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Texas Instruments TPS62171DSGR
- Part No.:
- TPS62171DSGR
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62171DSGR.pdf
- Description:
- IC REG BUCK 1.8V 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:334
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Product details
Overview
TPS62171DSGR from Texas Instruments is a fixed-output 1.8 V, 500-mA synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 3 V to 17 V input and delivering high efficiency across light-to-heavy loads in space-constrained applications such as battery-powered mobile PCs and digital cameras.
For engineers reviewing the TPS62171DSGR datasheet, TPS62171DSGR pinout, TPS62171DSGR application, or TPS62171DSGR equivalent, key selection criteria include its 2.25-MHz switching frequency, 17-µA quiescent current in power save mode, integrated power good (PG) output, and 2-mm × 2-mm WSON-8 package with exposed thermal pad for thermal reliability.
Technical Context
The TPS62171DSGR implements DCS-Control™ - a hybrid regulation architecture combining fast AC response via direct output voltage sensing with stable DC regulation through an internal error amplifier and compensated loop. It operates in PWM mode at ~2.25 MHz under medium/heavy loads and transitions seamlessly into power save mode at light loads, maintaining >85% efficiency down to 10 µA output current.
Its control logic integrates undervoltage lockout (2.7 V threshold with 180 mV hysteresis), thermal shutdown (160°C trip with 20°C hysteresis), short-circuit protection via dynamic current limiting, and 100% duty-cycle operation for ultra-low dropout - enabling reliable operation from single Li-ion or 12-V rails without external sequencing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports direct connection to 12-V intermediate rails or 1–4-cell Li-ion batteries without pre-regulation. |
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors, reducing BOM count and layout area. |
| Max Output Current | 500 mA continuous - sufficient for powering core logic, FPGAs, or imaging sensors in portable devices. |
| Switching Frequency | Typ. 2.25 MHz - enables use of compact 2.2 µH inductors and <22 µF ceramic output capacitors for high-density designs. |
| Quiescent Current | 17 µA (typ.) - extends battery runtime in always-on or low-power standby modes. |
| Power Good Output | Open-drain PG with 92–98% VOUT threshold - provides reliable rail sequencing and system reset signaling. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS62171DSGR is housed in a thermally enhanced 2-mm × 2-mm 8-pin WSON (DSG) package with an exposed thermal pad that must be soldered to AGND for optimal power dissipation and mechanical 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 directly to input capacitor ground. |
| VIN (Pin 2) | Main power input | Accepts 3–17 V supply; requires local 10 µF ceramic decoupling capacitor near pin. |
| EN (Pin 3) | Enable control input | Active-high logic; internal 400-kΩ pull-down ensures safe default-off state; supports power-rail sequencing. |
| AGND (Pin 4) | Analog ground reference | Reference for FB, VOS, and internal error amplifier; must be tied to PGND at single point near IC. |
| FB (Pin 5) | Feedback input | Internally connected to GND for fixed 1.8 V output; recommended to tie externally to AGND for improved thermal resistance. |
| VOS (Pin 6) | Voltage sense input | Connects to output rail for precise regulation; enables accurate load transient response via DCS-Control™ loop. |
| 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 requiring external pull-up; signals VOUT ≥92% nominal after soft-start completion. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast transient response (<10 µs recovery) with ±1.5% DC output accuracy over line/load/temperature - no external compensation required. |
| Seamless power save mode | Automatic transition between PWM and PSM maintains >85% efficiency from 10 µA to 500 mA load - eliminates audible noise and output ripple spikes. |
| 100% duty cycle operation | Enables regulation down to VIN = VOUT + (IOUT × RDS(on)_HS), extending usable battery life in deep discharge conditions. |
| Integrated protection suite | Includes UVLO (2.7 V), thermal shutdown (160°C), short-circuit limiting, and soft-start (25 mV/µs ramp) - reduces need for external fault management circuitry. |
| WSON-8 thermal pad | Exposed copper pad lowers RθJB to 15.5°C/W - allows 500 mA operation at +85°C ambient with minimal copper area. |
Applications
| Mobile PC Core Supply | Digital Camera Sensor Rail |
|---|---|
Use Scenario: Powers CPU I/O or memory interface in sub-10W tablet-PCs using single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary POL buck regulator delivering stable 1.8 V at up to 500 mA with fast load-step response. Use Value: DCS-Control™ ensures <50 mV output deviation during 100 mA → 400 mA transients, preventing sensor data corruption or display glitches. | Use Scenario: Supplies image sensor analog front-end in DSLR or mirrorless cameras with burst-mode current demands. IC Role / Device Role / Timing Role: Low-noise, high-PSRR DC-DC source replacing LDO to improve efficiency while meeting strict analog rail ripple limits. Use Value: 2.25-MHz switching and integrated soft-start suppress inrush current and EMI, avoiding interference with CCD/CMOS timing signals. |
| Industrial IoT Node MCU Rail | Modem Baseband Processor Supply |
Use Scenario: Powers ARM Cortex-M microcontroller and wireless transceiver in battery-operated edge sensor nodes. IC Role / Device Role / Timing Role: Always-on 1.8 V supply with ultra-low IQ (17 µA) and robust start-up into pre-biased outputs. Use Value: Power save mode sustains >90% efficiency at 20 µA sleep current, enabling multi-year battery life without complex power-state management. | Use Scenario: Generates 1.8 V core voltage for LTE/5G baseband processors in compact modems powered from 12-V automotive or PoE sources. IC Role / Device Role / Timing Role: High-input-voltage buck converter supporting wide VIN range (3–17 V) with integrated PG for system boot coordination. Use Value: PG output synchronizes modem firmware initialization with stable 1.8 V rail, eliminating boot failures due to premature enable 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 |
|---|---|---|---|
| TPS62160DRVR | Same 2.25-MHz DCS-Control™, but adjustable output (0.6–5.5 V); 1.2-V min VOUT; 400-mA rating. | Requires external resistor divider; less suitable for cost-sensitive fixed-voltage systems. | Select when output voltage flexibility or lower minimum VOUT is needed; not drop-in for TPS62171DSGR. |
| TPS62825ADSGR | Newer generation: 4-MHz switching, 1.2-µA IQ, 1-A rating, same 2-mm × 2-mm WSON-8 package. | Higher performance and efficiency, but requires updated layout for higher-frequency stability and EMI filtering. | Choose for next-gen designs prioritizing ultra-low IQ and higher current; pinout-compatible but not functionally identical. |
Compared with TPS62171DSGR, TPS62160DRVR offers adjustability at reduced current capability, while TPS62825ADSGR delivers superior efficiency and current capacity in the same footprint - both require validation of loop stability and thermal performance in the target application.
Availability
TPS62171DSGR is available at Aetrix Electronics and suitable for mobile PCs, digital cameras, and industrial IoT nodes requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.
Supply support for TPS62171DSGR 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 TPS6217x family was designed specifically for high-power-density portable and battery-powered systems needing small-footprint, low-IQ, and fast-transient step-down regulation - targeting applications where board space and energy efficiency are critical constraints.
FAQ
What is the recommended input capacitor for TPS62171DSGR?
The TPS62171DSGR datasheet specifies a minimum 10 µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and PGND pins. A 1210-size 10 µF/25 V capacitor with ≤5 mΩ ESL is preferred to suppress high-frequency switching noise and ensure stable operation across the 3–17 V input range. Larger values (e.g., 22 µF) further reduce input ripple but are not required for basic functionality.
Does TPS62171DSGR support pre-biased output startup?
Yes, TPS62171DSGR supports monotonic pre-biased startup: during initial enable, the low-side MOSFET remains off until the internal ramp voltage exceeds the existing output voltage, preventing reverse current flow and ensuring controlled voltage rise. This behavior is confirmed in the device's functional description and startup timing diagrams in the SLVSAT8E datasheet.
What is the maximum achievable output current for TPS62171DSGR at 1.8 V output?
The TPS62171DSGR is rated for up to 500 mA continuous output current at 1.8 V, validated across –40°C to +125°C junction temperature with proper PCB thermal design (≥4 cm² 2-oz copper on top/bottom layers connected to the exposed thermal pad). Derating applies above +85°C ambient; full 500 mA is guaranteed only with adequate heatsinking per the RθJB = 15.5°C/W specification.
How does the power good (PG) signal behave during thermal shutdown?
During thermal shutdown, the TPS62171DSGR places the PG pin in high-impedance state - identical to its behavior during EN-driven shutdown or UVLO. This open-drain deactivation alerts the host system that regulation has been lost without asserting a false "good" or "bad" logic level, enabling safe system-level fault handling and graceful power-down sequences.
Can TPS62171DSGR operate with an input voltage below 3 V?
No - the absolute minimum input voltage for TPS62171DSGR is 3 V per the Recommended Operating Conditions table. Below this, undervoltage lockout (UVLO) activates at 2.7 V (typical) with 180 mV hysteresis, disabling switching and placing PG in high-impedance. Operation below 3 V risks unstable regulation, excessive dropout, or failure to maintain 1.8 V output, and is outside the qualified specification.
TPS62171DSGR 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):
- 1.8V
- 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)
TPS62171DSGR FAQ
1.How can I place an order for TPS62171DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62171DSGR 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 TPS62171DSGR reliable?
The price and inventory of TPS62171DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62171DSGR is usually 5 days.
3.What payment methods are accepted for TPS62171DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62171DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62171DSGR?
TPS62171DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62171DSGR 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 TPS62171DSGR?
For technical support, including TPS62171DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62171DSGR requirements.
6.How does Aetrix verify that TPS62171DSGR is sourced from the original manufacturer or authorized distributors?
All TPS62171DSGR 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 TPS62171DSGR meets industry standards.
7.What is the process for return or replacement of TPS62171DSGR?
All TPS62171DSGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62171DSGR, 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 TPS62171DSGR part is unused and in its original packaging.
Return procedure for TPS62171DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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