LTC3615 LINER [Linear Technology], LTC3615 Datasheet - Page 10

• Manufacturer Part Number: LTC3615
• Description: Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter
• Manufacturer: LINER [Linear Technology]

LTC3615
pin FuncTions
TRACK/SS1 (Pin 21/Pin 24): Internal, External Soft-
Start, External Reference Input for Channel 1. The type
of start-up behavior for channel 1 is programmable with
the TRACK/SS1 pin:
1. Internal soft-start with a fixed timing can be programmed
2. External soft-start can be programmed with the timing
3. Tracking the start-up behavior of another supply is
4. The pin can be used as external reference input.
ITH1 (Pin 22/Pin 1): Error Amplifier Compensation. Con-
nection for external compensation from ITH to SGND.
The current comparator’s threshold increases with this
control voltage. Tying this pin to SV
with internal compensation.
V
Channel 1. Receives the feedback voltage for channel 1
from the external resistive divider across the output.
0
FB1
by tying TRACK/SS1 to SV
set by a capacitor to ground and a resistor to SV
programmable (see the Applications Information
section).
(Pin 23/Pin 2): Voltage Feedback Input Pin for
(FE/UF)
IN
.
IN
enables AVP mode
IN
.
MODE (Pin 24/Pin 3): Mode Selection.
1. Tying the MODE pin to SV
2. If this pin is held at slightly higher than half of SV
3. Connecting this pin to an external voltage will select
PGND (Exposed Pad Pin 25/ Exposed Pad Pin 25): Power
Ground. The exposed pad connects to the sources of the
power N-channel MOSFETs. The PGND pin is common
for both channels. The exposed pad must be soldered
to the PCB.
For electrical connection and rated thermal performance,
refer to the Operation and Applications Information sec-
tions for more information.
skipping mode or Burst Mode operation (with an internal
Burst Mode clamp), respectively.
forced continuous mode will be selected.
Burst Mode operation with the burst clamp set to the
pin voltage.
IN
or SGND enables pulse-
3615f
IN
,