LTC3704 LINER [Linear Technology], LTC3704 Datasheet - Page 12

• Manufacturer Part Number: LTC3704
• Description: Wide Input Range, No RSENSE Positive-to-Negative DC/DC Controller
• Manufacturer: LINER [Linear Technology]

LTC3704
The resistor R1 is typically chosen to be less than 1M.
For applications where the RUN pin is only to be used as
a logic input, the user should be aware of the 7V
APPLICATIO S I FOR ATIO
12
U
SUPPLY
Figure 8a. Programming the Turn-On and Turn-Off Thresholds Using the RUN Pin
INPUT
U
+
–
CAPACITOR
OPTIONAL
FILTER
W
SUPPLY
INPUT
LOGIC CONTROL
Figure 8b. On/Off Control Using External Logic
EXTERNAL
Figure 8c. External Pull-Up Resistor On
RUN Pin for “Always On” Operation
+
–
R2
R1
1M
R2
U
RUN
V
RUN
GND
IN
V
RUN
GND
IN
6V
REFERENCE
1.248V
6V
1.248V
POWER
1.248V
Absolute Maximum Rating for this pin! The RUN pin can
be connected to the input voltage through an external 1M
resistor, as shown in Figure 8c, for “always on” operation.
6V
–
+
–
+
+
–
3704 F08b
COMPARATOR
COMPARATOR
RUN
COMPARATOR
RUN
RUN
3704 F08c
START-UP
BIAS AND
CONTROL
3704 F08a
sn3704 3704fs