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Texas Instruments TPS628302ARZER
- Part No.:
- TPS628302ARZER
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN
- Datasheet:
-
TPS628302ARZER.pdf
- Description:
- IC REG BUCK ADJ 2A 8WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
TPS628302ARZER from Texas Instruments is a 2-A 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 delivers low quiescent current (7 µA), 2.0 MHz switching frequency, and DCS-Control topology for fast transient response-used in power rails for ASICs, SoCs, and industrial PCs.
For engineers reviewing the TPS628302ARZER datasheet, TPS628302ARZER pinout, TPS628302ARZER application, or TPS628302ARZER equivalent, key selection factors include its hiccup-mode overcurrent protection, MODE-pin controllable PSM/PWM operation, active output discharge, power-good signal, and EMI-optimized design with integrated noise-filtering capacitors.
Technical Context
The TPS628302ARZER 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 high-side (35 mΩ) and low-side (18 mΩ) MOSFETs support efficient 2-A continuous output with 100% duty-cycle capability for ultra-low dropout.
It features a dedicated VOS pin for accurate post-inductor voltage sensing, MODE pin for real-time conduction mode selection (PSM vs forced-PWM), and a window-comparator-based open-drain PG output with 128 µs startup delay and 30–60 µs deglitch timing-enabling precise rail sequencing and fault monitoring.
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 industrial 3.3/5 V rails without external LDO pre-regulation. |
| Output Current | 2 A continuous - rated for sustained 2-A load at TJ ≤ 125°C with proper PCB thermal design (RθJA = 105.7°C/W). |
| Feedback Accuracy | ±1% over –40°C to 125°C - ensures stable 0.5 V–4.5 V output regulation under wide temperature and line/load conditions. |
| Quiescent Current | 7 µA - enables >10-year battery life in always-on IoT sensors when paired with light-load PSM operation. |
| Switching Frequency | 2.0 MHz - allows use of sub-1 µH inductors (e.g., 0.47 µH) and compact 12–200 µF ceramic output capacitors. |
| OCP Mode | Hiccup protection - cycles 9.6 ms off after 32 consecutive current-limit events, enabling self-recovery during intermittent shorts. |
| Soft-Start Time | 300 µs - controls inrush current during power-up, preventing input rail collapse in multi-rail systems. |
Pinout & Package
TPS628302ARZER uses an 8-pin WQFN-HR (RZE) package measuring 1.0 mm × 2.0 mm with 0.4 mm pitch and wettable flanks for automated optical inspection. Thermal pad is exposed on bottom and must be soldered to PCB ground plane for optimal thermal performance (RθJB = 30.7°C/W).
| 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 pin 1 and GND. |
| GND | Ground reference | Primary return path for power stage and control circuitry; connects to thermal pad for heat dissipation. |
| MODE | Digital control input | Pull low for auto PSM/PWM mode; pull high for forced-PWM; supports dynamic mode switching during operation. |
| FB | Feedback sense | Connects to resistor divider from VOUT; sets output voltage via VFB = 500 mV ±1% reference. |
| VOS | Output voltage sense | Direct connection to SW node side of output inductor-enables accurate remote sensing and improves load regulation. |
| PG | Open-drain status output | Asserts high-Z when VFB within 94–98% (UV) and 102.5–107% (OV) window; requires external pullup ≤5.5 V. |
| SW | Power switch node | Drives external inductor; carries high di/dt; requires tight layout with minimal loop area to reduce EMI. |
| EN | Enable control input | Active-high logic (VIH = 0.8 V); 100 nA shutdown current; must not float-tie to VIN or controller GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated noise-filtering capacitors | On-die decoupling reduces high-frequency switching noise >450 MHz, simplifying CISPR 11/32 radiated emission compliance. |
| DCS-Control topology | Delivers <10 µs load transient recovery with only 22 µF total output capacitance-no external compensation required. |
| Active output discharge | Internal 75–400 mA sink on SW pin discharges VOUT rapidly during disable, preventing back-powering of downstream circuitry. |
| 100% duty-cycle operation | Enables VOUT up to VIN − IOUT×RDS(on,HS) − IL×RL, extending usable battery range in portable applications. |
| Thermal shutdown with hysteresis | Shuts down at TJ ≥ 150°C (typ), resumes at TJ ≤ 130°C-prevents thermal runaway without system-level intervention. |
Applications
| Solid State Drive Power Rail | Industrial PC Core Supply |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM interface in embedded SSDs requiring clean, tightly regulated 1.2 V or 1.8 V at up to 2 A. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable core voltage with fast transient response to burst read/write loads. Use Value: 1% FB accuracy and DCS-Control ensure <±15 mV output deviation during 0–2 A step loads, minimizing bit-error rates. | Use Scenario: Supplies FPGA or x86 processor core voltage in fanless industrial PCs operating in –40°C to 85°C ambient. IC Role / Device Role / Timing Role: High-efficiency buck converter with hiccup OCP and thermal shutdown for unattended 24/7 operation. Use Value: 7 µA IQ extends standby time; RθJB = 30.7°C/W enables full 2-A output without heatsink in constrained chassis. |
| Analog Security Camera SoC | Factory Automation Sensor Hub |
Use Scenario: Powers image signal processor (ISP) and AI accelerator in IP cameras with strict EMI limits for CE/FCC certification. IC Role / Device Role / Timing Role: Low-noise, EMI-optimized DC/DC converter meeting CISPR 32 Class B radiated emission requirements. Use Value: Integrated on-chip capacitors and slew-controlled gate driver reduce peak emissions by >10 dBµV/m above 500 MHz. | Use Scenario: Supplies mixed-signal microcontroller and analog front-end in distributed I/O modules deployed on factory floors. IC Role / Device Role / Timing Role: Robust power management IC with PG signaling for safe power sequencing and brownout detection. Use Value: PG output enables controlled startup of ADCs and communication interfaces; 128 µs PG delay aligns with MCU reset timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628302KRZER | Same 2-A rating and RZE package, but 880 µs soft-start (vs 300 µs) and identical hiccup OCP. | Better suited for systems requiring slower ramp to avoid inrush into large capacitive loads. | Select when longer soft-start is needed to coordinate with other rails; otherwise TPS628302ARZER offers faster startup. |
| TPS62864ARZER | 2-A, 2.7–5.5 V input, 0.6–5.5 V output, 0.8% FB accuracy, but no VOS pin or integrated EMI capacitors. | Lacks VOS sensing and on-die noise filtering-requires external EMI mitigation for CISPR-compliant designs. | Choose if higher FB accuracy and wider VIN range are critical, and EMI filtering can be added externally. |
Compared with TPS628302KRZER and TPS62864ARZER, the TPS628302ARZER uniquely combines 300 µs soft-start, VOS sensing, and integrated EMI capacitors-making it optimal for space-constrained, EMI-sensitive, fast-starting industrial and imaging applications.
Availability
TPS628302ARZER is available at Aetrix Electronics and suitable for solid-state drive power rails, industrial PC core supplies, and analog security camera SoC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS628302ARZER 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 headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and digital signal processing technologies since 1930.
The TPS62830x family was developed to deliver high-efficiency, low-noise, and thermally robust point-of-load conversion for space-constrained industrial, computing, and imaging applications-emphasizing EMI reduction, fast transient response, and wide temperature operation.
FAQ
What is the maximum continuous output current of the TPS628302ARZER?
The TPS628302ARZER is rated for 2 A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 2.25–5.5 V). Derating is required above 105°C junction temperature per TI's thermal metrics-RθJA = 105.7°C/W for the RZE package ensures safe operation with adequate PCB copper area.
Does the TPS628302ARZER support adjustable output voltage?
Yes, the TPS628302ARZER 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 ±1% reference enables precise regulation-no fixed-output variants are offered in the ARZER suffix; those require separate part numbers (e.g., TPS628302Axx).
How does the MODE pin affect operation of the TPS628302ARZER?
The MODE pin selects conduction mode: pulled low enables automatic PSM/PWM transition for highest light-load efficiency; pulled high forces continuous PWM mode for lowest output ripple and fixed 2 MHz frequency. The pin accepts 1.2 V GPIO logic and supports dynamic reconfiguration during operation without restart.
What protection features are included in the TPS628302ARZER?
The TPS628302ARZER 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 latch-off OCP or overvoltage protection (OVP)-those are exclusive to 'B' and 'K' suffix variants.
Can the TPS628302ARZER operate with a prebiased output?
Yes, the TPS628302ARZER supports start-up into a prebiased output voltage. When enabled, it initially disables active discharge and ramps the output from the prebias level using internal soft-start. A full power cycle is required to re-enable active discharge if previously disabled during prebias operation.
TPS628302ARZER 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:
- 2A
- 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)
TPS628302ARZER FAQ
1.How can I place an order for TPS628302ARZER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628302ARZER 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 TPS628302ARZER reliable?
The price and inventory of TPS628302ARZER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628302ARZER is usually 5 days.
3.What payment methods are accepted for TPS628302ARZER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628302ARZER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628302ARZER?
TPS628302ARZER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628302ARZER 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 TPS628302ARZER?
For technical support, including TPS628302ARZER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628302ARZER requirements.
6.How does Aetrix verify that TPS628302ARZER is sourced from the original manufacturer or authorized distributors?
All TPS628302ARZER 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 TPS628302ARZER meets industry standards.
7.What is the process for return or replacement of TPS628302ARZER?
All TPS628302ARZER units undergo pre-shipment inspection (PSI). If there is an issue with TPS628302ARZER, 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 TPS628302ARZER part is unused and in its original packaging.
Return procedure for TPS628302ARZER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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