ADP1878/ADP1879
Data 4heet
601.0
900
880
860
840
820
800
780
760
740
720
700
+125°C
+25°C
–40°C
600.5
V
= 5V, V = 20V
IN
REG
600.0
599.5
599.0
598.5
598.0
597.5
597.0
V
= 5V, V = 13V
IN
REG
–40.0
–7.5
25.0
57.5
90.0
122.5
13.0
13.5
14.0
14.5
15.0
(V)
15.5
16.0
16.5
V
TEMPERATURE (°C)
IN
Figure 22. Feedback Voltage vs. Temperature
Figure 25. Switching Frequency vs. High Input Voltage, 1.0 MHz,
VIN Range = 13 V to 16.5 V
280
325
315
305
295
285
275
265
255
V
V
V
= 13V
= 20V
= 16.5V
+125°C
+25°C
–40°C
+125°C
+25°C
–40°C
NO LOAD
IN
IN
IN
265
250
235
220
205
190
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
0
2000
4000
6000
8000
10,000
V
(V)
LOAD CURRENT (mA)
IN
Figure 26. Frequency vs. Load Current, 300 kHz, VOUT = 0.8 V
Figure 23. Switching Frequency vs. High Input Voltage, 300 kHz, 10% of 12 V
330
320
310
300
290
280
270
260
250
240
650
V
V
V
= 20V
= 13V
= 16.5V
+125°C
+25°C
–40°C
+125°C
+25°C
–40°C
NO LOAD
IN
IN
IN
600
550
500
450
400
13.0 13.4 13.8 14.2 14.6 15.0 15.4 15.8 16.2
0
1500 3000 4500 6000 7500 9000 10,500 12,000 13,500 15,000
LOAD CURRENT (mA)
V
(V)
IN
Figure 27. Frequency vs. Load Current, 300 kHz, VOUT = 1.8 V
Figure 24. Switching Frequency vs. High Input Voltage, 600 kHz, VOUT = 1.8 V,
VIN Range = 13 V to 16.5 V
Rev. A | Page 10 of 40