MAX16052_10 Datasheet, PDF (10/12 Pages) Maxim Integrated Products – High-Voltage, Adjustable Sequencing/Supervisory Circuits

High-Voltage, Adjustable
Sequencing/Supervisory Circuits
Typical Application Circuits
Figures 4–6 show typical applications for the
MAX16052/MAX16053. Figure 4 shows the MAX16052
used with a p-channel MOSFET in an overvoltage pro-
tection circuit. Figure 5 shows the MAX16053 in a low-
voltage sequencing application using an n-channel
MOSFET. Figure 6 shows the MAX16053 used in a mul-
tiple output sequencing application.
Using an n-Channel Device
for Sequencing
In higher power applications, using an n-channel
device reduces the loss across the MOSFET as it offers
a lower drain-to-source on-resistance. However, an n-
channel MOSFET requires a sufficient V_GS voltage to
fully enhance it for a low R_{DS_ON}. The application
shown in Figure 5 shows the MAX16053 in a switch
sequencing application using an n-channel MOSFET.
Similarly, if a higher voltage is present in the system, the
open-drain version can be used in the same manner.
Power-Supply Bypassing
In noisy applications, bypass V_CC to ground with a
0.1µF capacitor as close to the device as possible. The
additional capacitor improves transient immunity. For
fast-rising V_CC transients, additional capacitors may be
required.
3.3V ALWAYS-ON
0 TO 28V
R1
R2
P
EN V_CC
R_PULLUP
OUT
MAX16052
IN
CDELAY
GND
C_CDELAY
MONITORED
3.3V
R1
R2
5V BUS
1.2V
INPUT
1.2V
N ^OUTPUT
EN V_CC
OUT
MAX16053
IN
CDELAY
GND
C_CDELAY
Figure 4. Overvoltage Protection
Figure 5. Low-Voltage Sequencing Using an n-Channel MOSFET
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