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Texas Instruments TPS62151RGTT
- Part No.:
- TPS62151RGTT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS62151RGTT.pdf
- Description:
- IC REG BUCK 1.8V 1A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:405
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Product details
Overview
TPS62151RGTT from Texas Instruments is a 1-A synchronous step-down DC-DC converter with fixed 1.8-V output, DCS-Control™ topology, 3-V to 17-V input range, and 17-µA quiescent current - designed for POL supplies in solid-state drives, embedded systems, and mobile PCs.
For engineers reviewing the TPS62151RGTT datasheet, TPS62151RGTT pinout, TPS62151RGTT application, or TPS62151RGTT equivalent, key selection criteria include its 1.8-V fixed output, VQFN-16 (3 mm × 3 mm) package, power-good open-drain output, seamless PWM-to-power-save mode transition, and thermal/short-circuit protection.
Technical Context
The TPS62151RGTT implements DCS-Control™ topology, combining voltage-mode and hysteretic control to deliver fast transient response and high output-voltage accuracy without external compensation. Its internal error amplifier and direct-control comparator enable stable regulation with low-ESR capacitors and small inductors.
It supports dual operating frequencies (1.25 MHz / 2.5 MHz via FSW pin), 100% duty-cycle operation for ultra-low dropout, and programmable soft-start/tracking via SS/TR pin - enabling monotonic start-up into pre-biased rails and precise power sequencing with EN and PG pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single/multi-cell Li-ion batteries and standard 12-V intermediate rails. |
| Output Voltage | Fixed 1.8 V ±1.5% - internally trimmed; no external feedback resistors required. |
| Max Output Current | 1 A continuous - sustained across full temperature range (–40°C to +125°C). |
| Quiescent Current | 17 µA typical - enables >100-hour battery life in always-on embedded sensors. |
| Switching Frequency | Selectable 1.25 MHz or 2.5 MHz - balances efficiency vs. solution size; 2.5-MHz default enables ≤1-µH inductors. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Power-Good Output | Open-drain PG with 92–98% rising threshold - provides reliable rail sequencing signal for downstream logic. |
Pinout & Package
TPS62151RGTT uses a 16-pin VQFN package (RGT) with 3.00 mm × 3.00 mm body and exposed thermal pad soldered to AGND/PGND for optimal thermal performance (RθJA = 45°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3 SW | Switch node | Connects to inductor; carries high-frequency pulsed current; requires low-inductance layout to minimize EMI. |
| 4 PG | Power-good output | Open-drain status signal; requires external pullup; asserts high when VOUT ≥ 92% of nominal. |
| 5 FB | Feedback input | Internally connected to fixed 1.8-V divider; recommended tied to AGND for thermal stability. |
| 6 AGND | Analog ground | Reference for control circuitry; must connect directly to thermal pad and system ground plane. |
| 7 FSW | Frequency select | Pull low for 2.5-MHz operation (default); pull high for 1.25-MHz to improve light-load efficiency. |
| 8 DEF | Output voltage scaling | Pull high to raise output to 1.89 V (+5%); internal 400-kΩ pulldown ensures nominal voltage if floating. |
| 9 SS/TR | Soft-start/tracking | External capacitor sets ramp time; supports pre-biased start-up and voltage tracking with master rail. |
| 10 AVIN | Analog supply | Bias for control logic; tie to PVIN to avoid noise coupling between analog and power domains. |
| 11,12 PVIN | Power supply input | High-current path for MOSFET drivers; requires local 10-µF ceramic decoupling near pins. |
| 13 EN | Enable input | Active-high logic; internal 400-kΩ pulldown ensures shutdown on float; enables multi-rail sequencing. |
| 14 VOS | Voltage sense | Direct connection to output for precision regulation; improves load/line regulation vs. remote sensing. |
| 15,16 PGND | Power ground | Return path for high-current switches; must connect to thermal pad and minimize loop area with PVIN/SW. |
| Exposed Pad | Thermal & electrical ground | Soldered to AGND/PGND plane; critical for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <1% output voltage deviation under 1-A load step with no external compensation components. |
| Seamless power-save mode | Maintains >85% efficiency at 1-mA load while eliminating audible switching noise and output ripple spikes. |
| 100% duty-cycle operation | Regulates down to VIN = VOUT + IOUT × RDS(on) - extends battery runtime in Li-ion applications below 2.5 V. |
| Programmable soft-start | Adjustable start-up time (1–100 ms) via SS/TR capacitor prevents inrush current in high-capacitance loads. |
| Integrated protection | Combines thermal shutdown (160°C), overcurrent limiting (~1.7 A peak), and undervoltage lockout (2.7 V) with hysteresis. |
Applications
| Solid-State Drives (SSD) | Embedded Industrial Controllers |
|---|---|
Use Scenario: Powering NAND flash memory and controller ICs in M.2 SATA/NVMe SSDs with tight space constraints. IC Role / Device Role / Timing Role: Primary 1.8-V POL regulator delivering clean, low-noise power with fast transient response to handle burst write/read loads. Use Value: DCS-Control™ ensures <50-mV undershoot during 1-A load steps, preventing data corruption in flash memory arrays. | Use Scenario: Supplying FPGA I/O banks and microcontroller cores in programmable logic controllers (PLCs) operating in harsh environments. IC Role / Device Role / Timing Role: High-reliability 1.8-V supply with thermal shutdown and short-circuit protection for unattended 24/7 operation. Use Value: 17-µA quiescent current and 125°C junction rating support fanless enclosure designs with extended service intervals. |
| Mobile Computing Peripherals | Point-of-Sale (POS) Terminals |
Use Scenario: Powering USB-C interface controllers, display drivers, and touch controllers in compact tablets and docking stations. IC Role / Device Role / Timing Role: Compact 3-mm × 3-mm POL regulator enabling thin-profile PCBs while supporting dynamic power states (active/idle/sleep). Use Value: Seamless PWM-to-power-save transition eliminates efficiency cliffs, extending battery life by up to 18% in mixed-use scenarios. | Use Scenario: Providing regulated 1.8-V power to smart card readers, barcode scanners, and secure element ICs in retail POS terminals. IC Role / Device Role / Timing Role: Safety-certified auxiliary rail with PG signaling to coordinate secure boot sequence and peripheral initialization. Use Value: Open-drain PG output interfaces directly with ARM Cortex-M boot ROMs to enforce strict power-on reset timing windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62152RGTT | Fixed 3.3-V output; identical pinout, package, and feature set. | Requires redesign of output filter and load interface for higher voltage rail. | Select when system needs 3.3-V logic supply instead of 1.8-V core voltage. |
| TPS62130ARGTT | Adjustable output (0.9–6 V); same 1-A rating but lacks DEF/FSW pins and has different PG logic. | Needs external feedback resistors and cannot support voltage margining or frequency selection. | Choose only if adjustable output and lower BOM cost outweigh loss of 1.8-V optimization and advanced sequencing features. |
Compared with TPS62152RGTT and TPS62130ARGTT, the TPS62151RGTT delivers optimized 1.8-V regulation with integrated voltage scaling (DEF), frequency selection (FSW), and tracking (SS/TR) - reducing external component count by 30% and enabling tighter power sequencing in space-constrained applications.
Availability
TPS62151RGTT is available at Aetrix Electronics and suitable for solid-state drives, embedded industrial controllers, and mobile computing peripherals requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS62151RGTT 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 over 90 years of innovation in high-reliability electronics.
The TPS6215x product line targets high-density point-of-load conversion in battery-powered and industrial systems, emphasizing ultra-low quiescent current, seamless light-load efficiency, and robust protection for mission-critical operation.
FAQ
What is the output voltage tolerance of the TPS62151RGTT under full load and temperature range?
The TPS62151RGTT delivers a fixed 1.8-V output with ±1.5% initial accuracy over –40°C to +125°C junction temperature and full 1-A load. This specification includes line and load regulation effects, verified per TI's SLVSAL5E datasheet Section 7.5, and remains stable across input voltages from 3 V to 17 V without external trimming.
Does the TPS62151RGTT require external feedback resistors for its 1.8-V output?
No, the TPS62151RGTT does not require external feedback resistors. Its 1.8-V output is internally trimmed using a precision resistor divider, and the FB pin is internally connected to this network. TI recommends connecting FB directly to AGND in fixed-output versions to enhance thermal performance and reduce noise coupling.
How does the TPS62151RGTT handle start-up into a pre-biased output voltage?
TPS62151RGTT supports monotonic pre-biased start-up: when enabled, it holds both MOSFETs off until its internal soft-start ramp exceeds the existing output voltage. This prevents reverse current flow and ensures controlled voltage rise, as confirmed in Section 8.3.2 of the SLVSAL5E datasheet and validated in Figure 9-34.
What is the minimum input voltage required for the TPS62151RGTT to maintain 1.8-V regulation at 1-A load?
At 1-A load, the TPS62151RGTT maintains 1.8-V regulation down to approximately 2.15 V input, calculated using VIN(min) = VOUT + IOUT × RDS(on) + IOUT × RL, where RDS(on) (high-side) is 120 mΩ at 3 V input and typical inductor DCR is ~20 mΩ - consistent with Section 8.4.3 equations and thermal derating limits.
Can the TPS62151RGTT be used in place of an LDO for 1.8-V regulation, and what are the key trade-offs?
Yes, the TPS62151RGTT is explicitly positioned as an LDO replacement in TI's documentation. Key trade-offs include higher efficiency (>90% vs. <50% for LDOs at 12-V input), reduced thermal stress, and smaller solution size - offset by added complexity in EMI filtering and inductor selection. Its 17-µA quiescent current also matches ultra-low-IQ LDOs, making it viable for always-on systems.
TPS62151RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS62151RGTT FAQ
1.How can I place an order for TPS62151RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62151RGTT 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 TPS62151RGTT reliable?
The price and inventory of TPS62151RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62151RGTT is usually 5 days.
3.What payment methods are accepted for TPS62151RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62151RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62151RGTT?
TPS62151RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62151RGTT 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 TPS62151RGTT?
For technical support, including TPS62151RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62151RGTT requirements.
6.How does Aetrix verify that TPS62151RGTT is sourced from the original manufacturer or authorized distributors?
All TPS62151RGTT 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 TPS62151RGTT meets industry standards.
7.What is the process for return or replacement of TPS62151RGTT?
All TPS62151RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62151RGTT, 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 TPS62151RGTT part is unused and in its original packaging.
Return procedure for TPS62151RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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