LP2997MRX Integrated Circuit Chip DDR-II Termination Regulator integrated circuit ic
integrated circuit ic
,integrated circuit components
LP2997 DDR-II Termination Regulator
General Description
The LP2997 linear regulator is designed to meet the JEDEC SSTL-18 specifications for termination of DDR-II memory. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 500mA continuous current and transient peaks up to 900mA in the application as required for DDR-II SDRAM termination. The LP2997 also incorporates a VSENSE pin to provide superior load regulation and a VREF output as a reference for the chipset and DIMMs.
An additional feature found on the LP2997 is an active low shutdown (SD) pin that provides Suspend To RAM (STR) functionality. When SD is pulled low the VTT output will tri-state providing a high impedance output, but, VREF will remain active. A power savings advantage can be obtained in this mode through lower quiescent current.
Features
• Source and sink current
• Low output voltage offset
• No external resistors required
• Linear topology
• Suspend to Ram (STR) functionality
• Low external component count
• Thermal Shutdown
• Available in SO-8, PSOP-8 packages
Applications
• DDR-II Termination Voltage
• SSTL-18 Termination
Typical Application Circuit
Connection Diagrams
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
PVIN, AVIN, VDDQ to GND
No pin should exceed AVIN −0.3V to +6V
Storage Temp. Range −65˚C to +150˚C
Junction Temperature 150˚C
Lead Temperature (Soldering, 10 sec) 260˚C
SO-8 Thermal Resistance (θJA) 151˚C/W
PSOP-8 Thermal Resistance (θJA) 43˚C/W
Minimum ESD Rating (Note 2) 1kV
Operating Range
Junction Temp. Range (Note 3) 0˚C to +125˚C
AVIN to GND 2.2V to 5.5V
Stock Offer (Hot Sell)
| Part no. | Quantity | Brand | D/C | Package |
| 2N3904 | 5120 | FSC | 14+ | TO-92 |
| IRF7104 | 5120 | IR | 14+ | SOP8 |
| IRFP460 | 5120 | IR | 14+ | TO-247 |
| M57962AL | 5120 | MITSUMI | 16+ | ZIP-12 |
| MAX483CPA | 5120 | MAXIM | 16+ | DIP-8 |
| MCP6002-I/P | 5120 | MICROCHI | 13+ | DIP |
| P6SMB15CA | 5120 | ON | 15+ | SMB |
| TNY267PN | 5120 | POWER | 16+ | DIP-7 |
| TNY278PN | 5120 | POWER | 16+ | DIP-7 |
| MM74C923 | 5122 | FSC | 14+ | SOP |
| LT3467AES6 | 5140 | LT | 14+ | SOT236 |
| IRFP450 | 5166 | IR | 14+ | TO-247 |
| MC33153P | 5187 | ON | 16+ | DIP8 |
| ADM706ARZ | 5200 | AD | 16+ | SOP |
| C9014 | 5200 | KEC | 13+ | TO-92 |
| EV1527 | 5200 | EV | 15+ | SOP8 |
| FSCQ1565RTYDTU | 5200 | FAIRCHILD | 16+ | TO220 |
| KA7824 | 5200 | FSC | 16+ | TO-220 |
| LD1117AL-1.2V-A | 5200 | UTC | 14+ | SOT-223 |
| LM324N | 5200 | TI | 14+ | DIP14 |
| LM741CN | 5200 | NS | 14+ | DIP-8 |
| OPA335AIDBV | 5200 | TI | 16+ | SOT23-5 |
| SN75LBC184DR | 5200 | TI | 16+ | SOP-8 |
| TPC8111 | 5200 | TOSHIBA | 13+ | SOP8 |
| MW4IC2230NB | 5201 | FREESCALE | 15+ | SMD |
| TL494 TI DIP | 5201 | TI | 16+ | DIP |
| TOP222PN | 5212 | POWER | 16+ | DIP8 |
| TPA3113D2PWPR | 5212 | TI | 14+ | TSSOP28 |
| 2SD1410 | 5222 | TOSHIBA | 14+ | TO-220F |
| AM26LV32CD | 5240 | TI | 14+ | SOP16 |
TPS5401DGQR adjustable 0.5A Step Down Regulator SWIFT™ 42V Input Step Down Transformer
TL431BCDBZTG4 NEW AND ORIGINAL STOCK
TLV431ACDBZR NEW AND ORIGINAL STOCK
TLV62565DBVR NEW AND ORIGINAL STOCK
BQ24721CRHBR Electronic IC Chip NEW AND ORIGINAL STOCK
BQ24061DRCR Electronic IC Chip NEW AND ORIGINAL STOCK
DRV8824PWPR Flash Memory IC NEW AND ORIGINAL STOCK
LM2937ES-10 500mA Low Dropout Regulator DDPAK Semiconductor
REF02AU Power Management IC Vref Series 5V Precision Voltage Reference
TPS767D318PWPR 350mV SSOP28 Low Dropout Voltage Regulators
| Image | Part # | Description | |
|---|---|---|---|
|
|
TPS5401DGQR adjustable 0.5A Step Down Regulator SWIFT™ 42V Input Step Down Transformer |
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 500mA 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
|
|
|
|
TL431BCDBZTG4 NEW AND ORIGINAL STOCK |
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA SOT-23-3
|
|
|
|
TLV431ACDBZR NEW AND ORIGINAL STOCK |
Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±1% 15 mA SOT-23-3
|
|
|
|
TLV62565DBVR NEW AND ORIGINAL STOCK |
Buck Switching Regulator IC Positive Adjustable 0.6V 1 Output 1.5A SC-74A, SOT-753
|
|
|
|
BQ24721CRHBR Electronic IC Chip NEW AND ORIGINAL STOCK |
Charger IC Multi-Chemistry 32-VQFN (5x5)
|
|
|
|
BQ24061DRCR Electronic IC Chip NEW AND ORIGINAL STOCK |
Charger IC Lithium Ion/Polymer 10-VSON (3x3)
|
|
|
|
DRV8824PWPR Flash Memory IC NEW AND ORIGINAL STOCK |
Bipolar Motor Driver Power MOSFET Logic 28-HTSSOP
|
|
|
|
LM2937ES-10 500mA Low Dropout Regulator DDPAK Semiconductor |
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA DDPAK/TO-263-3
|
|
|
|
REF02AU Power Management IC Vref Series 5V Precision Voltage Reference |
Series Voltage Reference IC Fixed 5V V ±0.3% 21 mA 8-SOIC
|
|
|
|
TPS767D318PWPR 350mV SSOP28 Low Dropout Voltage Regulators |
Linear Voltage Regulator IC Positive Fixed 2 Output 1A 28-HTSSOP
|