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NCP1508 Datasheet(PDF) 6 Page - ON Semiconductor

Part No. NCP1508
Description  Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in DFN Package
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1508 Datasheet(HTML) 6 Page - ON Semiconductor

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NCP1508
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6
Figure 4. Efficiency vs. Output Current in
PWM Mode
Vin (V)
70
75
80
85
90
95
100
2.7
3.2
3.7
4.2
4.7
5.2
1.0 Vout
1.3 Vout
1.5 Vout
1.89 Vout
Iout = 100 mA
Freq = 1 MHz
TA = 25°C
Iout (mA)
0
100
200
300
400
500
1.89 Vout
1.5 Vout
1.3 Vout
1.0 Vout
Vin = 3.6 V PWM
TA = 25°C
Figure 5. Efficiency vs. Input Voltage in
PWM Mode
Figure 6. Efficiency vs. Output Current at
Different Input Voltage
Figure 7. Efficiency vs. Frequency
Figure 8. Efficiency vs. Frequency
Figure 9. Efficiency vs. Output Current in
Pulsed Mode
FREQUENCY (kHz)
500
700
900
1100
1300
1500
1.0 Vout
1.3 Vout
1.89 Vout
1.5 Vout
Vin = 3.6 V
Iout = 150 mA PWM
TA = 25°C
80
84
82
86
88
90
94
0
10
20
30
40
50
60
70
80
90
100
0.01
0.1
1
10
100
0.001
Iout (mA)
Vin = 3.6 V PM
TA = 25°C
0
10
20
30
40
50
60
70
80
90
100
Iout (mA)
0
100
200
300
400
500
3.6 Vin
2.7 Vin
Vout = 1.5 V PWM
TA = 25°C
0
20
40
60
80
100
5.2 Vin
92
FREQUENCY (kHz)
500
700
900
1100
1300
1500
1.0 Vout
1.3 Vout
1.89 Vout
1.5 Vout
Vin = 3.6 V
Iout = 300 mA PWM
TA = 25°C
80
84
82
86
88
90
94
92
1.0 Vout
1.3 Vout
1.5 Vout
1.89 Vout
10
30
50
70
90


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