Datasheet

Dual-Output/Dual-Phase Select
(Mode Function)
The MAX5066 can operate as a dual-output, indepen-
dently regulated buck converter, or as a dual-phase,
single-output buck converter. The MODE input selects
between the two operating modes. When MODE is
grounded (logic-low), the MAX5066 operates as a two-
output DC-DC converter. When MODE is connected to
REG (logic-high), the MAX5066 works as a dual-phase,
single-output buck regulator with each phase 180° out-
of-phase with respect to each other.
Operating the MAX5066 as a single-output, dual-phase
DC-DC controller requires changes to the EV kit. Each
DC-DC controller should have identical external com-
ponents and the output of both DC-DC controllers
should be connected to form a single output. Refer to
the MAX5066 data sheet for selecting the appropriate
components.
Evaluating Other Output Voltages
The MAX5066 provides a programmed dual 0.8V out-
put (OUT1) and 1.3V output (OUT2). Both outputs can
also be adjusted from 0.61V to 5.5V by using resistive
voltage-dividers formed by R4, R5 and R6, R7.
The adjusted output voltages are:
V
OUT1
= 0.61V(1 + R4 / R5)
V
OUT2
= 0.61V(1 + R6 / R7)
Note: Refer to the MAX5066 data sheet for selection of
output capacitors, inductor, and network compensation
values for different output voltages.
Evaluates: MAX5066
MAX5066 Evaluation Kit
_______________________________________________________________________________________ 3
JU2 EN2 PIN OUT2
1 and 2
(default)
Connected to
VREG
OUT2 is enabled, V
OUT2
= 1.3V
2 and 3
Connected to
GND
OUT2 is disabled, V
OUT2
= 0V
Table 2. Jumper JU2 Functions
(Output 2 Enable Control)
JU3 Mode PIN OPERATING MODE
1 and 2
(default)
Connected to
VREG
MAX5066 operates as a single-
output, dual-phase buck
regulator
2 and 3
Connected to
GND
MAX5066 operates as a two-
output, out-of-phase buck
regulator
Table 3. Jumper JU3 Functions
(Mode Function)