Datasheet
LTM4624
11
4624fb
For more information www.linear.com/LTM4624
APPLICATIONS INFORMATION
Output voltage tracking can also be programmed externally
using the TRACK/SS pin. The output can be tracked up
and down with another regulator. Figure 2 and Figure3
show an example waveform and schematic of ratiometric
tracking where the slave regulator’s output slew rate is
proportional to the master’s.
Since the slave regulator’s TRACK/SS is connected to
the master’s output through a R
TR(TOP)
/R
TR(BOT)
resistor
divider and its voltage used to regulate the slave output
voltage when TRACK/SS voltage is below 0.6V, the slave
TIME
SLAVE OUTPUT
MASTER OUTPUT
OUTPUT VOLTAGE
4624 F02
Figure 2. Output Ratiometric Tracking Waveform
FREQ
V
IN
SV
IN
RUN
INTV
CC
MODE
TRACK/SS
PGOOD
V
OUT
FB
COMP
GND SGND
R
FB(MA)
40.2k
LTM4624
10µF
16V
V
IN
4V TO 15V
V
OUT(MA)
1.5V
4A
47µF
6.3V
R
TR(BOT)
40.2k
R
FB(SL)
60.4k
R
TR(TOP)
60.4k
FREQ
V
IN
SV
IN
RUN
INTV
CC
MODE
TRACK/SS
PGOOD
V
OUT
FB
COMP
GND SGND
4624 F03
LTM4624
10µF
16V
V
OUT(SL)
1.2V
4A
47µF
6.3V
Figure 3. Example Schematic of Ratiometric Output Voltage Tracking