ADP1879 Analog Devices, ADP1879 Datasheet - Page 10

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

ADP1878/ADP1879
Figure 23. Switching Frequency vs. High Input Voltage, 300 kHz, ±10% of 12 V
Figure 24. Switching Frequency vs. High Input Voltage, 600 kHz, V
601.0
600.5
600.0
599.5
599.0
598.5
598.0
597.5
597.0
325
315
305
295
285
275
265
255
650
600
550
500
450
400
10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2
–40.0
13.0
Figure 22. Feedback Voltage vs. Temperature
13.4
V
REG
+125°C
+25°C
–40°C
–7.5
+125°C
+25°C
–40°C
13.8
= 5V, V
V
V
IN
REG
Range = 13 V to 16.5 V
14.2
IN
= 5V, V
TEMPERATURE (°C)
= 13V
25.0
14.6
V
IN
V
IN
IN
= 20V
(V)
(V)
15.0
57.5
15.4
90.0
15.8
NO LOAD
NO LOAD
16.2
OUT
122.5
= 1.8 V,
Rev. 0 | Page 10 of 40
Figure 25. Switching Frequency vs. High Input Voltage, 1.0 MHz,
330
320
310
300
290
280
270
260
250
240
900
880
860
840
820
800
780
760
740
720
700
280
265
250
235
220
205
190
Figure 26. Frequency vs. Load Current, 300 kHz, V
Figure 27. Frequency vs. Load Current, 300 kHz, V
13.0
0
0
1500
13.5
V
V
V
V
V
V
2000
IN
IN
IN
3000
IN
IN
IN
= 20V
= 13V
= 16.5V
= 13V
= 20V
= 16.5V
V
14.0
4500
IN
Range = 13 V to 16.5 V
LOAD CURRENT (mA)
+125°C
+25°C
–40°C
LOAD CURRENT (mA)
4000
6000
14.5
V
7500
+125°C
+25°C
–40°C
IN
+125°C
+25°C
–40°C
(V)
6000
15.0
9000
10,500
15.5
8000
12,000 13,500
Data Sheet
OUT
OUT
16.0
= 0.8 V
= 1.8 V
10,000
15,000
16.5