Digi JACKRABBIT BL1800 - Manual (Page 85)

User’s Manual 81
The switching voltage regulator is used when there is a need for an additional range in the
external input voltage or when lower power consumption is desired. The input voltage
range is from 8 V to 40 V.
Figure C-3 shows typical power operating curves for both the linear regulator (BL1810
and BL1820) and the switching regulator (BL1800) for a nonloaded Jackrabbit operating
at 14.74 MHz with the programming cable connected.
Figure C-3. Typical Jackrabbit Current Consumption
5 10 15 20 25 30 35
125
100
75
50
25
0
Current (mA)
DCIN (V)
40
Switching regulator
(BL1800 @ 29.49 MHz)
Linear regulator
(BL1810 and BL1820 @ 14.7 MHz)