Specifications

www.digikey.com/maxim-industrial 39
Programmable logic controllers (PLCs)
Isolated power-supply functions
Benefits
• Eliminate external components to
simplify power design
– Connect directly to the industrial
backplane across a wide voltage range
• Cut costs by eliminating external
hot-swap controller and switch
MAX5042/MAX5043
The MAX5042/MAX5043 are isolated, multimode, pulse-width-
modulated (PWM) power ICs. They feature integrated switching
power MOSFETs connected in a voltage-clamped, two-transistor,
power-circuit configuration. These devices operate from a wide
20V to 76V input voltage range. The MAX5042 includes a hot-swap
controller to plug into a live power backplane with a MAX5058/
MAX5059 rectifier driver. Operating at up to a 500kHz switching
frequency, these devices provide up to 50W of output power.
Simplify industrial-bus power design with integrated hot-swap controllers and FETs
that power devices
RAMP
RCFF
REG9
DRVIN
FLTINT
DRVDEL
SYNC
PWMSD
REG5
R22
10kΩ
C25
0.22µF
R20
10kΩ
R14
10kΩ
R13
1MΩ
C12
0.1µF
C3
1µF
C9
220pF
R12
200kΩ
1%
C20
0.1µF
100V
C1
220µF
100V
C30
0.68µF
100V
V
IN+
32V TO 72V
NEGIN
C13
1µF
R15
24.9kΩ
1%
C14
100pF
RCOSC
C11
0.1µF
CSS
N1
(HOT-SWAP MOSFET)
NEGIN HSGATE HSDRAIN
PWMNEG,
CSN
PWMPNEG OPTO
R21
1.24kΩ
1%
C6
0.1µF
BST
XFRMRH
XFRMRL
C7
1µF
R9
15Ω
D4
R10
33mΩ
1%
D1
D2
REG15
CSP, SRC
POSINPWM
HSEN
DRNH UVLO
R6
200Ω
1%
C8
0.33µF
R11
20Ω
1%
C16
0.001µF
C5
0.0047µF
D3
L1
4.4µH
C17
150µF
6.3V
C18
150µF
6.3V
C4
0.1µF
5V
8A
SGND
R1
25.5kΩ
1%
R2
8.25kΩ
1%
R5
10Ω
1%
R4
10Ω
C15
0.1µF
C19
0.15µF
R3
150Ω
1%
U2
FOD2712
E
C
LED
FB
COMP
GND
U1
T1
MAX5042
MAX5042 typical application circuit, a 48V power supply with hot-swap capability.