MAX1845EVKIT Maxim Integrated, MAX1845EVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX1845EVKIT
• Description: Power Management IC Development Tools Evaluation Kit for the MAX1845
• Manufacturer: Maxim Integrated
• Series: MAX1845r

Table 5. Jumpers JU5/JU6/JU7 Functions (Switching-Frequency Selection)
IMPORTANT: Don’t change the operating frequency without first recalculating component values because the frequency has a signifi-
cant effect on the peak current-limit level, MOSFET heating, preferred inductor value, PFM/PWM switchover point, output noise, efficien-
cy, and other critical parameters.
Table 6. Jumper JU8 Functions
(Overvoltage Protection Selection)
Table 8. Jumper JU10 Functions
(Fixed/Adjustable Current-Limit Selection
for V
Not installed
Not installed
Installed
Not installed
Not installed
Not installed
SHORT
OPEN
JU10
Installed
JU8
OUT2
JU5
)
Connected to VCC
through a PC board
trace
Connected to REF
through resistor-
divider R13/R14.
Refer to the Current-
Limit Circuit section
in the MAX1845
data sheet for
information on
selecting R13/R14.
Connected to
VCC
Connected to
GND through
R9
Connected to
voltage
between 1.0V
and 1.8V
through REF
divider R9, R10
_______________________________________________________________________________________
ILIM2 PIN
Not installed
Installed
Not installed
Not installed
OVP PIN
JU6
OVP is disabled
OVP is enabled. OVP
threshold is 114% of
nominal.
OVP threshold set to
100% to 180% of
nominal V
V
divider R9, R10
50mV (default)
Adjustable between
30mV and 250mV
OVP THRESHOLD
OUT2
CURRENT-LIMIT
THRESHOLD
Not installed
Not installed
Not installed
Installed
according to
OUT1
JU7
and
MAX1845 Evaluation Kit
Floating
Connected to VCC
Connected to REF
Connected to GND
Table 7. Jumper JU9 Functions
(Undervoltage Protection Selection)
Table 9. Jumper JU11 Functions
(Fixed/Adjustable Current-Limit Selection
for V
Not installed
SHORT
OPEN
JU11
Installed
JU9
OUT1
TON PIN
)
Connected to VCC
through a PC board
trace
Connected to REF
through resistor-
divider R11/R12.
Refer to the
Current-Limit Circuit
section in the
MAX1845 data
sheet for
information on
selecting R11/R12.
Connected to
VCC through
R15
Connected to
GND
ILIM1 PIN
UVP PIN
255/345 (as shipped)
170/235
355/485
460/620
V
OUT1
/V
50mV (default)
Adjustable between
30mV and 250mV
UVP is enabled. UVP
threshold is 70% of
nominal.
UVP is disabled
OUT2
UVP THRESHOLD
CURRENT-LIMIT
(kHz)
THRESHOLD
FREQUENCY
3