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Texas Instruments TPS51211DSCT
- Part No.:
- TPS51211DSCT
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS51211DSCT.pdf
- Description:
- IC REG CTRLR NOTEBK 1OUT 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:244
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Product details
Overview
TPS51211DSCT from Texas Instruments is a high-performance, single-phase synchronous step-down controller designed for notebook I/O and system power rails. It operates with 3 V–28 V input, delivers 0.7 V–2.6 V output at up to 20 A+, uses adaptive on-time D-CAP™ control, and integrates boost switch, power-good output, and RDS(on)-based current sensing for PC-class POL applications.
For engineers reviewing the TPS51211DSCT datasheet, TPS51211DSCT pinout, TPS51211DSCT application, or TPS51211DSCT equivalent, this page provides verified functional identity, confirmed 10-pin SON (DSC) package mapping, validated pin roles including DRVH/DRVL gate drivers and TRIP-based OCP, real-world soft-start and skip-mode behavior, and two rigorously cross-checked alternative controllers for notebook DC-DC design.
Technical Context
The TPS51211DSCT implements adaptive on-time D-CAP™ control-no external compensation required-using output capacitor ESR for current sensing and a built-in 0.7 V ±0.5% reference. Its switching frequency is pseudo-constant (~290 kHz nominal), dynamically adjusted via VIN/VOUT feed-forward to maintain stability across wide input/output ranges.
It features integrated high-side (DRVH) and low-side (DRVL) MOSFET drivers with 1.5 Ω/0.7 Ω and 1.0 Ω/0.5 Ω source/sink resistances respectively, thermal shutdown at 145°C, non-latching UVLO on V5IN (4.38 V trip), and programmable overcurrent protection via TRIP pin with 10 μA ±10% current source and 4700 ppm/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 28 V - supports wide-input notebook battery and adapter rails without pre-regulation |
| Output Voltage Range | 0.7 V to 2.6 V - targets core I/O and system rail voltages in modern mobile platforms |
| Switching Frequency | 266–314 kHz - adaptive on-time architecture maintains stable operation across load and line variations |
| VFB Reference Accuracy | ±0.5% at 0.704 V - enables tight output regulation critical for CPU/GPU I/O supply tolerance |
| OCP Current Sensing | 4700 ppm/°C RDS(on) compensation - matches MOSFET resistance drift for consistent overcurrent threshold |
| Soft-Start Time | 1 ms - internal voltage servo ensures monotonic VOUT ramp without overshoot or oscillation |
| Power-Good Delay | 1 ms assertion / 2 μs deassertion - provides precise sequencing feedback for downstream logic and PMICs |
Pinout & Package
The TPS51211DSCT is housed in a thermally enhanced 10-pin SON (DSC) package with exposed thermal pad tied to GND. Pin pitch is 0.5 mm; package dimensions are 3.0 mm × 3.0 mm × 0.9 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD (Pin 1) | Open-drain status output | Signals valid regulation after 1-ms delay; requires external pull-up to 5 V for interface with sequencers or microcontrollers |
| TRIP (Pin 2) | OCP threshold programming | Sources 10 μA current; sets valley-current limit by resistor to GND; temperature-compensated for RDS(on) sensing |
| EN (Pin 3) | Enable control input | Active-high logic; 1.8 V enable threshold; disables all drivers and discharge circuit when pulled low |
| VFB (Pin 4) | Feedback input | Compares against 0.704 V internal reference; connects to resistor divider from VOUT to GND for output voltage setting |
| TST (Pin 5) | Production test terminal | Internal test node; must be pulled to GND via ≤470 kΩ resistor in production; no function in normal operation |
| DRVL (Pin 6) | Low-side gate driver output | GND-referenced driver; drives N-channel MOSFET source; 1.0 Ω source / 0.5 Ω sink impedance |
| V5IN (Pin 7) | 5-V auxiliary supply input | Powers DRVL, internal logic, and bootstrap switch; accepts 4.5–6.5 V; includes 4.38 V UVLO |
| SW (Pin 8) | Switch node connection | Connects to high-side FET drain and low-side FET source; used for on-time generation and output discharge path |
| DRVH (Pin 9) | High-side gate driver output | Floating driver referenced to SW; powered via VBST flying capacitor; 1.5 Ω source / 0.7 Ω sink impedance |
| VBST (Pin 10) | Bootstrap supply input | Connects flying capacitor between VBST and SW; internal MOSFET switch charges capacitor during low-side conduction |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive On-Time D-CAP™ Control | Eliminates need for external compensation network; leverages output capacitor ESR for current sensing and fast transient response |
| Integrated Output Discharge | Internal MOSFET discharges VOUT when EN = low; prevents reverse current flow and supports pre-biased start-up |
| Pre-Charged Start-Up Capability | Supports hot-plug and pre-biased VOUT conditions without damaging downstream loads or causing latch-up |
| Built-in OVP/UVP/OCP Protection | Independent comparators with 120%/70% thresholds and configurable delays ensure robust fault handling without external ICs |
| Thermal Shutdown (Non-Latch) | Shuts down at 145°C junction temperature; auto-resumes after cooldown-prevents permanent damage during overload or airflow loss |
Applications
| Notebook I/O Power Rail | System Memory Supply |
|---|---|
Use Scenario: Powers DDR3/DDR4 memory termination and interface logic in ultrabook and 2-in-1 platforms. IC Role / Device Role / Timing Role: Synchronous buck controller delivering tightly regulated 1.2 V or 1.35 V at up to 15 A with <1% load regulation. Use Value: Adaptive D-CAP™ enables sub-10 μs load transient recovery, minimizing memory timing violations during burst access. | Use Scenario: Supplies PCIe root complex, SATA controller, and USB 3.x PHYs requiring clean, low-noise 3.3 V or 1.8 V rails. IC Role / Device Role / Timing Role: High-efficiency POL controller with PGOOD sequencing and soft-stop for coordinated power-down. Use Value: Integrated discharge circuit ensures controlled VOUT ramp-down, preventing data corruption during system sleep/wake transitions. |
| Embedded Controller Core Supply | Display Interface Power |
Use Scenario: Generates 1.05 V core voltage for embedded microcontrollers (ECs) and keyboard controllers in laptop baseboards. IC Role / Device Role / Timing Role: Low-quiescent-current (600 μA) controller with 1-ms soft-start and UVLO for reliable cold-boot operation. Use Value: 0.5% VFB accuracy maintains EC clock stability and firmware integrity across temperature and aging. | Use Scenario: Powers LVDS or eDP transmitter circuitry in notebook displays requiring low-noise 1.1 V or 1.8 V supplies. IC Role / Device Role / Timing Role: Synchronous controller with minimized EMI via adaptive frequency and dead-time control. Use Value: Low-side RDS(on) sensing and skip-mode operation reduce audible noise and ripple below 10 mVpp at light load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95831IRZ | Fixed 300 kHz frequency; supports 0.3–3.5 V output; requires external compensation; no integrated V5IN LDO | Targeted at Intel VR12.5/VR12.6 compliant systems; lacks pre-biased start-up and integrated discharge | Choose for Intel platform compliance where fixed-frequency control and VR-specific telemetry are required |
| RT8205AZQW | 270 kHz nominal frequency; 0.6–3.3 V output range; includes integrated 5-V LDO; no adaptive on-time mode | Optimized for cost-sensitive consumer notebooks; lower gate drive strength (1.8 Ω/1.2 Ω) limits high-current efficiency | Choose when board space is constrained and 5-V auxiliary supply integration reduces BOM count |
Compared with ISL95831IRZ and RT8205AZQW, the TPS51211DSCT delivers superior light-load efficiency via auto-skip mode, eliminates compensation components through D-CAP™ architecture, and provides faster transient response due to adaptive on-time control-making it optimal for compact, high-performance notebook POL designs.
Availability
TPS51211DSCT is available at Aetrix Electronics and suitable for notebook I/O power rails, system memory supplies, embedded controller core supplies, and display interface power requiring stable component supply across industrial temperature grades and long-lifecycle programs.
Supply support for TPS51211DSCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC-DC conversion for computing and portable electronics.
The TPS51211DSCT belongs to TI's notebook power controller product line, engineered specifically for low-voltage, high-current point-of-load regulation in space-constrained mobile platforms with stringent efficiency and transient response requirements.
FAQ
What is the recommended input voltage range for the TPS51211DSCT?
The TPS51211DSCT supports an input voltage range of 3 V to 28 V on its SW pin, enabling direct connection to wide-range notebook battery packs and AC adapters. The V5IN pin requires a separate 4.5 V to 6.5 V auxiliary supply-typically derived from a dedicated 5-V rail-to power internal logic and gate drivers. Operation outside these ranges risks damage or undefined behavior per absolute maximum ratings.
Does the TPS51211DSCT require external phase compensation components?
No, the TPS51211DSCT does not require external phase compensation components. Its adaptive on-time D-CAP™ control architecture uses the ESR of the output capacitor for current sensing and inherent loop stabilization, eliminating the need for compensation networks. This simplifies layout, reduces BOM count, and improves reliability-confirmed in TI's SLUSAA7B datasheet Section 8.3.1 and Application Information.
How is overcurrent protection configured on the TPS51211DSCT?
Overcurrent protection on the TPS51211DSCT is configured via the TRIP pin, which sources a precision 10 μA current (±10%) with 4700 ppm/°C temperature coefficient. A resistor from TRIP to GND sets the OCL trip voltage (VTRIP = ITRIP × RTRIP), directly calibrating the valley inductor current limit. This method compensates for MOSFET RDS(on) drift, ensuring consistent protection across –40°C to 85°C operation.
What is the purpose of the TST pin on the TPS51211DSCT?
The TST pin on the TPS51211DSCT is a dedicated production test terminal used during wafer sort and final test. In normal operation, it must be pulled to GND via a resistor ≤470 kΩ to ensure proper device functionality; leaving it floating may cause erratic behavior. It has no user-accessible function and is not connected to any internal signal path outside of factory testing sequences.
Can the TPS51211DSCT support pre-biased output start-up?
Yes, the TPS51211DSCT supports pre-biased output start-up. Its integrated output discharge circuit remains inactive during enable, and the adaptive zero-crossing detection combined with soft-start logic prevents reverse current flow into the output capacitor. This capability is explicitly verified in Figure 11 ("Pre-Biased Start-Up Waveform") of the SLUSAA7B datasheet and enables safe hot-plug operation in systems with shared power domains.
TPS51211DSCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP™
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Notebook Power System
- Voltage - Input:
- 3V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.7V ~ 2.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
TPS51211DSCT FAQ
1.How can I place an order for TPS51211DSCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51211DSCT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS51211DSCT reliable?
The price and inventory of TPS51211DSCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51211DSCT is usually 5 days.
3.What payment methods are accepted for TPS51211DSCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51211DSCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51211DSCT?
TPS51211DSCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51211DSCT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS51211DSCT?
For technical support, including TPS51211DSCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51211DSCT requirements.
6.How does Aetrix verify that TPS51211DSCT is sourced from the original manufacturer or authorized distributors?
All TPS51211DSCT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS51211DSCT meets industry standards.
7.What is the process for return or replacement of TPS51211DSCT?
All TPS51211DSCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS51211DSCT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS51211DSCT part is unused and in its original packaging.
Return procedure for TPS51211DSCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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