Datasheet

LTC3736-2
28
37362fb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2005
LT 0109 REV B • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LTC1735 High Effi ciency Synchronous Step-Down Controller Burst Mode Operation, 16-Pin Narrow SSOP, 3.5V ≤ V
IN
≤ 36V
LTC1778 No R
SENSE
™ Synchronous Step-Down Controller Current Mode Operation Without Sense Resistor, Fast Transient
Response, 4V ≤ V
IN
≤ 36V
LTC2923 Power Supply Tracking Controller Controls Up to Three Supplies, 10-Lead MSOP
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, I
Q
= 60μA, I
SD
= <1μA, MS Package
LTC3416 4A (I
OUT
), 4MHz, Synchronous Step-Down DC/DC
Converter with Output Tracking
95% Effi ciency, V
IN
: 2.25V to 5.5V, I
SD
= <1μA, TSSOP-20E Package
LTC3418 8A, 4MHz Synchronous Step-Down Regulator
V
IN
: 2.25V to 5.5V, 5mm × 7mm QFN Package
LTC3701 2-Phase, Low Input Voltage Dual Step-Down DC/DC
Controller
2.5V ≤ V
IN
≤ 9.8V, 550kHz, PGOOD, PLL, 16-Lead SSOP
LTC3708 Fast 2-Phase, No R
SENSE
Buck Controller with
Output Tracking
Constant On-Time Dual Controller, V
IN
Up to 36V, Very Low Duty Cycle
Operation, 5mm × 5mm QFN Package
LTC3728/LTC3728L Dual, 550kHz, 2-Phase Synchronous Step-Down
Switching Regulator
Constant Frequency, V
IN
to 36V, 5V and 3.3V LDOs, 5mm × 5mm QFN or
28-Lead SSOP
LTC3736 Dual, 2-Phase, No R
SENSE
Synchronous Controller 2.75V ≤ V
IN
≤ 9.8V, Output Tracking
LTC3736-1 Dual, 2-Phase, No R
SENSE
Synchronous Controller
with Spread Spectrum
V
IN
: 2.75V to 9.8V, 4mm × 4mm QFN Package Spread Spectrum
Operation; Output Tracking
LTC3737 Dual, 2-Phase, No R
SENSE
Controller with Output Tracking
Nonsynchronous Constant Frequency with PLL, 4mm × 4mm QFN and
24-Lead SSOP Packages
LTC3772 No R
SENSE
Step-Down DC/DC Controller
2.75V ≤ V
IN
≤ 9.8V, SOT-23 or 3mm × 2mm DFN Packages
LTC3776 Dual, 2-Phase, No R
SENSE
Synchronous Controller for
DDR/QDR Memory Termination
Provides V
DDQ
and V
TT
with One IC, 2.75V ≤ V
IN
≤ 9.8V, 4mm × 4mm
QFN and 24-Lead SSOP Packages
LTC3808 No R
SENSE
, Low EMI, Synchronous Step-Down Controller
with Output Tracking
2.75V ≤ V
IN
≤ 9.8V; Spread Spectrum Operation; 3mm × 4mm DFN and
16-Lead SSOP Packages
LTC3809/LTC3809-1 No R
SENSE
Synchronous Step-Down Controllers
2.75V to 9.8V, 3mm × 3mm DFN and 10-Lead MSOPE Packages
No R
SENSE
is a trademark of Linear Technology Corporation.
2-Phase, 750kHz, Dual Output Synchronous DC/DC Converter
SGND
PLLLPF
IPRG2
IPRG1
V
FB1
I
TH1
SW1
R
VIN
10Ω
R
ITH2
22k
C
ITH2
1000pF
C
SS
10nF
C
IN
22μF
C
VIN
1μF
V
IN
3.3V
V
IN
C
ITH2A
100pF
R
ITH1
22k
C
ITH1
1000pF
C
ITH1A
100pF
R
FB1B
, 187kR
FB1A
, 59k
PGOOD
V
FB2
TRACK
PGND
I
TH2
TG2
LTC3736EUF-2
PGND
TG1
SYNC/FCB
BG1
PGND
22
21
20
19
18
17
16
15
14
13
12
11
10
25
23
24
1
2
3
4
5
9
8
7
6
SENSE1
+
MP1
Si3447BDV
MP2
Si3447BDV
L1
1.5μH
L2
1.5μH
MN1
Si3460DV
MN2
Si3460DV
RUN/SS
BG2
PGND
SW2
SENSE2
+
R
TRACKB
, 118kR
TRACKA
, 59k
R
FB2A
, 59k R
FB2B
, 118k
C
OUT2
47μF
s2
C
OUT1
47μF
s2
D1
V
OUT1
2.5V
4A
V
OUT2
1.8V
4A
37362 TA02
C
FF1
22pF
L1, L2: VISHAY IHLP-2525CZ
-
D1, D2: OPTIONAL
D2