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Texas Instruments TPS62170DSGR
- Part No.:
- TPS62170DSGR
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62170DSGR.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:7,937
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Product details
Overview
TPS62170DSGR from Texas Instruments is an adjustable-output synchronous step-down DC-DC converter optimized for high-power-density applications. It operates from 3 V to 17 V input, delivers up to 500 mA continuous output current, regulates output voltage from 0.9 V to 6 V via external feedback divider, and features DCS-Control™ topology for fast transient response and high accuracy-used in battery-powered embedded systems and POL supplies.
For engineers reviewing the TPS62170DSGR datasheet, TPS62170DSGR pinout, TPS62170DSGR application, or TPS62170DSGR equivalent, key selection criteria include its 2.25-MHz switching frequency, 17-µA quiescent current in power save mode, 8-pin WSON package with exposed thermal pad, integrated power good (PG) output, and seamless PWM-to-power-save mode transition under light loads.
Technical Context
The TPS62170DSGR implements DCS-Control™ topology-a hybrid regulation scheme combining direct output-voltage sensing with a fast comparator and internal voltage feedback loop. This enables stable operation with low-ESR ceramic capacitors and small inductors (e.g., 2.2 µH), while maintaining tight DC regulation and sub-100-mV load transients.
It supports three functional modes: PWM mode (2.25 MHz nominal, CCM), power save mode (frequency scaling down with load), and 100% duty-cycle operation below VIN ≈ 1.15×VOUT. Control logic includes undervoltage lockout (2.7 V threshold, 180 mV hysteresis), thermal shutdown (160°C trip), and open-drain PG with programmable threshold (92–98% of VOUT).
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 Voltage Range | 0.9 V to 6 V - adjustable via external resistor divider; FB pin regulated to 0.8 V reference. |
| Max Output Current | 500 mA - sustained continuous output with internal MOSFETs (HS RDS(on) = 300–600 mΩ, LS = 120–200 mΩ). |
| Switching Frequency | Typ. 2.25 MHz - enables use of compact 2.2-µH inductors and <22-µF output capacitance for space-constrained designs. |
| Quiescent Current | 17 µA (typ.) - maintains high efficiency down to microamp-level loads via automatic power save mode entry. |
| Power Good Output | Open-drain PG with 92–98% rising threshold - provides reliable rail sequencing signal without external monitoring circuitry. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS62170DSGR is housed in a thermally enhanced 2-mm × 2-mm 8-pin WSON package (DSG) with an exposed thermal pad that must be 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; separate from AGND to minimize noise coupling into feedback path. |
| VIN (Pin 2) | Main input supply | Accepts 3–17 V; connects to input capacitor bank; internal UVLO (2.7 V) disables operation below threshold. |
| EN (Pin 3) | Enable control input | Active-high logic; internal 400-kΩ pull-down ensures safe default-off state; enables precise power-rail sequencing. |
| AGND (Pin 4) | Analog ground reference | Reference for FB, VOS, and internal error amplifier; must be connected to PGND at single point near IC for stability. |
| FB (Pin 5) | Feedback input | Regulated to 0.8 V; connects to resistive divider from VOUT to AGND to set output voltage (0.9–6 V range). |
| VOS (Pin 6) | Output voltage sense | Direct connection to output rail; used by DCS-Control™ loop for fast transient response and accurate DC regulation. |
| SW (Pin 7) | Switch node | Connects to inductor; carries high dv/dt switching waveform; requires short, low-inductance layout to minimize EMI. |
| PG (Pin 8) | Power good indicator | Open-drain output; requires external pull-up; asserts high when VOUT reaches 92–98% of target; high-impedance during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast comparator-based AC response with voltage-mode DC regulation-enables <10-µs load transient recovery with ±1% output accuracy. |
| Seamless power save mode | Automatic transition from 2.25-MHz PWM to variable-frequency PSM at light loads-maintains >85% efficiency down to 100 µA output current. |
| 100% duty-cycle operation | Enables regulation when VIN drops within ~15% of VOUT-extends battery runtime in portable devices without dropout voltage penalty. |
| Integrated protection | Includes overcurrent limiting (0.85–1.35 A), thermal shutdown (160°C), UVLO (2.7 V), and short-circuit recovery-eliminates need for external fault management. |
| Small solution size | Supports 2.2-µH inductor and 10–22-µF ceramic output capacitors-achieves full 500-mA capability in <15 mm² board area including passives. |
Applications
| Li-Ion Powered Portable Devices | POL Supply for Embedded Processors |
|---|---|
|
Use Scenario: Powering ARM Cortex-M microcontrollers or FPGA I/O banks from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V or 1.8 V at up to 500 mA with dynamic load handling during wake/sleep transitions. Use Value: 17-µA quiescent current extends battery life in sleep mode; DCS-Control™ ensures <50-mV undershoot during 100-mA load steps. |
Use Scenario: Point-of-load conversion from 5-V or 12-V system rail to 1.2-V core voltage for low-power SoCs. IC Role / Device Role / Timing Role: High-efficiency, fast-response POL regulator supporting burst-mode CPU activity and deep-sleep states. Use Value: 2.25-MHz switching allows tiny 2.2-µH inductor; 100% duty cycle sustains regulation as input decays from 5 V to 1.4 V. |
| LDO Replacement in Industrial Sensors | Digital Camera Power Management |
|
Use Scenario: Replacing inefficient linear regulators in battery-operated temperature/humidity sensor nodes. IC Role / Device Role / Timing Role: Efficient 3.3-V supply enabling >1-year battery life; PG signal triggers MCU wake on valid rail. Use Value: 85%+ efficiency at 10-mA load vs. <20% for LDO at 12-V input; PG output eliminates need for external supervisor IC. |
Use Scenario: Dual-rail generation (3.3 V for logic, 1.8 V for image sensor) in compact digital still cameras. IC Role / Device Role / Timing Role: Adjustable buck converter configured for multiple fixed outputs via resistor networks; SW node synchronized to avoid beat frequencies. Use Value: Low output ripple (<10 mVpp) prevents image noise; small WSON package fits tight camera module layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62171DSGR | Fixed 1.8-V output; identical pinout, package, and DCS-Control™ architecture; no FB resistor network required. | Simplifies BOM and layout for 1.8-V-only systems; eliminates feedback divider but loses adjustability. | Select when output voltage is fixed and board space for resistors is constrained. |
| TPS62160DRVR | Same 3–17-V input, 500-mA output, and 2.25-MHz DCS-Control™; uses 6-pin SOT-23 package instead of 8-pin WSON. | Smaller footprint but higher thermal resistance (RθJA = 160°C/W vs. 61.8°C/W); lacks PG pin and VOS sense. | Choose for ultra-compact designs where PG signaling and thermal performance are secondary. |
Compared with TPS62170DSGR, TPS62171DSGR removes design flexibility but reduces component count for fixed 1.8-V use, while TPS62160DRVR trades thermal capability and feature completeness for minimal footprint-making TPS62170DSGR optimal for balanced performance, adjustability, and thermal robustness in space-constrained industrial and portable systems.
Availability
TPS62170DSGR is available at Aetrix Electronics and suitable for Li-ion battery-powered devices, point-of-load (POL) converters in embedded processors, and industrial sensor nodes requiring stable component supply across long production lifecycles.
Supply support for TPS62170DSGR 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 product line was designed specifically for high-power-density, battery-sensitive applications-delivering fast transient response, ultra-low quiescent current, and seamless mode transitions in miniature packages.
FAQ
What is the minimum input voltage required for TPS62170DSGR to regulate a 1.8-V output?
The TPS62170DSGR maintains regulation down to approximately 1.8 V × 1.15 = 2.07 V due to its 100% duty-cycle capability, but its undervoltage lockout activates at 2.6–2.82 V. Therefore, stable 1.8-V output requires VIN ≥ 2.82 V. Below this, the device shuts down and cannot sustain regulation-even though the 100% mode would theoretically allow lower input. The TPS62170DSGR datasheet specifies 3 V as the absolute minimum recommended operating input voltage.
How does the TPS62170DSGR achieve seamless transition between PWM and power save modes?
The TPS62170DSGR uses DCS-Control™ topology, which integrates a fast comparator monitoring output voltage ripple with a slower voltage feedback loop. As load decreases, the comparator detects reduced ripple amplitude and gradually lowers switching frequency without disrupting regulation-no mode-change artifacts appear on VOUT. This occurs automatically at the boundary between continuous and discontinuous conduction, eliminating output voltage glitches common in dual-mode controllers.
Can the TPS62170DSGR start up into a pre-biased output voltage?
Yes, the TPS62170DSGR supports monotonic pre-biased startup. Its internal soft-start circuit prevents reverse current flow by holding the low-side MOSFET off until the internal ramp voltage exceeds the existing output voltage. This avoids discharging the pre-biased rail and ensures controlled, non-destructive startup-critical in systems with multiple sequenced rails or backup capacitors.
What is the purpose of the VOS pin on the TPS62170DSGR, and how should it be connected?
The VOS (voltage output sense) pin on the TPS62170DSGR provides a dedicated, low-impedance connection point directly to the output capacitor for the DCS-Control™ loop. It must be connected to the same net as the output voltage-ideally at the capacitor's positive terminal-to enable fast transient response and accurate DC regulation. Unlike FB, VOS is not a feedback node but a sensing point; routing it separately from noisy SW or PG traces preserves loop stability.
Does the TPS62170DSGR require external compensation components?
No, the TPS62170DSGR uses internally compensated DCS-Control™ architecture and requires no external compensation components. Its stability is guaranteed with standard ceramic output capacitors (10–22 µF, low ESR) and a 2.2-µH inductor. The integrated compensation eliminates design iteration time and layout sensitivity-unlike traditional voltage-mode or current-mode buck controllers that demand careful RC network tuning.
TPS62170DSGR 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)
TPS62170DSGR FAQ
1.How can I place an order for TPS62170DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62170DSGR 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 TPS62170DSGR reliable?
The price and inventory of TPS62170DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62170DSGR is usually 5 days.
3.What payment methods are accepted for TPS62170DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62170DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62170DSGR?
TPS62170DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62170DSGR 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 TPS62170DSGR?
For technical support, including TPS62170DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62170DSGR requirements.
6.How does Aetrix verify that TPS62170DSGR is sourced from the original manufacturer or authorized distributors?
All TPS62170DSGR 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 TPS62170DSGR meets industry standards.
7.What is the process for return or replacement of TPS62170DSGR?
All TPS62170DSGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62170DSGR, 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 TPS62170DSGR part is unused and in its original packaging.
Return procedure for TPS62170DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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