Datasheet

LT3509
24
3509fd
For more information www.linear.com/LT3509
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
 LINEAR TECHNOLOGY CORPORATION 2007
LT 0116 REV D • PRINTED IN USA
[phone]
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FAX: [phone]
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www.linear.com/LT3509
relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
LT1766 60V, 1.2A (I
OUT
), 200kHz, High Efficiency Step-Down DC/DC Converter V
IN
: 5.5V to 60V, V
OUT
= 1.20V, I
Q
= 2.5mA, I
SD
< 25µA, TSSOP16/E
Package
LT1936 36V, 1.4A (I
OUT
) , 500kHz High Efficiency Step-Down DC/DC Converter V
IN
: 36V to 36V, V
OUT
= 1.20V, I
Q
= 1.9mA, I
SD
< 1µA, MS8E
Package
LT1939 25V, 2A, 2.5MHz High Efficiency DC/DC Converter and LDO Controller V
IN
: 3.6V to 25V, V
OUT
= 0.8V, I
Q
= 2.5µA, I
SD
< 10µA, 3mm × 3mm
DFN-10
LT1976/
LT1977
60V, 1.2A (I
OUT
), 200/500kHz, High Efficiency Step-Down
DC/DC Converter with Burst Mode
®
Operation
V
IN
: 3.3V to 60V, V
OUT
= 1.20V, I
Q
= 100µA, I
SD
< 1µA, TSSOP16E
Package
LT3434/
LT3435
60V, 2.4A (I
OUT
), 200/500kHz, High Efficiency Step-Down
DC/DC Converter with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT
= 1.20V, I
Q
= 100µA, I
SD
< 1µA, TSSOP16E
Package
LT3437 60V, 400mA (I
OUT
), MicroPower Step-Down DC/DC Converter
with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT
= 1.25V, I
Q
= 100µA, I
SD
< 1µA, 3mm × 3mm
DFN-10, TSSOP-16E Package
LT3480 36V with Transient Protection to 60V
, 2A (I
OUT
), 2.4MHz, High
Efficiency Step-Down DC/DC Converter with Burst Mode Operation
V
IN
: 3.6V to 38V, V
OUT
= 0.78V, I
Q
= 70µA, I
SD
< 1µA, 3mm × 3mm
DFN-10, MSOP-10E Package
LT3481 34V with Transient Protection to 36V
, 2A (I
OUT
), 2.8MHz, High
Efficiency Step-Down DC/DC Converter with Burst Mode Operation
V
IN
: 3.6V to 34V, V
OUT
= 1.26V, I
Q
= 50µA, I
SD
< 1µA, 3mm × 3mm
DFN-10, MSOP-10E Package
LT3493 36V, 1.4A(I
OUT
), 750kHz High Efficiency Step-Down DC/DC
Converter
V
IN
: 36V to 36V, V
OUT
= 0.8V, I
Q
= 1.9mA, I
SD
< 1µA, 2mm × 3mm
DFN-6 Package
LT3500 36V, 40Vmax, 2A, 2.5MHz High Efficiency DC/DC Converter
and LDO Controller
V
IN
: 3.6V to 36V, V
OUT
= 0.8V, I
Q
= 2.5mA, I
SD
< 10µA, 3mm × 3mm
DFN-10
LT3501 25V, Dual 3A (I
OUT
), 1.5MHz High Efficiency Step-Down
DC/DC Converter
V
IN
: 3.3V to 25V, V
OUT
= 0.8V, I
Q
= 3.7mA, I
SD
= 10µA, TSSOP-20E
Package
LT3505 36V with Transient Protection to 40V, 1.4A (I
OUT
), 3MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 34V, V
OUT
= 0.78V, I
Q
= 2mA, I
SD
< 2µA, 3mm × 3mm
DFN-8, MSOP-8E Package
LT3506/
LT3506A
25V, Dual 1.6A (I
OUT
), 575kHz,/1.1MHz High Efficiency
Step-Down DC/DC Converter
V
IN
: 3.6V to 25V, V
OUT
= 0.8V, I
Q
= 3.8mA, I
SD
= 30µA, 5mm × 4mm
DFN-16 TSSOP-16E Package
LT3507 36V 2.5MHz, Triple (2.4A + 1.5A + 1.5A (I
OUT
)) with LDO
Controller High Efficiency Step-Down DC/DC Converter
V
IN
: 4V to 36V, V
OUT
= 0.8V, I
Q
= 7mA, I
SD
= 1µA, 5mm × 7mm
QFN-38
LT3508 36V with Transient Protection to 40V
, Dual 1.4A (I
OUT
), 3MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.7V to 37V, V
OUT
= 0.8V, I
Q
= 4.6mA, I
SD
= 1µA, 4mm × 4mm
QFN-24, TSSOP-16E Package
LT3510 25V, Dual 2A (I
OUT
), 1.5MHz High Efficiency Step-Down
DC/DC Converter
V
IN
: 3.3V to 25V, V
OUT
= 0.8V, I
Q
= 3.7mA, I
SD
= 10µA, TSSOP-20E
Package
LT3684 34V with Transient Protection to 36V, 2A (I
OUT
), 2.8MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 34V, V
OUT
= 1.26V, I
Q
= 850µA, I
SD
< 1µA, 3mm × 3mm
DFN-10, MSOP-10E Package
LT3685 36V with Transient Protection to 60V
, 2A (I
OUT
), 2.4MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 38V, V
OUT
= 0.78V, I
Q
= 70µA, I
SD
< 1µA, 3mm × 3mm
DFN-10, MSOP-10E Package
3509 TA02
LT3509
GND
RTSYNC
DA1
FB1
RUN/SS1
DA2
FB2
RUN/SS2
BDV
IN
BOOST2BOOST1
SW2SW1
MBRM140
MBRM140
4.7µH
0.1µF
0.1µF
2.2µF
6.8µH
V
OUT
5V
0.7A
V
OUT
3.3V
0.7A
10µF
22nF
10k
16.9k
52.3k
31.6k
10µF
22nF
10k
V
IN
6.5V TO 16V
(TRANSIENT TO 60V)
f
SW
= 2MHz
2MHz, 5V and 3.3V Outputs
Typical applicaTions
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