ncp1523b ON Semiconductor, ncp1523b Datasheet - Page 10

• Manufacturer Part Number: ncp1523b
• Description: 3 Mhz, 600 Ma, Highefficiency, Adjustable Output Voltage Stepdown Converter
• Manufacturer: ON Semiconductor

200 mA/Div
10 mV/Div
100
100
2 V/Div
2 V/Div
90
80
70
60
50
40
30
90
80
70
60
50
40
30
V
I
0
OUT
0
V
OUT
V
LX
IN
(V
Figure 22. Efficiency vs. Output Current
Figure 20. Efficiency vs. Output Current
IN
3.6 V
2.7 V
100
100
= 3.6 V, V
Figure 18. PWM Mode of Operation
V
I
I
in
OUT
OUT
= 5.2 V
, OUTPUT CURRENT (mA)
(V
, OUTPUT CURRENT (mA)
200
200
(V
OUT
OUT
IN
= 3.6 V, 255C)
= 1.2 V, 255C)
= 1.2 V, I
300
300
OUT
400
400
= 300 mA, 255C)
NCP1523B CHARACTERISTICS
3.3 V
1.2 V
0.9 V
500
500
http://onsemi.com
NCP1523
600
600
10
100
3.6
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
90
80
70
60
50
40
30
90
80
70
60
50
2.8
0
2.5
Voltage (V
Figure 19. Switching Frequency vs. Input
Figure 21. Efficiency vs. Output Current
Figure 23. Efficiency vs. Input Current
100
3.0
3.3
(V
I
OUT
(V
OUT
OUT
V
V
OUT
, OUTPUT CURRENT (mA)
200
IN
in
3.5
= 1.2 V, I
, INPUT VOLTAGE (V)
, INPUT VOLTAGE (V)
= 1.2 V, I
3.8
= 1.2 V, V
300
4.0
25°C
OUT
OUT
4.3
IN
25°C
= 100 mA)
= 300 mA, 255C)
= 3.6 V)
400
4.5
−40°C
85°C
4.8
−40°C
85°C
500
5.0
5.3
600
5.5