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Texas Instruments TPS628501DRLR
- Part No.:
- TPS628501DRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-583
- Datasheet:
-
TPS628501DRLR.pdf
- Description:
- IC REG BUCK ADJ 1A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:2,660
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Product details
Overview
TPS628501DRLR from Texas Instruments is a 1A synchronous step-down DC/DC converter in an 8-pin SOT583 package, designed for space-constrained POL applications. It operates from 2.7V to 6V input, delivers adjustable or fixed 1.8V output, achieves 1% feedback voltage accuracy over –40°C to +150°C, and supports 1.8–4MHz switching frequency with external synchronization capability.
For engineers reviewing the TPS628501DRLR datasheet, TPS628501DRLR pinout, TPS628501DRLR application, or TPS628501DRLR equivalent, key selection criteria include its 17µA quiescent current in forced-PWM mode, active output discharge, power-good window comparator, precise enable threshold (1.1V rising), and thermal shutdown at 170°C - all critical for industrial motor drives and factory automation power rails.
Technical Context
The TPS628501DRLR implements peak current mode control with internal compensation selectable via COMP/FSET pin logic or resistor value, enabling stable operation across 8–200µF output capacitance ranges. Its dual-mode operation - forced PWM (MODE/SYNC high) or auto PFM/PWM (MODE/SYNC low) - maintains >90% efficiency from 1mA to 1A load at 3.3Vout/Vin=5V.
It integrates low-RDS(on) MOSFETs (65mΩ high-side, 33mΩ low-side at VIN ≥5V), supports 100% duty-cycle operation near VIN ≈ VOUT, and features a dedicated open-drain PG output with ±3% window hysteresis referenced to VFB - ensuring reliable system-level power sequencing and fault detection.
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. |
| Output Current | 1A continuous - rated for sustained 1A at TJ ≤105°C; peak capability up to 3A for short transients. |
| Feedback Accuracy | ±1% over –40°C to +150°C - enables tight regulation for FPGA core supplies and DSP I/O rails. |
| Quiescent Current | 17µA typical in forced-PWM - minimizes standby loss in always-on industrial sensors and PLC modules. |
| Switching Frequency | 1.8–4MHz adjustable or sync-capable - allows EMI-sensitive designs to avoid AM band and align with system clocks. |
| Thermal Shutdown | 170°C trip with 15°C hysteresis - protects against sustained overload in enclosed enclosures without external thermal monitoring. |
| Power-Good Output | Open-drain window comparator (±3% VFB) - provides deterministic reset signaling for microcontrollers and FPGAs. |
Pinout & Package
TPS628501DRLR uses an 8-pin SOT583 package (1.60mm × 2.10mm), optimized for high-density PCB layouts in compact industrial and test equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6V supply; requires local 10µF ceramic capacitor to GND for stability and transient response. |
| SW (Pin 7) | Switch node | Connects to external 0.47µH inductor; carries high di/dt; layout must minimize loop area to reduce EMI. |
| GND (Pin 8) | Ground reference | Primary return path for power and control circuits; must be connected to low-impedance ground plane. |
| EN (Pin 2) | Enable control | Logic-compatible input with 1.1V rising threshold; enables programmable UVLO and precise power sequencing. |
| PG (Pin 6) | Power-good indicator | Open-drain output requiring external pull-up; asserts low during soft-start, UVLO, or thermal shutdown. |
| FB (Pin 5) | Feedback input | Monitors resistive divider output; sets VOUT = 0.6V × (1 + R1/R2); leakage <70nA ensures accuracy. |
| COMP/FSET (Pin 4) | Compensation & frequency set | Resistor-to-GND selects switching frequency (1.8–4MHz) and internal compensation for 8–200µF COUT. |
| MODE/SYNC (Pin 3) | Mode control / clock sync | Pull low for auto PFM/PWM; pull high for forced PWM; accept 1.8–4MHz external clock for synchronized multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety-Capable Documentation | TI provides FIT rate data, failure mode analysis, and safety manual - supports IEC 61508 SIL-2 system design. |
| Active Output Discharge | 100Ω internal discharge path - ensures rapid VOUT ramp-down during disable, preventing back-powering of downstream circuitry. |
| Precise Enable Threshold | 1.1V rising / 1.0V falling - enables accurate undervoltage lockout using simple resistor dividers on wide-input rails. |
| 100% Duty-Cycle Operation | Supports VOUT up to VIN − 0.3V - maintains regulation during brownout conditions in battery-powered motor controllers. |
| Spread Spectrum Clocking (SSC) | Enabled via COMP/FSET resistor - reduces peak EMI by ±288kHz dithering, easing CISPR-22 Class B compliance. |
Applications
| Motor Drive Power Rail | Factory Automation Controller |
|---|---|
Use Scenario: Powers gate drivers and position-sensing ADCs in servo motor inverters operating from 24V bus with local 3.3V/1.8V regulation. IC Role / Device Role / Timing Role: Primary POL regulator delivering clean, sequenced 1.8V to FPGA configuration banks and 3.3V to isolated communication interfaces. Use Value: 17µA IQ extends standby time in energy-conscious motion control systems; PG output coordinates safe shutdown with motor brake activation. |
Use Scenario: Supplies I/O expansion modules in PLC backplanes where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter generating 5V/1A for digital isolators and CAN transceivers from 12V intermediate rail. Use Value: SOT583 footprint saves >40% board area vs SOIC-8; 110°C/W θJA enables convection-only cooling in sealed DIN-rail enclosures. |
| Building Automation Sensor Node | Test & Measurement Front-End |
Use Scenario: Powers ultra-low-power environmental sensors (CO₂, humidity) and BLE radios in battery-operated HVAC nodes. IC Role / Device Role / Timing Role: Always-on buck regulator maintaining 3.3V output while supporting deep-sleep modes with minimal quiescent draw. Use Value: 17µA IQ enables >5-year battery life on two AA cells; PFM mode sustains >85% efficiency down to 100µA load. |
Use Scenario: Generates precision 1.2V analog supply for high-speed ADCs and DACs in portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Low-noise, low-drift POL source with 1% VFB accuracy and fast load transient response (<10µs). Use Value: Internal peak-current-mode control + 0.47µH inductor yields <15mV undershoot under 1A step load; PG confirms rail readiness before sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628502DRLR | 2A continuous output current; identical pinout and feature set. | Required when load exceeds 1A or transient peaks exceed 3A. | Select TPS628502DRLR only if higher current headroom is needed - same layout, no redesign required. |
| TPS62933RTER | 3A output, 2.7–6.5V input, 15µA IQ, but uses 10-pin 2.0×2.5mm WQFN. | Larger package; supports higher current and wider input range; lacks spread spectrum clocking. | Choose TPS62933RTER for future-proofing beyond 1A or when needing extended input voltage margin. |
Compared with TPS628502DRLR and TPS62933RTER, the TPS628501DRLR offers optimal size-efficiency balance for 1A POL use cases - smallest footprint in the family, lowest cost, and full feature parity except output current rating.
Availability
TPS628501DRLR is available at Aetrix Electronics and suitable for motor drives, factory automation controllers, and building automation sensor nodes requiring stable component supply across long-lifecycle industrial programs.
Supply support for TPS628501DRLR 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 and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and enterprise applications.
The TPS62850x product line was engineered specifically for high-density, thermally constrained industrial POL applications - emphasizing small footprint, wide temperature operation (–40°C to +150°C), and functional safety documentation support.
FAQ
What is the maximum output current capability of the TPS628501DRLR?
The TPS628501DRLR is rated for 1A continuous output current at junction temperatures ≤105°C, with peak current capability up to 3A for short durations. Its high-side and low-side MOSFETs have RDS(on) values of 65mΩ and 33mΩ respectively at VIN ≥5V, enabling efficient operation under sustained 1A loads in compact SOT583 packaging.
Does the TPS628501DRLR support fixed-output-voltage variants?
Yes, the TPS628501DRLR supports both adjustable output (via FB pin) and fixed 1.8V output versions. The fixed variant is designated TPS6285010MDRLR. Both share identical pinout, thermal performance, and feature set - only the internal feedback divider differs, eliminating need for external resistors in 1.8V applications.
How does the MODE/SYNC pin function in the TPS628501DRLR?
In the TPS628501DRLR, the MODE/SYNC pin serves three roles: pulled low for automatic PFM/PWM mode, pulled high for forced PWM operation, and driven with a 1.8–4MHz external clock signal for synchronization. Its dual functionality enables flexible power optimization and deterministic timing in multi-rail systems without additional components.
What is the purpose of the COMP/FSET pin on the TPS628501DRLR?
The COMP/FSET pin on the TPS628501DRLR sets both the internal compensation network and switching frequency. A resistor from this pin to GND selects one of two compensation settings (for 8–200µF output capacitors) and defines fSW from 1.8–4MHz. Tying it to GND or VIN selects fixed 2.25MHz operation with corresponding compensation - simplifying design for common output capacitor values.
Can the TPS628501DRLR operate with 100% duty cycle?
Yes, the TPS628501DRLR supports 100% duty-cycle operation, allowing VOUT to approach VIN − 0.3V. This capability ensures continued regulation during input voltage sags - critical in battery-powered motor drives and industrial systems with unregulated 24V inputs subject to line drop.
TPS628501DRLR 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:
- 1A
- 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
TPS628501DRLR FAQ
1.How can I place an order for TPS628501DRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628501DRLR 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 TPS628501DRLR reliable?
The price and inventory of TPS628501DRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628501DRLR is usually 5 days.
3.What payment methods are accepted for TPS628501DRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628501DRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628501DRLR?
TPS628501DRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628501DRLR 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 TPS628501DRLR?
For technical support, including TPS628501DRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628501DRLR requirements.
6.How does Aetrix verify that TPS628501DRLR is sourced from the original manufacturer or authorized distributors?
All TPS628501DRLR 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 TPS628501DRLR meets industry standards.
7.What is the process for return or replacement of TPS628501DRLR?
All TPS628501DRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628501DRLR, 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 TPS628501DRLR part is unused and in its original packaging.
Return procedure for TPS628501DRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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