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Texas Instruments TPS62161DSGR
- Part No.:
- TPS62161DSGR
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62161DSGR.pdf
- Description:
- IC REG BUCK 1.8V 1A 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
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Product details
Overview
TPS62161DSGR from Texas Instruments is a 3-V to 17-V, 1-A synchronous step-down DC/DC converter with DCS-Control™ topology, fixed 1.8-V output, and 2.25-MHz switching frequency. It delivers up to 1 A continuous output current in a 2.00 mm × 2.00 mm WSON-8 package and integrates power good (PG), undervoltage lockout, thermal shutdown, and seamless power save mode transition - deployed in Li-ion-powered mobile PCs and digital cameras.
For engineers reviewing the TPS62161DSGR datasheet, TPS62161DSGR pinout, TPS62161DSGR application, or TPS62161DSGR equivalent, key selection criteria include its fixed 1.8-V output, 17-µA quiescent current in power save mode, 8-pin WSON thermal pad layout, and compatibility with 2.2-µH inductors and 22-µF output capacitors for compact POL designs.
Technical Context
The TPS62161DSGR implements DCS-Control™ - a hybrid regulation architecture combining fast AC voltage feedback via direct comparator control with a stable DC error amplifier loop. This enables immediate transient response while maintaining ±3% initial output accuracy and <0.05%/A load regulation at 3.3 V.
It operates in PWM mode at ~2.25 MHz under medium/heavy loads and transitions seamlessly into power save mode at light loads, reducing switching frequency linearly while sustaining >85% efficiency down to 1 mA. Its 100% duty cycle capability supports input voltages as low as 15% above VOUT, enabling extended battery runtime in single-cell Li-ion systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports 12-V rails and 1–4 Li-ion cells without external pre-regulation. |
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors; optimized for core logic and I/O supply of low-voltage processors. |
| Max Output Current | 1 A continuous - sufficient for SoC cores, FPGAs, and image sensors in portable embedded systems. |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2 µH inductors and compact 22 µF ceramic output capacitors. |
| Quiescent Current | 17 µA (typ.) - maintains high light-load efficiency in always-on subsystems like camera standby or modem sleep modes. |
| Power Good Output | Open-drain PG with 92–98% VOUT threshold - provides reliable rail sequencing signal for multi-rail systems. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS62161DSGR uses an 8-pin WSON package (DSG) with 2.00 mm × 2.00 mm body size and exposed thermal pad soldered to AGND for enhanced thermal performance and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Carries high-frequency switch node return current; must be routed separately from AGND to minimize noise coupling. |
| VIN (Pin 2) | Main input supply | Accepts 3–17 V; requires local 10-µF ceramic capacitor placed near pin for high-frequency decoupling. |
| 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/PG circuits; must connect to system analog ground and thermal pad. |
| FB (Pin 5) | Feedback input | Internally tied to AGND for fixed-output versions; unused but must be shorted to AGND per datasheet for thermal optimization. |
| VOS (Pin 6) | Voltage sense input | Direct connection to output capacitor for precise DCS-Control™ loop sensing; improves load transient response. |
| SW (Pin 7) | Switch node | Connects to 2.2-µH inductor; carries high dv/dt switching waveform; requires tight layout and minimal trace area. |
| PG (Pin 8) | Power good open-drain | Signals VOUT regulation status; requires external pull-up resistor (e.g., 10 kΩ to 3.3 V) for proper logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast AC comparator-based transient response with DC error amplifier stability - achieves <10-µs recovery from 50% load step at 1.8 V. |
| Seamless power save mode | Automatic transition between PWM and PSM without output voltage glitch - maintains regulation across 1 mA to 1 A load range. |
| 100% duty cycle operation | Enables regulation down to VIN ≈ VOUT + 0.3 V - extends usable battery voltage range in single-cell Li-ion applications. |
| Integrated protection | Includes overcurrent (1.45–2.45 A limit), thermal shutdown (160°C), UVLO (2.7 V with 180 mV hysteresis), and short-circuit recovery. |
| Exposed thermal pad | Low-RθJC(bot) = 8.6°C/W - requires soldering to AGND plane for effective heat dissipation in high-current or high-ambient environments. |
Applications
| Mobile PC Core Supply | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powers CPU/GPU cores in ultra-thin notebooks and 2-in-1 tablets operating from single or dual Li-ion batteries. IC Role / Device Role / Timing Role: Primary POL regulator delivering stable 1.8-V core voltage with fast transient response to dynamic processor load changes. Use Value: DCS-Control™ enables sub-10-µs load-step recovery, preventing brownouts during burst-mode processing; 17-µA IQ extends battery life in idle states. | Use Scenario: Supplies image sensor analog and digital domains in DSLR and mirrorless cameras requiring low-noise, tightly regulated bias. IC Role / Device Role / Timing Role: Low-ripple 1.8-V source with minimized EMI impact on sensitive analog front-end circuitry. Use Value: 2.25-MHz fixed-frequency operation avoids interference with image sensor readout timing; <10-mVpp output ripple preserves SNR. |
| Industrial IoT Edge Node | Modem Baseband Power |
Use Scenario: Powers ARM Cortex-M7 microcontrollers and wireless transceivers in battery-operated smart sensors deployed in remote locations. IC Role / Device Role / Timing Role: High-efficiency primary DC/DC converter supporting wide input range (3–17 V) from diverse sources including solar harvesters and 12-V industrial rails. Use Value: 100% duty cycle mode sustains regulation down to 2.07 V input, maximizing energy extraction from aging batteries or low-light solar panels. | Use Scenario: Provides clean 1.8-V supply to LTE/5G baseband processors in cellular modems where RF sensitivity demands ultra-low noise. IC Role / Device Role / Timing Role: Compact, thermally robust POL solution with integrated PG for synchronized boot sequencing with RF transceiver. Use Value: Exposed thermal pad and 61.8°C/W RθJA enable full 1-A operation in sealed enclosures; PG signal coordinates modem initialization sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62160DSGR | Adjustable output (0.9–6 V) via external resistor divider; identical pinout, package, and specs otherwise. | Requires two external resistors; suitable when multiple output voltages are needed on same board. | Select TPS62160DSGR only if adjustable output is required; TPS62161DSGR saves BOM cost and layout space for fixed 1.8-V use. |
| TPS62170DSGR | Same DCS-Control™, 3–17 V input, but 0.4-A max output and 2-MHz switching; pin-compatible with TPS6216x family. | Limited to lower-power microcontrollers and peripherals; not suitable for 1-A loads like SoCs or sensors. | Choose TPS62170DSGR only for sub-400-mA applications where smaller solution size and lower IQ (12 µA) are prioritized over current capability. |
Compared with TPS62160DSGR and TPS62170DSGR, the TPS62161DSGR uniquely balances fixed 1.8-V simplicity, 1-A capability, and 2.25-MHz operation - making it optimal for space-constrained, battery-sensitive 1.8-V core supplies where external feedback components and derating are undesirable.
Availability
TPS62161DSGR is available at Aetrix Electronics and suitable for mobile PCs, digital cameras, industrial IoT edge nodes, and cellular modems requiring stable component supply and long-term production continuity.
Supply support for TPS62161DSGR 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 DC/DC converter innovation.
The TPS6216x product line was designed specifically for high-density point-of-load applications in portable and battery-powered systems - emphasizing small solution size, wide input range, and seamless light-load efficiency.
FAQ
What is the recommended inductor value for TPS62161DSGR in a typical 12-V-to-1.8-V design?
The TPS62161DSGR datasheet specifies a 2.2-µH inductor as the standard value for typical applications. This value balances peak current, ripple, and transient response while enabling compact layout with the device's 2.25-MHz switching frequency. Using 2.2 µH with a 100-mΩ DCR inductor ensures stable operation across the full 3–17-V input range and supports the full 1-A output current without saturation.
Does TPS62161DSGR require external feedback resistors for its 1.8-V output?
No, the TPS62161DSGR has a factory-trimmed internal feedback network for fixed 1.8-V output. Pin 5 (FB) must be connected directly to AGND per the datasheet to optimize thermal performance and ensure stable regulation - no external resistors are needed or permitted.
How does the power good (PG) pin of TPS62161DSGR behave during startup and fault conditions?
The PG pin of TPS62161DSGR is an open-drain output that goes high-impedance during shutdown (EN low), UVLO (VIN < 2.7 V), or thermal shutdown (TJ > 160°C). It asserts low when VOUT falls below 90% of nominal (1.62 V) and pulls high (via external pull-up) only after VOUT exceeds 95% (1.71 V) and remains stable - providing reliable sequencing for downstream logic.
Can TPS62161DSGR operate with input voltage below 3 V?
No - the absolute minimum input voltage for functional operation is 3 V per the Recommended Operating Conditions. Below this, undervoltage lockout activates at 2.7 V (with 180-mV hysteresis), disabling switching. The device cannot regulate at VIN < 3 V, even in 100% duty cycle mode, which only applies when VIN is ≥ ~2.07 V *but still within the 3–17-V operating range*.
What is the thermal pad connection requirement for TPS62161DSGR in the DSG package?
The exposed thermal pad of the TPS62161DSGR must be soldered to a dedicated AGND copper pour on the PCB. TI specifies this connection as mandatory for both thermal dissipation (RθJC(bot) = 8.6°C/W) and mechanical reliability. Leaving the pad unconnected or floating violates the device's thermal specifications and risks premature failure under 1-A load conditions.
TPS62161DSGR 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:
- 1A
- 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)
TPS62161DSGR FAQ
1.How can I place an order for TPS62161DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62161DSGR 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 TPS62161DSGR reliable?
The price and inventory of TPS62161DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62161DSGR is usually 5 days.
3.What payment methods are accepted for TPS62161DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62161DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62161DSGR?
TPS62161DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62161DSGR 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 TPS62161DSGR?
For technical support, including TPS62161DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62161DSGR requirements.
6.How does Aetrix verify that TPS62161DSGR is sourced from the original manufacturer or authorized distributors?
All TPS62161DSGR 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 TPS62161DSGR meets industry standards.
7.What is the process for return or replacement of TPS62161DSGR?
All TPS62161DSGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62161DSGR, 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 TPS62161DSGR part is unused and in its original packaging.
Return procedure for TPS62161DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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