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Texas Instruments TPS628301ARZER
- Part No.:
- TPS628301ARZER
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN
- Datasheet:
-
TPS628301ARZER.pdf
- Description:
- IC REG BUCK ADJ 1A 8WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,699
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Product details
Overview
TPS628301ARZER from Texas Instruments is a 1-A synchronous step-down DC/DC converter in a 1.0 mm × 2.0 mm WQFN-HR (RZE) package, supporting 2.25 V to 5.5 V input and 0.5 V to 4.5 V adjustable output with 1% feedback voltage accuracy across –40°C to 125°C. It delivers ultra-low 7 µA quiescent current, 2.0 MHz switching frequency, and DCS-Control topology for fast transient response in space-constrained portable and industrial power rails.
For engineers reviewing the TPS628301ARZER datasheet, TPS628301ARZER pinout, TPS628301ARZER application, or TPS628301ARZER equivalent, key selection criteria include its hiccup-mode overcurrent protection, 300 µs internal soft-start, active output discharge, power-good signal, and EMI-optimized design with integrated noise-filtering capacitors for CISPR 11/32 compliance.
Technical Context
The TPS628301ARZER 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 high-side and low-side MOSFETs feature 35 mΩ and 18 mΩ RDS(on) at VIN ≥ 5 V, supporting efficient operation down to light loads while maintaining tight regulation via 0.5 V internal reference.
It integrates a MODE pin for real-time conduction mode selection (PSM/PWM vs forced-PWM), a dedicated VOS pin for accurate post-inductor voltage sensing, and a PG open-drain output with window-comparator-based undervoltage/overvoltage detection (94–98% UV, 108–112% OV thresholds). Thermal shutdown triggers at 150°C with 20°C hysteresis.
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 supplies without external LDO pre-regulation. |
| Output Current | 1 A continuous - rated for sustained load in compact point-of-load applications like SoC I/O or camera sensor rails. |
| Feedback Accuracy | ±1% over –40°C to 125°C - ensures stable output regulation across automotive and industrial temperature extremes. |
| Quiescent Current | 7 µA - enables multi-day battery life in always-on portable electronics with minimal standby drain. |
| Switching Frequency | 2.0 MHz - allows use of sub-1 µH inductors and small ceramic capacitors, reducing solution size and cost. |
| OCP Mode | Hiccup - provides self-recovering fault handling during short-circuit events without requiring system-level reset intervention. |
| Soft-Start Time | 300 µs - controls inrush current during power-up to prevent input rail droop and avoid false brownout detection. |
Pinout & Package
TPS628301ARZER is housed in an 8-pin WQFN-HR (RZE) package measuring 1.0 mm × 2.0 mm with 0.4 mm pitch, optimized for high thermal performance (RθJA = 105.7°C/W) and PCB area efficiency in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.25–5.5 V supply; requires local 3 µF effective input capacitance placed adjacent to minimize high-frequency loop inductance. |
| GND | Ground reference | Primary return path for power and control circuits; must be connected to low-impedance ground plane under IC body. |
| MODE | Digital mode select | Pull low for PSM/PWM auto-mode (efficiency-optimized); pull high for forced-PWM (low ripple, fixed frequency); not floating. |
| FB | Feedback input | Connects to resistor divider from VOUT; sets output voltage per VFB = 0.5 V ±1%; leakage <70 nA avoids divider error. |
| VOS | Output voltage sense | Direct connection to SW node side of output inductor-enables accurate remote sensing and improves load regulation. |
| PG | Power-good output | Open-drain signal asserting high when VOUT is within 94–98% of target; requires external pullup ≤5.5 V for rail sequencing. |
| SW | Power switch node | Drives external inductor; carries high di/dt; must be routed with minimal loop area and no vias to reduce EMI. |
| EN | Enable control | Active-high logic input (VIL = 0.35 V, VIH = 0.8 V); 100 nA shutdown current enables direct microcontroller GPIO drive. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers <10 µs load transient recovery with only 12–200 µF output capacitance, eliminating need for large bulk caps. |
| Integrated EMI filtering capacitors | Reduces high-frequency radiated emissions >450 MHz, enabling CISPR 11 Class B compliance without added ferrites or shielding. |
| 100% duty cycle operation | Extends battery runtime by maintaining regulation down to VIN − VOUT ≈ IOUT × 35 mΩ, critical for deep-discharge Li-ion systems. |
| Active output discharge | Discharges VOUT through SW pin when EN is low (75–400 mA sink), preventing unintended downstream biasing or latch-up. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction and resumes only after cooling by ≥20°C, preventing thermal runaway in sealed enclosures. |
Applications
| Solid State Drive Power | Portable Electronics |
|---|---|
Use Scenario: Supplies 1.2 V core and 1.8 V I/O rails for NAND flash controllers and DRAM in M.2 and U.2 SSDs. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated, low-noise 1 A output with fast transient response to handle bursty NAND programming currents. Use Value: 1% FB accuracy and DCS-Control ensure stable VDDQ during 100+ ns write pulses; 2 MHz switching enables compact 0.47 µH inductor + 10 µF output cap solution. | Use Scenario: Powers application processors and PMIC subsystems in handheld medical monitors and ruggedized tablets. IC Role / Device Role / Timing Role: Main buck converter for SoC core voltage, interfacing directly with 1.2 V GPIO-controlled enable and MODE pins. Use Value: 7 µA IQ extends battery life beyond 72 hours in sleep mode; hiccup OCP prevents thermal damage during accidental short-circuit during field servicing. |
| Analog Security Camera | Industrial PC Power |
Use Scenario: Generates 3.3 V and 1.8 V rails for CMOS image sensors, ISP processors, and video encoders in IP cameras. IC Role / Device Role / Timing Role: Dual-rail POL converter with independent FB resistors, leveraging PG signal for synchronized startup with FPGA configuration. Use Value: VOS pin enables precise regulation at sensor location despite PCB trace IR drop; EMI optimization meets EN 55032 Class B without layout redesign. | Use Scenario: Provides 1.0 V core supply for Intel Atom or AMD G-series processors in fanless IPCs operating at 60°C ambient. IC Role / Device Role / Timing Role: High-efficiency buck stage with forced-PWM mode selected via MODE pin to suppress switching noise near sensitive analog front-ends. Use Value: 35/18 mΩ MOSFETs and 105.7°C/W thermal resistance sustain 1 A load at full junction temperature without derating; 300 µs soft-start prevents CPU reset during cold boot. |
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 | 2 A output rating, identical package, same hiccup OCP and 300 µs soft-start. | Supports higher-current SoC cores or dual-rail designs where margin is required. | Select when future-proofing for 2 A peak loads or paralleling with second TPS628301ARZER for redundancy. |
| TPS628601RTER | 1 A, 2.7–6.5 V input, 1.8–5.5 V fixed-output options, 1.8 MHz switching, lower IQ (2.5 µA), but no VOS pin or PG output. | Lacks power sequencing and remote sensing capability; suited for simpler, non-critical rails. | Choose for cost-sensitive, low-complexity applications where PG and VOS are unnecessary and input exceeds 5.5 V. |
Compared with TPS628302ARZER, the TPS628301ARZER offers tighter current rating alignment for 1 A systems and identical thermal/EMI behavior in the same RZE package; versus TPS628601RTER, it trades slightly higher IQ for essential system-level features including PG signaling, VOS sensing, and robust hiccup protection-critical for industrial and imaging applications.
Availability
TPS628301ARZER is available at Aetrix Electronics and suitable for solid state drives, portable medical electronics, analog security cameras, and industrial PCs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS628301ARZER 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, battery-sensitive applications demanding ultra-low IQ, high accuracy, and certified EMI performance-targeting next-generation portable, imaging, and industrial edge devices.
FAQ
What is the maximum output current supported by the TPS628301ARZER?
The TPS628301ARZER is rated for 1 A continuous output current across its full operating temperature range (–40°C to 125°C junction), as confirmed in the Device Options table and Recommended Operating Conditions section of the datasheet. This rating assumes proper PCB thermal design with adequate copper area and airflow per the thermal metrics (RθJA = 105.7°C/W).
Does the TPS628301ARZER support adjustable output voltage?
Yes, the TPS628301ARZER supports fully adjustable output voltage from 0.5 V to 4.5 V using an external resistor divider connected to the FB pin, with 1% feedback voltage accuracy maintained over –40°C to 125°C. Fixed-output variants exist but require separate part numbers (e.g., TPS628301xxRTER series).
What protection features does the TPS628301ARZER include?
The TPS628301ARZER includes hiccup-mode overcurrent protection, thermal shutdown with 20°C hysteresis, undervoltage lockout (UVLO), active output discharge, and power-good monitoring with window-comparator-based undervoltage/overvoltage detection. It does not include latch-off OCP or standalone overvoltage protection-those are exclusive to 'B' suffix variants like TPS628303BDRLR.
Can the TPS628301ARZER operate with a 100% duty cycle?
Yes, the TPS628301ARZER supports 100% duty cycle operation, enabling regulation when input voltage approaches output voltage-critical for maximizing battery utilization in single-cell Li-ion systems. In this mode, the high-side FET remains continuously on while the low-side FET is disabled, with dropout determined by RDS(on) and inductor DCR.
Is the TPS628301ARZER pin-compatible with other devices in the TPS62830x family?
Yes, all TPS62830x devices-including TPS628301ARZER, TPS628302ARZER, TPS628303ARZER, and TPS628304ARZER-in the RZE (WQFN-HR) package are pin-to-pin compatible. This allows scalable current capacity upgrades on the same PCB layout without redesign, provided thermal and inductor current ratings are verified.
TPS628301ARZER 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:
- 1A
- 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)
TPS628301ARZER FAQ
1.How can I place an order for TPS628301ARZER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628301ARZER 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 TPS628301ARZER reliable?
The price and inventory of TPS628301ARZER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628301ARZER is usually 5 days.
3.What payment methods are accepted for TPS628301ARZER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628301ARZER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628301ARZER?
TPS628301ARZER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628301ARZER 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 TPS628301ARZER?
For technical support, including TPS628301ARZER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628301ARZER requirements.
6.How does Aetrix verify that TPS628301ARZER is sourced from the original manufacturer or authorized distributors?
All TPS628301ARZER 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 TPS628301ARZER meets industry standards.
7.What is the process for return or replacement of TPS628301ARZER?
All TPS628301ARZER units undergo pre-shipment inspection (PSI). If there is an issue with TPS628301ARZER, 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 TPS628301ARZER part is unused and in its original packaging.
Return procedure for TPS628301ARZER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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