Datasheet

SHUNT
POSITION
EN1 PIN VOUT
Installed
Connected to
PSUP
Enabled
Not installed
Connected
to ground
through R1
Disabled or external
source applied at EN1
and GND PCB pads
SHUNT
POSITION
PWM PIN SWITCHING MODE
Installed
Connected to
PSUP
Forced PWM
Not installed
Connected to
GND through
R2
Skip
MAX16962R Evaluation Kit
Evaluates: MAX16962R
3Maxim Integrated
Reconfiguring the EV kit circuit for a new output voltage
may require replacing inductor L1 and capacitors C1–C4.
To select new values for inductor L1 and capacitors C1–
C4, refer to the Inductor Selection, Output Capacitor, and
Input Capacitor sections in the MAX16962 IC data sheet.
Enable Control (JU1)
Jumper JU1 configures the EV kit output for turn-on/turn-
off control. Install a shunt to enable the output. Remove
the shunt to disable the EV kit output. VOUT can also
be enabled by applying an external signal greater than
1.95V (typ) at the EN1 and GND PCB pads. See Table 1
for proper JU1 configuration.
Switching Mode of Operation (JU2)
Jumper JU2 configures the EV kit for forced-PWM, or
skip-mode operation. In PWM mode, the converter
switches at a constant frequency with variable on-time.
In skip mode, the converter’s switching frequency is
load dependent until the output load reaches a certain
threshold. Install a shunt to operate the EV kit in forced-
PWM mode. Remove the shunt to operate in skip mode.
See Table 2 for proper JU2 configuration. Use the PWM
PCB pad for monitoring the logic voltage at the PWM pin.
Power-Good Output (PG1)
The EV kit provides a PCB pad to monitor the status of
the power-good PG1 output. The PG1 output can be
used as a system reset signal during power-up. PG1 is
high after V
OUT
rises 10% above its programmed output
voltage. PG1 is pulled up to PSUP using resistor R4. The
PG1 output is pulled low when the V
OUT
drops below
92% (typ) of its nominal set voltage or rises 10% above
its nominal set voltage.
Synchronization Input (SYNC)
The EV kit’s SYNC PCB pad can be used to synchronize
the IC with an external digital clock in the 1.75MHz to
2.5MHz range. When SYNC is driven with an external
digital clock, the IC synchronizes to the rising edge of
the external clock.
The digital square-wave clock source must provide the
following signal qualities:
Output voltage:
• Logic-low = 0 to 0.4V
• Logic-high = 1.8V to PSUP
To use external synchronization, connect the external
square-wave clock to the SYNC and GND PCB pads.
Table 1. Enable Control (JU1) Table 2. Mode of Operation (JU2)