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Part Name
Description
LT3669 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3669
IO-Link Transceiver with Integrated Step-Down Regulator and LDO
Linear Technology
LT3669 Datasheet PDF : 40 Pages
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LT3669/LT3669-2
BLOCK DIAGRAM
LT3669-2
–
BASE
+
CTRL
ENABLE EN
0.794V
V
LDO
C
LDO
LDO
19
R3
20
FB
LDO
R4
LOW DROPOUT LINEAR REGULATOR
3V
EN
SOFT START
C
POR
CPOR
27
RST
28
POWER-ON
RESET
CONTROL
RST
FB
LDO
FB
OUT
0.736V
–
+
SLOPE COMP
OSCILLATOR
250kHz TO 2.2MHz
RQ
S QB
SWITCH
DRIVER
EN
SYNC
DISABLE
LDO
IN
18
BOOST
DIODE
BD
17
BST
16
SW
15
DA
14
V
OUT
C
OUT
C
BST
L
D1
V
C
V
C
CLAMP
SYNC
24
RT
22
0.794V
SOFT-START
EN
R
T
R1
FB
OUT
21
3V
REFERENCE
R2
0.794V
GENERATOR
EN/UVLO
0.736V
TEMPERATURE
12
EN
AND VOLTAGE
THSD
MONITORING
DIO
13
WAKE
3
1
SC1
5
TXEN1
6
TXD1
RXD1
4
RX
SC2
2
TXEN2
7
TXD2
8
25
SR
26
ILIM
EN
THSD
ENABLE
THSD
RST
WAKE-UP
DETECT
WAKE
SC
Q
DRIVER 1
CONTROL
SLEW RATE
CONTROL
EN
THSD
ENABLE
THSD
SC
Q
DRIVER 2
CONTROL
SLEW RATE
CONTROL
For more information
www.linear.com/LT3669
L+
11
C
L+
CQ1
10
C1
L+
1
2
4 C/Q
Q2
3
L–
Q2
9
C2
GND 29
AGND 23
36692 BD2
3669fa
15
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