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Texas Instruments TPS54233DRG4
- Part No.:
- TPS54233DRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54233DRG4.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
TPS54233DRG4 from Texas Instruments is a 28 V input, 2 A non-synchronous buck DC/DC converter with integrated 80 mΩ high-side MOSFET, fixed 300 kHz switching frequency, Eco-mode™ for light-load efficiency, and adjustable output down to 0.8 V. It delivers stable 3.3 V at 2 A in consumer power supplies such as LCD displays and set-top boxes.
For engineers reviewing the TPS54233DRG4 datasheet, TPS54233DRG4 pinout, TPS54233DRG4 application, or TPS54233DRG4 equivalent, key selection criteria include input UVLO programmability, 1 μA shutdown current for battery-powered use, overvoltage transient protection, thermal shutdown at 165°C, and compatibility with ceramic output capacitors in SOIC-8 layouts.
Technical Context
The TPS54233DRG4 employs peak current mode control with internal slope compensation to stabilize operation above 50% duty cycle and simplify external compensation. Its Eco-mode™ activates automatically when peak inductor current drops below 100 mA, clamping COMP at 0.5 V to skip pulses and reduce switching losses.
It integrates boot recharge diode logic and monitors BOOT–PH voltage (threshold ~2.1 V) to prevent high-side MOSFET conduction during insufficient gate drive. Overvoltage transient protection triggers at 109% × VREF (~0.872 V), forcing high-side shutdown until VSENSE falls below 107% × VREF (~0.856 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 28 V - supports 5 V, 12 V, and 24 V distributed systems without external regulators |
| Output Current | 2 A continuous - sufficient for powering SoCs, FPGAs, and interface ICs in embedded peripherals |
| Switching Frequency | Fixed 300 kHz - enables predictable EMI filtering and consistent inductor sizing across designs |
| Shutdown Quiescent Current | 1 μA typical - extends battery life in always-on or low-duty-cycle portable applications |
| Voltage Reference | 0.8 V ±2% initial accuracy - sets precise output regulation via external resistor divider (e.g., 3.3 V with R5=10.2 kΩ, R6=3.24 kΩ) |
| High-Side RDS(on) | 80 mΩ at VBOOT–PH = 6 V, VIN = 12 V - minimizes conduction loss and thermal rise at full load |
| Eco-mode™ Threshold | 100 mA peak inductor current - enables automatic transition to pulse-skipping for >90% efficiency at <100 mA loads |
| Thermal Shutdown | 165°C junction temperature - provides fail-safe protection during overload or poor heatsinking |
Pinout & Package
TPS54233DRG4 is housed in an 8-pin SOIC package (4.90 mm × 3.90 mm body size) optimized for thermal performance on standard PCBs. The exposed pad variant (DRG4 suffix) enhances thermal dissipation but does not require solder connection per TI's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects 0.1 μF X7R/X5R ceramic capacitor to PH; enables gate drive for integrated high-side MOSFET |
| VIN | Main input supply | Accepts 3.5–28 V; powers internal circuitry and high-side driver; requires local 10 μF ceramic decoupling |
| EN | Enable / UVLO control | Pull below 1.25 V to disable; float or bias via resistor divider to program input UVLO hysteresis |
| SS | Slow-start timing | 2 μA internal current source charges external capacitor; sets soft-start ramp time (1–10 ms typical) |
| PH | Power switch node | Source of internal high-side MOSFET; connects to inductor and bootstrap capacitor; carries full switching current |
| GND | Power and signal ground | Common reference for all analog and power circuits; must be low-impedance plane under IC |
| COMP | Error amplifier output | Drives PWM comparator; connect RC network to GND for Type II/III compensation with ceramic output caps |
| VSENSE | Feedback input | Inverting input of transconductance error amp; compares against 0.8 V reference to regulate output voltage |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot diode | Eliminates external Schottky diode, reducing BOM count and board area in SOIC-8 footprint |
| Overvoltage transient protection | Clamps output overshoot during load dump or fault recovery by disabling high-side MOSFET above 109% × VREF |
| Frequency foldback | Reduces switching frequency to 37.5 kHz under severe overload (VSENSE < 0.2 V), limiting inductor current runaway |
| Programmable UVLO | Two-resistor EN bias network allows custom start/stop thresholds (e.g., 8 V start / 7 V stop) with hysteresis |
| Cycle-by-cycle current limit | Monitors switch current each cycle; trips at 2.3–3.5 A depending on VIN, preventing MOSFET failure during short circuits |
| WEBENCH® support | TI's online design tool generates complete schematics, BOMs, and stability analysis for TPS54233DRG4-based converters |
Applications
| Consumer Set-Top Box Power | Industrial 24V Distributed Supply |
|---|---|
Use Scenario: Powers video decoder SoC and HDMI PHY in cable/satellite receiver with 12 V input rail. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 3.3 V at up to 2 A with fast transient response to burst-mode video processing loads. Use Value: Eco-mode™ maintains >92% efficiency at standby (50 mA), while overvoltage protection prevents damage during hot-plug HDMI events. | Use Scenario: Converts 24 V factory bus to 5 V for PLC I/O modules in harsh industrial environments. IC Role / Device Role / Timing Role: Non-isolated buck converter operating continuously at full load; relies on thermal shutdown and frequency foldback for robustness. Use Value: 28 V absolute max rating and 165°C thermal trip ensure reliable operation despite 24 V line surges and ambient temperatures up to 85°C. |
| Car Audio Head Unit Supply | USB-C Peripheral Charger |
Use Scenario: Generates 5 V from automotive battery (9–16 V) for DSP, display, and Bluetooth subsystems. IC Role / Device Role / Timing Role: Input-UVLO-programmable buck regulator enabling cold-crank operation down to 6.5 V with hysteresis. Use Value: 1 μA shutdown current preserves battery during ignition-off; 300 kHz switching avoids AM radio band interference. | Use Scenario: Provides 3.3 V auxiliary rail in USB-C PD adapter for MCU, LED indicators, and communication ICs. IC Role / Device Role / Timing Role: Secondary regulator powered from main 5 V/9 V/15 V PD output; operates only during active charging. Use Value: Adjustable slow start (via SS pin) prevents inrush into downstream USB enumeration circuitry; SOIC-8 simplifies layout near primary controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54231DR | 570 kHz fixed frequency, same 2 A rating and 28 V input, but higher RDS(on) (115 mΩ), no Eco-mode™ | Better suited for space-constrained designs needing smaller inductors; less efficient below 200 mA | Select TPS54231DR only if higher switching frequency is required and light-load efficiency is secondary |
| TPS54331DR | 3 A output, same 28 V input, 570 kHz, includes power-good flag; larger SOIC-8 footprint with thermal pad | Supports higher-current rails (e.g., 5 V @ 2.5 A); requires different PCB layout and thermal management | Choose TPS54331DR when future-proofing for >2 A loads or when power-good signaling is mandatory |
Compared with TPS54233DRG4, TPS54231DR trades light-load efficiency for higher-frequency operation and smaller magnetics, while TPS54331DR offers headroom for current growth at the cost of increased board area and thermal complexity.
Availability
TPS54233DRG4 is available at Aetrix Electronics and suitable for consumer electronics, industrial power supplies, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS54233DRG4 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.
The TPS54233DRG4 belongs to TI's SWIFT™ DC/DC converter family-engineered for high-efficiency, easy-to-design non-synchronous buck regulation in cost-sensitive, thermally constrained applications.
FAQ
What is the minimum input voltage required for TPS54233DRG4 to operate?
The TPS54233DRG4 requires a minimum input voltage of 3.5 V to enable normal operation, as specified in its recommended operating conditions. Below this threshold, the internal undervoltage lockout circuit disables switching. This ensures reliable startup from 5 V, 12 V, and 24 V rails common in consumer and industrial systems, and aligns with the TPS54233DRG4's design for distributed power architectures where input droop must be tolerated.
Does TPS54233DRG4 support ceramic output capacitors?
Yes, the TPS54233DRG4 fully supports ceramic output capacitors due to its current-mode control architecture with internal slope compensation. TI's datasheet confirms stable operation with X7R/X5R ceramics (e.g., 47 μF), and the WEBENCH® design tool provides validated compensation networks. This eliminates the need for high-ESR electrolytics, reducing size and improving transient response-key for TPS54233DRG4 deployments in space-constrained LCD displays and peripherals.
How does Eco-mode™ function in TPS54233DRG4?
Eco-mode™ in the TPS54233DRG4 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 and boosts efficiency to >90% at light loads. The TPS54233DRG4 exits Eco-mode™ when load increases and COMP rises above 0.5 V-no external control is needed, making it ideal for battery-powered set-top boxes and always-on audio subsystems.
Can the UVLO threshold of TPS54233DRG4 be adjusted?
Yes, the TPS54233DRG4's input UVLO threshold is programmable using two external resistors connected to the EN pin. The internal 3 μA pull-up current source enables a simple voltage divider that sets distinct start and stop voltages (e.g., 8.0 V start / 7.2 V stop). This feature is documented in Section 8.3.4 of the TPS54233DRG4 datasheet and allows customization for automotive cold-crank or industrial brown-out scenarios without modifying the TPS54233DRG4's core functionality.
What protection features does TPS54233DRG4 include?
The TPS54233DRG4 integrates cycle-by-cycle current limiting, frequency foldback during overloads, overvoltage transient protection (triggering at 109% × VREF), and thermal shutdown at 165°C. These features act independently: OVTP suppresses output spikes during fault recovery, frequency foldback prevents inductor saturation under short circuits, and thermal shutdown halts operation before junction damage occurs-ensuring robust field reliability for TPS54233DRG4 in unattended equipment like CPE and industrial controllers.
TPS54233DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, 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:
- 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS54233DRG4 FAQ
1.How can I place an order for TPS54233DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54233DRG4 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 TPS54233DRG4 reliable?
The price and inventory of TPS54233DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54233DRG4 is usually 5 days.
3.What payment methods are accepted for TPS54233DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54233DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54233DRG4?
TPS54233DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54233DRG4 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 TPS54233DRG4?
For technical support, including TPS54233DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54233DRG4 requirements.
6.How does Aetrix verify that TPS54233DRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54233DRG4 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 TPS54233DRG4 meets industry standards.
7.What is the process for return or replacement of TPS54233DRG4?
All TPS54233DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54233DRG4, 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 TPS54233DRG4 part is unused and in its original packaging.
Return procedure for TPS54233DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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