MAX13413EESA Datasheet, PDF (22/24 Pages) Maxim Integrated Products – RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control

RS-485 Transceiver with Integrated Low-Dropout
Regulator and AutoDirection Control
R_t
ISO_V_CC
V_SYS
UNREGULATED ISOLATED
POWER SUPPLY
ISO_V_CC
+
V_SYS
MCU AND
RELATED
CIRCUITRY
V_SYS
RO
1
R
ISO_V_CC
DE/RE
2
ISO_V_CC
V_{REG 3}
C_S
1μF
DI
4
D
LDO 8 ^VCC
0.1μF
B
7
A
6
GND
5
MAX13414E
MAX13415E
R_t
Figure 11. Typical Application Circuit for the MAX13414E/MAX13415E
ON / OFF
V_IN 5V
V_SUPPLY
4
6
SD
V_CC
1
C1
CR1
OUTPUT
5V AT 150mA
V_OUT
D1
MAX845
3
FS
FREQUENCY
8
D2
T1
SELECT _{GND1 GND2}
2
7
C2
C3
CR2
V_CC
V_IN
MAX5021/
MAX5022
OPTO
NDRV
Figure 12. Using the MAX845 to Obtain an Isolated Power Supply
GND ^CS
Figure 13. The MAX5021 and MAX5022 provide an isolated
power supply with tighter regulation due to feedback using an
opto-isolator coupler.
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