Specifications

42 Maxim Industrial Solutions
Programmable logic controllers (PLCs)
Isolated power-supply functions
Benefits
• Simplify design by connecting directly
to an industrial power backplane
• Save cost by integrating switches and
voltage-mode controller
MAX5080/MAX5081
The MAX5080/MAX5081 are 250kHz, PWM, step-down DC-DC
converters with an on-chip high-side switch. The input voltage range
is 4.5V to 40V for the MAX5080 and 7.5V to 40V for the MAX5081.
The devices’ output is adjustable from 1.23V to 32V and can deliver
up to 1A of load current. Both devices utilize a voltage-mode control
scheme for good noise immunity in a high-voltage switching
environment. External compensation allows maximum flexibility
with a wide selection of inductor values and capacitor types.
Save cost with integrated DC-DC converters that power off an industrial bus
Typical operating circuit for the MAX5080.
V
IN
4.5V TO 40V
ON/OFF
C1
R1
R2
C2
PGND
REG
LX
FB
IN
SYNC SGND PGND SS COMP
DVREG
C-
C
F
V
OUT
PGND
C
BST
C
SS
D1
D2
L1
C8
C5
R6
R5
C+
BST
C7
C6
R3
R4
MAX5080