LTC3776EUF View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3776EUF
Linear Technology
'LTC3776EUF' PDF : 28 Pages View PDF
LTC3776
TYPICAL APPLICATIO
2-Phase, Spread Spectrum, DDR Memory Supplies with Ceramic Output Capacitors
VIN
3.3V
CIN
22µF
RFB1A RFB1B
59k 187k
CITH1A
100pF
CITH1
1000pF
RITH1
22k
2200pF
RVIN 10Ω
CITH2
CVIN 2.2nF
1µF
RITH2
6.2k
CSS
10nF
CITH2A
330pF
22
SW1
SENSE1+ 21
23
24
1
2
IPRG1
PGND
VFB1
BG1
ITH1 SYNC/SSEN
IPRG2
TG1
20
19
18
17
3
4
PLLLPF
SGND
PGND 16
TG2 15
5
LTC3776EUF
VIN
RUN/SS
14
13
9
7
8
6
PGOOD
VFB2
ITH2
VREF
BG2
PGND
SENSE2+
SW2
12
11
10
PGND
25
MP1
FDC638P
MP2
FDC638P
L1
2.2µH
MN1
FDC637N
MN2
FDC637N
L2
2.2µH
VDDQ
2.5V
2A
COUT1
47µF
COUT2
47µF
VTT
1.25V
±2A
L1, L2: VISHAY IHLP-2525CZ-01
3776 TA02
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High Efficiency Synchronous Step-Down Controller
Constant Frequency Current Mode Step-Down
DC/DC Controller
No RSENSETM Synchronous Step-Down Controller
Power Supply Tracking Controller
1.25A (IOUT), 4MHz, Synchronous Step-Down DC/DC Converter
2.5A (IOUT), 4MHz, Synchronous Step-Down DC/DC Converter
3A Monolithic DDR Memory Termination Regulator
2-Phase, Low Input Voltage Dual Step-Down DC/DC Controller
Fast 2-Phase, No RSENSE Buck Controller with
Output Tracking
High Power DDR Memory Termination Regulator
Dual, 550kHz, 2-Phase Synchronous Step-Down
Switching Regulator
Dual, 2-Phase, No RSENSE, Synchronous Controller
with Output Tracking
Burst Mode Operation, 16-Pin Narrow SSOP, Fault Protection,
3.5V ≤ VIN ≤ 36V
2.5V ≤ VIN ≤ 9.8V, IOUT Up to 4A, SOT-23 Package, 550kHz
Current Mode Operation Without Sense Resistor,
Fast Transient Response, 4V ≤ VIN ≤ 36V
Controls Up to Three Supplies, 10-Lead MSOP
95% Efficiency, VIN: 2.5V to 5.5V, VOUT = 0.8V, IQ = 60µA,
ISD = <1µA, MS Package
95% Efficiency, VIN: 2.5V to 5.5V, VOUT = 0.8V, IQ = 60µA,
ISD = <1µA, TSSOP-16E Package
±3A Output Current, 2.25V ≤ VIN ≤ 5.5V
2.5V ≤ VIN ≤ 9.8V, 550kHz, PGOOD, PLL, 16-Lead SSOP
Constant On-Time Dual Controller, VIN Up to 36V, Very Low
Duty Cycle Operation, 5mm × 5mm QFN Package
4V ≤ VIN ≤ 36V, VOUT Tracks VIN or VREF, IOUT from 1A to 20A
Constant Frequency, VIN to 36V, 5V and 3.3V LDOs,
5mm × 5mm QFN or 28-Lead SSOP
VIN: 2.75 to 9.8V, IOUT up to 5A, 4mm x 4mm QFN Package
LTC3736-1
Dual, 2-Phase, No RSENSE, Synchronous Controller
with Spread Spectrum
VIN: 2.75 to 9.8V, Spread Spectrum Operation, Output Voltage
Tracking, 4mm x 4mm QFN Package
LTC3737
Dual, 2-Phase, No RSENSE, Controller
with Output Tracking
LTC3831
High Power DDR Memory Termination Regulator
No RSENSE is a trademark of Linear Technology Corporation.
VIN: 2.75 to 9.8V, IOUT up to 5A, 4mm x 4mm QFN Package
VOUT Tracks 1/2 VIN or VREF, 3V ≤ VIN ≤ 8V, IOUT from 1A to 20A
3776f
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LT/TP 0205 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005
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