参数资料
| 型号： | LTC3634EUFD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC CONV DDR DDR2 DDR3 28QFN |
| 标准包装： | 73 |
| 应用： | 转换器，DDR，DDR2，DDR3 |
| 输入电压： | 1.4 V ~ 15 V |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 3 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN（4x5） |
| 包装： | 管件 |
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LTC3634
3.6V to 15V Input Voltage Range
±3A Output Current per Channel
Up to 95% Efficiency
Selectable 90°/180° Phase Shift Between Channels
Adjustable Switching Frequency: 500kHz to 4MHz
VTTR = V DDQ /2 = V TT Reference
±1.6% Accurate VTTR at 0.75V
Optimal V OUT Range: 0.6V to 3V
±10mA Buffered Output Supplies V REF Reference
Current Mode Operation for Excellent Line and Load
External Clock Synchronization
Short-Circuit Protected
Input Overvoltage and Overtemperature Protection
Power Good Status Outputs
Available in (4mm × 5mm) QFN-28 and Thermally
DDR Memory Power Supplies
FEATURES
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Voltage
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Transient Response
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Enhanced 28-Lead TSSOP Packages
APPLICATIONS
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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.
TYPICAL APPLICATION
15V Dual 3A Monolithic
Step-Down Regulator
for DDR Power
DESCRIPTION
The LTC ? 3634 is a high efficiency, dual-channel monolithic
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 V TT regulated output voltage is equal to VDDQIN ? 0.5.
An on-chip buffer capable of driving a 10mA load pro-
vides a low noise reference output (VTTR) also equal to
VDDQIN ? 0.5.
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
switching frequencies, allowing the use of smaller external
components.
The LTC3634 is offered in both 28-pin 4mm × 5mm QFN
and 28-pin exposed pad TSSOP packages.
V IN
3.6V TO 15V
324k
47μF
× 2
2.2μF
26.4k
560pF
18k
910pF
V IN2 V IN1
RUN1
RUN2
INTV CC LTC3634
PHMODE
MODE/SYNC
RT
ITH1
ITH2
SGND PGND
BOOST1
SW1
V ON1
VDDQIN
V FB1
BOOST2
SW2
V FB2
V ON2
VTTR
3634 TA01a
0.1μF 1.5μH
24.3k
12.1k
0.1μF 0.82μH
V REF
0.9V
0.01μF
V DDQ
1.8V/3A
100μF
× 2
V TT
0.9V/±3A
100μF
× 4
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency and Power Loss
vs Load Current
V IN = 12V
V DDQ
V TT (SINKING CURRENT)
V TT (SOURCING CURRENT)
0.5 1 1.5 2 2.5 3
LOAD CURRENT (A)
3634 TA01b
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3634fb
For more information www.linear.com/LTC3634
1
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相关代理商/技术参数 |
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| LTC3634HFE#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:DP-SWREG/Monolithic, 15V Dual 3A Monolithic Step Down Regulator for DDR Power 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:-40C, Operating Temperature Max:150C, MSL:MSL 1 - Unlimited, Package / Case:28-TSSOP , RoHS Compliant: Yes |
| LTC3634HFE#TRPBF | 制造商:Linear Technology 功能描述:IC REG 15V 3A STEP DOWN 28-TSSOP |
| LTC3634HUFD#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 制造商:Linear Technology 功能描述:DC-DC REGULATOR, BUCK, ADJ, QFN-28, Primary Input Voltage:15V, No. of Outputs:2, Output Current:3A, No. of Pins:28, Operating Temperature Min:-40C, Operating Temperature Max:150C, MSL:MSL 1 - Unlimited, Package / Case:28-QFN , RoHS Compliant: Yes |
| LTC3634HUFD#TRPBF | 制造商:Linear Technology 功能描述:IC REG 15V 3A STEP DOWN 28-QFN 制造商:Linear Technology 功能描述:DC-DC REGULATOR, BUCK, ADJ, QFN-28, Primary Input Voltage:15V, No. of Outputs:2, Output Current:3A, No. of Pins:28, Operating Temperature Min:-40C, Operating Temperature Max:150C, MSL:-, Package / Case:28-QFN , RoHS Compliant: Yes |
| LTC3634IFE#PBF | 功能描述:IC CONV DDR DDR2 DDR3 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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