SUPEVKIT Maxim Integrated, SUPEVKIT Datasheet - Page 4

• Manufacturer Part Number: SUPEVKIT
• Description: Power Management IC Development Tools Programmers, Development Systems
• Manufacturer: Maxim Integrated
• Series: SUPEVKITr

Specifications of SUPEVKIT

• Factory Pack Quantity: 1

voltage. Connect a voltmeter or oscilloscope to the TP
pad. Turn R18 clockwise until the voltage at TP goes
high (V
voltage goes low. The SUPEVKIT is now set to trip when
the supply voltage decreases to this voltage. To disable
undervoltage reset, open jumper JU4.
Potentiometer R19 sets the overvoltage reset threshold.
To enable the overvoltage reset feature, install the
jumpers in the positions specified in Table 5. Use a volt-
meter to set the power-supply voltage to the desired trip
voltage. Connect a voltmeter or oscilloscope to the TP
pad. Turn R19 clockwise until the voltage at TP goes
high (V
voltage goes low. The SUPEVKIT is now set to trip when
the supply voltage increases to this voltage. To disable
overvoltage reset, move JU2’s shunt to position 2-3.
Note: If the voltage at TP does not pull high after turning
R19 clockwise for 14 turns, turn R18 counterclockwise.
The undervoltage trip point might be set higher than the
supply voltage, holding the SUPEVKIT in reset.
The SUPEVKIT is relatively immune to short-duration
negative-going transients (glitches). If more immunity is
required, install 0.1µF bypass capacitors for C3 and C4.
Supervisory Circuit Evaluation Kit
Table 2. Selecting the Reset Timeout
Period
* Default jumper state.
Table 3. Capacitance Values for
Common Watchdog Timeout Periods
4
TIMEOUT (t
TIMEOUT PERIOD (ms)
_______________________________________________________________________________________
WATCHDOG
MINIMUM
1.12sec
17.9sec
4.3ms
CC
CC
71ms
MINIMUM
). Slowly turn R18 counterclockwise until the
). Slowly turn R19 counterclockwise until the
1120
140
20
1
WD
Negative-Going V
)
0.039µF ±20%
0.018µF ±20%
2200pF ±20%
1200pF ±20%
C1 VALUE
Overvoltage Setup
No cutting necessary*
CUT TRACE
BETWEEN:
C1 and C5
C5 and C6
C6 and C7
CC
JU1 STATE
Transients
2-3
2-3
1-2
1-2
Table 4. Undervoltage Setup
Table 5. Overvoltage Setup
Table 6. Jumper Function Table
* Default jumper state.
JUMPER STATE
JU1
JU2
JU3
JU4
JU5
JUMPER
JUMPER
Closed*
Closed*
Closed*
Open
Open
Open
Open
JU2
JU3
JU4
JU5
JU2
JU3
JU4
JU5
2-3*
2-3*
1-2
1-2
Watchdog-select connected to V
(extended mode).
Watchdog-select connected to GND
(normal mode).
Use R19 to set overvoltage threshold.
Disable overvoltage comparator.
Use OVRSTIN pad.
Use watchdog function (insert C2).
Disable watchdog function.
Use RSTIN1 pad.
Use R18 to set undervoltage threshold.
Use RSTIN2 pad.
Disable RSTIN2 undervoltage
comparator.
FUNCTION
STATE
STATE
Closed
Closed
Closed
Closed
Closed
Closed
2-3
1-2
CC