نظرة عامة على المنتج
LP2998MAX/NOPB from TI is a DDR termination regulator generating VTT = VDDQ/2 with 1A source/sink capability. +/-20mV accuracy. Supports DDR/DDR2/DDR3. Power-save mode for standby.
مبدأ العمل
Senses VDDQ via external resistor divider and generates VTT = VDDQ/2. Built-in error amplifier drives output stage to maintain VTT. Can source and sink current to terminate DDR bus. Power-save mode reduces quiescent current when VTT not needed.
Pin Description
| دبوس | الاسم | الوظيفة |
|---|---|---|
| 1 | VIN | Input 2.2-5.5V |
| 2 | VDDQ | Sense input |
| 5 | VTT | Termination output |
| 7 | SAVE | Power save control |
التطبيقات
- DDR memory VTT supply
- DDR2/DDR3 bus termination
Alternative Models
| الشركة المصنعة | رقم الجزء | الملاحظات |
|---|---|---|
| TI | TPS51200DRCR | Similar DDR term reg |