Datasheet

ADP1870/ADP1871 Data Sheet
Rev. B | Page 10 of 44
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
08730-121
Figure 22. Feedback Voltage vs. Temperature
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
08730-022
Figure 23. Switching Frequency vs. High Input Voltage, 300 kHz, ±10% of 12 V
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
08730-123
Figure 24. Switching Frequency vs. High Input Voltage, 600 kHz, V
OUT
= 1.8 V,
V
IN
Range = 13 V to 16.5 V
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
08730-124
Figure 25. Switching Frequency vs. High Input Voltage, 1.0 MHz,
V
IN
Range = 13 V to 16.5 V
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
08730-025
Figure 26. Frequency vs. Load Current, 300 kHz, V
OUT
= 0.8 V
330
240
250
260
270
280
290
300
310
320
0 15,0012,000 13,50010,500900075006000450030001500
FREQUENCY (kHz)
LOAD CURRENT (mA)
V
IN
= 20V
V
IN
= 13V
V
IN
= 16.5V
+125°C
+25°C
–40°C
08730-026
Figure 27. Frequency vs. Load Current, 300 kHz, V
OUT
= 1.8 V