TPS51200QDRCRQ1 - 3A DDR Termination Regulator | TI | Automotive AEC-Q100
MPN: TPS51200QDRCRQ1 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.15 | $1.15 |
| 10 | $1.03 | $10.30 |
| 100 | $0.83 | $83.00 |
| 500 | $0.68 | $340.00 |
| 1,000 | $0.53 | $530.00 |
TPS51200QDRCRQ1 Overview
A DDR termination regulator (VTT regulator) is a specialized linear regulator that powers the termination rail of DDR memory buses. Unlike a standard LDO, it must both source and sink current to hold the termination voltage at VDDQ/2 during bus transitions, which is essential for signal integrity on DDR2, DDR3, DDR3L, and DDR4 interfaces. It sits within the memory power-management hierarchy alongside switching regulators and reference generators.
Key features include a 2.5V to 6.5V input range, VTT output tracking of VTTREF within +/-25 mV for both DC and AC conditions, continuous sink/source current of +/-2 A with 3 A peak capability, remote sensing to compensate PCB trace drops, and an integrated VLDO output for VTTREF generation. AEC-Q100 qualification covers -40C to +105C operation for automotive environments.
Architecturally, the TPS51200-Q1 uses a high-bandwidth sink/source amplifier with a precision reference, giving excellent load and line regulation with minimal external components. The enable pin supports power sequencing (S3/S5 support), and the soft-start limits inrush current at startup.
Typical applications include DDR memory termination in automotive infotainment, ADAS domains, telematics ECUs, and industrial/networking equipment using DDR memory.
Design tip: place input and output ceramic capacitors close to the pins, connect the exposed pad to a generous copper area for thermal dissipation, and drive the EN pin from a sequenced logic rail for multi-rail systems. Pricing data as of 2026-08-29.
Drop-in alternatives for TPS51200QDRCRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS51200QDRCRQ1 (same form factor and footprint) — differing in Input Voltage Range, Minimum Output Capacitance, Package, VTTREF Output.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS51200DRCR
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NCP51200MNTXG
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APW7120
⚡ Same Package ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS51200QDRCRQ1 Maximum Ratings & Electrical Characteristics
| Function | Sink/Source DDR Termination Regulator (VTT) |
| Input Voltage Range | 2.5 V to 6.5 V |
| VTT Output Tracking | VTTREF -25 mV < VTT < VTTREF +25 mV |
| Continuous Output Current | -2 A to +2 A (sink/source) |
| Peak Output Current | 3 A |
| Minimum Output Capacitance | 20 uF |
| Operating Temperature | -40C to +105C (AEC-Q100 Grade 1) |
| Automotive Qualification | AEC-Q100 |
| Remote Sensing | Yes |
| VTTREF Output | Yes (integrated VLDO) |
| Enable Pin | Yes (S3/S5 support) |
| Package | VSON-10 (3x3 mm) with exposed pad |
| Mounting Type | Surface Mount |
| DDR Support | DDR2, DDR3, DDR3L, DDR4 |
| RoHS Status | Compliant |
TPS51200QDRCRQ1 Pin Configuration
| Pin 1 | VDD — Input supply, 2.5 V to 6.5 V |
| Pin 2 | VTT — Termination regulator output (sink/source) |
| Pin 3 | PGND — Power ground for VTT output stage |
| Pin 4 | VOSNS — VTT remote sense input |
| Pin 5 | GND — Analog/signal ground |
| Pin 6 | EN — Enable input for power sequencing (S3/S5) |
| Pin 7 | VLDOIN — Supply input for VLDO (VTTREF) regulator |
| Pin 8 | VTTREF — Reference voltage output (VDDQ/2) |
| Pin 9 | VTTSNS — VTTREF sense input |
| Pin 10 | AGND — Analog ground reference |
| Pin 11 | PAD — Exposed thermal pad - connect to GND copper pour |
Typical Applications
TPS51200QDRCRQ1 is suitable for 6 applications: Automotive Infotainment DDR Termination, ADAS Domain Controller Memory Power, DDR3/DDR4 Memory Bus Termination, Telematics and Gateway ECUs, Industrial and Networking Equipment, Battery-Powered Portable Compute.
Automotive Infotainment DDR Termination
The TPS51200QDRCRQ1 is purpose-built for VTT termination rails in automotive infotainment SoC and DRAM subsystems. Its +/-25 mV VTT-to-VTTREF tracking window (DC and AC) directly meets DDR3/DDR4 signal-integrity requirements, while +/-2 A sink/source capability absorbs bidirectional bus currents during read/write bursts. Placed between the VDDQ rail (divided to VDDQ/2 via the integrated VTTREF VLDO) and the DRAM termination resistors, it needs only 20 uF of output capacitance, saving board space. AEC-Q100 Grade 1 (-40C to +105C) coverage suits cockpit electronics.
Recommended
ADAS Domain Controller Memory Power
In ADAS domain controllers, image processors and safety MCUs rely on stable DDR memory buses. The TPS51200QDRCRQ1 provides the termination rail with remote sensing, compensating PCB trace drops between the regulator and dense DRAM clusters to keep VTT accurate at the load. Its fast transient response and low output impedance hold the +/-25 mV tracking window through heavy bus switching, preventing eye-diagram degradation. The EN pin supports power sequencing with S3/S5 sleep states, and only 20 uF of output capacitance is required, easing dense ADAS board layouts.
Recommended
DDR3/DDR4 Memory Bus Termination
For general DDR2/DDR3/DDR3L/DDR4 designs, the TPS51200QDRCRQ1 generates VTT at VDDQ/2 using its integrated VTTREF VLDO or an external reference. A DDR termination regulator must both source and sink current as the address/data bus toggles; the TPS51200-Q1 handles -2 A to +2 A continuously with 3 A peaks while tracking VTTREF within +/-25 mV. This bidirectional capability and 20 uF minimum output capacitance distinguish it from ordinary LDOs, ensuring clean signal integrity for high-speed memory interfaces in computing and networking boards.
Recommended
Telematics and Gateway ECUs
Telematics and gateway ECUs combine connected processors with DDR memory exposed to harsh automotive voltage and temperature environments. The TPS51200QDRCRQ1 accepts a 2.5 V to 6.5 V input, pairing naturally with 3.3 V or 5 V pre-regulated rails from a main automotive PMIC. Its AEC-Q100 qualification and -40C to +105C range align with under-dash ECU requirements, while remote sensing maintains VTT accuracy at the memory despite trace losses. The soft-start limits inrush on battery-backed S3 rails where power budget is critical.
Recommended
Industrial and Networking Equipment
Industrial PCs, switches, and network line cards using DDR memory can adopt the pin-compatible non-Q sibling TPS51200DRCR or reuse TPS51200QDRCRQ1 inventory. The regulator's 3 A peak capability covers high-density DIMM or soldered-DRAM termination loads, and its low-noise linear architecture introduces no switching ripple into the sensitive termination rail - an advantage over DC-DC based VTT solutions. Layout is straightforward: one 20 uF+ ceramic output bank, remote sense lines to the DRAM, and thermal pad to ground pour.
Recommended
Battery-Powered Portable Compute
Portable and battery-backed designs benefit from the TPS51200-Q1's low quiescent current and S3/S5 enable support, which allow the termination regulator to be disabled in sleep states to save power. The 2.5 V to 6.5 V input tolerates 2-cell Li-ion stacks or 5 V rails, and the compact 3x3 mm VSON-10 with only 20 uF of output capacitance fits space-constrained modules such as automotive telematics dongles and embedded compute SOMs. Fast transient response preserves DDR signal integrity during wake transitions from low-power states.
Recommended
Recommended Products Summary
Engineering reference data for TPS51200QDRCRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS51200DRCR | TPS51200MDRCTEP | NCP51200MNTXG |
|---|---|---|---|---|
| Package | VSON-10 (3x3 mm) EP | VSON-10 (3x3 mm) - same | VSON-10 (DRC) - same | VSON-10 / WSON-10 - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Output Current | +/-2 A continuous, 3 A peak | +/-2 A continuous, 3 A peak | +/-2 A continuous, 3 A peak | +/-2 A class |
| Automotive Qualification | AEC-Q100 (-40C to +105C) | Not AEC-Q100 | Enhanced Product (HiRel) | Industrial grade |
| Lifecycle Status | Discontinued by TI (06/2019) | Active | Active | Active |
Key Differentiators
- AEC-Q100 automotive qualification (vs TPS51200DRCR)
- Integrated VTTREF VLDO plus remote sensing (vs APW7120)
- Active production availability (vs TPS51200QDRCRQ1)
Design Notes
Place the minimum 20 uF low-ESR ceramic output bank directly at the VTT and PGND pins, accounting for MLCC DC-bias derating (e.g., 2x10 uF 10V 0805 X7R may deliver under 20 uF effective at VTT bias). Route the VOSNS remote-sense pair as a Kelvin connection to the DRAM termination network, not to the regulator output node, so trace drops do not degrade the +/-25 mV tracking window.
The exposed pad of the VSON-10 (DRC) package is the primary heat path for the +/-2 A sink/source stage. Solder it to at least a 2x2 via-fan-out ground pour on a 4-layer board. At VTT=0.75 V with 1.5 A continuous sink during bus idle-to-active transitions, junction rise stays manageable with the pad connected; a floating pad can cause thermal shutdown during sustained sink current tests.
Drive EN from a sequenced logic rail to implement S3/S5 sleep states; do not hard-tie EN to VDD if the memory controller enters self-refresh with the bus idle, since sink capability is required to discharge residual termination energy. Verify the VLDOIN supply for the VTTREF generator is present whenever VTT is enabled, otherwise the tracking reference is undefined at startup.
The TPS51200QDRCRQ1 is discontinued by TI since June 2019 (Mouser: DISC-BY-MFG-06/19). For new automotive designs, qualify TPS51200MDRCTEP or the pin-compatible onsemi NCP51200MNTXG as the active-production source; for non-automotive builds, the TPS51200DRCR is the natural drop-in. Mixing grades within one program causes qualification mismatch - standardize one grade per platform.
Compliance Information
AEC-Q100 automotive qualified per Arrow listing. RoHS/lead-free per standard TI packaging; verify REACH/halogen status on TI product page.
