LTC3737 Datasheet, PDF (24/24 Pages) Linear Technology – Dual 2-Phase, No RSENSE DC/DC Controller with Output Tracking

LTC3737
TYPICAL APPLICATIO
2-Phase, 300kHz, Resistor Sensing, Dual Output Step-Down DC/DC Converter
187k
59k
59k
118k
100pF
1µF
10Ω
1M
220pF
15k
M1
24 1 22
21
20 19 R1
V_FB1 I_TH1 SW1 SENSE1⁺ PV_IN1 NC ^0.03Ω
23
IPRG1
18
SYNC/MODE
2
IPRG2
17
PGATE1
3
PLLLPF
4
SGND
LTC3737EUF
16
PGND
15
PGATE2
5
V_IN
9
PGOOD
14
RUN/SS
13
NC
V_FB2 I_TH2 TRACK SW2 SENSE2⁺ PV_IN2
7 8 6 10 11 12
R2
0.03Ω
220pF
15k
M2
L1
2.2µH
D1
C1
47µF
+
C2
D2 _47µF
L2
2.2µH
V_IN
2.75V TO 9.8V
V_OUT1
2.5V
2A
C3
10µF
×2
V_OUT2
1.8V
2A
100pF
3737 TA03
C1, C2: SANYO 6TPA47M
L1, L2: COILCRAFT D03316P-22
C3: TAIYO YUDEN LMK325BJ106K-T M1, M2: Si3867DV
D1, D2: CENTRAL CMSH1-20ML
RELATED PARTS
PART NUMBER
LTC1628/LTC3728
LTC1629/LTC3729
DESCRIPTION
Dual High Efficiency, 2-Phase Synchronous
Step Down Controllers
20A TO 200A PolyPhase^TM High Efficiency Controllers
LTC1702A
LTC1735
No R_SENSE^TM 2-Phase Dual Synchronous Controller
High Efficiency Synchronous Step-Down Controller
LTC1772
LTC1773
LTC1778
LTC1872
LTC1929
LTC3411
LTC3412
Constant Frequency Current Mode Step-Down
DC/DC Controller
Synchronous Step-Down Controller
No R_SENSE Synchronous Step-Down Controller
Constant Frequency Current Mode Step-Up Controller
Constant Frequency Current Mode 2-Phase
Synchronous Controller
1.25A (I_OUT), 4MHz, Synchronous Step-Down DC/DC Converter
2.5A (I_OUT), 4MHz, Synchronous Step-Down DC/DC Converter
LTC3700
LTC3701
LTC3708
Constant Frequency Step-Down Controller with LDO Regulator
2-Phase, Low Input Voltage Dual Step-Down DC/DC Controller
2-Phase, Dual Synchronous Controller with Output Tracking
LTC3736
2-Phase, Dual Synchronous Controller with Output Tracking
PolyPhase and No R_SENSE are trademarks of Linear Technology Corporation.
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
COMMENTS
Constant Frequency, Standby, 5V and 3.3V LDOs, V_IN to 36V,
28-Lead SSOP
Expandable Up to 12 Phases, No Heat Sinks, V_IN to 36V,
28-Lead SSOP
550kHz, No Sense Resistor, GN24, V_IN to 7V
Burst Mode Operation, 16-Pin Narrow SSOP, Fault Protection,
3.5V ≤ V_IN ≤ 36V
2.5V ≤ V_IN ≤ 9.8V, I_OUT Up to 4A, SOT-23 Package, 550kHz
2.65V ≤ V_IN ≤ 8.5V, I_OUT Up to 4A, 10-Lead MSOP
Current Mode Operation Without Sense Resistor,
Fast Transient Response, 4V ≤ V_IN ≤ 36V
2.5V ≤ V_IN ≤ 9.8V, SOT-23 Package, 550kHz
Up to 42A, No Heat Sink, 3.5V ≤ V_IN ≤ 36V
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT = 0.8V, I_Q = 60µA,
I_SD = <1µA, MS Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT = 0.8V, I_Q = 60µA,
I_SD = <1µA, TSSOP-16E Package
2.65≤ V_IN␣ ≤␣ 9.8V, 550kHz, 10-Lead SSOP
2.5V ≤ V_IN ≤ 9.8V, 550kHz, PGOOD, PLL, 16-Lead SSOP
Constant On-Time Dual Controller, V_IN Up to 36V, Very Low
Duty Cycle Operation, 5mm × 5mm QFN Package
2.75V ≤ V_IN ≤ 9.8V, 0.6V ≤ V_OUT ≤ V_IN, 4mm × 4mm QFN
3737f
LT/TP 0404 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004