LT3669 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3669 Datasheet PDF : 40 Pages
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LT3669/LT3669-2
TYPICAL APPLICATION
Complete 24V 3-Wire Power and Signaling Interface (COM3) to Master
(One of Four Available Master Ports Is Shown)
82µH
VOUT
OR
VLDO
0.1µF
10k
RESET
I/O
I/O
µC I/O
I/O
I/O
I/O
I/O
I/O
LT3669
BD
FBOUT
SW
CPOR
BST
RT
SR
ILIM
SYNC
RST
SC1
SC2
WAKE
RXD1
LDOIN
LDO
FBLDO
AGND
DIO
TXEN1 EN/UVLO
TXD1
L+
TXEN2
Q2
TXD2
CQ1
GND
38.3k
0.1µF
VOUT
14k
4.42k
470pF
470pF
53.6k
VOUT, IOUT*
5V, 100mA
10.2k
10µF
24V
100µF
VLDO, ILDO*
3.3V, 100mA
1µF
UP TO
20 METERS
VL+, 7.5V TO 40V
TRANSIENT TO 60V
0.2Ω
Q1
10Ω
200mA
100mA
100mA
4.7µF
1
2
4
3
1
52
4
3
100mA
1/4
LTC2874
VL
VDD
1µF
SENSE+
IRQ
SDI
SCK
SENSE–1
CS
SDO
GATE1
RXD1
L+1
TXEN1
CQ1
TXD1
1µF
GND
fSW = 600kHz
tRST = 12.5ms
* IOUT(MAX) IS 100mA AND ILDO(MAX) IS 100mA
(REMAINING AVAILABLE IOUT IS 100mA – ILDO)
Q1: FQT7N10
2.9V TO 5.5V
0.1µF
4.7k
I/O
I/O
I/O
I/O µC
I/O
I/O
I/O
I/O
36692 TA06
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40 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950F3o5r -m7o4r1e7information www.linear.com/LT3669
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT3669
3669fa
LT 0215 REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2014
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