Datasheet

ADP1878/ADP1879 Data Sheet
Rev. B | Page 10 of 40
Figure 22. Feedback Voltage vs. Temperature
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
OUT
= 1.8 V,
V
IN
Range = 13 V to 16.5 V
Figure 25. Switching Frequency vs. High Input Voltage, 1.0 MHz,
V
IN
Range = 13 V to 16.5 V
Figure 26. Frequency vs. Load Current, 300 kHz, V
OUT
= 0.8 V
Figure 27. Frequency vs. Load Current, 300 kHz, V
OUT
= 1.8 V
601.0
600.5
600.0
599.5
599.0
598.5
598.0
597.5
597.0
–40.0 –7.5 25.0 57.5 90.0 122.5
FEEDBACK VOLTAGE (V)
TEMPERATURE (°C)
V
REG
= 5V, V
IN
= 13V
V
REG
= 5V, V
IN
= 20V
09441-022
325
315
305
295
285
275
265
255
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
SWITCHING FREQUENCY (kHz)
V
IN
(V)
+125°C
+25°C
–40°C
NO LOAD
09441-023
650
600
550
500
450
400
13.0 13.4 13.8 14.2 14.6 15.0 15.4 15.8 16.2
SWITCHING FREQUENCY (kHz)
V
IN
(V)
+125°C
+25°C
–40°C
NO LOAD
09441-024
900
880
860
840
820
800
780
760
740
720
700
13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5
SWITCHING FREQUENCY (kHz)
V
IN
(V)
+125°C
+25°C
–40°C
09441-025
280
190
205
220
235
250
265
0 10,0008000600040002000
FREQUENCY (kHz)
LOAD CURRENT (mA)
V
IN
= 13V
V
IN
= 20V
V
IN
= 16.5V
+125°C
+25°C
–40°C
09441-026
330
240
250
260
270
280
290
300
310
320
0 15,00012,000 13,50010,500900075006000450030001500
FREQUENCY (kHz)
LOAD CURRENT (mA)
V
IN
= 20V
V
IN
= 13V
V
IN
= 16.5V
+125°C
+25°C
–40°C
09441-027