DDR Memory/Bus Termination
Analog Device’s SRAM memory supplies and bus termination products are the ideal choice for DDR, QDR memory, SSTL logic, and HSTL interface for high-speed FPGAs and processors as well as other advanced portable microprocessor-based systems. Our growing portfolio of products offer voltage-mode and current-mode switching regulator topologies, very low input voltages, adjustable switching frequency operation and ultra-thin packaging.
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Design Notes
- DN551 - Ultrathin Triple Output μModule Regulator for DDR, QDR and QDR-IV SRAM Fits 0.5cm2 Area and Backside of PCB PDF
- DN309 - 3A, 2MHz Monolithic Synchronous Step-Down Regulator Provides a Compact Solution for DDR Memory Termination PDF
- DN281 - Wide Input Range, High Efficiency DDR Termination Power Supply Achieves Fast Transient Response PDF
- DN503 - Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing and ±50mA VTT Reference PDF
- Design Solutions 43 - High Performance Switch Mode Power Solutions for Altera Low Voltage FPGAs PDF
DDR Memory/Bus Termination
| SortOrder | Part# | Number of Outputs | Vin (min) (V) | Vin (max) (V) | DDR Output Current (A) | Monolithic | Frequency (typ) (Hz) | Comments | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTM4632 | 3 | 3.1 | 15 | ±3A (x2), VTTR | Yes | 1M | Ultrathin, Triple Output, Step-Down µModule Regulator for DDR-QDR4 Memory | $7.35 (LTM4632EV#PBF) |
| 2 | LTC3676 | 7 | 2.7 | 5.5 | ±1.5A, VTTR | Yes | 2.25M | LTC3676-1 has ±1.5A DDR, VTTR ref | $5.50 (LTC3676EUJ#PBF) |
| 3 | LTC3634 | 3 | 3.6 | 15 | ±3A (x2), VTTR | Yes | 4M | 15V Dual 3A Monolithic Step-Down Regulator for DDR Power | $4.25 (LTC3634EUFD#PBF) |
| 4 | LTC3618 | 3 | 2.25 | 5.5 | ±3A (x2), VTTR | Yes | 4M | Dual 4MHz, +/-3A Synchronous Buck for DDR | $4.10 (LTC3618EUF#PBF) |
| 5 | LTC3617 | 2 | 2.25 | 5.5 | ±6A, VTTR | Yes | 4M | ±6A Monolithic Synchronous Step-Down for DDR | $3.80 (LTC3617EUDD#PBF) |
| 6 | LTC3876 | 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) |
| 7 | LTC3615 | 2 | 2.25 | 5.5 | ±1.5A (x2) | Yes | 4M | Selectable 0°/90°/180° (LTC3615) or 140°/180° (LTC3615-1) | $3.95 (LTC3615EUF#PBF) |
| 8 | LTC3614 | 1 | 2.25 | 5.5 | ±3A | Yes | 4M | 4A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter | $3.45 (LTC3614EUDD#PBF) |
| 9 | LTC3616 | 1 | 2.25 | 5.5 | ±3A | Yes | 4M | 6A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter | $3.80 (LTC3616EUDD#PBF) |
| 10 | LTC3612 | 1 | 2.25 | 5.5 | ±1.5A | Yes | 4M | 3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter | $3.10 (LTC3612EUDC#PBF) |
| 11 | LTC3831-1 | 1 | 3 | 8 | 20A | No | 500k | Synchronous Switching Regulator Controller for DDR, LTC3831-1 Vref 0.75V | $2.90 (LTC3831EGN-1#PBF) |
| 12 | LTC3776 | 2 | 2.75 | 9.8 | 4A, ±4A | No | 750k | Generates VDDQ and VTT; VTT sinks/sources current. Optional spread spectrum | $3.75 (LTC3776EGN#PBF) |
| 13 | LTC3717-1 | 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) |
| 14 | LTC3718 | 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) |
| 15 | LTC3413 | 1 | 2.5 | 5.5 | 3A | Yes | 2M | 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination | $3.95 (LTC3413EFE#PBF) |
| 16 | LTC3831 | 1 | 3 | 8 | 20A | No | 500k | Synchronous Switching Regulator Controller for DDR, LTC3831 Vref 1.25V | $2.90 (LTC3831EGN#PBF) |
| 17 | LTC3717 | 1 | 4 | 36 | 20A | No | 1.5M | No RSENSE Step-Down Controller for DDR, Vout = 1/2Vin | $2.95 (LTC3717EGN#PBF) |
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