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Texas Instruments TPS54233QDRQ1
- Part No.:
- TPS54233QDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54233QDRQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,384
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Product details
Overview
TPS54233QDRQ1 from Texas Instruments is an automotive-grade 28-V input, 2-A non-synchronous buck converter with integrated 80-mΩ high-side MOSFET, fixed 300-kHz switching frequency, Eco-mode™ for light-load efficiency, and programmable UVLO. It delivers regulated 3.3-V output in LCD display power supplies and battery charger rails.
For engineers reviewing the TPS54233QDRQ1 datasheet, TPS54233QDRQ1 pinout, TPS54233QDRQ1 application, or TPS54233QDRQ1 equivalent, key selection factors include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), 1-μA shutdown current, adjustable slow-start via SS pin, and overvoltage transient protection for automotive load-dump resilience.
Technical Context
The TPS54233QDRQ1 implements fixed-frequency peak current-mode control with internal slope compensation, enabling stable operation with ceramic output capacitors and simplified loop compensation. Its Eco-mode™ activates below 100-mA peak inductor current, clamping COMP at 0.5 V to skip pulses and reduce switching losses.
Protection architecture includes cycle-by-cycle current limiting, frequency foldback during overcurrent (down to 37.5 kHz), thermal shutdown at 165°C, and overvoltage transient protection that disables the high-side MOSFET when VSENSE exceeds 109% × 0.8 V. The BOOT-PH bootstrap circuit requires a 0.1-μF X7R/X5R capacitor and monitors voltage to prevent high-side turn-on below 2.1 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 automotive distributed systems without external pre-regulation. |
| Output Current | 2 A continuous - sustains full load in car audio amplifiers and LCD backlight drivers. |
| Switching Frequency | 300 kHz (typ) - enables compact magnetics and EMI filtering while avoiding AM band interference. |
| Efficiency at Light Load | >90% at 100 mA (VIN = 12 V) - Eco-mode™ reduces quiescent loss in always-on vehicle modules. |
| Shutdown Quiescent Current | 1 μA (typ) - extends battery life in infotainment standby and telematics sleep modes. |
| Voltage Reference Accuracy | ±2% initial, ±3.5% over temperature - ensures tight output regulation across automotive ambient range. |
| High-Side RDS(on) | 80 mΩ (typ at VIN = 12 V) - minimizes conduction loss and thermal rise in SOIC-8 package. |
Pinout & Package
TPS54233QDRQ1 is housed in an 8-pin SOIC package (D suffix) with exposed pad optimized for thermal performance. Pin 7 (GND) serves as primary thermal path; layout must connect exposed pad to large PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (Pin 1) | Bootstrap supply node | Drives high-side MOSFET gate; requires 0.1-μF X7R/X5R capacitor to PH to sustain >2.1 V boot voltage. |
| VIN (Pin 2) | Main power input | Accepts 3.5–28 V; powers internal circuitry and high-side driver; decoupling capacitor required. |
| EN (Pin 3) | Enable control | Pull below 1.25 V to disable; internal pull-up allows floating-enable; supports resistor-divider UVLO programming. |
| SS (Pin 4) | Slow-start timing | 2-μA internal current charges external capacitor; sets soft-start ramp time (1–10 ms typical). |
| VSENSE (Pin 5) | Feedback input | Inverting input of error amplifier; compares output voltage (via resistor divider) to 0.8-V reference. |
| COMP (Pin 6) | Error amplifier output | Drives PWM comparator; connects to RC network for loop compensation; clamped at 0.5 V in Eco-mode™. |
| GND (Pin 7) | Power and signal ground | Primary return path; exposed pad must be soldered to thermal plane for θJB = 57.0°C/W. |
| PH (Pin 8) | Switch node | Source of internal high-side MOSFET; connects to inductor and BOOT capacitor; high dv/dt node requiring tight layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive power rail reliability requirements. |
| Eco-mode™ pulse skipping | Activates automatically below 100-mA peak inductor current - eliminates light-load switching losses without external control. |
| Integrated boot diode | Eliminates external bootstrap diode - reduces BOM count and layout complexity in space-constrained modules. |
| Overvoltage transient protection (OVTP) | Disables high-side MOSFET if VSENSE > 109% × VREF - limits output overshoot during load dump or fast unload events. |
| Frequency foldback under fault | Reduces fSW to 37.5 kHz during short-circuit - controls inductor current rise and improves fault energy handling. |
Applications
| Infotainment System Power Rail | Automotive LCD Display Backlight |
|---|---|
Use Scenario: Powers SoC core logic and memory in head-unit infotainment systems with variable load profiles and cold-crank immunity. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator delivering up to 2 A with Eco-mode™ maintaining >85% efficiency at 50-mA standby current. Use Value: 1-μA shutdown current extends battery hold-up time; UVLO hysteresis prevents brownout oscillation during engine cranking. | Use Scenario: Supplies regulated 3.3-V bias to LED driver ICs and timing controllers in instrument cluster and center-stack displays. IC Role / Device Role / Timing Role: Non-isolated step-down converter with fixed 300-kHz switching - avoids audible noise in display subsystems. Use Value: Overvoltage transient protection suppresses 12-V load-dump spikes; SOIC-8 thermal design sustains 2-A load at +85°C ambient. |
| Car Audio DSP Power Supply | Telematics Module Battery Charger Interface |
Use Scenario: Generates clean 3.3-V rail for digital signal processors in premium audio amplifiers with low-noise analog sections. IC Role / Device Role / Timing Role: High-efficiency buck converter with ceramic-capacitor compatible current-mode control - minimizes output ripple for sensitive ADC references. Use Value: Internal slope compensation eliminates need for external ramp injection; 80-mΩ RDS(on) reduces thermal stress on PCB. | Use Scenario: Interfaces between 12-V vehicle bus and Li-ion battery charging circuitry in connected-car telematics units. IC Role / Device Role / Timing Role: Pre-regulator stepping 12 V down to 3.3 V for USB-C PD controller and MCU - handles wide input transients per ISO 7637-2. Use Value: Programmable UVLO with hysteresis ensures reliable startup after stop-start cycles; thermal shutdown protects during sustained overloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54231QDRQ1 | 570-kHz switching frequency, same 2-A rating and SOIC-8 package but higher fSW demands smaller inductors. | Better suited for space-constrained designs needing higher power density; less optimal for EMI-sensitive audio circuits. | Select when board area is critical and input ripple can be managed at higher frequency. |
| TPS54331QDRQ1 | 3-A output capability, 285-kHz fSW, identical pinout and feature set except higher current limit and lower switching frequency. | Required for future-proofing 3.3-V rails with >2-A peak loads, such as multi-core MCUs or high-brightness displays. | Choose when system load margin exceeds 2 A or long-term scalability is needed. |
Compared with TPS54233QDRQ1, TPS54231QDRQ1 trades EMI headroom for size reduction, while TPS54331QDRQ1 provides headroom for higher-current derivatives - both retain AEC-Q100 Grade 1 qualification and Eco-mode™ but differ in thermal derating and filter design constraints.
Availability
TPS54233QDRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, LCD display power supplies, and telematics module designs requiring stable component supply with AEC-Q100 compliance and long-lifecycle support.
Supply support for TPS54233QDRQ1 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 automotive electronics with decades of power management innovation.
The TPS54233QDRQ1 belongs to TI's automotive-qualified DC/DC converter portfolio, designed specifically for robust, high-efficiency point-of-load regulation in harsh-temperature vehicle environments.
FAQ
What is the maximum junction temperature specification for the TPS54233QDRQ1?
The TPS54233QDRQ1 features thermal shutdown activation at +165°C junction temperature. Once triggered, the device halts switching until die temperature falls below the threshold, ensuring safe operation under overload or poor heatsinking conditions. This protection is fully specified in the absolute maximum ratings table and validated per AEC-Q100 requirements.
Does the TPS54233QDRQ1 support adjustable output voltage, and what is the minimum achievable value?
Yes, the TPS54233QDRQ1 supports adjustable output voltage using an external resistor divider on the VSENSE pin. The minimum regulated output is constrained by the internal 0.8-V reference voltage, allowing outputs as low as 0.8 V - confirmed in the datasheet's "Adjustable Output Voltage Down to 0.8 V" feature list and electrical characteristics.
How does the Eco-mode™ function in the TPS54233QDRQ1, and at what load does it activate?
Eco-mode™ in the TPS54233QDRQ1 activates automatically when peak inductor current drops below 100 mA (typical), clamping the COMP pin at 0.5 V to skip switching pulses. This reduces light-load quiescent current and improves efficiency - verified in the "Pulse Skipping Eco-mode™" section and typical characteristics curves showing efficiency vs. load at multiple input voltages.
What package type and thermal metrics apply to the TPS54233QDRQ1?
The TPS54233QDRQ1 uses an 8-pin SOIC package (D suffix) with internally optimized thermal pad. Key thermal metrics include θJA = 116.7°C/W, θJB = 57.0°C/W, and ψJB = 56.5°C/W - all measured per JEDEC standards and documented in the Thermal Information table of the datasheet.
Can the TPS54233QDRQ1 be used without an external bootstrap diode?
Yes, the TPS54233QDRQ1 integrates the bootstrap diode, eliminating the need for an external component. This is explicitly stated in the "DETAILED DESCRIPTION" section: "The TPS54233-Q1 reduces the external component count by integrating the boot recharge diode." The BOOT pin requires only a 0.1-μF ceramic capacitor to PH.
TPS54233QDRQ1 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:
- Active
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS54233QDRQ1 FAQ
1.How can I place an order for TPS54233QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54233QDRQ1 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 TPS54233QDRQ1 reliable?
The price and inventory of TPS54233QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54233QDRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54233QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54233QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54233QDRQ1?
TPS54233QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54233QDRQ1 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 TPS54233QDRQ1?
For technical support, including TPS54233QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54233QDRQ1 requirements.
6.How does Aetrix verify that TPS54233QDRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54233QDRQ1 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 TPS54233QDRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54233QDRQ1?
All TPS54233QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54233QDRQ1, 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 TPS54233QDRQ1 part is unused and in its original packaging.
Return procedure for TPS54233QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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