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Texas Instruments TPS628502DRLR
- Part No.:
- TPS628502DRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-583
- Datasheet:
-
TPS628502DRLR.pdf
- Description:
- IC REG BUCK ADJ 2A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:3,132
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Product details
Overview
TPS628502DRLR from Texas Instruments is a 2A continuous, synchronous step-down DC/DC converter in an 8-pin SOT583 package, operating from 2.7V to 6V input and delivering adjustable output voltage from 0.6V to 5.5V with 1% feedback accuracy over –40°C to +150°C junction temperature. It supports externally adjustable 1.8–4MHz switching frequency, forced PWM or automatic PWM/PFM operation, and features active output discharge, power-good output, and precise enable for sequencing.
For engineers reviewing the TPS628502DRLR datasheet, TPS628502DRLR pinout, TPS628502DRLR application, or TPS628502DRLR equivalent, key selection considerations include its 2A continuous current rating at 105°C, 17µA quiescent current in light-load PFM mode, 100% duty-cycle capability, thermal shutdown at 170°C, and compatibility with low-ESR ceramic output capacitors down to 10µF for ≥1V outputs.
Technical Context
The TPS628502DRLR implements peak current mode control with internal compensation selectable via the COMP/FSET pin-either by resistor value (for dual compensation settings) or logic level (GND/VIN tie). Its control loop supports stable operation across wide output capacitance ranges (10–200µF), enabling fast transient response without feedforward capacitor (though 10pF improves it).
It integrates high-side (65–120mΩ) and low-side (33–70mΩ) MOSFETs, supports external synchronization on MODE/SYNC with ≤50µs lock time, and provides programmable undervoltage lockout via EN pin divider. Power-good uses a window comparator with ±5% threshold hysteresis relative to VFB, and thermal protection includes 170°C shutdown with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 6V - supports single-cell Li-ion, USB PD, and industrial 3.3V/5V rails without pre-regulation. |
| Continuous Output Current | 2A at TJ ≤ 105°C - delivers full rated load in compact SOT583 without derating under typical PCB thermal conditions. |
| Feedback Voltage Accuracy | ±1% over –40°C to +150°C - ensures tight regulation for FPGA core supplies and precision analog rails. |
| Quiescent Current | 17µA typical in PFM mode - enables >10-year battery life in always-on IoT sensor nodes. |
| Switching Frequency Range | 1.8MHz to 4MHz (adjustable or sync-capable) - allows EMI-sensitive designs to shift noise above AM band and avoid critical harmonics. |
| Thermal Shutdown Threshold | 170°C with 15°C hysteresis - protects against sustained overload while permitting short-term 3A peak bursts per family spec. |
| Power-Good Accuracy | ±5% window around VFB - provides reliable system reset signaling without external comparators. |
Pinout & Package
The TPS628502DRLR is housed in an 8-pin SOT583 package measuring 1.60mm × 2.10mm, optimized for high-density PCB layouts and thermally efficient mounting on small-area ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.7–6V supply; requires local 10µF ceramic capacitor to minimize input ripple and ESR-related losses. |
| SW | Switch node | Connects to external 0.47µH inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI. |
| GND | Ground reference | Primary return path for power and control circuits; ties to thermal pad for optimal heat dissipation. |
| EN | Enable control | Logic-compatible input with 1.1V rising threshold; enables precise UVLO and power sequencing via resistor divider. |
| PG | Power-good indicator | Open-drain output requiring external pull-up; asserts low during startup, fault, or out-of-regulation conditions. |
| FB | Feedback input | Monitors resistive divider output; sets VOUT = 0.6V × (1 + R1/R2); leakage <70nA avoids accuracy degradation. |
| COMP/FSET | Compensation & frequency set | Configures control-loop compensation and switching frequency (1.8–4MHz) via resistor to GND or direct tie to GND/VIN. |
| MODE/SYNC | Mode control / clock sync | Low = auto PWM/PFM; high = forced PWM; also accepts 1.8–4MHz external clock for synchronized multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable 1.8–4MHz switching frequency | Enables EMI optimization and inductor size reduction while maintaining stability across 10–200µF output capacitance. |
| 1% VFB accuracy over full temperature range | Guarantees ±18mV error at 1.8V output, eliminating need for post-regulation LDOs in processor core supplies. |
| Active output discharge | Discharges VOUT through 100Ω internal path when disabled, preventing floating rail issues in hot-swap or sequencing-critical systems. |
| Precise ENABLE with user-defined UVLO | Allows custom input voltage turn-on/turn-off thresholds using external resistor divider, supporting multi-rail power sequencing. |
| Power-good with window comparator | Provides fail-safe system reset signaling with built-in hysteresis, removing need for discrete supervisor ICs. |
Applications
| Motor Drives | Factory Automation |
|---|---|
Use Scenario: Powering gate drivers and position sensors in BLDC motor control modules within compact servo drives. IC Role / Device Role / Timing Role: Primary POL regulator converting 5V bus to 3.3V/1.8V for MCU, encoder interface, and isolated gate driver bias rails. Use Value: 2A continuous current supports burst-mode torque control; 17µA quiescent current extends standby battery life in portable tools. | Use Scenario: Supplying I/O modules, PLC fieldbus transceivers, and real-time Ethernet PHYs in modular control cabinets. IC Role / Device Role / Timing Role: Point-of-load converter delivering stable 1.2V/3.3V from 24V intermediate bus via buck-boost front-end. Use Value: 1.8–4MHz frequency adjustability avoids interference with EtherCAT or PROFINET clock domains; PG output enables deterministic boot sequencing. |
| Building Automation | Test and Measurement |
Use Scenario: Powering wireless sensor nodes (Zigbee, Matter) and HVAC controller microcontrollers in energy-efficient smart thermostats. IC Role / Device Role / Timing Role: Main system regulator converting coin-cell or energy-harvested source to regulated 1.8V/3.3V for ultra-low-power SoC and RF transceiver. Use Value: 17µA IQ and automatic PFM mode sustain >5-year operation on CR2032; 100% duty cycle supports brownout operation down to 0.6V VIN. | Use Scenario: Providing clean, low-noise bias for ADC reference buffers, op-amp signal chains, and FPGA configuration in portable DMMs and oscilloscopes. IC Role / Device Role / Timing Role: Low-noise POL regulator with spread-spectrum option, decoupled via ferrite bead and LC filter from sensitive analog sections. Use Value: ±1% VFB accuracy ensures <±1 LSB error in 16-bit ADC references; SYNC pin enables phase-aligned clocks across multiple rails to suppress beat frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628501DRLR | 1A continuous output current; identical pinout, package, and feature set except lower current rating and different current limit threshold (2.1–3.0A vs 2.85–3.9A). | Suitable for lower-power MCU cores or peripherals where 2A headroom is unnecessary; same layout reuse possible. | Select when system peak load remains below 1A and thermal margin is sufficient; retains all control features and footprint compatibility. |
| TPS62933RTER | 3A continuous output, 2.7–6V input, but uses 12-pin 2mm × 2mm WQFN; includes integrated inductor option (TPS62933RTWR) and higher 92% efficiency at 1A. | Better suited for space-constrained designs needing higher current or integrated magnetics; no pin compatibility. | Choose when board area permits larger package or when integrated inductor simplifies layout; not drop-in but functionally overlapping for 3A use cases. |
Compared with TPS628501DRLR, the TPS628502DRLR provides 100% higher continuous current in identical SOT583 footprint, enabling single-rail consolidation. Against TPS62933RTER, it trades higher integration for smaller size and proven thermal performance in ultra-dense layouts-critical for fanless industrial edge nodes.
Availability
TPS628502DRLR is available at Aetrix Electronics and suitable for motor drives, factory automation, and building automation systems requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.
Supply support for TPS628502DRLR 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-efficiency DC/DC conversion.
The TPS62850x product line was designed specifically for space-constrained, thermally demanding industrial and automation applications requiring high-current density, wide input range, and robust functional safety support.
FAQ
What is the maximum continuous output current supported by the TPS628502DRLR?
The TPS628502DRLR supports 2A continuous output current at junction temperature ≤105°C, as specified in the device comparison table and electrical characteristics. At 85°C junction temperature, it can deliver up to 3A peak current. Derating is required above 105°C per thermal resistance data (RθJA = 110°C/W on JEDEC board), and layout-dependent thermal performance must be validated for actual application conditions. The TPS628502DRLR achieves this with integrated 65mΩ high-side and 33mΩ low-side MOSFETs.
Does the TPS628502DRLR support external clock synchronization?
Yes, the TPS628502DRLR supports external clock synchronization via the MODE/SYNC pin, accepting TTL/CMOS-compatible signals from 1.8MHz to 4MHz. The internal PLL locks to the external clock within 50µs, and synchronization occurs on the falling edge of the applied clock relative to the rising edge of the SW pin-enabling 180° phase shift for interleaved multi-phase designs. This capability is confirmed in Section 5 (Pin Functions) and Section 6.5 (Electrical Characteristics) of the datasheet.
What is the purpose of the COMP/FSET pin on the TPS628502DRLR?
The COMP/FSET pin on the TPS628502DRLR serves three functions: (1) sets internal compensation for stability across 10–200µF output capacitance, (2) defines switching frequency from 1.8–4MHz via resistor-to-GND, and (3) enables/disables spread spectrum clocking. Tying it to GND selects fixed 2.25MHz operation with smallest-capacitance compensation; tying to VIN selects best-transient-response mode with SSC enabled. The TPS628502DRLR's behavior is fully documented in Section 8.3.2 and Table 8-1 of the datasheet.
Can the TPS628502DRLR operate with 100% duty cycle?
Yes, the TPS628502DRLR supports 100% duty-cycle operation, allowing VOUT to approach VIN without dropout-critical for brownout recovery in battery-powered systems. This is explicitly stated in the "Features" section and enabled by its synchronous architecture and control logic. During 100% duty cycle, the high-side FET remains continuously on and the low-side FET is off; regulation resumes normally once VIN rises sufficiently above VOUT to allow switching. The TPS628502DRLR maintains PG assertion and thermal protection even in this mode.
How does the power-good (PG) output function on the TPS628502DRLR?
The PG output on the TPS628502DRLR is an open-drain signal driven by a window comparator monitoring FB voltage. It asserts low during startup, thermal shutdown, UVLO, soft start, or when VOUT deviates by >±5% from target (e.g., 92–98% of VFB for UVP, 107–113% for OVP). Once VOUT stabilizes within regulation window, PG goes high-impedance-requiring an external pull-up. Deglitch time is 40µs for high-to-low transitions. This behavior is verified in Section 6.5 (Electrical Characteristics) and Table 8-2 of the TPS628502DRLR datasheet.
TPS628502DRLR 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):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1.8MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
TPS628502DRLR FAQ
1.How can I place an order for TPS628502DRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628502DRLR 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 TPS628502DRLR reliable?
The price and inventory of TPS628502DRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628502DRLR is usually 5 days.
3.What payment methods are accepted for TPS628502DRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628502DRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628502DRLR?
TPS628502DRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628502DRLR 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 TPS628502DRLR?
For technical support, including TPS628502DRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628502DRLR requirements.
6.How does Aetrix verify that TPS628502DRLR is sourced from the original manufacturer or authorized distributors?
All TPS628502DRLR 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 TPS628502DRLR meets industry standards.
7.What is the process for return or replacement of TPS628502DRLR?
All TPS628502DRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628502DRLR, 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 TPS628502DRLR part is unused and in its original packaging.
Return procedure for TPS628502DRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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