ADP1875 Analog Devices, ADP1875 Datasheet - Page 13

• Manufacturer Part Number: ADP1875
• Description: Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Saving Mode
• Manufacturer: Analog Devices

1450
1400
1350
1300
1250
1200
1150
1100
1050
1000
2.658
2.657
2.656
2.655
2.654
2.653
2.652
2.651
2.650
2.649
95
90
85
80
75
70
65
60
55
300
Figure 34. Frequency vs. Load Current, 1.0 MHz, V
0
–40
800
Figure 36. Maximum Duty Cycle vs. Frequency
400
–20
V
V
1600 2400 3200 4000 4800 5600 6400 7200
IN
IN
Figure 35. UVLO vs. Temperature
= 13V
= 16.5V
0
500
LOAD CURRENT (mA)
FREQUENCY (kHz)
TEMPERATURE (°C)
20
600
40
+125°C
+25°C
–40°C
700
60
800
80
900
OUT
100
+125°C
+25°C
–40°C
= 5 V
8000
1000
120
Rev. 0 | Page 13 of 44
680
630
580
530
480
430
380
330
280
230
180
680
630
580
530
480
430
380
330
280
230
180
82
80
78
76
74
72
70
68
66
64
62
Figure 37. Maximum Duty Cycle vs. High Voltage Input (V
Figure 39. Minimum Off-Time vs. VREG (Low Input Voltage)
2.7
5.5
–40
Figure 38. Minimum Off-Time vs. Temperature
6.7
–20
3.1
+125°C
+25°C
–40°C
VREG = 2.7V
VREG = 3.6V
VREG = 5.5V
7.9
0
3.5
9.1
TEMPERATURE (°C)
20
3.9
10.3
VREG (V)
V
IN
40
ADP1874/ADP1875
(V)
11.5
4.3
60
12.7
4.7
80
13.9
100
5.1
15.1
+125°C
+25°C
–40°C
16.3
120
IN
5.5
)