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Texas Instruments TPS628303BDRLR
- Part No.:
- TPS628303BDRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-583
- Datasheet:
-
TPS628303BDRLR.pdf
- Description:
- IC REG BUCK ADJ 3A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:3,964
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Product details
Overview
TPS628303BDRLR from Texas Instruments is a 3-A synchronous step-down DC/DC converter in an 8-pin SOT583 package, operating from 2.25 V to 5.5 V input and delivering 0.5 V to 4.5 V adjustable output with ±1% feedback voltage accuracy across –40°C to 125°C. It integrates 35 mΩ high-side and 18 mΩ low-side MOSFETs, uses DCS-Control topology, and supports latch-off OCP/OVP protection for industrial power rails.
For engineers reviewing the TPS628303BDRLR datasheet, TPS628303BDRLR pinout, TPS628303BDRLR application, or TPS628303BDRLR equivalent, key selection criteria include its 3-A output capability, latch-off fault response, 2.0 MHz switching frequency, 7 µA quiescent current, and SOT583 footprint compatibility with space-constrained embedded systems requiring robust overvoltage and short-circuit protection.
Technical Context
The TPS628303BDRLR implements DCS-Control architecture with adaptive on-time modulation, enabling seamless transition between PWM and PFM modes while maintaining fast transient response with minimal output capacitance. Its internal reference enables 0.5 V output regulation with 1% FB accuracy over full temperature range.
It features a dedicated MODE pin for conduction mode selection (PSM/PWM), active output discharge via SW pin, power-good open-drain output with window comparator, and integrated thermal shutdown at 150°C with 20°C hysteresis. The latch-off OCP/OVP behavior-triggered after 32 consecutive current-limit cycles-requires VIN or EN cycling for recovery.
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 supplies without external LDO pre-regulation. |
| Output Current | 3 A continuous - delivers stable power to ASICs, SoCs, and multi-core MCUs under dynamic load conditions. |
| Feedback Accuracy | ±1% over –40°C to 125°C - ensures tight output regulation across automotive and industrial temperature extremes. |
| Switching Frequency | 2.0 MHz - enables use of sub-1 µH inductors and compact ceramic output capacitors for high-density layouts. |
| Quiescent Current | 7 µA - extends battery runtime in always-on subsystems such as sensor hubs and security camera standby modes. |
| OCP Mode | Latch-off - provides definitive fault isolation during sustained short circuits or overvoltage events, requiring explicit reset via EN/VIN toggle. |
| Package | SOT583 (1.6 mm × 2.1 mm, 0.55 mm height) - surface-mount package optimized for automated assembly and thermal performance on 2-layer PCBs. |
Pinout & Package
The TPS628303BDRLR is housed in an 8-pin SOT583 package (1.6 mm × 2.1 mm, 0.55 mm max height) with exposed thermal pad for enhanced heat dissipation. Pin 1 is located at the bottom-left corner when viewed top-down with marking dot in upper-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Connects to main input rail (2.25–5.5 V); requires local 3 µF effective capacitance placed adjacent to pin for stability and EMI suppression. |
| GND | Ground reference | Primary return path for power stage and control circuitry; must be tied directly to thermal pad and system ground plane. |
| MODE | Operation mode control | Pulled high for forced-PWM (fixed 2 MHz, lowest ripple); pulled low for auto PSM/PWM (highest light-load efficiency); not floating. |
| FB | Feedback sensing | Connects to resistor divider from VOUT; sets output voltage with ±1% accuracy; input leakage <70 nA minimizes divider error. |
| VOS | Output voltage sense | Direct connection point post-inductor for accurate remote sensing; rejects PCB trace IR drop in high-current paths. |
| PG | Power-good indicator | Open-drain output asserting high when VOUT is within 90–110% of target; requires external pullup ≤5.5 V for rail sequencing. |
| SW | Power switch node | Drives external inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI and ringing. |
| EN | Enable control | Active-high logic input (VIH = 0.8 V); 100 nA shutdown current enables ultra-low-power system-level control. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers fast transient response with <10 µs recovery time and stable operation using only 12–200 µF output capacitance. |
| Integrated noise-filtering capacitors | On-die decoupling reduces high-frequency switching noise >450 MHz, easing CISPR 11/32 Class B radiated emissions compliance. |
| 100% duty-cycle operation | Enables dropout as low as IOUT × RDS(on_HS) + IOUT × DCR_L, extending usable battery voltage range in portable applications. |
| Active output discharge | Discharges VOUT through SW pin during shutdown (75–400 mA sink), preventing unintended back-powering of upstream circuitry. |
| Latch-off OCP/OVP protection | Locks both FETs off upon sustained fault (32 cycles), eliminating thermal runaway risk and simplifying system-level fault management. |
Applications
| ASIC, SoC, and MCU Supply | Analog Security and IP Network Cameras |
|---|---|
Use Scenario: Powering 1.2 V core rails of Xilinx Zynq SoCs or NXP i.MX RT1170 MCUs in edge AI gateways with burst-mode processing loads. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 3-A peak current with <1% output deviation during 100 ns load steps. Use Value: Maintains digital logic integrity under rapid current transients while minimizing board area via 2.0 MHz switching and compact SOT583 footprint. | Use Scenario: Dual-rail supply for image sensor (1.8 V) and ISP processor (1.1 V) in outdoor PTZ cameras operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Adjustable-output buck converter providing precise, temperature-stable voltage with latch-off protection against ESD-induced overvoltage on long coaxial video lines. Use Value: Ensures uninterrupted imaging during lightning-induced surges by latching off instead of hiccupping, preventing frame corruption or firmware lockup. |
| Industrial PC | Factory Automation and Control |
Use Scenario: Generating 3.3 V for PCIe interface and 1.8 V for DDR memory termination in fanless DIN-rail IPCs with limited airflow. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC/DC converter with 110.9°C/W junction-to-ambient resistance in SOT583 package. Use Value: Sustains full 3-A output at 75°C ambient without derating, eliminating need for heatsinks or forced cooling in sealed enclosures. | Use Scenario: Powering EtherCAT slave controllers and IO-Link transceivers in modular PLC backplanes subject to 24 V DC bus transients. IC Role / Device Role / Timing Role: Input-filter tolerant buck regulator accepting 2.25–5.5 V with UVLO hysteresis (120 mV) and active discharge for safe hot-swap insertion. Use Value: Prevents brownout resets during field wiring faults and enables controlled power-down of distributed nodes without bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628303ARZER | Same 3-A rating and DCS-Control, but WQFN-RZE (1.0 mm × 2.0 mm) package and hiccup OCP instead of latch-off. | Preferred where board space is more constrained than fault-recovery timing; hiccup allows autonomous recovery after brief shorts. | Select TPS628303ARZER if automatic fault recovery is required and layout allows smaller WQFN footprint. |
| TPS62864DRLR | 4-A rating, same SOT583 package, but fixed 0.6 V output and no VOS pin; uses different control loop with lower IQ (2.5 µA). | Used in GPU core supplies where fixed low-voltage and ultra-low quiescent current outweigh adjustability and remote sensing needs. | Select TPS62864DRLR only for fixed 0.6 V applications demanding sub-3 µA IQ; not suitable for adjustable or precision-sensing designs. |
Compared with TPS628303ARZER and TPS62864DRLR, the TPS628303BDRLR uniquely combines 3-A adjustability, VOS remote sensing, and latch-off OCP/OVP in the manufacturable SOT583 package-making it optimal for industrial systems where deterministic fault isolation and output voltage flexibility are mandatory.
Availability
TPS628303BDRLR is available at Aetrix Electronics and suitable for ASIC/SoC power delivery, industrial PC motherboard design, and factory automation controller development requiring stable component supply and long-term production continuity.
Supply support for TPS628303BDRLR 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 company headquartered in Dallas, Texas, designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and communications markets.
The TPS62830x product line delivers high-efficiency, low-quiescent-current step-down converters targeting space- and thermal-constrained embedded systems requiring precise, reliable point-of-load regulation with advanced EMI and fault protection features.
FAQ
What is the maximum output current supported by the TPS628303BDRLR?
The TPS628303BDRLR is rated for 3 A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 2.25 V to 5.5 V). Its 35 mΩ high-side and 18 mΩ low-side MOSFETs enable this rating in the SOT583 package with appropriate PCB copper area and airflow. Derating applies above 75°C ambient per thermal metrics in the datasheet.
Does the TPS628303BDRLR support adjustable output voltage?
Yes, the TPS628303BDRLR supports adjustable output voltage from 0.5 V to 4.5 V using an external resistor divider connected to the FB pin. Its ±1% feedback voltage accuracy (495–505 mV) over –40°C to 125°C ensures stable regulation across temperature, making it suitable for precision SoC core supplies.
How does the latch-off OCP/OVP protection work in the TPS628303BDRLR?
When the TPS628303BDRLR detects 32 consecutive high-side current-limit events (≈16 µs), it latches off both MOSFETs and de-asserts PG. Recovery requires cycling EN or VIN-no automatic restart. This differs from hiccup-mode variants and prevents thermal stress during persistent faults like solder shorts or damaged downstream circuitry.
Can the TPS628303BDRLR operate with a prebiased output?
Yes, the TPS628303BDRLR supports start-up into a prebiased output voltage. During first enable, it disables active output discharge to avoid sinking current from an already-charged rail. Subsequent enables require a power cycle to re-enable discharge. This behavior is confirmed in Section 7.3.3 of the official datasheet.
What is the purpose of the VOS pin on the TPS628303BDRLR?
The VOS (Voltage Output Sense) pin on the TPS628303BDRLR provides Kelvin sensing of the output voltage directly at the load side of the inductor. It compensates for IR drop across PCB traces and inductor DCR, enabling accurate regulation under high-current dynamic loads-critical for SoC and FPGA core supplies where voltage tolerance is ±25 mV or tighter.
TPS628303BDRLR 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:
- 3A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
TPS628303BDRLR FAQ
1.How can I place an order for TPS628303BDRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628303BDRLR 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 TPS628303BDRLR reliable?
The price and inventory of TPS628303BDRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628303BDRLR is usually 5 days.
3.What payment methods are accepted for TPS628303BDRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628303BDRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628303BDRLR?
TPS628303BDRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628303BDRLR 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 TPS628303BDRLR?
For technical support, including TPS628303BDRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628303BDRLR requirements.
6.How does Aetrix verify that TPS628303BDRLR is sourced from the original manufacturer or authorized distributors?
All TPS628303BDRLR 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 TPS628303BDRLR meets industry standards.
7.What is the process for return or replacement of TPS628303BDRLR?
All TPS628303BDRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628303BDRLR, 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 TPS628303BDRLR part is unused and in its original packaging.
Return procedure for TPS628303BDRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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