ADP3208 ON Semiconductor, ADP3208 Datasheet - Page 12

• Manufacturer Part Number: ADP3208
• Description: 7-bit, Programmable, Dual-phase, Mobile, Cpu, Synchronous Buck Controller
• Manufacturer: ON Semiconductor

ADP3208
TYPICAL PERFORMANCE CHARACTERISTICS
V
VID
Figure 9. RPM Mode Efficiency vs. Load Current Automatic in CCM/DCM
= 1.5 V, T
Figure 8. RPM Mode Efficiency vs. Load Current in CCM Only
95
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
91
89
87
85
83
81
79
77
75
0
0
0
Figure 7. PWM Mode Efficiency vs. Load Current
A
V
CCM/DCM
TRANSITION
= 20°C to 100°C, unless otherwise noted.
IN
V
= 8V
IN
10
= 12V
V
V
IN
V
IN
IN
= 12V
10
10
= 8V
LOAD CURRENT (A)
LOAD CURRENT (A)
= 12V
LOAD CURRENT (A)
V
V
IN
IN
= 8V
= 19V
V
20
IN
V
= 19V
IN
= 19V
30
20
20
f
SW
= 318kHz
40
Rev. 1 | Page 12 of 38 | www.onsemi.com
30
30
Figure 12. Switching Frequency vs. VID Output Voltage in PWM Mode
Figure 11. Switching Frequency vs. Load Current in RPM Mode
400
350
300
250
200
150
100
500
400
300
200
100
90
88
86
84
82
80
78
76
74
72
70
50
0
0
0
0
0
Figure 10. Efficiency vs. Load Current in All Modes
0.25
VARFREQ = 0V
AUTOMATIC CCM/DCM
5
RPM AUTOMATIC CCM/DCM
RPM CCM ONLY
10
VARFREQ = 5V
VID OUTPUT VOLTAGE (V)
0.50
10
LOAD CURRENT (A)
LOAD CURRENT (A)
CCM ONLY
20
0.75
15
1.00
30
20
PWM
RT = 237kΩ
1.25
V
25
IN
40
= 12V
1.50
30