LT3669 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3669 Datasheet PDF : 40 Pages
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LT3669/LT3669-2
TYPICAL APPLICATIONS
5V Buck, 3.3V LDO, COM2, 250mA Line Drivers
VOUT OR VLDO
RESET
I/O
I/O
µC I/O
I/O
I/O
I/O
I/O
I/O
100k
100k
L1
33µH CBST
0.22µF
100k 10k 10k
LT3669-2
BST
BD
SW
D1
FBOUT
CPOR
0.1µF
DA
SYNC
SR
CPOR
RT, 38.3k
RT
RILIM, 42.2k
ILIM
RST
SC1
SC2
WAKE
RXD1
LDOIN
LDO
FBLDO
AGND
DIO
VOUT
R3, 14k
R4
4.42k
TXEN1 EN/UVLO
TXD1
L+
TXEN2
Q2
TXD2
CQ1
GND
C1
470pF
C2
470pF
R1, 53.6k
R2
10.2k
VOUT, IOUT*
5V, 300mA
COUT
22µF
VLDO, ILDO*
3.3V, 150mA
CLDO
1µF
VL+, 7.5V TO 40V
TRANSIENT TO 60V
250mA
250mA
CL+
2
4.7µF
1
4
3
fSW = 600kHz
tRST = 12.5ms
L1: CDRH50D28RNP-330MC
* IOUT(MAX) IS 300mA AND ILDO(MAX) IS 150mA
(REMAINING AVAILABLE IOUT IS 300mA – ILDO)
36692 TA02
3.3V Buck, 1.8V LDO, COM2, 250mA Line Drivers
VOUT OR VLDO
RESET
I/O
I/O
µC I/O
I/O
I/O
I/O
I/O
I/O
100k
100k
L1
33µH CBST
0.22µF
100k 10k 10k
LT3669-2
BST
BD
SW
D1
FBOUT
CPOR
0.1µF
DA
SYNC
SR
RST
SC1
SC2
WAKE
RXD1
CPOR
RT, 63.4k
RT
RILIM, 42.2k
ILIM
LDOIN
VOUT
LDO
FBLDO
AGND
DIO
R3, 5.62k
R4
4.42k
TXEN1 EN/UVLO
TXD1
L+
TXEN2
Q2
TXD2
CQ1
GND
C1
470pF
C2
470pF
R1, 31.6k
R2
10.2k
VOUT, IOUT*
3.3V, 300mA
COUT
22µF
VLDO, ILDO*
1.8V, 150mA
CLDO
1µF
VL+, 7.5V TO 40V
TRANSIENT TO 60V
250mA
250mA
CL+
2
4.7µF
1
4
3
fSW = 400kHz
tRST = 12.5ms
L1: CDRH50D28RNP-330MC
* IOUT(MAX) IS 300mA AND ILDO(MAX) IS 150mA
(REMAINING AVAILABLE IOUT IS 300mA – ILDO)
36692 TA03
36
For more information www.linear.com/LT3669
3669fa
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