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Texas Instruments TPS65131RGER
- Part No.:
- TPS65131RGER
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS65131RGER.pdf
- Description:
- IC REG BUCK BOOST ADJ DL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,343
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Product details
Overview
TPS65131RGER from Texas Instruments is a dual-output DC-DC converter IC generating independent positive (up to +15 V) and negative (down to –15 V) rails from a 2.7–5.5 V input, with 2 A switch current limit on both outputs, 89% (VPOS) and 81% (VNEG) peak efficiency, and integrated overvoltage/thermal/UVLO protection - used in AMOLED display power supplies for industrial HMI and medical devices.
For engineers reviewing the TPS65131RGER datasheet, TPS65131RGER pinout, TPS65131RGER application, or TPS65131RGER equivalent, key selection considerations include dual-rail sequencing control via ENP/ENN pins, ±15 V output adjustability, 1.25–1.5 MHz fixed-frequency PWM operation, and VQFN-24 thermal performance (RθJA = 34.1°C/W).
Technical Context
The TPS65131RGER implements two independent fixed-frequency PWM regulators: a boost converter for VPOS and an inverting buck-boost for VNEG, sharing only a common oscillator and internal 1.213 V reference. Each stage operates in continuous conduction mode (CCM) under typical loads and supports optional pulse-skipping power-save mode via PSP/PSN pins.
It features separate enable inputs (ENP/ENN), dedicated feedback pins (FBP/FBN), compensation networks (CP/CN), and a battery-switch gate driver (BSW) for full load disconnect. Protection includes per-rail overvoltage detection (±5% threshold), input UVLO (2.1–2.7 V), and thermal shutdown at 150°C with 5°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, 3-cell alkaline/NiMH, or regulated 3.3/5 V rails without external LDO pre-regulation. |
| VPOS Output Range | Up to +15 V - adjustable via resistor divider on FBP pin; enables high-bias voltage for AMOLED source drivers and LCD gate ICs. |
| VNEG Output Range | Down to –15 V - adjustable via resistor divider on FBN pin; provides negative bias for display column drivers and op-amp rails. |
| Switch Current Limit | 1.95 A (typ) per rail - higher than TPS65130's 0.8 A, enabling >500 mA output at mid-input voltages (e.g., 3.6 V → ±10 V). |
| Efficiency | 89% (VPOS), 81% (VNEG) - reduces thermal load in space-constrained displays and extends battery runtime in portable HMIs. |
| Quiescent Current | 500 µA (typ) - low no-load consumption critical for always-on industrial panels and medical monitors. |
| Shutdown Current | 1.5 µA (max) - ensures minimal battery drain during system sleep modes. |
| Switching Frequency | 1.25–1.5 MHz - allows use of compact 4.7 µH inductors and reduces EMI filtering requirements. |
Pinout & Package
TPS65131RGER uses a thermally enhanced 4-mm × 4-mm VQFN-24 package (RGE) with exposed thermal pad for PCB heat dissipation. Pin count is 24, with 2 NC (no-connect) terminals and dual ground planes (AGND and PGND) for analog/digital separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENP (Pin 8) | Positive output enable input | Logic HIGH enables VPOS rail; supports flexible power-up sequencing with independent soft-start. |
| ENN (Pin 10) | Negative output enable input | Logic HIGH enables VNEG rail; allows asymmetric startup (e.g., VPOS first, then VNEG) to prevent display latch-up. |
| FBP (Pin 22) | Positive output feedback input | Connects to resistor divider from VPOS; regulates output using internal 1.213 V reference for ±3% DC accuracy. |
| FBN (Pin 16) | Negative output feedback input | Connects to resistor divider referenced to VREF; achieves stable –15 V with <±0.024 V regulation error. |
| BSW (Pin 7) | Battery switch gate driver | Drives external P-channel FET to fully disconnect VPOS path from VIN when disabled - prevents battery leakage. |
| CP (Pin 21) | Boost converter compensation | External RC network sets loop stability for VPOS; required for reliable transient response across load steps. |
| CN (Pin 18) | Inverting converter compensation | External RC network sets loop stability for VNEG; critical for maintaining regulation during fast negative load transients. |
| VREF (Pin 17) | Internal reference output | 1.213 V ±1.3% reference; bypassed with 220 nF capacitor; serves as precision bias for FBN divider and system monitoring. |
| PGND (Pins 2,3) | Power ground return | Low-impedance return path for high-current switch nodes (INP/INN/OUTN); must be connected to thermal pad for RθJB = 12.2°C/W. |
| AGND (Pin 19) | Analog ground reference | Reference for feedback and control circuits; isolated from PGND to minimize noise coupling into regulation loops. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM regulators | Enables non-symmetrical rail generation (e.g., +12 V / –5 V) with separate enable, soft-start, and power-save control per output. |
| 2 A per-rail switch current limit | Supports higher output currents than TPS65130 (0.8 A), enabling use in larger displays (≥10") and multi-channel DAC/ADC supplies. |
| Integrated load disconnect (BSW) | Eliminates VPOS battery drain path via external PMOS - essential for long-term storage and safety-critical medical devices. |
| Per-rail overvoltage protection | Shuts down individual converter if VPOS or VNEG exceeds setpoint by >5%, protecting downstream display drivers and analog circuitry. |
| 1.25–1.5 MHz fixed switching frequency | Reduces inductor size and EMI filter footprint vs lower-frequency converters; compatible with standard 4.7 µH shielded inductors. |
| Thermal shutdown with hysteresis | 150°C trip point with 5°C hysteresis prevents thermal oscillation during sustained overload or poor PCB heatsinking. |
Applications
| AMOLED Display Power Supply | Industrial HMI Bias Rails |
|---|---|
Use Scenario: Powering source/gate driver ICs in 7–15" AMOLED panels for factory HMIs and medical diagnostic displays. IC Role / Device Role / Timing Role: Generates precise +12 V and –8 V rails with independent sequencing to avoid panel flicker or latch-up during power-up. Use Value: 2 A per-rail capability delivers >400 mA at ±10 V from 3.6 V input, supporting high-resolution panels without external current boosting. |
Use Scenario: Providing split-rail supply for differential op-amps and comparators in elevator control panels and building automation thermostats. IC Role / Device Role / Timing Role: Delivers stable ±15 V rails with <3% DC accuracy and low ripple (<20 mVpp) for precision analog signal conditioning. Use Value: Integrated UVLO and thermal shutdown ensure fail-safe operation in unventilated enclosures with ambient temperatures up to 85°C. |
| Portable Test Equipment | DAC/ADC Reference Supply |
Use Scenario: Powering handheld oscilloscopes and multimeters requiring isolated ±12 V for analog front-end and ADC drivers. IC Role / Device Role / Timing Role: Supplies low-noise, sequenced dual rails from a single Li-ion cell; BSW pin enables full battery isolation during device off-state. Use Value: 1.5 µA shutdown current extends shelf life beyond 12 months; 500 µA quiescent current supports ultra-low-power sleep modes. |
Use Scenario: Generating matched ±5 V rails for high-resolution (16+ bit) SAR ADCs and precision DACs in data acquisition modules. IC Role / Device Role / Timing Role: Provides tightly regulated, low-drift rails with independent enable control to synchronize analog section power with digital controller wake-up. Use Value: VREF pin offers 1.213 V ±1.3% reference for external DAC/ADC calibration, eliminating need for separate voltage reference IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65130RGER | 0.8 A per-rail switch current limit; lower max output current at same input voltage. | Suitable for smaller displays (<7") and low-current analog rails where 200–300 mA suffices. | Select when cost sensitivity outweighs current demand; shares identical pinout and layout but requires recalculation of feedback dividers for same VPOS/VNEG. |
| MAX17504ATP+ | Single-channel, wide-input (4.5–60 V), higher VPOS capability (up to +60 V), no integrated VNEG generator. | Requires external inverting stage for negative rail; used in industrial PLCs with 24 V bus input. | Choose only when input exceeds 5.5 V or VPOS > 15 V is needed; not a drop-in replacement due to different topology and pin count (20-pin TQFN). |
Compared with TPS65130RGER, the TPS65131RGER delivers ~2.4× higher output current per rail, enabling larger displays and higher analog channel counts; compared with MAX17504ATP+, it integrates both rails in one package but lacks high-voltage input support - making it optimal for battery-powered, space-constrained dual-rail systems.
Availability
TPS65131RGER is available at Aetrix Electronics and suitable for industrial HMI, portable medical monitors, and test equipment requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.
Supply support for TPS65131RGER 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 and display power solutions.
The TPS6513x product line was designed specifically for compact, high-reliability dual-rail power in AMOLED/LCD displays and precision analog systems - emphasizing low noise, independent sequencing, and robust fault protection.
FAQ
What is the maximum output current capability of the TPS65131RGER at ±10 V from a 3.6 V input?
The TPS65131RGER delivers up to 750 mA at +10 V and 650 mA at –10 V when powered from 3.6 V, based on Figure 6-2 and Figure 6-4 in the datasheet. This exceeds the TPS65130RGER's 300 mA limit at the same conditions, enabling higher-resolution display drivers and multi-channel analog supplies without derating.
Does the TPS65131RGER support independent power sequencing between VPOS and VNEG outputs?
Yes, the TPS65131RGER supports full independent sequencing via dedicated ENP (Pin 8) and ENN (Pin 10) inputs. Asserting ENP before ENN ensures VPOS stabilizes first - preventing reverse bias on display panels. Both pins accept 0 V (disable) or VIN-level (enable) logic, with built-in soft-start (≈1 ms ramp) per rail.
How does the BSW pin function in the TPS65131RGER, and what external component is required?
The BSW pin (Pin 7) is an open-drain gate driver that pulls low when ENP is asserted, turning on an external P-channel MOSFET (e.g., Si2323DS) placed between VIN and the boost inductor. This breaks the DC path to prevent battery discharge when VPOS is disabled - a critical feature for medical and portable devices requiring zero standby leakage.
What is the purpose of the VREF pin on the TPS65131RGER, and how must it be decoupled?
The VREF pin (Pin 17) outputs a precision 1.213 V ±1.3% reference used internally for feedback regulation and externally as a calibration source. It must be bypassed to AGND with a 220 nF ceramic capacitor (X5R/X7R) placed within 2 mm of the pin; this minimizes noise and ensures stable FBN divider operation for accurate VNEG regulation.
Can the TPS65131RGER operate with input voltages below 2.7 V, and what happens at the UVLO threshold?
The TPS65131RGER enters undervoltage lockout (UVLO) when VIN drops below 2.1–2.7 V (typical 2.35 V). Below this, all converters disable, quiescent current falls to ≤1.5 µA, and BSW goes high-impedance. Operation resumes only after VIN rises above the UVLO threshold plus hysteresis - ensuring clean restart without brownout oscillation.
TPS65131RGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive and Negative (Dual Rail)
- Topology:
- Boost, Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.2V, -2V
- Voltage - Output (Max):
- 15V, -15V
- Current - Output:
- 1.8A (Switch)
- Frequency - Switching:
- 1.38MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TPS65131RGER FAQ
1.How can I place an order for TPS65131RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65131RGER 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 TPS65131RGER reliable?
The price and inventory of TPS65131RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65131RGER is usually 5 days.
3.What payment methods are accepted for TPS65131RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65131RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65131RGER?
TPS65131RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65131RGER 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 TPS65131RGER?
For technical support, including TPS65131RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65131RGER requirements.
6.How does Aetrix verify that TPS65131RGER is sourced from the original manufacturer or authorized distributors?
All TPS65131RGER 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 TPS65131RGER meets industry standards.
7.What is the process for return or replacement of TPS65131RGER?
All TPS65131RGER units undergo pre-shipment inspection (PSI). If there is an issue with TPS65131RGER, 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 TPS65131RGER part is unused and in its original packaging.
Return procedure for TPS65131RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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