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Texas Instruments TPS628301ADRLR
- Part No.:
- TPS628301ADRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-583
- Datasheet:
-
TPS628301ADRLR.pdf
- Description:
- IC REG BUCK ADJ 1A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
TPS628301ADRLR from Texas Instruments is a 1-A synchronous step-down DC/DC converter in an 8-pin SOT583 package, operating from 2.25V to 5.5V input and delivering 0.5V–4.5V adjustable output with 1% feedback voltage accuracy across –40°C to 125°C. It features DCS-Control topology, 2.0 MHz switching frequency, 7 µA quiescent current, and hiccup-mode overcurrent protection-designed for compact, high-efficiency point-of-load regulation in space-constrained portable and industrial systems.
For engineers reviewing the TPS628301ADRLR datasheet, TPS628301ADRLR pinout, TPS628301ADRLR application, or TPS628301ADRLR equivalent, key selection criteria include its 1-A output capability, SOT583 footprint compatibility, 1% VFB accuracy over temperature, active output discharge, power-good signaling, and EMI-optimized design supporting CISPR 11/32 compliance.
Technical Context
The TPS628301ADRLR 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 internal 35 mΩ high-side and 18 mΩ low-side MOSFETs support high efficiency at light and full loads, while the MODE pin selects between power-save mode (for ultra-low IQ) and forced-PWM mode (for minimal ripple and fixed frequency).
It integrates a fast comparator for improved transient response, on-chip noise-filtering capacitors for EMI reduction, and a 300 µs internal soft-start. Protection includes thermal shutdown (150°C trip), UVLO (2.25 V rising threshold), hiccup OCP, and active output discharge-enabling robust operation in battery-powered and thermally demanding environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25 V to 5.5 V - supports single-cell Li-ion, USB, and wide-input industrial rails without external pre-regulation. |
| Output Current | 1 A continuous - sufficient for powering ASIC cores, MCU I/O domains, or camera sensor subsystems. |
| Feedback Accuracy | ±1% over –40°C to 125°C - ensures stable output regulation under extreme thermal conditions without calibration. |
| Quiescent Current | 7 µA - extends battery runtime in always-on or low-duty-cycle portable applications. |
| Switching Frequency | 2.0 MHz - enables use of sub-1 µH inductors and small ceramic capacitors for ultra-compact PCB layouts. |
| Package | SOT583 (1.6 mm × 2.1 mm, 0.55 mm height) - surface-mount, leaded package with exposed pad for thermal performance and manufacturability. |
| OCP Behavior | Hiccup mode - automatically recovers after overload removal, avoiding manual reset in field-deployed systems. |
Pinout & Package
The TPS628301ADRLR uses an 8-pin SOT583 package (DRL) with 0.4 mm pitch, 1.6 mm × 2.1 mm body, and exposed thermal pad. Pin 1 is VIN; pin 2 is GND; pin 3 is MODE; pin 4 is FB; pin 5 is VOS; pin 6 is PG; pin 7 is SW; pin 8 is EN. The package supports reflow soldering and provides thermal resistance RθJA = 110.9°C/W (JEDEC) and RθJB = 22.2°C/W (JEDEC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.25–5.5 V supply; requires local 3 µF effective input capacitance placed adjacent to minimize loop inductance. |
| GND (Pin 2) | Ground reference | Primary return path for power and control circuits; must be connected to low-impedance ground plane under exposed pad. |
| MODE (Pin 3) | Operation mode control | Pull low for PSM/PWM auto-switching (low-IQ); pull high for forced-PWM (fixed 2 MHz, lowest ripple); do not float. |
| FB (Pin 4) | Feedback input | Connects to resistor divider from VOUT; sets output voltage via VFB = 500 mV ±1%; leakage <70 nA ensures accuracy. |
| VOS (Pin 5) | Output voltage sense | Direct connection to post-inductor node improves load regulation and transient response by eliminating PCB trace IR drop. |
| PG (Pin 6) | Power-good open-drain | Signals valid regulation (high-Z when VFB within 94–98% window); requires external pullup ≤5.5 V; 128 µs startup delay. |
| SW (Pin 7) | Power switch node | Drives external inductor; connects to internal HS/LS FETs; requires tight layout to minimize EMI and ringing. |
| EN (Pin 8) | Enable input | Active-high logic (0.8 V threshold); 100 nA shutdown current; enables sequencing and system-level power control. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers fast transient response with minimal output capacitance (as low as 12 µF effective), reducing BOM cost and board area. |
| Integrated noise-filtering capacitors | Reduces high-frequency EMI emissions above 450 MHz, simplifying CISPR 11/32 radiated emission compliance without external filters. |
| 100% duty cycle operation | Enables dropout as low as RDS(on) × IOUT + IOUT × DCRL, extending usable battery range in single-cell Li-ion systems. |
| Active output discharge | Discharges VOUT through SW pin during shutdown (75–400 mA sink), preventing floating outputs and ensuring safe power sequencing. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and resumes only after cooling by ≥20°C, preventing thermal runaway in enclosed enclosures. |
Applications
| Solid State Drive (SSD) Power | Portable Electronics |
|---|---|
Use Scenario: Regulating 1.2 V or 1.8 V core voltage for NAND flash controllers and DRAM buffers in M.2 and U.2 SSD modules. IC Role / Device Role: Primary point-of-load converter delivering tightly regulated, low-noise 1-A output with fast transient response to handle burst read/write loads. Use Value: 1% VFB accuracy and DCS-Control ensure stable memory interface timing; SOT583 footprint saves space on dense SSD PCBs. | Use Scenario: Supplying 3.3 V I/O rail or 1.2 V processor core in handheld medical monitors, barcode scanners, and ruggedized tablets. IC Role / Device Role: High-efficiency buck regulator operating from single-cell Li-ion (3.0–4.2 V), supporting both active and standby modes. Use Value: 7 µA quiescent current extends battery life in sleep states; hiccup OCP prevents thermal damage during accidental short-circuits. |
| Analog Security Cameras | Industrial PC Power |
Use Scenario: Generating clean 1.8 V or 2.5 V for CMOS image sensors and ISP processors in IP-based security cameras deployed outdoors. IC Role / Device Role: Low-EMI, thermally robust DC/DC converter powering noise-sensitive analog front-end circuitry. Use Value: On-chip EMI filtering and 2.0 MHz switching enable compliance with EN 55024 without added ferrites; –40°C to 125°C rating suits unheated enclosures. | Use Scenario: Providing 1.0 V–1.8 V core voltage for Intel Atom or ARM-based industrial PCs used in factory automation panels. IC Role / Device Role: Compact, reliable POL regulator with power-good signaling for system-level rail sequencing and fault monitoring. Use Value: PG output enables safe startup/shutdown coordination with FPGA or microcontroller; SOT583 allows placement near SoC for optimal decoupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628301ARZER | Same 1-A rating, 1% VFB, and DCS-Control, but in 1.0 mm × 2.0 mm WQFN (RZE) package with higher thermal density (RθJA = 105.7°C/W vs. 110.9°C/W). | Preferred where PCB area is more constrained than assembly process; requires fine-pitch reflow and thermal via design. | Select TPS628301ARZER for maximum power density; choose TPS628301ADRLR for easier manufacturability and thermal margin in moderate-power industrial designs. |
| TPS628601RTER | 1-A buck with 1.8 V fixed output, 1.8 MHz switching, and 1.5% accuracy (vs. adjustable 0.5–4.5 V and 1% accuracy); no VOS pin or active discharge. | Suitable for fixed-voltage applications without sequencing or precision sensing needs; lacks VOS and PG functionality. | Choose TPS628301ADRLR when adjustable output, output voltage sensing, or power-good signaling is required; use TPS628601RTER only for simple, cost-sensitive fixed-rail use cases. |
Compared with TPS628301ARZER, the TPS628301ADRLR trades minor thermal resistance for superior manufacturability and lower assembly risk; versus TPS628601RTER, it delivers higher accuracy, flexibility, and system-level control features essential for demanding embedded applications.
Availability
TPS628301ADRLR is available at Aetrix Electronics and suitable for solid state drive power, portable electronics, analog security cameras, and industrial PC applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS628301ADRLR 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 space-constrained, high-efficiency point-of-load applications in portable, industrial, and imaging systems-emphasizing low IQ, EMI robustness, and thermal resilience.
FAQ
What is the maximum output current supported by the TPS628301ADRLR?
The TPS628301ADRLR is rated for 1 A continuous output current under recommended operating conditions (TJ ≤ 125°C). Its hiccup-mode overcurrent protection triggers at approximately 2.1 A peak high-side current, allowing brief surge handling while maintaining thermal safety. Derating is advised above 85°C ambient or with limited airflow.
Does the TPS628301ADRLR support adjustable output voltage?
Yes, the TPS628301ADRLR supports fully adjustable output voltage from 0.5 V to 4.5 V using an external resistor divider connected to the FB pin. The internal 500 mV reference achieves ±1% accuracy across –40°C to 125°C, making it suitable for precise core and I/O rail generation in mixed-signal systems.
How does the MODE pin affect operation of the TPS628301ADRLR?
The MODE pin on the TPS628301ADRLR selects between two operating modes: pulled low enables automatic PSM/PWM transition for highest light-load efficiency (7 µA IQ), while pulled high forces continuous PWM mode at 2.0 MHz for minimal output ripple and predictable frequency-critical for noise-sensitive analog circuits.
What thermal performance can be expected from the TPS628301ADRLR in a standard PCB layout?
In a JEDEC-standard 2-layer board with 2 oz copper and thermal vias under the exposed pad, the TPS628301ADRLR exhibits RθJA = 110.9°C/W and RθJB = 22.2°C/W. At 1 A load and 5 V input, typical junction rise is ~25°C above ambient-well within the 125°C max operating limit, even in sealed enclosures without forced air.
Is active output discharge implemented in the TPS628301ADRLR, and how does it function?
Yes, the TPS628301ADRLR includes active output discharge. When EN is pulled low, the device sinks 75–400 mA through the SW pin to rapidly discharge the output capacitor, preventing floating voltages and enabling safe power sequencing. This feature requires VIN to remain present during discharge and eliminates need for external discharge circuitry.
TPS628301ADRLR 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:
- 1A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
TPS628301ADRLR FAQ
1.How can I place an order for TPS628301ADRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628301ADRLR 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 TPS628301ADRLR reliable?
The price and inventory of TPS628301ADRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628301ADRLR is usually 5 days.
3.What payment methods are accepted for TPS628301ADRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628301ADRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628301ADRLR?
TPS628301ADRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628301ADRLR 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 TPS628301ADRLR?
For technical support, including TPS628301ADRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628301ADRLR requirements.
6.How does Aetrix verify that TPS628301ADRLR is sourced from the original manufacturer or authorized distributors?
All TPS628301ADRLR 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 TPS628301ADRLR meets industry standards.
7.What is the process for return or replacement of TPS628301ADRLR?
All TPS628301ADRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628301ADRLR, 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 TPS628301ADRLR part is unused and in its original packaging.
Return procedure for TPS628301ADRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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