DDR/QDR 存储器总线终端

ADI公司的SRAM存储器电源和总线端接产品非常适合用于高速FPGA和处理器的DDR、QDR存储器、SSTL逻辑和HSTL接口以及其他基于微处理器的高级便携式系统,这些系统支持高带宽应用,如PCIe、基于云的系统、RAID、视频处理和网络。DDR和QDR存储器需要三个电压轨:总线电源电压(VDD)、总线端接电压(VTT)和基准电压(VREF)。总线端接电压(VTT)和基准电压(VREF)必须跟踪至½总线电源电压(VDD),总线端接电压(VTT)还需要吸电流和源电流功能。我们的DDR/QDR存储器总线端接产品组合支持i.MX、PXA、ARM、OMAP和其他高级微处理器的供电需求,提供电压模式和电流模式开关稳压器拓扑、极低输入电压、可调开关频率工作模式和超薄封装。
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DDR 存储器 / 总线端接

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SortOrderPart#Number of OutputsVin
(min)
(V)
Vin
(max)
(V)
DDR Output Current
(A)
MonolithicFrequency
(typ)
(Hz)
CommentsPrice (1000+)
($ US)
1LTM4632 3 3.1 15 ±3A (x2), VTTR Yes 1M Ultrathin, Triple Output, Step-Down µModule Regulator for DDR-QDR4 Memory $7.35 (LTM4632EV#PBF)
2LTC3676Reference Circuit Available 7 2.7 5.5 ±1.5A, VTTR Yes 2.25M LTC3676-1 has ±1.5A DDR, VTTR ref $5.50 (LTC3676EUJ#PBF)
3LTC3634Reference Circuit Available 3 3.6 15 ±3A (x2), VTTR Yes 4M 15V Dual 3A Monolithic Step-Down Regulator for DDR Power $4.25 (LTC3634EUFD#PBF)
4LTC3618Reference Circuit Available 3 2.25 5.5 ±3A (x2), VTTR Yes 4M Dual 4MHz, +/-3A Synchronous Buck for DDR $4.10 (LTC3618EUF#PBF)
5LTC3617 2 2.25 5.5 ±6A, VTTR Yes 4M ±6A Monolithic Synchronous Step-Down for DDR $3.80 (LTC3617EUDD#PBF)
6LTC3876 3 4.5 38 20A, ±20A, VTTR No 2M Dual DC/DC Controller for DDR, Differential VDDQ Sense & +/-50mA VTT Reference $2.94 (LTC3876EUHF#PBF)
7LTC3615Reference Circuit Available 2 2.25 5.5 ±1.5A (x2) Yes 4M Selectable 0°/90°/180° (LTC3615) or 140°/180° (LTC3615-1) $3.95 (LTC3615EUF#PBF)
8LTC3614Reference Circuit Available 1 2.25 5.5 ±3A Yes 4M 4A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter $3.45 (LTC3614EUDD#PBF)
9LTC3616Reference Circuit Available 1 2.25 5.5 ±3A Yes 4M 6A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter $3.80 (LTC3616EUDD#PBF)
10LTC3612Reference Circuit Available 1 2.25 5.5 ±1.5A Yes 4M 3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter $3.10 (LTC3612EUDC#PBF)
11LTC3831-1 1 3 8 20A No 500k Synchronous Switching Regulator Controller for DDR, LTC3831-1 Vref 0.75V $2.90 (LTC3831EGN-1#PBF)
12LTC3776 2 2.75 9.8 4A, ±4A No 750k Generates VDDQ and VTT; VTT sinks/sources current. Optional spread spectrum $3.75 (LTC3776EGN#PBF)
13LTC3717-1 1 4 36 20A No 1.5M No RSENSE Step-Down Controller for DDR, Vout = 1/2Vref, LTC3717-1 Has Von Pin $3.15 (LTC3717EUH-1#PBF)
14LTC3718 1 1.5 36 20A No 1.5M Very low input voltage. provides its own 5V N-CH MOSFET gate drive $3.45 (LTC3718EG#PBF)
15LTC3413Reference Circuit Available 1 2.5 5.5 3A Yes 2M 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination $3.95 (LTC3413EFE#PBF)
16LTC3831 1 3 8 20A No 500k Synchronous Switching Regulator Controller for DDR, LTC3831 Vref 1.25V $2.90 (LTC3831EGN#PBF)
17LTC3717 1 4 36 20A No 1.5M No RSENSE Step-Down Controller for DDR, Vout = 1/2Vin $2.95 (LTC3717EGN#PBF)