MAX1549 Datasheet, PDF (4/11 Pages) Maxim Integrated Products – MAX1549 Evaluation Kit

MAX1549 Evaluation Kit
Evaluating Other Dynamic
Output Voltages (OUT1)
The EV kit output is preset to 0.7V/1.0V/1.3V/1.5V
(OUT1). G0 (JU4) and G1 (JU5) gate inputs select the
OUT1 voltage (see Table 4). However, OUT1 can also
be adjusted between 0.5V and 2.0V by selecting R10–
R14 values. Refer to the MAX1549 data sheet Output
Voltage section for more information.
Evaluating Other Fixed
Output Voltages (OUT2)
The MAX1549 provides a fixed 2.5V output (OUT2)
when FB2 is connected to GND (R20 = open, R21 = 0,
R19 = open) or a fixed 1.8V output when FB2 is con-
nected to VCC (R20 = open, R21 = open, R19 = 0).
OUT2 can also be adjusted from 0.5V to 2.7V by using
a resistive voltage-divider formed by R20 and R21 (R19
= open). The MAX1549 regulates FB2 to a fixed refer-
ence voltage (0.5V).
The adjusted output voltage is:
V_OUT2 = V_FB2(1 + R20 / R21) where V_FB2 = 0.5V
A 330pF to 1000pF feed-forward bypass capacitor (C26)
reduces duty-cycle jitter and feedback noise.
Refer to the MAX1549 data sheet for selection of out-
put-capacitor and inductor values for different output
voltages.
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