ADP1879 Analog Devices, ADP1879 Datasheet - Page 11

• Manufacturer Part Number: ADP1879
• Description: Synchronous Buck Controller with Constant On-Time and Valley Current Mode with Power Saving Mode
• Manufacturer: Analog Devices

Data Sheet
540
510
480
450
420
390
360
330
300
338
334
330
326
322
318
314
310
306
302
298
Figure 29. Frequency vs. Load Current, 600 kHz, V
675
655
635
615
595
575
555
535
515
495
Figure 30. Frequency vs. Load Current, 600 kHz, V
Figure 28. Frequency vs. Load Current, 300 kHz, V
0
0
0
1200
800
1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
V
V
1600
V
V
IN
IN
2400
V
V
IN
IN
IN
IN
= 13V
= 16.5V
= 13V
= 16.5V
= 13V
= 16.5V
2400
3600
LOAD CURRENT (mA)
3200
LOAD CURRENT (mA)
LOAD CURRENT (mA)
4800
4000
6000
+125°C
+25°C
–40°C
+125°C
+25°C
–40°C
4800
7200
5600
8400
6400 7200 8000 8800
9600 10,800
OUT
OUT
OUT
= 0.8 V
= 1.8 V
= 7 V
+125°C
+25°C
–40°C
12,000
Rev. 0 | Page 11 of 40
1225
1150
1075
1000
850
775
700
625
550
475
400
925
850
775
700
625
550
740
733
726
719
712
705
698
691
684
677
670
663
656
649
642
635
628
621
Figure 32. Frequency vs. Load Current, V
Figure 33. Frequency vs. Load Current, 1.0 MHz, V
Figure 31. Frequency vs. Load Current, 600 kHz, V
0
0
0
1200
800
2000
V
V
V
V
1600
V
V
IN
IN
IN
IN
2400
IN
IN
= 13V
= 16.5V
= 13V
= 16.5V
= 13V
= 16.5V
2400
3600
4000
3200
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
4800
4000
6000
4800
6000
+125°C
+25°C
–40°C
+125°C
+25°C
–40°C
ADP1878/ADP1879
+125°C
+25°C
–40°C
5600
7200
6400
8000
OUT
8400
7200
= 1.0 MHz, 0.8 V
9600 10,800
10,000
8000
OUT
OUT
8800
= 1.8 V
= 5 V
12,000
9600
12,000