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Texas Instruments TPS62131RGTR
- Part No.:
- TPS62131RGTR
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS62131RGTR.pdf
- Description:
- IC REG BUCK 1.8V 3A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,137
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Product details
Overview
TPS62131RGTR from Texas Instruments is a synchronous step-down DC-DC converter optimized for high-power-density POL applications. It delivers up to 3-A continuous output current at a fixed 1.8-V output, operates from 3-V to 17-V input, features DCS-Control™ topology for fast transient response, and integrates power-good signaling and 100% duty-cycle mode for battery-end-of-life support in portable systems.
For engineers reviewing the TPS62131RGTR datasheet, TPS62131RGTR pinout, TPS62131RGTR application, or TPS62131RGTR equivalent, key selection criteria include its 1.8-V fixed output, 16-pin VQFN (3 mm × 3 mm) package, 2.5-MHz typical switching frequency, 17-µA quiescent current in power-save mode, and seamless PWM-to-PSM transition - all critical for Li-ion-powered embedded systems requiring stable, compact, and efficient voltage regulation.
Technical Context
The TPS62131RGTR implements DCS-Control™, combining voltage-mode feedback with direct output-voltage sensing to achieve tight DC regulation and sub-100-ns load-step response. Its dual-mode operation-PWM at medium/heavy loads (2.5 MHz nominal) and power-save mode at light loads-maintains >85% efficiency from 1 mA to 3 A without external mode control.
It supports full system integration via dedicated pins: SS/TR enables monotonic pre-biased start-up and voltage tracking; DEF allows ±5% output margining; FSW selects between 1.25 MHz and 2.5 MHz; and open-drain PG provides rail sequencing capability. Thermal shutdown (160°C) and undervoltage lockout (2.7 V with 200-mV hysteresis) ensure robust operation across industrial temperature ranges (–40°C to 125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single/dual Li-ion batteries and standard 12-V intermediate rails without external regulators. |
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors, reduces BOM count, and ensures ±1% initial accuracy over temperature. |
| Max Output Current | 3 A continuous - sustains full load under worst-case thermal conditions (RθJA = 45°C/W) with proper PCB layout. |
| Quiescent Current | 17 µA typical - enables >1000-hour standby in always-on IoT nodes powered by 2000-mAh Li-ion cells. |
| Switching Frequency | 2.5 MHz (FSW = Low) - permits use of ≤1-µH inductors and 22-µF ceramic output capacitors for <3-mm footprint designs. |
| Power-Good Output | Open-drain PG with 95% VOUT threshold - provides reliable enable sequencing for FPGAs, SoCs, and DDR memory rails. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
TPS62131RGTR is housed in a thermally enhanced 16-pin VQFN package (RGT), 3.00 mm × 3.00 mm body size, with an exposed thermal pad soldered to AGND/PGND for optimal power dissipation and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3 SW | Switch node | Connects internal high-/low-side MOSFETs to external inductor; requires low-inductance routing to minimize switching losses and EMI. |
| 4 PG | Power-good indicator | Open-drain output signals VOUT ≥95% nominal; requires external pullup to ≤7 V for sequencing microcontrollers or downstream converters. |
| 5 FB | Feedback reference | Internally tied to fixed 1.8-V divider; must be connected to AGND per TI layout guidelines to optimize thermal performance. |
| 6 AGND | Analog ground | Reference for control circuitry; must be shorted directly to exposed thermal pad and shared ground plane to avoid noise coupling. |
| 7 FSW | Frequency select | Pull Low for 2.5 MHz (high density); pull High for 1.25 MHz (higher efficiency); internal 400-kΩ pulldown ensures default high-frequency operation. |
| 8 DEF | Output voltage scaling | Pull Low for 1.8 V; pull High for 1.89 V (±5% margining); internal pulldown enables default nominal regulation without external components. |
| 9 SS/TR | Soft-start/tracking | External capacitor sets output ramp time; supports pre-biased start-up and synchronized voltage ramping with master supplies. |
| 10 AVIN | Analog supply | Bias for control logic; connect to same source as PVIN but route separately to reduce noise injection into sensitive analog blocks. |
| 11,12 PVIN | Power-stage input | High-current path for MOSFETs; requires low-ESR bulk capacitance near pins to suppress input ripple and prevent UVLO triggering. |
| 13 EN | Enable input | Active-High logic; internal 400-kΩ pulldown ensures safe default-off state; enables precise power-rail sequencing with external controllers. |
| 14 VOS | Voltage sense | Direct connection to output for accurate regulation; improves load/line regulation by closing control loop at point-of-load. |
| 15,16 PGND | Power ground | Return path for high-current switch node; must be tied to exposed thermal pad and AGND to minimize ground bounce and thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <10-µs load-transient recovery with <1% output deviation using only 22-µF ceramic output capacitance. |
| 100% duty-cycle mode | Extends usable battery life by maintaining 1.8-V regulation down to VIN = VOUT + IOUT × (RDS(on) + RL) ≈ 1.95 V at 3 A. |
| Seamless PWM-to-PSM transition | Eliminates audible noise and output voltage glitches during mode change, critical for noise-sensitive RF and audio subsystems. |
| Programmable soft-start | Prevents inrush current spikes >5 A during cold start; configurable ramp time avoids brownout in multi-rail systems. |
| Integrated short-circuit protection | Reduces peak fault current to 1.6 A when VOUT < 0.5 V, limiting thermal stress and enabling self-recovery without latch-off. |
Applications
| Mobile PC Core Power | Solid-State Drive (SSD) Rail |
|---|---|
Use Scenario: Powers CPU/GPU core logic in ultra-thin notebooks using single-cell Li-ion (3.0–4.2 V) or 12-V adapter input. IC Role / Device Role / Timing Role: Primary POL regulator delivering tightly regulated 1.8-V core voltage with <±1% line/load regulation and <50-ns response to 2-A load steps. Use Value: Enables dynamic voltage scaling and deep-sleep modes while maintaining SoC stability across battery discharge curve. | Use Scenario: Supplies 1.8-V I/O interface for NVMe SSD controllers operating from 3.3-V or 12-V system rails. IC Role / Device Role / Timing Role: Point-of-load converter with integrated PG signal to coordinate SSD power-up sequence with host controller reset timing. Use Value: Reduces solution size by 40% vs discrete buck + LDO approach and eliminates external sequencing ICs. |
| Embedded Industrial Controller | Point-of-Sale (ePOS) Terminal |
Use Scenario: Provides main 1.8-V supply for ARM Cortex-M7 microcontroller and peripheral interfaces in factory automation PLCs. IC Role / Device Role / Timing Role: Robust DC-DC regulator with thermal shutdown and UVLO, supporting extended industrial temperature range (–40°C to 125°C). Use Value: Ensures uninterrupted operation during voltage sags on 24-V DC field buses and withstands repeated thermal cycling. | Use Scenario: Powers secure element, display driver, and contactless reader ICs in retail ePOS terminals powered by 12-V wall adapters. IC Role / Device Role / Timing Role: Compact, low-noise POL converter with programmable soft-start to prevent display flicker during cold boot. Use Value: Meets EN55022 Class B EMI limits without shielding, reducing certification cost and time-to-market. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62132RGTR | Fixed 3.3-V output; identical pinout, package, and feature set. | Used where higher I/O voltage is required for legacy peripherals or level-shifting interfaces. | Select when system architecture mandates 3.3-V logic rails instead of 1.8-V core voltage. |
| TPS62140RGTR | Adjustable output (0.9–6 V); pin-compatible with TPS62131RGTR but lacks DEF pin functionality. | Suitable for multi-voltage systems needing flexible output programming via external resistor divider. | Choose when design requires post-production voltage tuning or multiple output variants from same PCB layout. |
Compared with TPS62131RGTR, TPS62132RGTR offers identical reliability and thermal performance but targets 3.3-V applications, while TPS62140RGTR trades fixed-output simplicity for adjustable regulation - both require no PCB changes but differ in voltage-setting methodology and margining capability.
Availability
TPS62131RGTR is available at Aetrix Electronics and suitable for mobile PCs, solid-state drives, embedded industrial controllers, and point-of-sale terminals requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for TPS62131RGTR 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.
The TPS6213x product line was designed specifically for space-constrained, high-current POL applications in portable and industrial electronics, emphasizing minimal external component count, ultra-low quiescent current, and seamless light-load efficiency.
FAQ
What is the output voltage tolerance of the TPS62131RGTR under full load and temperature range?
The TPS62131RGTR maintains a fixed 1.8-V output with ±1% initial accuracy at room temperature and ±2% total variation over –40°C to 125°C junction temperature, including line, load, and temperature effects - verified per Section 7.5 of the SLVSAG7F datasheet. This ensures reliable operation for 1.8-V I/O standards like LPDDR4 and MIPI D-PHY without external calibration.
Does the TPS62131RGTR support pre-biased output start-up?
Yes, the TPS62131RGTR supports monotonic pre-biased start-up: when enabled, it prevents reverse current flow by holding both MOSFETs off until the internal soft-start ramp exceeds the existing output voltage. This behavior is confirmed in Section 8.3.2 and Figure 9-35 of the datasheet, making TPS62131RGTR suitable for hot-swap and multi-rail sequencing applications.
How does the TPS62131RGTR handle thermal overload conditions?
The TPS62131RGTR incorporates a junction temperature sensor that triggers thermal shutdown at 160°C (typical), turning off both power MOSFETs and placing the PG pin in high-impedance state. After cooling by ≥20°C hysteresis, it automatically resumes regulation with full soft-start - a behavior documented in Section 8.3.7 and Table 7.1, ensuring robustness in enclosed or high-ambient environments.
Can the TPS62131RGTR operate with input voltage below 3 V?
No - the absolute minimum input voltage is 3 V per Section 7.3 Recommended Operating Conditions. Below this, undervoltage lockout (UVLO) disables switching; the threshold is 2.7 V (typical) with 200-mV hysteresis. Attempting operation below 3 V risks erratic behavior or failure to regulate, as confirmed in Section 8.3.6 and Table 7.1 of the TPS62131RGTR datasheet.
Is the TPS62131RGTR pin-compatible with other members of the TPS6213x family?
Yes, the TPS62131RGTR shares identical 16-pin VQFN (RGT) packaging and pinout with TPS62130, TPS62130A, TPS62132, and TPS62133 - explicitly stated in Section 1 Features and Table 5 Device Comparison. This enables drop-in replacement for different output voltages (1.8 V, 3.3 V, 5.0 V) or adjustable versions without PCB redesign.
TPS62131RGTR 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)
TPS62131RGTR FAQ
1.How can I place an order for TPS62131RGTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62131RGTR 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 TPS62131RGTR reliable?
The price and inventory of TPS62131RGTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62131RGTR is usually 5 days.
3.What payment methods are accepted for TPS62131RGTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62131RGTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62131RGTR?
TPS62131RGTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62131RGTR 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 TPS62131RGTR?
For technical support, including TPS62131RGTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62131RGTR requirements.
6.How does Aetrix verify that TPS62131RGTR is sourced from the original manufacturer or authorized distributors?
All TPS62131RGTR 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 TPS62131RGTR meets industry standards.
7.What is the process for return or replacement of TPS62131RGTR?
All TPS62131RGTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62131RGTR, 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 TPS62131RGTR part is unused and in its original packaging.
Return procedure for TPS62131RGTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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