ncp1550 ON Semiconductor, ncp1550 Datasheet - Page 6

• Manufacturer Part Number: ncp1550
• Description: 600 Khz Pwm/pfm Stepdown Dcdc Controller
• Manufacturer: ON Semiconductor

−0.3
−0.6
−0.9
100
0.9
0.6
0.3
80
60
40
20
0
0
10
2
V
C
C
M = NTGS3441T1
SD = MBRM120LT3
Figure 8. No Load Operating Current versus
IN
IN
OUT
Figure 6. Output Voltage Change versus
= 5.0 V
= 33 mF
I
LOAD
2.5
= 33 mF
, OUTPUT LOADING CURRENT (mA)
3.3 V
V
IN
2.5 V
3
, INPUT VOLTAGE (V)
3.0 V
Load Current
Input Voltage
3.5
2.7 V
1.8 V
90
75
60
45
30
15
100
0
1.9 V
2.7 V
1
TYPICAL OPERATING CHARACTERISTICS
4
NCP1550
V
C
C
I
SD = MBRM120LT3
OUT
IN
IN
OUT
NCP1550
C
C
CE = V
SD = MBRM120LT3
Figure 10. Output Ripple Voltage versus
IN
OUT
= 5.0 V
= 33 mF
= 500 mA
1.9 V
1.8 V
= 33 mF
4.5
= 33 mF
3.0 V
= 33 mF
IN
I
LOAD
2.5 V
5
, OUTPUT CURRENT (mA)
http://onsemi.com
10
3.3 V
Output Current
2.5 V
NCP1550
1000
5.5
6
1.8 V
−0.3
−0.6
−0.9
100
0.9
0.6
0.3
80
60
40
20
0
0
100
2
2
3.3 V
1.9 V
NCP1550
C
C
I
SD = MBRM120LT3
NCP1550
V
C
C
I
SD = MBRM120LT3
OUT
OUT
IN
OUT
IN
IN
OUT
Figure 7. Output Ripple Voltage versus
Figure 9. Output Voltage Change versus
= 33 mF
= 5.0 V
= 33 mF
2.5
2.5
= 500 mA
= 500 mA
= 33 mF
= 33 mF
V
IN
2.7 V
3.0 V
, BATTERY INPUT VOLTAGE (V)
1.8 V
V
3
3
1000
IN
, INPUT VOLTAGE (V)
Input Voltage
Input Voltage
1.9 V
3.5
3.5
2.7 V
2.7 V
2.5 V
3.0 V
4
4
3.0 V
1.8 V
4.5
4.5
3.3 V
1.9 V
3.3 V
5
5
2.5 V
5.5
5.5