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| | | Double Data Rate (DDR) Memory Supply and Termination | | |
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| | | DDR Memory Supply (VDD/VDDQ) Regulaton | | |
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| | | | | | | | | | | | | | | | Vin Range (PV|N) | Iout(A) | | FSW | | TempRange(°C) | Other Features/Comments | | | | | 2.2 to 16 | 0.5 to 20 cont. | 0.6 | 50 kHz to 2 MHz | 4.5 to 5.5 | -40 to 125 | Suspend to disk shutdown; UVP and OVP latch-off | TSSOP-14 | | | | 2.2 to 16 | 0.5 to 20 cont. | 0.6 | 50 kHz to 2 MHz | 4.5 to 5.5 | -40 to 125 | Suspend to disk shutdown | TSSOP-14 | | | | 1 to 14 | 0.5 to 20 cont. | 0.6 | 50 kHz to 1 MHz | 3.0 to 6.0 | -40 to 125 | Monotonic start-up, synchronization | TSSOP-14 | | | | 5.5 to 28 | 0.5 to 20 cont. | 0.6 | 200 kHz to 500 kHz | 4.5 to 5.5 | -5 to 125 | Pulse-skip mode for high light load efficiency | TSSOP-20 | | | | 4.5 to 75 | 0.5 to 20 cont. | 0.75 | 50 kHz to 1 MHz | 4.5 to 30.0 | -40 to 125 | SSPR, synchronization | TSSOP-14 | | | | | | | | | | | | | | | |
| | | LM2727 LM2737 LM2745/47 LM27241 LM5115 | | |
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| | | Note: All products support shutdown, lossless current sense, and power-good flag. | | |
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| | | DDR Memory Termination (VTT) and Reference (VREF) Regulators | | |
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| | | | | | | | | | Temp | | | | | Range (°C) | Other Features/ Comments | | | | | | | | | |
| | | | | | | | | | Product ID | Rang. (PVIN | | | | Linear | | | | LP2994 | 1.5 to 5.5 | | | | LP2995 | 2.2 to 5.5 | | | | LP2996 | 1.5 to 5.5 | | | | LP2997 | 1.5 to 5.5 | | | | Switching | | | | | | | | | |
| | | Split Shut-Rails* I down | | Thermal Protection | | |
| | | VREF Out | | |
| | | Pad | | |
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| | | 3 peak, 1.5 cont. 3 peak, 1.5 cont. 3 peak, 1.5 cont. | | DDR and DDR-II DDR DDR and DDR-II DDR-II | | Suspend to RAM shutdown | | SOIC-8 SOIC-8, LLP-16, PSOP-8 SOIC-8, LLP-16, PSOP-8 SOIC-8, PSOP-8 | | |
| | | 0 to 125 0 to 125 | | |
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| | | ✓ 0 to 125 ✓ 0 to 125 | | Suspend to RAM shutdown Suspend to RAM shutdown | | |
| | | 3 | | |
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| | | 1.5 peak, 0.5 cont. | | |
| | | 3 | | |
| | | ✓ | | |
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| | | | | | | | | | | | | | | | | | | | LM2744 | 1 to 16 | 0.5 to 25 cont. | DDR and DDR-II | 50 kHz | 4 | ✓ | ✓ | — | — | -40 to | Suspend | | | | | | | | to 1 MHz | | | | | | 125 | to RAM | | | | | | | | | | | | | | | shutdown, low | | | | | | | | | | | | | | | 4 mV offset | | | | | | | | | | | | | | | | | | | |
| | | TSSOP-14 | | |
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| | | independent power and analog rails | | |
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| | | 43 | | |
| | | power.national.com | | |
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