LTC3736_15 Datasheet, PDF (28/28 Pages) Linear Technology – Dual 2-Phase, No RSENSE, Synchronous Controller with Output Tracking

LTC3736
TYPICAL APPLICATIO
2-Phase, Single Output Synchronous DC/DC Converter (3.3V_IN to 1.8V_OUT at 8A)
V_IN
3.3V
C_IN
10µF
×2
R_FB1A
59k
R_FB1B
118k
C_ITH1A
100pF
C_ITH1
R_ITH1
15k
220pF
R_VIN 10Ω
C_VIN
1µF
C_SS C_ITH2B
4.7nF 22pF
22
23
24
1
2
SW1
IPRG1
V_FB1
I_TH1
IPRG2
SENSE1⁺
PGND
BG1
SYNC/FCB
TG1
21
20
19
18
17
3
4
PLLLPF
SGND
PGND ¹⁶
TG2 ¹⁵
5
LTC3736EUF
V_IN
RUN/SS
14
1M
13
9
7
8
6
PGOOD
V_FB2
I_TH2
TRACK
BG2
PGND
SENSE2⁺
SW2
12
11
10
PGND
25
L1
MP1
1.5µH
V_OUT
1.8V
8A
MN1
Si7540DP
+
C_OUT1
150µF
MP2
MN2
Si7540DP
L2
1.5µH
C_OUT2
150µF
3736 TA02
C_OUT1, C_OUT2: SANYO 4TPB150MC
L1, L2: VISHAY IHLP-2525CZ-01
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PART NUMBER
LTC1622
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DESCRIPTION
Synchronizable Low Input Voltage Current Mode
Step-Down DC/DC Controller
High Efficiency Synchronous Step-Down Controller
LTC1772
LTC1773
LTC1778
Constant Frequency Current Mode Step-Down
DC/DC Controller
Synchronous Step-Down Controller
No R_SENSE^TM Synchronous Step-Down Controller
LTC1872
LTC2923
LTC3411
Constant Frequency Current Mode Step-Up Controller
Power Supply Tracking Controller
1.25A (I_OUT), 4MHz, Synchronous Step-Down DC/DC Converter
LTC3416
LTC3701
LTC3708
LTC3728/LTC3728L
LTC3736-1
LTC3737
LTC3776
4A (I_OUT), 4MHz, Synchronous Step-Down DC/DC Converter
with Output Tracking
2-Phase, Low Input Voltage Dual Step-Down DC/DC Controller
Fast 2-Phase, No R_SENSE Buck Controller with
Output Tracking
Dual, 550kHz, 2-Phase Synchronous Step-Down
Switching Regulator
Dual, 2-Phase, No R_SENSE Synchronous Controller with
Spread Spectrum
Dual, 2-Phase, No R_SENSE Controller with
Output Tracking
Dual, 2-Phase, No R_SENSE Synchronous Controller for DDR/QDR
Memory Termination
LTC3808
No R_SENSE, Low EMI, Synchronous Step-Down Controller with
Output Tracking
No R_SENSE is a trademark of Linear Technology Corporation.
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
V_IN 2V to 10V, Burst Mode Operation, 8-Lead MSOP
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
Controls Up to Three Supplies, 10-Lead MSOP
95% Efficiency, V_IN: 2.5V to 5.5V, I_Q = 60µA, I_SD = <1µA,
MS Package
95% Efficiency, V_IN: 2.25V to 5.5V, I_SD = <1µA,
TSSOP-20E Package
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
Constant Frequency, V_IN to 36V, 5V and 3.3V LDOs,
5mm × 5mm QFN or 28-Lead SSOP
V_IN: 2.75V to 9.8V, I_OUT Up to 5A, 4mm × 4mm QFN Package
Spread Spectrum Operation; Output Tracking
Non-Synchronous Constant Frequency With PLL, 4mm × 4mm
QFN and 24-Lead SSOP Packages
Provides V_DDQ and V_TT With One IC; 2.75V ≤ V_IN ≤ 9.8V;
Adjustable Constant Frequency With PLL Up to 850kHz; Spread
Spectrum Operation; 4mm × 4mm QFN and 24-Lead SSOP
Packages
2.75V ≤ V_IN ≤ 9.8V; Spread Spectrum Operation; 3mm × 4mm
DFN and 16-Lead SSOP Packages
3736fa
LT/TP 0305 500 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004