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Texas Instruments TPS628302ADRLR
- Part No.:
- TPS628302ADRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-583
- Datasheet:
-
TPS628302ADRLR.pdf
- Description:
- IC REG BUCK ADJ 2A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:3,475
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Product details
Overview
TPS628302ADRLR from Texas Instruments is a 2-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 uses DCS-Control topology, features 2.0 MHz switching frequency, 7 µA quiescent current, and integrated power-good output - optimized for compact, high-efficiency point-of-load regulation in portable and industrial systems.
For engineers reviewing the TPS628302ADRLR datasheet, TPS628302ADRLR pinout, TPS628302ADRLR application, or TPS628302ADRLR equivalent, key selection criteria include its 2-A output capability, SOT583 footprint compatibility, MODE pin conduction-mode control, active output discharge, and CISPR-compliant EMI performance enabled by on-chip noise-filtering capacitors.
Technical Context
The TPS628302ADRLR implements DCS-Control topology with adaptive constant-on-time modulation, enabling seamless transition between PWM (2 MHz fixed) and PFM (variable-frequency) modes based on load. Its fast comparator ensures excellent transient response even at light loads, while internal 35 mΩ/18 mΩ MOSFETs support high efficiency across input and output ranges.
It integrates a dedicated VOS pin for accurate post-inductor voltage sensing, a MODE pin for real-time selection between power-save mode (high light-load efficiency) and forced-PWM mode (low ripple, fixed frequency), and a power-good open-drain output with 94–98% rising undervoltage threshold and 30–60 µs deglitch delay.
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 without external LDO pre-regulation. |
| Output Current | 2 A continuous - delivers stable regulation under sustained 2-A load with thermal derating per RθJA = 80 °C/W (SOT583). |
| Feedback Accuracy | ±1% over –40°C to 125°C - enables precise low-voltage rail generation for ASIC/SoC cores requiring tight tolerance. |
| Switching Frequency | 2.0 MHz nominal - allows use of sub-1 µH inductors and compact ceramic output capacitors in space-constrained designs. |
| Quiescent Current | 7 µA - extends battery runtime in always-on subsystems such as security camera standby or IoT sensor nodes. |
| EMI Optimization | On-chip noise-filtering capacitors + slew-controlled gate driver - reduces high-frequency radiated emissions above 450 MHz, facilitating CISPR 11/32 Class B compliance. |
| Protection Features | Hiccup OCP, thermal shutdown (150°C), UVLO (2.15 V typ), active output discharge, and power-good monitoring - ensures robust operation in unattended embedded systems. |
Pinout & Package
TPS628302ADRLR is housed in an 8-pin SOT583 package (1.6 mm × 2.1 mm, 0.35 mm height), optimized for automated assembly and thermal performance in dense PCB layouts.
| 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 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; 500 mV reference enables 0.5–4.5 V adjustable output with ±1% accuracy. |
| VOS | Output voltage sense | Direct connection after inductor improves regulation accuracy by rejecting PCB trace IR drop. |
| PG | Power-good open drain | Signals valid output (94–98% VOUT); requires external pullup ≤5.5 V; used for rail sequencing or system reset assertion. |
| SW | Power switch node | Connects to inductor; carries high di/dt; layout must minimize parasitic inductance to reduce ringing and EMI. |
| EN | Enable input | Active-high logic (0.8 V threshold); 100 nA shutdown current enables ultra-low-power system-level control. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers fast transient response (<10 µs recovery) with minimal output capacitance (≥12 µF effective), reducing BOM cost and board area. |
| Integrated noise-filtering capacitors | Eliminates need for external high-frequency decoupling, cuts radiated EMI >450 MHz, and simplifies layout for CISPR 11/32 compliance. |
| 100% duty-cycle operation | Enables dropout as low as RDS(on) × IOUT + IOUT × DCRL, extending usable battery voltage range in portable electronics. |
| Active output discharge | Discharges output via SW pin during disable (75–400 mA sink), preventing floating voltages that could damage downstream logic or cause latch-up. |
| Thermal shutdown with 20°C hysteresis | Protects against sustained overload or poor heatsinking; automatic recovery when junction cools below 130°C avoids manual reset requirement. |
Applications
| Solid State Drive (SSD) Power | Industrial PC Core Rail |
|---|---|
Use Scenario: Supplies 1.2 V core voltage to NAND controller and DRAM in M.2 NVMe SSDs with strict size and thermal constraints. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 2-A output with fast transient response to handle burst read/write loads. Use Value: 2.0 MHz switching enables <0.5 µH inductor and small 22 µF ceramic output caps, meeting 16 mm × 20 mm SSD form factor while maintaining <±1% output deviation during 1-A step transients. | Use Scenario: Powers FPGA or SoC core in fanless industrial PCs operating continuously at ambient up to 70°C. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC/DC converter with hiccup OCP and thermal shutdown for unattended 24/7 operation. Use Value: SOT583 package's 22.2 °C/W RθJB enables full 2-A output without heatsink at 60°C ambient, and ±1% FB accuracy ensures reliable logic-level margin across temperature. |
| Analog Security Camera | Factory Automation Sensor Node |
Use Scenario: Powers image signal processor (ISP) and CMOS sensor in IP cameras powered by PoE+ (57 V stepped down to 5 V bus). IC Role / Device Role / Timing Role: Secondary buck regulator generating clean 1.8 V or 2.5 V analog/digital rails with low EMI to prevent video noise. Use Value: On-chip EMI filtering and controlled switch-node slew rate suppress radiated emissions that would otherwise corrupt HD video transmission over coax or Ethernet. | Use Scenario: Powers ultra-low-power microcontroller and wireless transceiver (BLE/Zigbee) in battery-operated predictive maintenance sensors. IC Role / Device Role / Timing Role: Always-on power supply with 7 µA IQ and active discharge, supporting multi-year battery life and safe power-down sequencing. Use Value: 7 µA quiescent current extends CR2032 battery life beyond 5 years in sleep mode, while PG output enables precise wake-up coordination with host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628302ARZER | Same 2-A rating, identical electrical specs, but in 1.0 mm × 2.0 mm WQFN (RZE) package with lower RθJA (77.6 °C/W). | Preferred for higher power density or better thermal performance; requires different PCB footprint and reflow profile. | Select when board space is critical and thermal headroom is limited; not pin-compatible with SOT583. |
| TPS62864ARZXR | 2-A, 2.7–6.5 V input, 0.6–5.5 V output, 1.8 MHz, ±0.5% FB accuracy, but no VOS pin or integrated EMI capacitors. | Better accuracy and wider input range, but lacks VOS sensing and on-chip EMI mitigation - requires more careful layout for noise-sensitive apps. | Choose when tighter output tolerance is required and EMI can be managed externally; not drop-in due to different pinout and feature set. |
Compared with TPS628302ARZER, the TPS628302ADRLR trades slightly higher thermal resistance for easier manufacturability in SOT583; versus TPS62864ARZXR, it provides superior EMI suppression and post-inductor sensing at the cost of ±1% (vs ±0.5%) FB accuracy - making it optimal for compact, noise-sensitive, thermally constrained applications where production yield and layout simplicity matter.
Availability
TPS628302ADRLR is available at Aetrix Electronics and suitable for solid state drives, industrial PCs, analog security cameras, and factory automation sensor nodes requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS628302ADRLR 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 ICs, with decades of expertise in high-reliability power conversion solutions.
The TPS62830x family was designed specifically for space-constrained, high-efficiency point-of-load applications in portable, industrial, and imaging systems - emphasizing low IQ, fast transient response, and integrated EMI reduction without external components.
FAQ
What is the maximum continuous output current of the TPS628302ADRLR?
The TPS628302ADRLR is rated for 2 A continuous output current under recommended operating conditions. This rating assumes proper PCB layout with adequate copper area for thermal dissipation, input/output capacitance per datasheet guidelines (≥3 µF CIN, ≥12 µF COUT effective), and ambient temperature ≤60°C. At higher temperatures or with reduced copper, derating applies per its 80 °C/W RθJA (EVM) value.
Does the TPS628302ADRLR support output voltage adjustment, and what is the range?
Yes, the TPS628302ADRLR supports 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 voltage enables precise setting with ±1% accuracy across –40°C to 125°C junction temperature. Fixed-output versions are not offered for this part number; only adjustable configuration is available in the ADRLR (SOT583) variant.
How does the MODE pin affect operation of the TPS628302ADRLR?
The MODE pin on the TPS628302ADRLR selects between two operating modes: pulling it low enables automatic PSM/PWM mode switching for peak efficiency across load range, while pulling it 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 toggled dynamically during operation without disruption - enabling real-time trade-off between efficiency and noise performance.
What protection features are integrated into the TPS628302ADRLR?
The TPS628302ADRLR integrates hiccup overcurrent protection (OCP), thermal shutdown (150°C trip, 20°C hysteresis), undervoltage lockout (UVLO at 2.15 V typical), active output discharge, and power-good monitoring. It does not include latch-off OCP or overvoltage protection (OVP) - those features are exclusive to the 'B' suffix variants (e.g., TPS628303BDRLR). All protections operate autonomously without external components.
Can the TPS628302ADRLR start up into a prebiased output?
Yes, the TPS628302ADRLR supports startup into a prebiased output voltage. When enabled, it initially disables active discharge and ramps the output from the prebias level using soft-start control. However, if the device has previously been enabled with active discharge active, a full power cycle (VIN or EN toggle) is required to clear the discharge state before prebias startup functions correctly - ensuring safe, controlled ramping without reverse current injection.
TPS628302ADRLR 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:
- 2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
TPS628302ADRLR FAQ
1.How can I place an order for TPS628302ADRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628302ADRLR 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 TPS628302ADRLR reliable?
The price and inventory of TPS628302ADRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628302ADRLR is usually 5 days.
3.What payment methods are accepted for TPS628302ADRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628302ADRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628302ADRLR?
TPS628302ADRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628302ADRLR 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 TPS628302ADRLR?
For technical support, including TPS628302ADRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628302ADRLR requirements.
6.How does Aetrix verify that TPS628302ADRLR is sourced from the original manufacturer or authorized distributors?
All TPS628302ADRLR 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 TPS628302ADRLR meets industry standards.
7.What is the process for return or replacement of TPS628302ADRLR?
All TPS628302ADRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628302ADRLR, 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 TPS628302ADRLR part is unused and in its original packaging.
Return procedure for TPS628302ADRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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