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Texas Instruments TPS62148RGXT
- Part No.:
- TPS62148RGXT
- Manufacturer:
- Texas Instruments
- Package:
- 11-VFQFN
- Datasheet:
-
TPS62148RGXT.pdf
- Description:
- IC REG BUCK ADJ 2A 11VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,124
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Product details
Overview
TPS62148RGXT from Texas Instruments is a high-accuracy, synchronous step-down DC/DC converter with DCS-Control topology, delivering 2-A continuous output current across a 3-V to 17-V input range. It features ±1% output voltage accuracy in PWM mode, 1.25 MHz / 2.5 MHz selectable switching frequency, and active output discharge - enabling precise POL regulation for industrial PCs and video surveillance systems.
For engineers reviewing the TPS62148RGXT datasheet, TPS62148RGXT pinout, TPS62148RGXT application, or TPS62148RGXT equivalent, key selection considerations include its VQFN-11 (2 mm × 3 mm) package, MODE/FSEL-configurable operation modes, integrated power-good signal, and support for 0.8-V to 12-V adjustable output with 100% duty-cycle capability.
Technical Context
The TPS62148RGXT implements DCS-Control topology - combining fast transient response via direct output voltage sensing with stable DC regulation through an internal compensated feedback loop. Its dual-mode control (PWM/PFM or forced PWM) adapts switching behavior based on load, input, and output voltage, while Automatic Efficiency Enhancement (AEE) dynamically scales on-time to maintain peak efficiency across wide operating conditions.
Unlike the TPS62147RGXT, the TPS62148RGXT integrates active output discharge via an internal 100-Ω switch connected to the VOS pin, enabling rapid VOUT ramp-down during shutdown. It also uses HICCUP overcurrent protection only in the TPS62147 variant; the TPS62148 employs cycle-by-cycle current limiting with thermal shutdown at 160°C and UVLO thresholds of 2.8–3.0 V (rising) and 2.5–2.7 V (falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports multi-cell Li-ion batteries and standard 12-V intermediate rails without external pre-regulation. |
| Output Current | 2 A continuous - sustains full-rated load under worst-case thermal conditions (RθJA = 38.4°C/W, TJ ≤ 125°C). |
| Output Voltage Accuracy | ±1% in PWM mode - enables tight regulation for sensitive logic supplies (e.g., FPGA core, SoC I/O) without post-regulation. |
| Quiescent Current | 18 µA typical - minimizes standby power loss in always-on industrial monitoring nodes. |
| Switching Frequency | 1.25 MHz or 2.5 MHz (FSEL-selectable) - allows compact 2.2-µH or 1-µH inductors and reduces EMI filtering burden. |
| Active Output Discharge | Integrated 100-Ω switch on VOS pin - discharges output capacitance rapidly during disable, meeting sequencing requirements in multi-rail systems. |
| Power-Good Output | Open-drain PG with 93–98% VOUT threshold - provides reliable rail validation for processor reset or downstream enable sequencing. |
Pinout & Package
TPS62148RGXT is housed in a thermally enhanced 11-pin VQFN package (RGX), measuring 2.0 mm × 3.0 mm with 0.4-mm pitch and exposed thermal pad. The package supports high-density PCB layouts and efficient heat transfer to the board via bottom-side copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 3–17 V; requires low-ESR ceramic capacitor placed adjacent to pin for stability and transient response. |
| SW | Switch node | Connects to external inductor; carries high di/dt pulses - critical for minimizing EMI and layout parasitics. |
| GND / AGND | Ground reference | GND is power ground; AGND is analog ground - both must be tied together at single point near IC for noise immunity. |
| FB | Voltage feedback | Senses output via resistive divider; sets regulated VOUT = 0.7 V × (1 + R1/R2); leakage < 70 nA ensures accuracy. |
| VOS | Output voltage sense | Direct connection to output capacitor positive terminal - enables accurate remote sensing and activates internal discharge switch. |
| PG | Power-good indicator | Open-drain output asserting when VOUT reaches 93–98% target; sinks 2 mA - used for system-level sequencing. |
| EN | Enable control | Logic-compatible input with 0.7–0.83 V rising threshold; supports programmable UVLO and startup delay via RC network. |
| SS/TR | Soft-start / tracking | Capacitor-based ramp control or external voltage tracking input - ensures monotonic startup and coordinated rail sequencing. |
| MODE | Operation mode select | Pull low for auto PWM/PFM + AEE; pull high for forced PWM - determines efficiency vs. ripple trade-off. |
| FSEL | Frequency select | Pull low → 1.25 MHz; pull high → 2.5 MHz - selects inductor value and impacts light-load efficiency and EMI profile. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Combines hysteretic speed with voltage-mode stability - achieves <10-µs load transient recovery and <10-mV undershoot for 1-A step changes. |
| Adjustable soft start | Programmable rise time via SS/TR capacitor - prevents inrush current and enables controlled power-up in multi-rail systems. |
| 100% duty-cycle mode | Maintains regulation down to VIN ≈ VOUT + 15% - extends battery runtime in portable industrial sensors and edge devices. |
| Automatic Efficiency Enhancement (AEE) | Dynamically adjusts on-time in PFM mode - sustains >85% efficiency from 1 mA to 2 A across 3–17 V input range. |
| Precise ENABLE input | 0.8-V threshold with 100-mV hysteresis - enables robust undervoltage lockout and exact power sequencing without external comparators. |
Applications
| Standard 12-V Rail Supplies | Mobile and Embedded Computers |
|---|---|
Use Scenario: Converting 12-V intermediate bus to 3.3-V or 5-V logic rails in PLC backplanes and DIN-rail controllers. IC Role / Device Role / Timing Role: Primary POL regulator delivering clean, sequenced, and monitored 2-A output with fast transient response. Use Value: ±1% accuracy and PG output ensure compliance with IPC-2581-compliant power sequencing specs for multi-core processors. | Use Scenario: Powering ARM-based HMIs and rugged tablets operating from 3–4S Li-ion packs (12.6–16.8 V). IC Role / Device Role / Timing Role: Main SoC core supply with adaptive frequency scaling (AEE) to maximize battery life during idle/sleep states. Use Value: 18-µA quiescent current and 100% duty-cycle mode extend runtime by >12% versus fixed-frequency buck converters. |
| Factory Automation, PLC, Industrial PC | Building Automation, Video Surveillance |
Use Scenario: Generating isolated 1.8-V/3.3-V rails for FPGA configuration, Ethernet PHYs, and real-time I/O modules. IC Role / Device Role / Timing Role: High-reliability DC/DC stage with thermal shutdown (160°C) and HICCUP-free overcurrent protection. Use Value: Active output discharge (TPS62148-specific) meets IEC 61000-4-2 Level 4 ESD-safe shutdown timing requirements. | Use Scenario: Powering IP cameras and NVRs with PoE+ or local 12-V adapters, requiring silent operation and low EMI. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-capable regulator supporting 1.25-MHz operation to avoid RF interference bands. Use Value: DCS-Control topology delivers <5-mV p-p ripple at 2 A - eliminates need for post-LDO filtering in image sensor analog chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62147RGXT | No active output discharge; uses HICCUP overcurrent protection instead of cycle-by-cycle limiting. | Suitable where fast VOUT discharge is not required and fault tolerance favors latch-off behavior. | Select TPS62147RGXT if system-level sequencing does not require active discharge and thermal robustness is prioritized over fast shutdown. |
| TPS62130ARGXT | Lower 3–6-V input range; 3-A rating; no AEE or VOS pin; fixed 2.5-MHz frequency. | Better suited for single-cell Li-ion (3.0–4.2 V) applications needing higher current but less flexibility. | Choose TPS62130ARGXT only for narrow-input, high-current designs where 17-V max input and discharge functionality are unnecessary. |
Compared with TPS62147RGXT, the TPS62148RGXT adds active discharge and removes HICCUP protection - making it preferable for tightly sequenced multi-rail systems. Versus TPS62130ARGXT, it trades higher current for wider VIN, AEE, and precision features essential in 12-V industrial environments.
Availability
TPS62148RGXT is available at Aetrix Electronics and suitable for factory automation, video surveillance, and industrial PC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for TPS62148RGXT 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 TPS62148RGXT belongs to TI's DCS-Control buck converter family, designed specifically for industrial and embedded applications demanding high accuracy, ultra-low quiescent current, and seamless light-load efficiency across wide input voltage ranges.
FAQ
What is the maximum output current capability of the TPS62148RGXT?
The TPS62148RGXT delivers up to 2 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, RθJA = 38.4°C/W). This rating assumes proper PCB thermal design with adequate copper area under the exposed thermal pad. Peak current capability exceeds 3.5 A due to internal cycle-by-cycle current limiting, but sustained operation above 2 A requires derating based on ambient temperature and airflow.
Does the TPS62148RGXT support adjustable output voltage, and what is the minimum achievable value?
Yes, the TPS62148RGXT supports fully adjustable output voltage from 0.8 V to 12 V using an external resistor divider on the FB pin. The internal reference voltage is 0.7 V, so the minimum output is set by VOUT = 0.7 V × (1 + R1/R2). With R2 = 100 kΩ and R1 = 0 Ω, the theoretical minimum is 0.7 V, but the datasheet specifies 0.8 V as the guaranteed operational lower limit due to FB pin accuracy and layout tolerances.
How does the active output discharge function work on the TPS62148RGXT?
The TPS62148RGXT integrates an internal 100-Ω NMOS switch between the VOS pin and GND. When the device is disabled (EN = low), this switch turns on, actively discharging the output capacitor through VOS. This ensures rapid VOUT ramp-down - critical for meeting strict power sequencing requirements in multi-rail systems. The TPS62147RGXT lacks this feature, relying solely on passive discharge paths.
Can the TPS62148RGXT operate with input voltages below 3 V?
No, the TPS62148RGXT has a specified minimum input voltage of 3 V per absolute maximum and recommended operating conditions. Operation below 3 V risks failure to regulate, improper UVLO behavior, or undefined state transitions. The undervoltage lockout (UVLO) rising threshold is 2.8–3.0 V, meaning the device will remain disabled until VIN exceeds this range. For sub-3-V inputs, consider TI's TPS6286x or TPS629xx families.
What is the purpose of the VOS pin on the TPS62148RGXT, and how should it be connected?
The VOS (Voltage Output Sense) pin on the TPS62148RGXT provides Kelvin sensing of the output voltage at the load, improving regulation accuracy by rejecting PCB trace IR drop. It must be connected directly to the positive terminal of the main output capacitor - not to the SW or FB nodes. In addition, VOS serves as the connection point for the internal active discharge switch, making correct routing essential for both accuracy and safe shutdown behavior.
TPS62148RGXT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 11-VFQFN
- 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):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 11-VQFN-HR (2x3)
TPS62148RGXT FAQ
1.How can I place an order for TPS62148RGXT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62148RGXT 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 TPS62148RGXT reliable?
The price and inventory of TPS62148RGXT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62148RGXT is usually 5 days.
3.What payment methods are accepted for TPS62148RGXT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62148RGXT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62148RGXT?
TPS62148RGXT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62148RGXT 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 TPS62148RGXT?
For technical support, including TPS62148RGXT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62148RGXT requirements.
6.How does Aetrix verify that TPS62148RGXT is sourced from the original manufacturer or authorized distributors?
All TPS62148RGXT 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 TPS62148RGXT meets industry standards.
7.What is the process for return or replacement of TPS62148RGXT?
All TPS62148RGXT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62148RGXT, 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 TPS62148RGXT part is unused and in its original packaging.
Return procedure for TPS62148RGXT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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