. Temperature
= 300 mA
Figure 11. Soft Start Time (V
0.2
EN
2 V/Div
V
IN
0
0.4
, ENABLE INPUT VOLTAGE (V)
100 ms/Div
TEMPERATURE (°C)
20
0.6
Voltage
40
0.8
V
500 mV/Div
OUT
60
IN
1.0
= 3.6 V)
V
V
IN
IN
80
1.2
= 5.5 V
= 3.6 V
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NCP1521
100
1.4
6
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
100
1.8
1.7
1.6
1.5
1.4
1.3
3.0
2.5
2.0
1.5
1.0
0.5
0.0
90
80
70
60
50
40
30
20
10
0
2.7
2.7
0
V
V
OUT
OUT
Figure 16. PFM/PWM Threshold vs. Input
Figure 12. Frequency vs. Input Voltage
100
V
= 3.3 V
3.2
3.2
= 0.9 V
OUT
Figure 14. Load Regulation
I
OUT
= 1.8 V
200
V
, OUTPUT CURRENT (mA)
V
IN
3.7
3.7
IN
, INPUT VOLTAGE (V)
, INPUT VOLTAGE (V)
I
I
OUT
OUT
300
Voltage
= 300 mA
= 600 mA
4.2
4.2
400
4.7
4.7
500
V
T
A
OUT
= 25°C
5.2
5.2
600
= 1.8 V
700
5.7
5.7