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Texas Instruments TPS62172DSGT
- Part No.:
- TPS62172DSGT
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62172DSGT.pdf
- Description:
- IC REG BUCK 3.3V 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:16,108
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Product details
Overview
TPS62172DSGT from Texas Instruments is a fixed-output 5.0 V, 0.5-A synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 3 V to 17 V input, featuring power good (PG) output, 2.25 MHz switching frequency, and 17 µA quiescent current in power save mode. It delivers regulated POL supply for battery-powered embedded systems requiring high efficiency at light loads.
For engineers reviewing the TPS62172DSGT datasheet, TPS62172DSGT pinout, TPS62172DSGT application, or TPS62172DSGT equivalent, key selection criteria include its fixed 5.0 V output, 8-pin WSON package, seamless PWM-to-power-save transition, thermal shutdown at 160°C, and compatibility with 2.2 µH inductors and 22 µF output capacitors.
Technical Context
The TPS62172DSGT implements DCS-Control™-a hybrid regulation architecture combining fast comparator-based AC loop response with voltage feedback for stable DC regulation. It operates in PWM mode at ~2.25 MHz under medium/heavy loads and transitions seamlessly into power save mode with linearly decreasing frequency at light loads.
Its control logic integrates undervoltage lockout (2.7 V threshold, 180 mV hysteresis), open-drain PG output with 92–98% rising threshold, internal 0.8 V reference, and 100% duty-cycle capability for ultra-low VIN–VOUT differentials-enabling extended runtime in Li-ion and 12-V rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V - eliminates external feedback resistors, reduces BOM count and layout area |
| Max Output Current | 500 mA continuous - supports single-rail powering of microcontrollers, sensors, and interface ICs |
| Input Voltage Range | 3 V to 17 V - compatible with single/multi-cell Li-ion batteries and standard 12-V intermediate rails |
| Switching Frequency | Typ. 2.25 MHz - enables use of compact 2.2 µH inductors and achieves fast transient response |
| Quiescent Current | 17 µA (typ.) in power save mode - extends battery life in always-on or low-duty-cycle systems |
| 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% VOUT rising threshold - enables reliable power sequencing with external pull-up |
Pinout & Package
TPS62172DSGT is housed in a thermally enhanced 2-mm × 2-mm, 8-pin WSON package (DSG) with exposed thermal pad soldered to AGND for optimal power dissipation and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Low-impedance path for high-frequency switch node current; must be connected to local ground plane |
| VIN (Pin 2) | Main input supply | Accepts 3–17 V; requires local 10 µF ceramic capacitor near pin for stability and EMI suppression |
| EN (Pin 3) | Enable control input | Active-high logic; internal 400 kΩ pull-down ensures safe default-off state during power-up |
| AGND (Pin 4) | Analog ground reference | Reference for FB/VOS/PG; must be tied to PGND at single point near exposed thermal pad |
| FB (Pin 5) | Feedback input | Internally connected to GND for fixed 5.0 V operation; recommended to tie externally to AGND for thermal improvement |
| VOS (Pin 6) | Voltage sense input | Connects directly to output rail; provides precise sensing for DCS-Control™ loop without divider error |
| SW (Pin 7) | Switch node | Drives external 2.2 µH inductor; high dv/dt node requiring tight layout and minimal trace length |
| PG (Pin 8) | Power good indicator | Open-drain output; requires external pull-up (e.g., to 3.3 V); sinks ≤2 mA when asserted low |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast AC transient response (via comparator) with stable DC regulation (voltage feedback), enabling <1% output deviation under 100 mA/µs load steps |
| Seamless power save mode | Automatic transition between PWM and PSM without output voltage glitch or audible noise-critical for noise-sensitive RF and audio subsystems |
| 100% duty cycle operation | Maintains regulation down to VIN ≈ VOUT + (IOUT × RDS(on_HS)), extending usable battery range in portable devices |
| Integrated protection | Includes overtemperature shutdown (160°C), short-circuit current limiting (~1.05 A peak), and undervoltage lockout (2.7 V with 180 mV hysteresis) |
| Small solution size | Supports full 5 V/500 mA design with only 3 external components: 2.2 µH inductor, 22 µF output cap, and 10 µF input cap |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered wireless sensor node measuring temperature/humidity with BLE transmission every 5 seconds. IC Role / Device Role / Timing Role: Primary 5 V POL regulator supplying MCU, sensor ICs, and RF transceiver from single Li-ion cell (3.0–4.2 V). Use Value: 17 µA quiescent current minimizes standby drain; 100% duty cycle sustains regulation until battery drops to ~5.1 V; PG signal sequences MCU wake-up after stable rail. | Use Scenario: Handheld vital sign monitor with OLED display, ECG front-end, and USB charging circuitry. IC Role / Device Role / Timing Role: Main 5 V supply for display driver and analog signal chain, derived from 12-V wall adapter or internal Li-poly pack. Use Value: 2.25 MHz switching avoids interference with ECG bandwidth (<1 kHz); DCS-Control™ ensures <10 mV ripple during display backlight pulses. |
| Automotive Infotainment Module | Network Edge Gateway |
Use Scenario: Low-power CAN/LIN gateway module mounted behind dashboard, powered from vehicle 12-V rail with wide cold-crank transients. IC Role / Device Role / Timing Role: Secondary 5 V rail generator for microcontroller and communication PHY, tolerant of 3–17 V input variation. Use Value: UVLO hysteresis (180 mV) prevents oscillation during slow battery recovery; thermal shutdown protects against enclosed mounting environments. | Use Scenario: Industrial Ethernet gateway with dual Ethernet PHYs, ARM Cortex-M7 MCU, and isolated RS-485 interface. IC Role / Device Role / Timing Role: Point-of-load regulator for 5 V I/O rail, fed from 12-V backplane and sequenced via EN using FPGA-controlled timing. Use Value: EN pin enables precise power-up order; PG output confirms rail readiness before enabling Ethernet MAC clock domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62171DSGT | Fixed 3.3 V output; identical package, pinout, and electrical specs except VOUT | Used where system logic requires 3.3 V instead of 5.0 V; no change to layout or external components | Select when target rail matches 3.3 V; shares same thermal and transient performance |
| TPS62160DRVR | 3–6 V input, 5 V fixed output, 1.2 MHz switching, SOT-563 package (2.1 mm × 1.6 mm) | Lower switching frequency increases inductor size but reduces EMI; smaller footprint but lower thermal performance than WSON | Choose for space-constrained designs accepting trade-offs in efficiency, thermal headroom, and transient response |
Compared with TPS62172DSGT, TPS62171DSGT offers identical form-factor and functionality at 3.3 V, while TPS62160DRVR provides a smaller package at reduced switching frequency and thermal capability-making TPS62172DSGT optimal for 5 V POL where high density, fast transients, and thermal robustness are prioritized.
Availability
TPS62172DSGT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, automotive infotainment modules, network edge gateways, and handheld instrumentation requiring stable component supply across long-lifecycle production programs.
Supply support for TPS62172DSGT 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 specializing in analog, embedded processing, and power management technologies, with leadership in high-efficiency DC-DC conversion and system-level power architecture.
The TPS6217x product line delivers compact, high-frequency synchronous buck converters for space-constrained, battery-sensitive applications-designed to replace linear regulators and legacy switching solutions in portable and industrial electronics.
FAQ
What is the fixed output voltage of the TPS62172DSGT?
The TPS62172DSGT is factory-configured for a fixed 5.0 V output voltage. Unlike the adjustable TPS62170, it does not require external feedback resistors-FB is internally connected to AGND, and VOS is used for direct output sensing. This simplifies design, improves accuracy, and reduces component count in 5 V rail applications.
Does the TPS62172DSGT support 100% duty cycle operation, and why does it matter?
Yes, the TPS62172DSGT supports 100% duty cycle operation, allowing regulation when input voltage approaches output voltage (e.g., VIN = 5.1 V → VOUT = 5.0 V). This extends usable battery life in single-cell Li-ion systems by maintaining stable 5 V output down to the lowest practical cell voltage, avoiding premature brownout shutdown.
How does the power good (PG) pin function on the TPS62172DSGT?
The PG pin on the TPS62172DSGT is an open-drain output that asserts high impedance when enabled and VOUT reaches 92–98% of nominal 5.0 V, and pulls low when VOUT falls below 87–93%. It requires an external pull-up resistor (e.g., 10 kΩ to 3.3 V) and is used for power sequencing-ensuring downstream logic only activates after stable 5 V is confirmed.
What inductor and capacitor values are recommended for the TPS62172DSGT?
Texas Instruments recommends a 2.2 µH shielded power inductor and 22 µF X5R/X7R ceramic output capacitor for the TPS62172DSGT. A 10 µF ceramic input capacitor placed close to VIN/PGND is also required. These values optimize efficiency, transient response, and EMI performance per the datasheet's typical application schematic.
Is the TPS62172DSGT pin-compatible with other devices in the TPS6217x family?
Yes, the TPS62172DSGT is pin-compatible with all members of the TPS6217x family-including TPS62170 (adjustable), TPS62171 (3.3 V), and TPS62173 (5.0 V)-in the same 2-mm × 2-mm WSON (DSG) package. Pin functions, layout, thermal pad connection, and external component requirements are identical across the series.
TPS62172DSGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 8-WFDFN 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
TPS62172DSGT FAQ
1.How can I place an order for TPS62172DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62172DSGT 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 TPS62172DSGT reliable?
The price and inventory of TPS62172DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62172DSGT is usually 5 days.
3.What payment methods are accepted for TPS62172DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62172DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62172DSGT?
TPS62172DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62172DSGT 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 TPS62172DSGT?
For technical support, including TPS62172DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62172DSGT requirements.
6.How does Aetrix verify that TPS62172DSGT is sourced from the original manufacturer or authorized distributors?
All TPS62172DSGT 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 TPS62172DSGT meets industry standards.
7.What is the process for return or replacement of TPS62172DSGT?
All TPS62172DSGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62172DSGT, 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 TPS62172DSGT part is unused and in its original packaging.
Return procedure for TPS62172DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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