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Texas Instruments TPS54231DRG4
- Part No.:
- TPS54231DRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54231DRG4.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,862
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Product details
Overview
TPS54231DRG4 from Texas Instruments is a 2-A, 28-V input non-synchronous step-down DC-DC converter with integrated 80-mΩ high-side MOSFET, fixed 570-kHz switching frequency, adjustable output down to 0.8 V, and Eco-mode™ for light-load efficiency-used in 5-V/12-V/24-V distributed power systems and LCD displays.
For engineers reviewing the TPS54231DRG4 datasheet, TPS54231DRG4 pinout, TPS54231DRG4 application, or TPS54231DRG4 equivalent, key selection criteria include input voltage range (3.5–28 V), shutdown current (1 μA typ), pulse-skipping threshold (100 mA typ), thermal shutdown (165°C), and SOIC-8 package compatibility with ceramic output capacitors.
Technical Context
The TPS54231DRG4 implements constant-frequency peak-current mode control with internal slope compensation, enabling stable operation with ceramic output capacitors and simplified loop compensation. Its transconductance error amplifier (92 μA/V) drives the PWM comparator with 2.7-MHz unity-gain bandwidth and 800-V/V DC gain.
It features programmable UVLO via EN pin resistive divider, overvoltage transient protection clamping at 109% × VREF, and frequency foldback reducing switching frequency to 570 kHz / 8 during severe overload when VSENSE < 0.2 V-ensuring robust startup and fault recovery without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 28 V - supports wide industrial and automotive supply rails without pre-regulation. |
| Output Current | 2 A continuous - sufficient for powering FPGAs, microcontrollers, and display logic rails. |
| Switching Frequency | 570 kHz (typ) - enables compact magnetics and low-output-ripple designs with ≤15 μH inductors. |
| Shutdown Quiescent Current | 1 μA (typ) - extends battery life in always-on or standby applications like set-top boxes. |
| Eco-mode™ Threshold | 100 mA (typ) peak inductor current - automatically skips pulses below this level to maintain >85% efficiency at 10-mA loads. |
| Voltage Reference | 0.8 V ±2% initial accuracy - sets precise output regulation; adjustable down to 0.8 V via external resistor divider. |
| Thermal Shutdown | 165°C - protects against sustained overload or poor PCB thermal design; auto-restarts upon cooldown. |
Pinout & Package
TPS54231DRG4 is housed in an 8-pin SOIC (D package), 4.90 mm × 3.90 mm body size, optimized for thermal performance with exposed pad not present (standard SOIC). Pin functions are validated per TI SLUS851D Rev D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects 0.1-μF X7R/X5R ceramic capacitor to PH; supplies gate drive for internal high-side MOSFET; monitored for UVLO (2.1 V typical). |
| VIN | Main power input | Accepts 3.5–28 V; powers internal bias circuits and high-side driver; absolute max 30 V. |
| EN | Enable & UVLO control | Pulled up internally; disable by pulling <1.25 V; used with two resistors to program hysteresis on input undervoltage lockout. |
| SS | Slow-start timing | 2-μA internal current source charges external capacitor; sets soft-start time (1–10 ms typical) to limit inrush into output capacitance. |
| VSENSE | Feedback input | Inverting input of error amplifier; compares output voltage (via resistor divider) to 0.8-V reference; triggers OVTP at 109% × VREF. |
| COMP | Error amplifier output | Transconductance output (92 μA/V); connects to RC network for loop compensation; clamped at 0.5 V in Eco-mode. |
| GND | Power and signal ground | Common return for VIN, PH, BOOT, SS, COMP, VSENSE, and EN; requires low-impedance PCB connection. |
| PH | Power switch node | Source of internal high-side MOSFET; connects to inductor and output filter; carries full switching current and di/dt noise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 80-mΩ High-Side MOSFET | Enables 2-A continuous output without external switch; reduces BOM count and layout complexity in space-constrained designs. |
| Pulse-Skipping Eco-mode™ | Activates automatically below ~100 mA load to maintain >85% efficiency at light loads-critical for energy-sensitive consumer electronics. |
| Overvoltage Transient Protection (OVTP) | Clamps high-side MOSFET off when VSENSE exceeds 109% × 0.8 V (0.872 V), limiting output overshoot during unloading or fault recovery. |
| Programmable UVLO with Hysteresis | Uses EN pin + two resistors to set custom start/stop thresholds (e.g., 7 V start / 5.5 V stop), preventing brownout oscillation in noisy supply environments. |
| Internal Slope Compensation | Eliminates need for external ramp injection; ensures stable current-mode control at duty cycles >50% with ceramic or low-ESR output capacitors. |
Applications
| Set-Top Box Power Supply | LCD Display Bias Rail |
|---|---|
|
Use Scenario: Powers 3.3-V and 1.8-V logic rails in cable/satellite receivers with variable input (12 V or 24 V wall adapter). IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated low-noise DC from unregulated input; handles dynamic load steps from video decoding and HDMI interface activity. Use Value: Eco-mode™ maintains >88% efficiency at standby currents (~20 mA), extending system sleep duration without compromising wake-up responsiveness. |
Use Scenario: Generates 5-V backlight supply and 3.3-V panel logic rail from 12-V or 24-V industrial display power bus. IC Role / Device Role / Timing Role: Non-isolated step-down converter with fast transient response; regulates output despite large load steps from backlight dimming and frame buffer access. Use Value: 570-kHz fixed frequency allows small 10-μH inductor and 47-μF ceramic output cap-reducing board area by 40% vs lower-frequency alternatives. |
| Industrial 24-V Distributed Power | Battery-Powered Peripheral Charger |
|
Use Scenario: Provides isolated 5-V auxiliary rail for I/O modules and sensors in PLC backplanes fed from 24-V field bus. IC Role / Device Role / Timing Role: Robust point-of-load regulator with thermal shutdown and cycle-by-cycle current limit; withstands 28-V surges and 150°C ambient. Use Value: 165°C thermal shutdown and 5.3-A current limit protect against sustained short-circuit faults-eliminating need for external fuse or current monitor. |
Use Scenario: Charges USB-powered peripherals (e.g., Bluetooth headsets, smart pens) from single-cell Li-ion (3.0–4.2 V) or 5-V USB host, stepping up to 5.25 V. IC Role / Device Role / Timing Role: Buck converter operating in dropout (VIN ≈ VOUT) with 1-μA shutdown current; enables multi-week shelf life in shipped devices. Use Value: 1-μA shutdown quiescent current prevents battery drain during storage-meeting IEC 62368-1 leakage requirements for portable accessories. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54232DRG4 | 1-MHz switching frequency; same 2-A rating, 3.5–28-V input, but higher switching loss at heavy loads. | Better suited for ultra-compact designs needing smaller inductors; less optimal for noise-sensitive analog rails due to higher EMI. | Select when board space is constrained and output ripple filtering can accommodate higher-frequency harmonics. |
| TPS54331DR | 3-A output capability; identical 570-kHz frequency and SOIC-8 package; higher RDS(on) (60 mΩ vs 80 mΩ) but larger die. | Supports higher current loads (e.g., FPGA core rails); requires more thermal margin on PCB due to higher power dissipation at 2 A. | Choose when future-proofing for 2.5–3-A peak loads or when sharing layout with higher-current variants in production scaling. |
Compared with TPS54231DRG4, TPS54232DRG4 trades light-load efficiency for smaller passive size via 1-MHz operation, while TPS54331DR offers headroom for current growth at the cost of thermal derating-making TPS54231DRG4 the optimal balance for 2-A, noise-aware, thermally constrained 570-kHz designs.
Availability
TPS54231DRG4 is available at Aetrix Electronics and suitable for consumer electronics, industrial power supplies, and battery-powered peripherals requiring stable component supply, long-term lifecycle support, and TI-qualified manufacturing traceability.
Supply support for TPS54231DRG4 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-reliability DC-DC conversion.
The TPS54231DRG4 belongs to TI's SWIFT™ family of integrated buck regulators, designed specifically for cost-sensitive, space-constrained applications demanding high efficiency across light-to-full load-especially in consumer, computing, and industrial power rails.
FAQ
What is the minimum input voltage required for TPS54231DRG4 to operate?
The TPS54231DRG4 requires a minimum input voltage of 3.5 V for normal operation, as defined by its internal undervoltage lockout (UVLO) threshold. Below this, the device ceases switching-even if the EN pin is asserted-ensuring reliable startup only when sufficient input energy is available. The actual UVLO threshold is 3.5 V (rising) with hysteresis programmable via the EN pin.
Does TPS54231DRG4 support ceramic output capacitors?
Yes, TPS54231DRG4 fully supports ceramic output capacitors due to its internal slope compensation and current-mode control architecture. The datasheet provides stability guidelines and WEBENCH®-validated designs using 33–100 μF X7R/X5R ceramics. Derating for DC bias effects is recommended, as capacitance drops significantly above rated voltage.
How does Eco-mode™ function in TPS54231DRG4?
In TPS54231DRG4, Eco-mode™ activates automatically when peak inductor current falls below ~100 mA, causing the COMP pin voltage to clamp at 0.5 V and skip switching cycles. This reduces switching losses dramatically at light loads-boosting efficiency to >85% at 10 mA-while maintaining regulation via infrequent bursts of energy into the output capacitor.
What is the purpose of the BOOT pin on TPS54231DRG4?
On TPS54231DRG4, the BOOT pin supplies gate-drive voltage to the internal high-side MOSFET via a 0.1-μF ceramic capacitor connected to the PH pin. An internal UVLO monitors BOOT–PH voltage and disables the MOSFET if it drops below ~2.1 V, preventing shoot-through and ensuring safe bootstrap recharge during each switching cycle.
Can TPS54231DRG4 be used in battery-powered applications?
Yes, TPS54231DRG4 is well-suited for battery-powered applications due to its 1-μA typical shutdown quiescent current and Eco-mode™ operation. When disabled via the EN pin, it draws negligible current-enabling multi-month shelf life in devices like remote controls or IoT sensors powered by coin cells or Li-ion batteries.
TPS54231DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 2A
- Frequency - Switching:
- 570kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS54231DRG4 FAQ
1.How can I place an order for TPS54231DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54231DRG4 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 TPS54231DRG4 reliable?
The price and inventory of TPS54231DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54231DRG4 is usually 5 days.
3.What payment methods are accepted for TPS54231DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54231DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54231DRG4?
TPS54231DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54231DRG4 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 TPS54231DRG4?
For technical support, including TPS54231DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54231DRG4 requirements.
6.How does Aetrix verify that TPS54231DRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54231DRG4 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 TPS54231DRG4 meets industry standards.
7.What is the process for return or replacement of TPS54231DRG4?
All TPS54231DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54231DRG4, 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 TPS54231DRG4 part is unused and in its original packaging.
Return procedure for TPS54231DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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