Basic Product Information
Part Number: TPS51200DRC
Core Electrical Parameters
| Parameter |
Value |
Unit |
| VDDQ Input Voltage (VLDOIN) |
1.1 to 2.3 |
V |
| VLDOIN Supply Voltage |
2.375 to 3.5 |
V |
| Output Voltage (VTT) |
0.5 x VDDQ (tracking) |
V |
| VTT Output Accuracy |
±10 |
mV |
| Continuous Output Current (sink + source) |
±1.5 |
A |
| Peak Output Current (sink + source) |
±2.5 |
A |
| VLDOIN Quiescent Current (typ) |
430 |
μA |
| Shutdown Current (typ) |
2 |
μA |
| Droop Compensation |
Yes (adjustable via external resistor) |
– |
| Power Good Output |
Yes |
– |
| Soft-Start |
Internal (1.5ms typ) |
– |
| Current Limit |
Yes (foldback) |
– |
| Thermal Shutdown |
Yes |
– |
| VREF (Reference Output) |
Yes (VDDQ/2 buffered) |
– |
| Operating Temperature |
-40 to +85 |
°C |
Core Features & Advantages
The TPS51200DRC delivers a dedicated DDR/DDR2/DDR3 VTT termination regulator capable of sourcing and sinking ±1.5A continuous current while tracking VDDQ/2 with ±10mV accuracy.
- Primary Function: DDR memory termination voltage (VTT) regulator that tracks VDDQ/2 and provides bidirectional (sink/source) current for DDR/DDR2/DDR3/DDR3L termination bus.
- Advantages:
- Bidirectional ±1.5A continuous / ±2.5A peak — single-chip solution replaces separate source LDO + sink LDO, halving BOM and PCB area for VTT regulation.
- VDDQ/2 tracking with ±10mV accuracy — tight VTT centering minimizes DDR timing margin degradation and improves memory interface signal integrity.
- Adjustable droop compensation — external resistor programs output impedance to match PCB trace impedance, improving DDR signal integrity under transient load steps.
Typical Application Scenarios
- Industry: Computing / Server / Consumer / Networking
- Equipment: DDR3/DDR3L memory modules, servers, laptops, embedded computing platforms
- Use Cases:
- DDR3 VTT termination rail generation (VDDQ=1.5V → VTT=0.75V) with ±1.5A source/sink for server memory DIMM arrays.
- DDR3L low-power memory VTT (VDDQ=1.35V → VTT=0.675V) in laptops and embedded computing platforms.
- DDR2 VTT bus termination (VDDQ=1.8V → VTT=0.9V) with integrated VREF output for reference distribution.
Market Reference Price
| Market |
Price Range |
Currency |
| Huaqiangbei Spot |
$0.80 – $1.50 |
USD |
| Overseas B2B |
$1.20 – $2.80 |
USD |
Related Models Comparison
| Model |
Difference |
Application |
| TPS51200ADRC |
Wider VLDOIN range (1.1V–2.3V VDDQ support for DDR4), enhanced accuracy |
DDR4 memory VTT termination requiring lower VDDQ tracking |
| TPS51116 |
4A VTT LDO + integrated VDDQ switch, higher current in QFN-20 |
High-density server memory requiring >1.5A VTT and VDDQ switching |
| RT9199-18GB |
Fixed 0.9V VTT LDO (DDR2 only), lower cost, simpler but no tracking |
Cost-sensitive DDR2-only designs with fixed VTT requirement |
