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Texas Instruments TPS62131RGTT
- Part No.:
- TPS62131RGTT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS62131RGTT.pdf
- Description:
- IC REG BUCK 1.8V 3A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:394
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Product details
Overview
TPS62131RGTT from Texas Instruments is a fixed-output 1.8-V, 3-A synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 3 V to 17 V input and delivering up to 3 A continuous output current in a 3-mm × 3-mm QFN-16 package. It integrates power-good signaling, programmable soft-start/tracking, and seamless PWM-to-power-save mode transition for high-efficiency operation in space-constrained POL applications such as solid-state drives and embedded systems.
For engineers reviewing the TPS62131RGTT datasheet, TPS62131RGTT pinout, TPS62131RGTT application, or TPS62131RGTT equivalent, key selection considerations include its fixed 1.8-V output, 17 µA quiescent current in power-save mode, 2.5-MHz (typical) switching frequency, thermal shutdown at 160°C, and compatibility with low-ESR ceramic output capacitors in compact 3×3 mm layouts.
Technical Context
The TPS62131RGTT implements DCS-Control™ - a hybrid regulation topology combining voltage-mode feedback with direct AC output voltage sensing via a fast comparator - enabling both precise DC load regulation and sub-100-ns transient response. Its internal error amplifier and compensated control loop eliminate need for external compensation components.
It operates in two functional modes: PWM mode (2.5 MHz typical, FSW = Low) for medium/heavy loads and power-save mode with linearly decreasing switching frequency at light loads - all without output voltage disturbance. The device supports 100% duty-cycle operation down to VIN ≈ VOUT + IOUT × (RDS(on)_HS + RL) for extended battery runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single/multi-cell Li-ion batteries and standard 12-V intermediate rails without external pre-regulation. |
| Output Voltage | Fixed 1.8 V ±1.5% - internally trimmed; eliminates external resistor divider and improves thermal performance vs adjustable versions. |
| Max Output Current | 3 A continuous - enabled by low RDS(on) (90 mΩ HS / 40 mΩ LS at VIN ≥6 V) and 4.5°C/W bottom-side thermal resistance. |
| Quiescent Current | 17 µA (typical) - sustains >85% efficiency at 1-mA load, critical for always-on subsystems in mobile PCs and ePOS terminals. |
| Switching Frequency | 2.5 MHz (typical, FSW = Low) - enables use of ≤1-µH inductors and <22-µF ceramic output capacitance for ultra-compact designs. |
| Power-Good Output | Open-drain PG with 92–98% VOUT threshold - provides reliable rail sequencing signal; requires external pullup to ≤7 V. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design; auto-recovery after cooldown. |
Pinout & Package
TPS62131RGTT is housed in a thermally enhanced 16-pin VQFN package (RGT), 3.00 mm × 3.00 mm body size, with exposed thermal pad soldered to AGND/PGND ground plane for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3 SW | Switch Node | Connection point for external inductor; carries high di/dt switching current - must be routed short and wide to minimize EMI and voltage spikes. |
| 4 PG | Power-Good Output | Open-drain status flag indicating VOUT within ±2% regulation; requires external pullup resistor (e.g., 10 kΩ to 3.3 V). |
| 5 FB | Feedback Input | Internally connected to fixed 1.8-V reference; recommended to tie directly to AGND for improved thermal stability and noise immunity. |
| 6 AGND | Analog Ground | Reference for control circuitry; must be tied directly to exposed thermal pad and system ground plane to prevent noise coupling into error amplifier. |
| 7 FSW | Frequency Select | Logic input: Low = 2.5 MHz (default), High = 1.25 MHz; internal 400-kΩ pulldown ensures safe startup at high frequency. |
| 8 DEF | Output Voltage Scale | Logic input: Low = 1.8 V nominal, High = 1.89 V (+5%); internal pulldown maintains nominal output if left unconnected. |
| 9 SS/TR | Soft-Start/Tracking | Capacitor-programmable ramp control; enables monotonic start-up into pre-biased rails and voltage tracking with master supplies. |
| 10 AVIN | Analog Supply | Provides bias for control logic; must connect to same source as PVIN to avoid supply mismatch and startup failure. |
| 11,12 PVIN | Power Stage Input | High-current input for MOSFET drivers; parallel routing with AVIN minimizes IR drop and ensures stable gate drive under load transients. |
| 13 EN | Enable Input | Active-high logic control; internal 400-kΩ pulldown ensures default disable state; supports precise power-rail sequencing. |
| 14 VOS | Voltage Sense Input | Direct connection to output capacitor for accurate remote sensing; improves load regulation in high-current POL applications. |
| 15,16 PGND | Power Ground | Return path for high-current switch node; must be tied directly to exposed thermal pad and low-impedance ground plane. |
| Exposed Pad | Thermal & Electrical Ground | Electrically connected to AGND and PGND; mandatory soldering required for thermal performance and mechanical reliability. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ Topology | Enables <10-µs load transient response with <1% undershoot/overshoot while maintaining stable operation without external compensation. |
| Seamless Power-Save Transition | Eliminates audible noise and output voltage glitches during mode switching - critical for noise-sensitive RF and audio subsystems. |
| 100% Duty-Cycle Mode | Extends usable input range down to ~1.9 V at 3-A load (VOUT + IOUT × RDS(on)_HS), maximizing battery life in portable Li-ion applications. |
| Integrated Short-Circuit Protection | Reduces current limit to 1.6 A when VOUT < 0.5 V, preventing thermal runaway during output faults while preserving IC integrity. |
| Programmable Soft-Start | External capacitor on SS/TR sets controlled VOUT ramp time (e.g., 100 nF ≈ 1-ms rise), limiting inrush current into large output capacitance banks. |
Applications
| Solid-State Drives (SSD) | Embedded Industrial Controllers |
|---|---|
|
Use Scenario: Powers 1.8-V NAND flash memory and controller ICs in M.2 and U.2 SSD modules with tight thermal constraints. IC Role / Device Role / Timing Role: Primary POL regulator delivering clean, regulated 1.8 V at up to 3 A with fast transient response to handle burst read/write operations. Use Value: DCS-Control™ ensures <50-mV output deviation during 2-A load steps, preventing data corruption during high-speed NAND access. |
Use Scenario: Supplies 1.8-V FPGA I/O banks and microcontroller peripherals in DIN-rail mounted PLCs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-density, thermally robust DC-DC stage replacing discrete buck solutions and LDOs in space-limited industrial enclosures. Use Value: 45°C/W junction-to-ambient thermal resistance and 125°C max operating junction temperature enable full 3-A output without derating in convection-cooled environments. |
| Mobile Point-of-Sale (ePOS) Terminals | Server Management Controllers (BMC) |
|
Use Scenario: Powers 1.8-V image sensor interfaces and secure element ICs in handheld wireless payment terminals powered by 3.7-V Li-ion batteries. IC Role / Device Role / Timing Role: Battery-efficient POL converter supporting 100% duty-cycle operation down to 2.0 V input, extending operational runtime per charge cycle. Use Value: 17 µA quiescent current in power-save mode reduces standby power loss by >40% versus comparable 3-A converters, prolonging battery life in sleep states. |
Use Scenario: Supplies 1.8-V auxiliary logic and SPI/I2C interface circuits in server baseboard management controllers requiring high reliability and long-term availability. IC Role / Device Role / Timing Role: Pin-compatible upgrade path from TPS62140/TPS62150 with identical layout - simplifies qualification and reduces redesign risk. Use Value: Same 3×3 mm QFN-16 footprint and pinout enables drop-in replacement without PCB changes, accelerating BMC firmware validation cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62132RGTT | Fixed 3.3-V output; identical pinout, package, and feature set except output voltage and DEF pin behavior. | Used where 3.3-V logic rails dominate (e.g., USB PHY, Ethernet MAC), not 1.8-V memory or FPGA I/O. | Select TPS62132RGTT only when system-level voltage requirements mandate 3.3 V - no change to layout or BOM beyond output cap value. |
| TPS62140RGTT | Adjustable output (0.9–6 V); same 3×3 mm QFN-16 package but uses FB pin for external resistor divider instead of fixed internal reference. | Required for designs needing dynamic voltage scaling or multiple output voltages from one regulator family. | Choose TPS62140RGTT if output voltage flexibility outweighs board area savings - adds two resistors but retains identical thermal and electrical performance. |
Compared with TPS62131RGTT, TPS62132RGTT offers identical form-factor and reliability but targets 3.3-V systems, while TPS62140RGTT trades fixed-voltage simplicity for design flexibility at the cost of added external components and slightly higher layout sensitivity.
Availability
TPS62131RGTT is available at Aetrix Electronics and suitable for solid-state drives, embedded industrial controllers, and mobile point-of-sale terminals requiring stable component supply, long lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62131RGTT 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 technologies, with decades of expertise in high-efficiency DC-DC conversion and automotive-grade reliability.
The TPS6213x product line was designed specifically for high-power-density point-of-load applications in space-constrained, thermally demanding environments - including SSDs, mobile computing, and industrial automation systems.
FAQ
What is the maximum continuous output current of the TPS62131RGTT?
The TPS62131RGTT delivers up to 3 A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 12 V, VOUT = 1.8 V). This rating assumes proper PCB layout with adequate copper area on AGND/PGND planes and the exposed thermal pad fully soldered to minimize junction temperature rise.
Does the TPS62131RGTT require external compensation components?
No, the TPS62131RGTT does not require external compensation components. Its DCS-Control™ topology integrates an internally compensated regulation network optimized for small ceramic output capacitors (≥22 µF) and low-ESR inductors, eliminating the need for external RC networks typically required in voltage-mode or current-mode controllers.
Can the TPS62131RGTT operate with an input voltage lower than 3 V?
No, the TPS62131RGTT has a minimum recommended input voltage of 3 V and an absolute maximum rating of –0.3 V on AVIN/PVIN pins. Below 2.7 V (UVLO threshold), the device disables switching and enters undervoltage lockout - it will not regulate or deliver output current until VIN exceeds 2.9 V (2.7 V + 200-mV hysteresis).
How is the power-good (PG) signal configured on the TPS62131RGTT?
The TPS62131RGTT's PG pin is an open-drain output that goes high-impedance when VOUT is within 92–98% of 1.8 V and pulls low when VOUT drops below 87–94%. It requires an external pullup resistor (typically 4.7–10 kΩ to ≤7 V) and can sink up to 2 mA. During shutdown or UVLO, PG becomes high-impedance - matching TPS62130 behavior.
Is the TPS62131RGTT pin-compatible with other devices in the TPS6213x family?
Yes, the TPS62131RGTT shares identical pinout, package (VQFN-16 RGT), and footprint with TPS62130, TPS62130A, TPS62132, and TPS62133. This allows direct substitution in existing layouts when changing output voltage requirements - only output capacitor and optional feedback resistor (if used) need adjustment.
TPS62131RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS62131RGTT FAQ
1.How can I place an order for TPS62131RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62131RGTT 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 TPS62131RGTT reliable?
The price and inventory of TPS62131RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62131RGTT is usually 5 days.
3.What payment methods are accepted for TPS62131RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62131RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62131RGTT?
TPS62131RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62131RGTT 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 TPS62131RGTT?
For technical support, including TPS62131RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62131RGTT requirements.
6.How does Aetrix verify that TPS62131RGTT is sourced from the original manufacturer or authorized distributors?
All TPS62131RGTT 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 TPS62131RGTT meets industry standards.
7.What is the process for return or replacement of TPS62131RGTT?
All TPS62131RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62131RGTT, 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 TPS62131RGTT part is unused and in its original packaging.
Return procedure for TPS62131RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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