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Texas Instruments TPS628303ARZER
- Part No.:
- TPS628303ARZER
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN
- Datasheet:
-
TPS628303ARZER.pdf
- Description:
- IC REG BUCK ADJ 3A 8WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,778
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Product details
Overview
TPS628303ARZER from Texas Instruments is a 3A synchronous step-down DC/DC converter in a 1.0mm × 2.0mm WQFN package, supporting 2.25V–5.5V input and 0.5V–4.5V adjustable output with 1% FB voltage accuracy across –40°C to 125°C. It features DCS-Control topology, 2.0MHz switching frequency, 7µA quiescent current, and hiccup-mode overcurrent protection-designed for high-efficiency point-of-load regulation in space-constrained industrial and portable systems.
For engineers reviewing the TPS628303ARZER datasheet, TPS628303ARZER pinout, TPS628303ARZER application, or TPS628303ARZER equivalent, key selection considerations include its 3A output capability, WQFN-RZE package footprint, MODE-pin controllable PSM/PWM operation, active output discharge, and integrated power-good signal with ±1% output accuracy over full temperature range.
Technical Context
The TPS628303ARZER implements DCS-Control architecture with adaptive constant-on-time modulation, enabling seamless transition between PWM (2MHz fixed) and PFM modes based on load. Its fast comparator enables improved transient response with minimal output capacitance.
It integrates dual MOSFETs (35mΩ HS / 18mΩ LS), on-chip noise-filtering capacitors for CISPR 11/32 compliance, and a dedicated VOS pin for accurate remote output sensing-ensuring stable regulation under dynamic load steps and low-noise EMI performance without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous-supports ASIC/SoC core rails requiring stable mid-range current delivery without thermal derating at TJ ≤ 125°C. |
| Input Voltage Range | 2.25V to 5.5V-compatible with single-cell Li-ion, USB PD, and 3.3V/5V intermediate bus architectures. |
| Feedback Accuracy | ±1% over –40°C to 125°C-enables precise 0.5V–4.5V output setting for sensitive analog or digital loads. |
| Quiescent Current | 7µA-extends battery runtime in always-on portable electronics during light-load standby. |
| Switching Frequency | 2.0MHz nominal-allows use of sub-1µH inductors and compact ceramic output capacitors for high-density PCB layouts. |
| OCP Mode | Hiccup protection-automatically recovers after short-circuit removal without host intervention or power cycling. |
| Soft-Start Time | 300µs-controls inrush current during power-up to prevent input rail droop or brownout in shared supply systems. |
Pinout & Package
TPS628303ARZER uses the RZE package: 8-pin, 1.0mm × 2.0mm WQFN-HR with wettable flanks, optimized for thermal performance (RθJA = 105.7°C/W JEDEC) and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.25V–5.5V; requires local 3µF effective input capacitance placed adjacent to minimize high-frequency loop inductance. |
| GND | Ground reference | Primary return path for power and control circuits; must be connected to low-impedance thermal pad under package. |
| MODE | Operation mode control | Pull low for auto PSM/PWM; pull high for forced-PWM-enables ripple-sensitive applications without efficiency penalty at medium loads. |
| FB | Feedback input | Monitors resistive divider output; 500mV internal reference enables 0.5V–4.5V regulation with ±1% accuracy. |
| VOS | Remote output sense | Connects directly post-inductor to reject PCB trace IR drop-critical for maintaining accuracy under high-current load transients. |
| PG | Power-good open-drain | Signals valid regulation (94–98% VOUT window); requires external pullup ≤ 5.5V for rail sequencing or system enable logic. |
| SW | Power switch node | Drives external inductor; supports active output discharge when EN is low-prevents floating output during shutdown. |
| EN | Enable input | Logic-compatible (0.35V/0.8V thresholds); 100nA shutdown current enables ultra-low-power system-level control. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers <10µs transient response to 1A load steps with only 20µF total output capacitance-reducing BOM count and board area. |
| Integrated EMI filtering | On-die decoupling capacitors suppress >450MHz noise emissions, enabling CISPR 11 Class A/B compliance without added ferrites or shielding. |
| 100% duty-cycle operation | Maintains regulation down to VIN − VOUT ≈ 35mΩ × IOUT + inductor DCR-maximizes usable battery voltage range in portable designs. |
| Active output discharge | Discharges output via SW pin sink (75–400mA) when EN is low-eliminates need for external bleed resistor in safety-critical or fast-reboot systems. |
| Thermal shutdown with hysteresis | Shuts down at 150°C (typ), restarts at 130°C-protects against sustained overload while avoiding thermal oscillation during intermittent stress. |
Applications
| Solid State Drive Power | Industrial PC Core Rail |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM interface in M.2 NVMe SSDs with tight thermal and size constraints. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V point-of-load regulator delivering 3A peak current with <50mV undershoot during 2A/µs load transients. Use Value: DCS-Control + 2MHz switching enables <1000µF total output capacitance, reducing solution volume by 35% vs legacy 500kHz converters. | Use Scenario: Supplies FPGA or SoC core voltage in fanless industrial PCs operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Main 0.85V–1.1V adjustable rail with remote sensing (VOS) to compensate for 50mV IR drop across 4-layer PCB power planes. Use Value: ±1% FB accuracy and hiccup OCP ensure reliable boot and runtime stability despite wide temperature swings and unregulated 5V input bus. |
| Analog Security Camera | Factory Automation Controller |
Use Scenario: Powers image sensor and ISP in IP cameras powered by PoE+ (57V converted to 5V intermediate bus). IC Role / Device Role / Timing Role: Secondary 3.3V/1.2V regulator with forced-PWM mode (MODE = HIGH) to minimize EMI coupling into analog video signal chain. Use Value: Integrated EMI filters and controlled SW edge rates eliminate need for external common-mode chokes-reducing BOM cost and layout complexity. | Use Scenario: Supplies real-time microcontroller and isolated I/O drivers in PLC modules requiring long-term reliability and EMC robustness. IC Role / Device Role / Timing Role: 3.3V system rail with PG output sequenced to enable communication ICs only after stable voltage is confirmed. Use Value: Open-drain PG with 40µs deglitching prevents false resets during brief line disturbances-meeting IEC 61000-4-4 Level 3 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628303ADRLR | Same 3A rating and electrical specs, but in 2.1mm × 1.6mm SOT583 package with different pinout (MODE/FB swapped) and higher RθJA (110.9°C/W). | Preferred for hand-soldering or reflow processes where WQFN handling is challenging; lower power density but easier assembly verification. | Select when board assembly constraints outweigh thermal or size optimization needs-no PCB redesign required if layout accommodates SOT583 footprint. |
| TPS62863ARZER | Pin-compatible 3A variant with latch-off OCP instead of hiccup, 880µs soft-start, and identical RZE package-requires EN/VIN cycling to recover from fault. | Suitable for systems where short-circuit events must halt operation until explicit reset (e.g., safety interlock circuits), not automatic recovery. | Choose only when latch-off behavior is explicitly required; not drop-in-verify fault-handling logic compatibility before substitution. |
Compared with TPS628303ADRLR, the TPS628303ARZER offers superior thermal performance and smaller footprint, while TPS62863ARZER trades hiccup recovery for deterministic fault lockout-making the original TPS628303ARZER optimal for self-healing, high-availability embedded systems.
Availability
TPS628303ARZER is available at Aetrix Electronics and suitable for solid state drives, industrial PCs, analog security cameras, and factory automation controllers requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS628303ARZER 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 specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The TPS62830x product line delivers high-efficiency, low-quiescent-current step-down converters targeting space-constrained, thermally demanding applications such as portable electronics and industrial edge devices.
FAQ
What is the maximum output current capability of the TPS628303ARZER?
The TPS628303ARZER is rated for 3A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 2.25V–5.5V). Its 35mΩ high-side and 18mΩ low-side MOSFETs enable this rating in the 1.0mm × 2.0mm WQFN package with proper PCB thermal design-verified per JEDEC JESD51-7 standards.
Does the TPS628303ARZER support adjustable output voltage?
Yes, the TPS628303ARZER supports adjustable output voltage from 0.5V to 4.5V using an external resistor divider connected to the FB pin. Its internal 500mV reference and ±1% feedback accuracy over –40°C to 125°C ensure precise regulation across temperature and line variations-no fixed-output variants are offered in the ARZER suffix.
How does the MODE pin affect operation of the TPS628303ARZER?
The MODE pin on the TPS628303ARZER selects between power-save mode (PSM/PWM auto-transition, MODE = LOW) and forced-PWM mode (continuous 2MHz switching, MODE = HIGH). This allows designers to prioritize efficiency at light loads or minimize output ripple and EMI in noise-sensitive applications-both modes are fully operational across the full 3A load range.
What protection features are included in the TPS628303ARZER?
The TPS628303ARZER integrates hiccup-mode overcurrent protection (OCP), thermal shutdown with 20°C hysteresis, undervoltage lockout (UVLO), active output discharge, and power-good monitoring. It does not include overvoltage latch-off-the TPS628303BDRLR variant provides that feature, but TPS628303ARZER relies on hiccup recovery for sustained fault conditions.
Is the TPS628303ARZER compatible with prebiased start-up?
Yes, the TPS628303ARZER supports start-up into a prebiased output voltage. When enabled, it avoids reverse current flow by controlling the low-side FET during initial ramp-enabling safe power sequencing in multi-rail systems. Active output discharge is disabled during first power-on to preserve prebias; subsequent EN toggles re-enable discharge.
TPS628303ARZER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN
- 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:
- 8-WQFN-HR (1x2)
TPS628303ARZER FAQ
1.How can I place an order for TPS628303ARZER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628303ARZER 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 TPS628303ARZER reliable?
The price and inventory of TPS628303ARZER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628303ARZER is usually 5 days.
3.What payment methods are accepted for TPS628303ARZER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628303ARZER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628303ARZER?
TPS628303ARZER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628303ARZER 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 TPS628303ARZER?
For technical support, including TPS628303ARZER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628303ARZER requirements.
6.How does Aetrix verify that TPS628303ARZER is sourced from the original manufacturer or authorized distributors?
All TPS628303ARZER 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 TPS628303ARZER meets industry standards.
7.What is the process for return or replacement of TPS628303ARZER?
All TPS628303ARZER units undergo pre-shipment inspection (PSI). If there is an issue with TPS628303ARZER, 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 TPS628303ARZER part is unused and in its original packaging.
Return procedure for TPS628303ARZER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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