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Texas Instruments TPS628304ADRLR
- Part No.:
- TPS628304ADRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-583
- Datasheet:
-
TPS628304ADRLR.pdf
- Description:
- IC REG BUCK ADJ 4A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:3,391
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Product details
Overview
TPS628304ADRLR from Texas Instruments is a 4-A synchronous step-down DC/DC converter in an 8-pin SOT583 package, operating from 2.25V to 5.5V input and delivering adjustable output from 0.5V to 4.5V with ±1% feedback voltage accuracy over –40°C to 125°C. It features DCS-Control topology, 2.0 MHz switching frequency, 7 µA quiescent current, and hiccup-mode overcurrent protection - optimized for high-density power rails in portable industrial and embedded systems.
For engineers reviewing the TPS628304ADRLR datasheet, TPS628304ADRLR pinout, TPS628304ADRLR application, or TPS628304ADRLR equivalent, key selection criteria include its 4-A output capability in compact SOT583, 100% duty-cycle operation for ultra-low dropout, active output discharge, power-good signaling, and CISPR-compliant EMI performance enabled by integrated on-chip noise-filtering capacitors.
Technical Context
The TPS628304ADRLR implements DCS-Control topology with adaptive constant-on-time modulation, enabling seamless transition between PWM (2 MHz fixed) and PFM modes based on load. Its fast comparator architecture ensures excellent transient response even with minimal output capacitance.
It supports dual conduction modes via the MODE pin: forced-PWM for low-noise, fixed-frequency operation or power-save mode for high light-load efficiency. Protection includes thermal shutdown (150°C trip), hiccup OCP (5.9 A typical peak current limit), UVLO (2.15 V threshold), and active output discharge during disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25 V to 5.5 V - supports single-cell Li-ion, USB PD, and wide-input industrial rails. |
| Output Current | 4 A continuous - delivers full rated current with thermal derating above 105°C junction temperature. |
| Feedback Accuracy | ±1% over –40°C to 125°C - enables precise regulation of ASIC/SoC core voltages without external trimming. |
| Switching Frequency | 2.0 MHz nominal - allows use of small 0.47 µH inductors and reduces EMI fundamental energy in sensitive bands. |
| Quiescent Current | 7 µA - extends battery runtime in always-on subsystems like camera sensors or MCU sleep modes. |
| High-Side RDS(on) | 35 mΩ (typ.) at VIN ≥ 5 V - minimizes conduction loss and thermal rise under full load. |
| Low-Side RDS(on) | 18 mΩ (typ.) at VIN ≥ 5 V - improves efficiency in buck conversion and aids fast transient recovery. |
| Soft-Start Time | 300 µs - controls inrush current during power-up and prevents brownout in shared input rails. |
Pinout & Package
TPS628304ADRLR uses an 8-pin SOT583 package (1.6 mm × 2.1 mm), optimized for manufacturability and thermal performance in space-constrained layouts. The pinout matches TI's DRL package standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.25–5.5 V; requires local 3 µF effective input capacitance placed adjacent to minimize loop inductance. |
| GND | Ground reference | Primary return path for power and control circuits; must be connected to low-impedance PCB ground plane. |
| MODE | Digital mode select | Pulled low for PSM/PWM auto-switching; pulled high for forced-PWM; compatible with 1.2 V GPIO logic levels. |
| FB | Feedback input | Monitors resistive divider output; 0.5 V reference enables 0.5–4.5 V adjustable regulation with ±1% accuracy. |
| VOS | Output voltage sense | Direct connection after inductor improves load regulation and transient response by sensing true output node. |
| PG | Open-drain power-good | Signals valid regulation (94–98% VOUT) with 128 µs startup delay; requires external pullup ≤ 5.5 V. |
| SW | Power switch node | Connects to inductor; carries high di/dt; requires tight layout and Kelvin connection for VOS. |
| EN | Enable control | Active-high logic; 0.35 V low threshold enables direct MCU GPIO control; 100 nA shutdown current. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers fast transient response with <10 µF total output capacitance, reducing BOM count and board area. |
| Integrated noise-filtering capacitors | Reduces high-frequency EMI emissions >450 MHz, enabling CISPR 11/32 Class A/B compliance without added ferrites. |
| 100% duty-cycle operation | Supports minimum VIN–VOUT differential down to RDS(on) × IOUT, extending usable battery range in portable devices. |
| Active output discharge | Discharges output via SW pin sink (75–400 mA) when disabled, preventing floating rail issues in multi-rail sequencing. |
| Hiccup-mode OCP | Repeats 9.6 ms off-time bursts during sustained overload, allowing safe thermal recovery without latch-off failure. |
| Thermal shutdown with 20°C hysteresis | Protects against sustained overloads or poor heatsinking; resumes operation automatically after junction cools below 130°C. |
Applications
| Solid State Drive (SSD) Power Rail | Industrial PC Core Supply |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM buffer in M.2 NVMe SSDs with tight thermal and size constraints. IC Role / Device Role / Timing Role: Primary 1.2 V/4 A point-of-load regulator delivering stable core voltage during burst write operations. Use Value: 2 MHz switching and DCS-Control ensure <50 mV output deviation during 0→4 A transients, preserving data integrity. | Use Scenario: Supplies FPGA or SoC core voltage in fanless industrial PCs exposed to ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: High-efficiency 4 A buck converter with thermal monitoring and power-good sequencing for system boot reliability. Use Value: ±1% FB accuracy and 100% duty cycle maintain regulation across full battery discharge (4.2 V → 3.0 V), extending runtime. |
| Analog Security Camera Sensor Bias | Factory Automation I/O Module |
Use Scenario: Generates clean 3.3 V bias for CMOS image sensors in IP cameras where EMI must not interfere with video signal chain. IC Role / Device Role / Timing Role: Low-noise, CISPR-compliant power stage with integrated filtering capacitors and controlled slew-rate gate drive. Use Value: On-chip decoupling eliminates need for external high-frequency caps, reducing radiated emissions by >10 dBµV/m at 500 MHz. | Use Scenario: Provides isolated 1.8 V supply for microcontroller and communication peripherals (RS-485, CAN) in modular PLC I/O bases. IC Role / Device Role / Timing Role: Robust 4 A regulator with hiccup OCP and active discharge supporting hot-swap and fault recovery in distributed control networks. Use Value: Active output discharge clears residual voltage within 10 ms after disable, enabling safe module replacement without system shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628304ARZER | Same 4 A rating and electrical specs, but in 1.0 mm × 2.0 mm WQFN (RZE) package with higher power density. | Preferred for ultra-compact designs where thermal resistance (RθJA = 77.6°C/W) and board area are critical. | Select TPS628304ARZER when maximizing power density outweighs assembly simplicity; SOT583 offers easier rework and lower cost in medium-volume production. |
| TPS62933RTER | 4 A, 2.5–6.5 V input, 0.4–5.5 V output, 1.5% FB accuracy, 1.8 MHz, but uses voltage-mode control and lacks integrated EMI capacitors. | Requires external EMI filtering and larger output capacitance for equivalent transient performance. | Choose TPS62933RTER only if wider input range or different control-loop behavior is required; TPS628304ADRLR provides superior EMI and transient response out-of-box. |
Compared with TPS628304ARZER, the TPS628304ADRLR trades 12% higher RθJA for simplified assembly and rework; versus TPS62933RTER, it delivers tighter regulation, lower EMI, and faster load steps without design iteration - making it optimal for time-sensitive industrial and imaging applications.
Availability
TPS628304ADRLR is available at Aetrix Electronics and suitable for solid-state drives, industrial PCs, analog security cameras, and factory automation I/O modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS628304ADRLR 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-reliability DC/DC conversion.
The TPS62830x product line was designed specifically for high-current, space-constrained point-of-load applications in portable and industrial electronics - emphasizing efficiency, EMI robustness, and thermal resilience without sacrificing ease of use.
FAQ
What is the maximum continuous output current supported by the TPS628304ADRLR?
The TPS628304ADRLR is rated for 4 A continuous output current under recommended operating conditions. At full load and ambient temperatures above 60°C, thermal derating applies per the device's RθJA = 80°C/W (EVM) and junction temperature limit of 125°C. For sustained 4 A operation, ensure adequate PCB copper area and airflow to maintain TJ ≤ 105°C per datasheet guidance.
Does the TPS628304ADRLR support adjustable output voltage, and what is the range?
Yes, the TPS628304ADRLR supports fully adjustable output voltage from 0.5 V to 4.5 V using an external resistor divider on the FB pin. Its internal 0.5 V reference and ±1% accuracy over –40°C to 125°C enable precise regulation for ASIC, SoC, and MCU core supplies without trimming components.
How does the MODE pin affect operation of the TPS628304ADRLR?
The MODE pin selects conduction mode: pulled low enables automatic PSM/PWM transition for highest light-load efficiency; pulled high forces continuous PWM mode for lowest output ripple and fixed 2.0 MHz frequency. It accepts 1.2 V logic levels and can be dynamically toggled during operation without reset.
What protection features are integrated into the TPS628304ADRLR?
The TPS628304ADRLR integrates thermal shutdown (150°C trip, 20°C hysteresis), hiccup-mode overcurrent protection (5.9 A typical peak limit), undervoltage lockout (2.15 V rising threshold), active output discharge, and power-good monitoring. It does not include latch-off OVP - that feature is exclusive to TPS62830xB variants.
Is the TPS628304ADRLR compliant with CISPR EMI standards?
Yes, the TPS628304ADRLR facilitates CISPR 11/32 compliance through integrated on-chip noise-filtering capacitors, optimized gate driver slew rate control, and minimized switch-node ringing. Radiated emission test data (Figure 7-6) confirms Class A/B compliance at 3 m distance using standard EVM layout and BOM.
TPS628304ADRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-583
- 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):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 4.5V
- Current - Output:
- 4A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
TPS628304ADRLR FAQ
1.How can I place an order for TPS628304ADRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628304ADRLR 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 TPS628304ADRLR reliable?
The price and inventory of TPS628304ADRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628304ADRLR is usually 5 days.
3.What payment methods are accepted for TPS628304ADRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628304ADRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628304ADRLR?
TPS628304ADRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628304ADRLR 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 TPS628304ADRLR?
For technical support, including TPS628304ADRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628304ADRLR requirements.
6.How does Aetrix verify that TPS628304ADRLR is sourced from the original manufacturer or authorized distributors?
All TPS628304ADRLR 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 TPS628304ADRLR meets industry standards.
7.What is the process for return or replacement of TPS628304ADRLR?
All TPS628304ADRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628304ADRLR, 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 TPS628304ADRLR part is unused and in its original packaging.
Return procedure for TPS628304ADRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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