ncp1508 ON Semiconductor, ncp1508 Datasheet - Page 6

• Manufacturer Part Number: ncp1508
• Description: Up To 500 Ma, 1 Mhz, High Efficiency Synchronous Stepdown Dcdc Converter In Dfn Package
• Manufacturer: ON Semiconductor

100
100
94
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90
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82
80
90
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70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
500
0
0
0
0
V
I
T
2.7 V
out
A
in
Figure 4. Efficiency vs. Output Current in
= 25°C
Figure 6. Efficiency vs. Output Current at
= 3.6 V
= 300 mA PWM
Figure 8. Efficiency vs. Frequency
in
1.89 V
3.6 V
700
100
100
in
out
Different Input Voltage
5.2 V
1.5 V
FREQUENCY (kHz)
900
PWM Mode
200
200
in
1.89 V
out
I
I
1.0 V
1.5 V
1.3 V
out
out
(mA)
(mA)
out
out
out
out
1.3 V
1100
300
300
out
V
T
V
T
A
out
A
in
= 25°C
= 25°C
= 3.6 V PWM
= 1.5 V PWM
1300
1.0 V
400
400
out
http://onsemi.com
1500
500
500
6
100
100
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90
85
80
75
70
94
92
90
88
86
84
82
80
90
80
70
60
50
40
30
20
10
0.001
500
0
2.7
I
Freq = 1 MHz
T
out
1.89 V
A
Figure 9. Efficiency vs. Output Current in
1.0 V
= 25°C
= 100 mA
Figure 5. Efficiency vs. Input Voltage in
Figure 7. Efficiency vs. Frequency
1.0 V
0.01
1.5 V
out
out
700
3.2
out
out
1.0 V
Pulsed Mode
1.5 V
FREQUENCY (kHz)
900
0.1
3.7
PWM Mode
out
I
1.3 V
out
out
V
1.3 V
in
1.3 V
(mA)
out
(V)
out
1100
out
4.2
1
1.89 V
V
I
T
out
A
in
= 25°C
= 3.6 V
= 150 mA PWM
V
T
A
in
out
= 25°C
1300
= 3.6 V PM
4.7
10
1.89 V
1.5 V
out
out
1500
100
5.2