MAX1676EVKIT Maxim Integrated, MAX1676EVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX1676EVKIT
• Description: Power Management IC Development Tools Evaluation Kit for the MAX1676
• Manufacturer: Maxim Integrated
• Series: MAX1674, MAX1675, MAX1676r

Specifications of MAX1676EVKIT

• Output Voltage: 3.3 V, 5 V
• Output Current: 420 mA, 285 mA

The MAX1676 has an additional comparator useful for
monitoring the input source’s voltage level. Resistors
R3 and R4 are connected as a voltage-divider
between the +VBATT pad and the MAX1676 LBI pin.
Note that a printed circuit trace across R4 shorts the
LBI pin to ground when this function is not used. Cut
the trace before installing R4.
Another location on the board facilitates the addition of
a pull-up resistor on the LBO output. The LBO output is
an open-drain output that can sink 1mA. Install resistor
R2 if an external circuit is to be driven from LBO.
Refer to the Low-Battery Detection section of the
MAX1674/MAX1675/MAX1676 data sheet for instruc-
tions on selecting values for resistors R2, R3, and R4.
The MAX1676 is initially set to output either 3.3V or 5V,
depending on the position of JU1. However, by adding
external resistors, the output can be adjusted from
2.0V to 5.5V. Remove the shunt on JU1 and add the
output voltage-divider resistors R5 and R6. The
Selecting the Output Voltage section of the MAX1674/
MAX1675/MAX1676 data sheet gives instructions
for calculating R5 and R6 values.
Figure 2. MAX1676 EV Kit Component Placement Guide—
Component Side
Using the Low-Battery Detector
1.0"
_______________________________________________________________________________________
Output Voltage Selection
MAX1676 Evaluation Kit
Figure 3. MAX1676 EV Kit PC Board Layout—Component Side
Figure 4. MAX1676 EV Kit PC Board Layout—Solder Side
1.0"
1.0"
3