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參數(shù)資料
| 型號(hào)： | LTC3634IUFD#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5.5 A DUAL SWITCHING CONTROLLER, 4600 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封裝： | 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-28 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大小： | 359K |
| 代理商： | LTC3634IUFD#PBF |
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LTC3634
1
3634f
Typical applicaTion
FeaTures
DescripTion
15V Dual 3A Monolithic
Step-Down Regulator
for DDR Power
TheLTC3634isahighefficiency,dual-channelmonolithic
synchronous step-down regulator which provides power
supply and bus termination rails for DDR1, DDR2, and
DDR3 SDRAM controllers. The operating input voltage
range is 3.6V to 15V, making it suitable for point-of-load
power supply applications from a 5V or 12V input, as well
as various battery powered systems.
The VTT regulated output voltage is equal to VDDQIN0.5.
An on-chip buffer capable of driving a 10mA load pro-
vides a low noise reference output (VTTR) also equal to
VDDQIN0.5.
The operating frequency is programmable and synchro-
nizable from 500kHz to 4MHz with an external resistor.
The two channels can operate 180° out-of-phase, which
relaxes the requirements for input and output capacitance.
The unique controlled on-time architecture is ideal for
powering DDR applications from a 12V supply at high
switchingfrequencies,allowingtheuseofsmallerexternal
components.
The LTC3634 is offered in both 28-pin 4mm × 5mm QFN
and 28-pin exposed pad TSSOP packages.
Efficiency and Power Loss
vs Load Current
applicaTions
n
3.6V to 15V Input Voltage Range
n
±3A Output Current per Channel
n
Up to 95% Efficiency
n
Selectable 90°/180° Phase Shift Between Channels
n
Adjustable Switching Frequency: 500kHz to 4MHz
n
VTTR = VDDQ/2 = VTT Reference
n
±1.6% Accurate VTTR at 0.75V
n
Optimal VOUT Range: 0.6V to 3V
n
±10mA Buffered Output Supplies VREF Reference
Voltage
n
Current Mode Operation for Excellent Line and Load
Transient Response
n
External Clock Synchronization
n
Short-Circuit Protected
n
Input Overvoltage and Overtemperature Protection
n
Power Good Status Outputs
n
Available in (4mm × 5mm) QFN-28 and Thermally
Enhanced 28-Lead TSSOP Packages
n
DDR Memory Power Supplies
RUN1
RUN2
INTVCC
PHMODE
MODE/SYNC
RT
ITH1
ITH2
LTC3634
3634 TA01a
1.5H
24.3k
12.1k
0.1F
0.01F
VREF
0.9V
0.1F
PGND
SGND
BOOST1
SW1
VON1
VDDQIN
VFB1
BOOST2
SW2
VFB2
VON2
VTTR
VIN1
VIN
3.6V TO 15V
VIN2
0.82H
18k
100F
×2
VDDQ
1.8V/3A
100F
×4
VTT
0.9V/±3A
910pF
26.4k
324k
560pF
2.2F
47F
×2
L
, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and PolyPhase are registered
trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks
are the property of their respective owners. Protected by U.S. Patents including 5481178,
5847554, 6580258, 6476589, 6774611.
LOAD CURRENT (A)
0
70
80
100
1.5
2.5
3634 TA01b
30
20
0.5
1
2
3
10
60
50
40
0
90
1.4
1.6
2.0
0.6
0.4
0.2
1.2
1.0
0.8
0
1.8
EFFICIENCY
(%)
POWER
LOSS
(W)
VIN = 12V
VDDQ
VTT (SINKING CURRENT)
VTT (SOURCING CURRENT)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3634MPFE#PBF | 制造商:Linear Technology 功能描述:IC CONV DDR DDR2 DDR3 28TSSOP 制造商:Linear Technology 功能描述:BUCK 15V 3A 500KHZ-4MHZ TS 制造商:Linear Technology 功能描述:BUCK, 15V, 3A, 500KHZ-4MHZ, TSSOP-28 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, 15V Dual 3A Monolithic Step Down Regulator for DDR Power |
| LTC3634MPFE#TRPBF | 制造商:Linear Technology 功能描述:IC REG 15V 3A STEP DOWN 28-TSSOP 制造商:Linear Technology 功能描述:DC-DC REGULATOR, BUCK, ADJ, TSSOP-28, Primary Input Voltage:15V, No. of Outputs:2, Output Current:3A, No. of Pins:28, Operating Temperature Min:-55C, Operating Temperature Max:150C, MSL:-, Package / Case:28-TSSOP , RoHS Compliant: Yes |
| LTC3634MPUFD#PBF | 制造商:Linear Technology 功能描述:IC CONV DDR DDR2 DDR3 28-QFN 制造商:Linear Technology 功能描述:BUCK 15V 3A 500KHZ-4MHZ QF |
| LTC3637EDHC#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 1A 16DFN |
| LTC3637EMSE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 1A 16MSOP |
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