24
LTC3737
3737fa
LT/TP 0205 1K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
TYPICAL APPLICATIO
U
PART NUMBER DESCRIPTION COMMENTS
LTC1628/LTC3728 Dual High Efficiency, 2-Phase Synchronous Constant Frequency, Standby, 5V and 3.3V LDOs, V
IN
to 36V,
Step Down Controllers 28-Lead SSOP
LTC1629/LTC3729 20A TO 200A PolyPhase
TM
High Efficiency Controllers Expandable Up to 12 Phases, No Heat Sinks, V
IN
to 36V,
28-Lead SSOP
LTC1702A No R
SENSE
TM
2-Phase Dual Synchronous Controller 550kHz, No Sense Resistor, GN24, V
IN
to 7V
LTC1735 High Efficiency Synchronous Step-Down Controller Burst Mode Operation, 16-Pin Narrow SSOP, Fault Protection,
3.5V ≤ V
IN
≤ 36V
LTC1772 Current Mode Step-Down DC/DC Controller 2.5V ≤ V
IN
≤ 9.8V, I
OUT
Up to 4A, SOT-23 Package, 550kHz
LTC1773 Synchronous Step-Down Controller 2.65V ≤ V
IN
≤ 8.5V, I
OUT
Up to 4A, 10-Lead MSOP
LTC1778 No R
SENSE
Synchronous Step-Down Controller Current Mode Operation Without Sense Resistor,
Fast Transient Response, 4V ≤ V
IN
≤ 36V
LTC1872 Constant Frequency Current Mode Step-Up Controller 2.5V ≤ V
IN
≤ 9.8V, SOT-23 Package, 550kHz
LTC1929 Constant Frequency Current Mode 2-Phase Up to 42A, No Heat Sink, 3.5V ≤ V
IN
≤ 36V
Synchronous Controller
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.8V, I
Q
= 60µA,
I
SD
= <1µA, MS Package
LTC3412 2.5A (I
OUT
), 4MHz, Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.8V, I
Q
= 60µA,
I
SD
= <1µA, TSSOP-16E Package
LTC3700 Constant Frequency Step-Down Controller with LDO Regulator 2.65≤ V
IN
≤ 9.8V, 550kHz, 10-Lead SSOP
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 2-Phase, Dual Synchronous Controller with Output Tracking Constant On-Time Dual Controller, V
IN
Up to 36V, Very Low
Duty Cycle Operation, 5mm × 5mm QFN Package
LTC3736 2-Phase, Dual Synchronous Controller with Output Tracking 2.75V ≤ V
IN
≤ 9.8V, 0.6V ≤ V
OUT
≤ V
IN
, 4mm × 4mm QFN
LTC3736-1 Low EMI, 2-Phase, Dual Synchronous Controller Spread Spectrum Frequency Modulation for Low Noise and EMI
PolyPhase and No R
SENSE
are trademarks of Linear Technology Corporation.
2-Phase, 300kHz, Resistor Sensing, Dual Output Step-Down DC/DC Converter
V
FB2
7
24
220pF
100pF
15k
R1
0.03Ω
1M
10Ω
1µF
220pF
100pF
15k
1
187k
59k
59k
118k
22 21 20 19
M1
D1
C1
47µF
C3
10µF
×2
V
IN
2.75V TO 9.8V
V
OUT1
2.5V
2A
C2
47µF
M2
L2
2.2µH
L1
2.2µH
8 6 10 11 12
PV
IN2
I
TH2
TRACK SW2 SENSE2
+
V
FB1
IPRG1
IPRG2
PLLLPF
SGND
V
IN
PGOOD
18
17
16
15
14
13
23
2
3
4
5
9
SYNC/MODE
PGATE1
PGND
PGATE2
RUN/SS
NC
NCI
TH1
SW1 SENSE1
+
LTC3737EUF
PV
IN1
D2
+
+
V
OUT2
1.8V
2A
3737 TA03
C1, C2: SANYO 6TPA47M
C3: TAIYO YUDEN LMK325BJ106K-T
D1, D2: CENTRAL CMSH1-20ML
L1, L2: COILCRAFT D03316P-22
M1, M2: Si3867DV
R2
0.03Ω
