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Texas Instruments TPS62170DSGT
- Part No.:
- TPS62170DSGT
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62170DSGT.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
TPS62170DSGT from Texas Instruments is a synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 3 V to 17 V input and delivering up to 0.5 A at adjustable output voltages from 0.9 V to 6 V. It features 2.25 MHz switching frequency, 17 µA quiescent current in power save mode, and integrated power good (PG) output. It is used in battery-powered embedded systems requiring compact, high-efficiency POL regulation.
For engineers reviewing the TPS62170DSGT datasheet, TPS62170DSGT pinout, TPS62170DSGT application, or TPS62170DSGT equivalent, key selection considerations include its 8-pin WSON package, seamless PWM-to-power-save transition, 100% duty cycle capability for low VIN–VOUT differentials, and compatibility with small external components (e.g., 2.2 µH inductor, 10–22 µF output capacitor).
Technical Context
The TPS62170DSGT 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 feedback loop. Its fixed on-time control enables consistent 2.25 MHz operation under steady-state PWM mode while enabling linear frequency scaling in power save mode.
It integrates high-side and low-side MOSFETs with RDS(on) of 300 mΩ (HS) and 120 mΩ (LS) at VIN ≥6 V, supports soft-start (25 mV/µs ramp), undervoltage lockout (2.7 V threshold with 180 mV hysteresis), thermal shutdown (160°C), and open-drain PG signaling with 92–98% rising threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single/dual Li-ion batteries and standard 12-V intermediate rails without external pre-regulation. |
| Output Current | Up to 0.5 A continuous - sufficient for microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2 µH inductors and <22 µF ceramic output capacitors, minimizing solution footprint. |
| Quiescent Current | 17 µA (typ.) - maintains high light-load efficiency in always-on or low-duty-cycle applications like IoT endpoints. |
| Output Voltage Range | 0.9 V to 6 V (adjustable) - set via external resistor divider on FB pin; internal reference is 0.8 V. |
| Power Good Output | Open-drain PG with 92–98% rising threshold - enables reliable power sequencing with other rails or processors. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
TPS62170DSGT 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Low-impedance path for high-current switch node return; must be connected to local power ground plane. |
| VIN (Pin 2) | Main input supply | Accepts 3–17 V; requires local 10-µF ceramic bypass capacitor near pin for stability and EMI suppression. |
| EN (Pin 3) | Enable control input | Active-high logic; internal 400-kΩ pull-down allows safe default-off behavior; supports rail sequencing. |
| AGND (Pin 4) | Analog ground reference | Reference for FB, VOS, and internal control circuitry; must be tied to PGND at single point near device. |
| FB (Pin 5) | Feedback input | Senses output voltage via resistive divider; regulated to 0.8 V; determines final VOUT in adjustable configuration. |
| VOS (Pin 6) | Voltage sense input | Connects directly to output capacitor for accurate regulation; improves load transient response and line regulation. |
| SW (Pin 7) | Switch node | Drives external inductor; carries high di/dt; requires short, low-inductance layout to minimize ringing and EMI. |
| PG (Pin 8) | Power good indicator | Open-drain output; requires external pull-up (to ≤7 V); signals VOUT within ±3% of target after soft-start completion. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast transient response (<10 µs recovery) with tight DC accuracy (±3% initial VOUT tolerance) using single-loop architecture. |
| Seamless power save mode | Automatic transition between PWM and PSM without output voltage glitch or audible noise - critical for battery life in portable devices. |
| 100% duty cycle operation | Maintains regulation down to VIN ≈ VOUT + IOUT×(RDS(on) + RL); extends runtime in deep discharge battery conditions. |
| Integrated protection | Includes overcurrent (0.85–1.35 A limit), thermal shutdown (160°C), UVLO (2.7 V), and short-circuit recovery - reduces need for external fault management. |
| Small solution size | Supports total BOM footprint <15 mm² with 2.2 µH inductor and 10–22 µF X5R/X7R ceramics - ideal for wearables and compact modules. |
Applications
| Mobile PC Core Rail | Digital Still Camera Sensor Supply |
|---|---|
Use Scenario: Powers ARM-based application processor core (e.g., Cortex-A series) from single-cell Li-ion battery (3.0–4.2 V) with dynamic voltage scaling. IC Role / Device Role / Timing Role: Primary POL regulator delivering 1.0–1.2 V at up to 0.5 A; manages rapid load transients during CPU burst activity. Use Value: 2.25 MHz switching and DCS-Control™ ensure <10 mV undershoot during 100 mA–500 mA load steps, avoiding processor reset. | Use Scenario: Supplies image sensor analog and digital domains in DSLR or mirrorless camera, where clean, low-noise power is essential. IC Role / Device Role / Timing Role: Dual-rail generator (via two TPS62170DSGTs) providing isolated 2.8 V (analog) and 1.8 V (digital) from shared 3.7 V battery. Use Value: Ultra-low 17 µA quiescent current preserves standby time; PG outputs coordinate sensor initialization sequence with FPGA. |
| Industrial IoT Edge Node | Modem Baseband Power |
Use Scenario: Powers LoRaWAN or NB-IoT modem SoC in battery-operated remote sensor node with 10-year lifetime target. IC Role / Device Role / Timing Role: Main system regulator converting 3.6 V primary battery to 3.3 V for MCU, radio, and peripherals; enters deep sleep with EN controlled by RTC. Use Value: 1.5 µA shutdown current and seamless PSM enable >95% average efficiency across 1 µA–500 mA load range. | Use Scenario: Replaces inefficient LDO in 4G LTE modem module, supplying 1.2 V core voltage from 3.8 V battery pack. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting burst-mode transmission (peak 400 mA) and ultra-low-idle states (10 µA). Use Value: 100% duty cycle mode sustains regulation down to 1.25 V input, extending usable battery voltage range by ~15% vs. conventional buck. |
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 1.8 V output; identical pinout, package, and DCS-Control™ architecture; no FB/VOS divider required. | Eliminates external resistor network but lacks output voltage flexibility; suited for dedicated 1.8 V rails only. | Select when fixed 1.8 V simplifies BOM and layout; verify system VOUT tolerance aligns with ±3% spec. |
| TPS62160DRVR | Same 3–17 V input, 0.5 A rating, and 2.25 MHz frequency; uses different control scheme (DCS-Control™ not specified); 6-pin WSON package. | Smaller package (2 × 2 mm, 6-pin) but lacks PG output and 100% duty cycle mode; lower integration. | Choose for minimal footprint where PG and deep-dropout operation are non-critical; confirm thermal performance with RθJA = 72.5°C/W. |
Compared with TPS62171DSGT, the TPS62170DSGT offers full output adjustability at the cost of two external resistors; compared with TPS62160DRVR, it adds PG signaling, thermal/UVLO protection granularity, and guaranteed 100% duty cycle - making it preferable for safety-aware or battery-extending designs.
Availability
TPS62170DSGT is available at Aetrix Electronics and suitable for mobile PCs, digital still cameras, industrial IoT edge nodes, and modem baseband power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS62170DSGT 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 TPS6217x product line was designed specifically for high-power-density point-of-load applications in portable and battery-powered systems, emphasizing ultra-small footprint, wide input range, and seamless light-load efficiency.
FAQ
What is the minimum input voltage required for TPS62170DSGT to maintain regulation at 1.2 V output?
The TPS62170DSGT supports 100% duty cycle operation, allowing regulation down to VIN ≈ VOUT + IOUT × (RDS(on) + RL). At 1.2 V output and 0.5 A load, with typical RDS(on) = 300 mΩ and 20 mΩ inductor DCR, minimum VIN is ~1.37 V. However, UVLO disables operation below 2.6 V, so practical minimum is 2.6 V - verified in the TPS62170DSGT datasheet Section 7.5.
Can TPS62170DSGT operate with a 10 µF output capacitor, or is 22 µF mandatory?
The TPS62170DSGT is stable with either 10 µF or 22 µF ceramic output capacitors, as confirmed in the datasheet's Typical Application (Figure 7) and Electrical Characteristics table. 10 µF meets minimum stability requirements; 22 µF improves transient response and reduces output ripple - both values are validated for use with the TPS62170DSGT in production designs.
Does TPS62170DSGT require an external resistor divider on the FB pin for all applications?
Yes - the TPS62170DSGT is the adjustable version of the family and requires an external resistor divider from VOUT to AGND to set the output voltage. The FB pin is internally regulated to 0.8 V, so R1/R2 values determine VOUT per VOUT = 0.8 V × (1 + R1/R2). Fixed-output variants (e.g., TPS62171DSGT) omit this requirement.
How does the power good (PG) signal behave during startup and fault conditions for TPS62170DSGT?
The TPS62170DSGT PG pin is open-drain and goes high-impedance during shutdown (EN low), UVLO (VIN < 2.6 V), or thermal shutdown (TJ > 160°C). During normal startup, PG transitions high when VOUT reaches 92–98% of target and remains high until regulation is lost. A pull-up resistor (typically 10–100 kΩ to ≤7 V) is mandatory for proper logic-level signaling.
Is TPS62170DSGT pin-compatible with TPS62160DRVR, and can they be interchanged on the same PCB?
No - TPS62170DSGT uses an 8-pin WSON package with PG, VOS, FB, and AGND pins, while TPS62160DRVR uses a 6-pin WSON package without PG or VOS. Pin count, pin functions, and footprint differ; they are not mechanically or electrically interchangeable. Board redesign is required to substitute TPS62160DRVR for TPS62170DSGT.
TPS62170DSGT 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 6V
- 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)
TPS62170DSGT FAQ
1.How can I place an order for TPS62170DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62170DSGT 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 TPS62170DSGT reliable?
The price and inventory of TPS62170DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62170DSGT is usually 5 days.
3.What payment methods are accepted for TPS62170DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62170DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62170DSGT?
TPS62170DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62170DSGT 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 TPS62170DSGT?
For technical support, including TPS62170DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62170DSGT requirements.
6.How does Aetrix verify that TPS62170DSGT is sourced from the original manufacturer or authorized distributors?
All TPS62170DSGT 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 TPS62170DSGT meets industry standards.
7.What is the process for return or replacement of TPS62170DSGT?
All TPS62170DSGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62170DSGT, 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 TPS62170DSGT part is unused and in its original packaging.
Return procedure for TPS62170DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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