NCP1550D ON, NCP1550D Datasheet - Page 11

• Manufacturer Part Number: NCP1550D
• Description: 600 kHz PWM/PFM Step-Down DC-DC Controller
• Manufacturer: ON

700
650
600
550
500
450
2.0
1.6
1.2
0.8
0.4
0
−50
−50
Figure 31. Oscillator Frequency versus Ambient
Figure 29. Off−Stage Current versus Ambient
Upper Trace: Output Voltage Ripple, 100 mV/Division
Lower Trace: Load Current, I
(V
IN
Figure 27. Load Transient Response for
= 5.0 V, I
−25
−25
T
T
A
A
, AMBIENT TEMPERATURE ( C)
, AMBIENT TEMPERATURE ( C)
LOAD
0
0
C
V
Temperature
= 100 mA to 1.0 A, L = 5.6 mH,
OUT
Temperature
OUT
= 33 mF)
25
= 2.5 V
25
1.8 V
LOAD
, 500 mA/Division
50
50
2.5 V
3.3 V
V
IN
1.8 V
75
= 5.0 V
75
3.3 V
2.5 V
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100
100
NCP1550
11
450
400
350
300
250
200
70
60
50
40
30
20
−50
Upper Trace: Output Voltage Ripple, 100 mV/Division
Lower Trace: Load Current, I
−50
(V
Figure 30. Operating Current versus Ambient
Figure 32. PWM/PFM Switch ON Time Threshold
Figure 28. Load Transient Response for
IN
= 5.0 V, I
−25
−25
T
2.5 V
A
T
, AMBIENT TEMPERATURE ( C)
A
versus Ambient Temperature
1.8 V
LOAD
, AMBIENT TEMPERATURE ( C)
0
C
V
= 100 mA to 1.0 A, L = 6.8 mH,
OUT
0
OUT
Temperature
2.5 V
3.3 V
= 33 mF)
= 1.8 V
25
LOAD
25
, 500 mA/Division
1.8 V
50
50
3.3 V
V
V
IN
CE
V
IN
= 5.0 V
= 5.0 V
75
= 5.0 V
75
100
100