My Inquiry
My Account
Texas Instruments TPS51211DSCR
- Part No.:
- TPS51211DSCR
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS51211DSCR.pdf
- Description:
- IC REG CTRLR NOTEBK 1OUT 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS51211DSCR from Texas Instruments is a high-performance, single-channel synchronous step-down controller for notebook power supplies. It operates with 3 V to 28 V input, delivers 0.7 V to 2.6 V output at up to 20 A+, and uses adaptive on-time D-CAP™ control for ultra-fast load transient response in low-voltage point-of-load applications.
For engineers reviewing the TPS51211DSCR datasheet, TPS51211DSCR pinout, TPS51211DSCR application, or TPS51211DSCR equivalent, this page provides verified technical context, validated pin functions, confirmed protection features (OVP/UVP/OCP/thermal shutdown), real-world soft-start and pre-biased start-up behavior, and precise alternative selection guidance for notebook I/O and system rail designs.
Technical Context
The TPS51211DSCR implements adaptive on-time D-CAP™ control-no external compensation required-using output capacitor ESR for current sensing. Its switching frequency is pseudo-constant (~290 kHz nominal), dynamically adjusted via tON ∝ VOUT/VIN and modulated off-time based on VFB vs. ramped 0.7 V reference.
It integrates dual gate drivers: DRVH (VBST-referenced, 1.5 Ω source / 0.7 Ω sink) and DRVL (GND-referenced, 1.0 Ω source / 0.5 Ω sink), with 7–22 ns dead time. Current limiting uses temperature-compensated RDS(on) sensing via TRIP pin (10 μA ±1 μA, 4700 ppm/°C coefficient), while OVP/UVP thresholds are fixed at +120%/–70% of VOUT with 1–2 μs propagation delay.
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 external LDO pre-regulation. |
| Output Voltage Range | 0.7 V to 2.6 V - programmable via resistor divider on VFB, enabling core, I/O, and system rail regulation. |
| Switching Frequency | 266–314 kHz - adaptive on-time architecture maintains stable frequency across input/output variations. |
| VFB Reference Accuracy | ±0.5% (0.697–0.711 V) - ensures tight output voltage regulation over –40°C to 85°C ambient. |
| OCP Trip Current Tempco | 4700 ppm/°C - matches MOSFET RDS(on) drift, maintaining consistent current limit across temperature. |
| Power Good Threshold | +95% to +110% / –5% to –10% window - open-drain PGOOD with 1 ms delay enables reliable system sequencing. |
| Soft-Start Time | 1 ms - internal voltage servo ramps reference linearly, ensuring monotonic VOUT rise even under pre-biased conditions. |
Pinout & Package
TPS51211DSCR is housed in a 10-pin SON (DSC) package with exposed thermal pad tied to GND. The package supports enhanced thermal dissipation (1.54 W at TA = 25°C) and requires thermal vias beneath the pad per TI land pattern UDG-10160.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD (Pin 1) | Open-drain status output | Signals valid regulation after 1 ms delay; sinks up to 6 mA when asserted low during fault. |
| TRIP (Pin 2) | OCP threshold setting input | Sources 10 μA (±1 μA); sets valley current limit by VTRIP = ITRIP × RTRIP, compensated for RDS(on) drift. |
| EN (Pin 3) | Enable logic input | Active-high; enables controller when >1.8 V, disables below 0.5 V; includes internal pull-down for default-off state. |
| VFB (Pin 4) | Feedback input | Compares against 0.7 V internal reference; connects to mid-point of R1/R2 divider to set VOUT. |
| TST (Pin 5) | Production test terminal | Internal test node; must be pulled to GND with ≤470 kΩ resistor in final design to avoid malfunction. |
| DRVL (Pin 6) | Low-side gate driver output | GND-referenced; drives N-channel MOSFET source; 0.5 Ω sink resistance minimizes shoot-through risk. |
| V5IN (Pin 7) | 5 V bias supply input | Requires 4.5–6.5 V external supply; powers DRVL, internal logic, and bootstrap switch; includes UVLO (3.7–4.5 V). |
| SW (Pin 8) | Switch node | 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 | VBST-referenced floating driver; 0.7 Ω sink resistance ensures fast turn-off of high-side N-FET. |
| VBST (Pin 10) | Bootstrap supply input | Connects to 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 external compensation network; leverages output capacitor ESR for current sensing and stability. |
| Pre-charged start-up capability | Supports monotonic ramp from pre-biased VOUT without reverse current or overshoot. |
| Built-in output discharge | Internal SW-to-GND MOSFET discharges output when EN = low; limits discharge current to prevent excessive dV/dt. |
| Integrated boost switch | On-chip MOSFET automatically charges bootstrap capacitor during DRVL-on phase; no external diode needed. |
| Non-latching thermal shutdown | Triggers at 145°C (typical); device resumes operation after die cools below hysteresis threshold (135°C). |
Applications
| Notebook CPU Core Rail | Notebook I/O Supply |
|---|---|
Use Scenario: Regulating 1.1 V core voltage for Intel/AMD mobile processors under dynamic 0–20 A load steps. IC Role / Device Role / Timing Role: Primary buck controller managing high-current, low-voltage POL conversion with sub-μs transient response. Use Value: Adaptive on-time D-CAP™ mode delivers <10 μs recovery from 80% load step without external compensation components. | Use Scenario: Powering DDR3/DDR4 memory interfaces requiring tightly regulated 1.5 V or 1.35 V with fast transient immunity. IC Role / Device Role / Timing Role: Synchronous step-down controller providing stable I/O rail with integrated PGOOD sequencing and OVP/UVP protection. Use Value: 0.5% VFB reference and ±5% PGOOD window ensure memory interface compliance under thermal and aging stress. |
| Notebook System Agent Rail | Embedded PC System Power |
Use Scenario: Delivering 0.95 V system agent (SA) rail for chipset power domains with light-load efficiency requirements. IC Role / Device Role / Timing Role: Controller operating in auto-skip mode at light loads; uses adaptive zero-crossing detection to minimize diode conduction loss. Use Value: Light-load efficiency maintained down to 10 mA via discontinuous conduction mode optimization and valley current detection. | Use Scenario: Providing 1.8 V or 2.5 V system power in industrial embedded PCs where board space and BOM count are constrained. IC Role / Device Role / Timing Role: Compact 10-pin SON controller replacing multi-chip solutions; integrates gate drivers, protection, and soft-start. Use Value: Minimal external components (no compensation, no bootstrap diode) reduce PCB area by >30% versus traditional controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS51221DSCR | Dual-output version with independent channels; identical D-CAP™ control, same pinout except added CH2 pins. | Required for dual-rail systems (e.g., CPU + GPU); not drop-in for single-rail use due to extra pins and control logic. | Select TPS51221DSCR only when dual independent outputs are needed; otherwise TPS51211DSCR offers lower cost and smaller footprint. |
| RT8205AZSP | Fixed 300 kHz frequency; uses external compensation; lacks adaptive zero-crossing and pre-biased start-up. | Suitable for cost-sensitive non-notebook applications where light-load efficiency and fast transients are secondary. | Choose RT8205AZSP for simpler designs with ceramic output caps; avoid if D-CAP™'s ESR-based stability or notebook-grade transient performance is required. |
Compared with TPS51211DSCR, TPS51221DSCR adds channel redundancy but increases complexity and cost for single-rail use, while RT8205AZSP trades transient performance and integration for lower BOM count in less demanding applications.
Availability
TPS51211DSCR is available at Aetrix Electronics and suitable for notebook computers, I/O supplies, and system power supplies requiring stable component supply, long-term lifecycle support, and automotive-qualified thermal performance.
Supply support for TPS51211DSCR 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.
The TPS51211DSCR belongs to TI's notebook power controller product line, designed specifically for low-voltage, high-current point-of-load regulation in space-constrained mobile computing platforms.
FAQ
What is the recommended output capacitor type for stable operation of the TPS51211DSCR?
The TPS51211DSCR requires organic semiconductor or specialty polymer capacitors (SP-CAP) for loop stability. Ceramic capacitors are not recommended because their low ESR causes the 0-dB crossover frequency to exceed 1/4 of the switching frequency, risking instability. SP-CAPs with ~100 μF capacitance and ~10 mΩ ESR satisfy Equation 2 in the datasheet and enable reliable D-CAP™ operation without external compensation.
Does the TPS51211DSCR support pre-biased output start-up?
Yes, the TPS51211DSCR supports pre-biased start-up. Its internal voltage servo soft-start and output discharge circuitry allow monotonic ramp from an externally pre-charged output without reverse current flow or overshoot. This is confirmed in Figure 11 of the SLUSAA7B datasheet and is critical for hot-swap and multi-rail sequencing in notebook platforms.
How is overcurrent protection implemented in the TPS51211DSCR?
The TPS51211DSCR implements cycle-by-cycle overcurrent protection using temperature-compensated RDS(on) sensing. The TRIP pin sources 10 μA (±1 μA) with 4700 ppm/°C coefficient, setting the valley inductor current trip level as VTRIP = ITRIP × RTRIP. During the low-side FET off-time, the controller monitors SW-to-GND voltage and extends off-time if current exceeds the threshold, preventing damage during sustained overload.
What is the function of the TST pin on the TPS51211DSCR?
The TST pin on the TPS51211DSCR is a production test terminal used during wafer sort and final test. In end-equipment, it must be pulled to GND with a resistor ≤470 kΩ to prevent unintended operation or latch-up. Leaving TST floating or connecting it to any active signal violates the absolute maximum ratings and may cause functional failure or erratic behavior.
Can the TPS51211DSCR operate without an external 5-V supply?
No, the TPS51211DSCR requires an external 4.5–6.5 V supply on the V5IN pin to power its internal logic, low-side gate driver, and bootstrap switch. This is explicitly stated in the Recommended Operating Conditions table (V5IN min = 4.5 V) and Absolute Maximum Ratings (V5IN max = 6.5 V). Attempting to operate without V5IN will disable all functionality, including EN, PGOOD, and gate drive outputs.
TPS51211DSCR 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)
TPS51211DSCR FAQ
1.How can I place an order for TPS51211DSCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51211DSCR 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 TPS51211DSCR reliable?
The price and inventory of TPS51211DSCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51211DSCR is usually 5 days.
3.What payment methods are accepted for TPS51211DSCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51211DSCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51211DSCR?
TPS51211DSCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51211DSCR 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 TPS51211DSCR?
For technical support, including TPS51211DSCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51211DSCR requirements.
6.How does Aetrix verify that TPS51211DSCR is sourced from the original manufacturer or authorized distributors?
All TPS51211DSCR 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 TPS51211DSCR meets industry standards.
7.What is the process for return or replacement of TPS51211DSCR?
All TPS51211DSCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS51211DSCR, 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 TPS51211DSCR part is unused and in its original packaging.
Return procedure for TPS51211DSCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS51211DSCR Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
