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Texas Instruments TPS62161DSGT
- Part No.:
- TPS62161DSGT
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62161DSGT.pdf
- Description:
- IC REG BUCK 1.8V 1A 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:397
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Product details
Overview
TPS62161DSGT 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 integrated power MOSFETs. It delivers up to 1 A at 1.8 V from inputs as low as 3 V (enabling single-cell Li-ion operation) or as high as 17 V (supporting 12-V rail supplies), with typical 2.25-MHz switching for compact 2.2-µH inductor and 22-µF output capacitor designs.
For engineers reviewing the TPS62161DSGT datasheet, TPS62161DSGT pinout, TPS62161DSGT application, or TPS62161DSGT equivalent, key selection criteria include its 1.8-V fixed output, 8-pin WSON (2.0 mm × 2.0 mm) package with exposed thermal pad, power good (PG) open-drain output, seamless PWM-to-power-save mode transition, and 17-µA quiescent current in light-load operation.
Technical Context
The TPS62161DSGT implements DCS-Control™ - a hybrid regulation architecture combining fast AC voltage feedback via direct comparator control with stable DC voltage regulation through an internal error amplifier and compensation network. This enables immediate transient response while maintaining ±3% output accuracy across line and load variations.
Its functional block includes integrated high-side (300–600 mΩ) and low-side (120–200 mΩ) MOSFETs, undervoltage lockout (2.7 V threshold with 180-mV hysteresis), thermal shutdown (160°C), soft-start (25 mV/µs ramp), and 100% duty-cycle mode for ultra-low dropout operation near VIN ≈ VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single Li-ion (3.0–4.2 V), dual Li-ion, or standard 12-V intermediate bus without external pre-regulation. |
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors; optimized for core logic, FPGA I/O, or low-voltage microcontrollers. |
| Max Output Current | 1 A continuous - sufficient for SoC cores, DSPs, or multi-rail POL applications with margin for peak loads. |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2-µH inductors <2.5 mm height and reduces output ripple without large bulk capacitance. |
| Quiescent Current | 17 µA - sustains high efficiency down to µA-level loads in battery-powered sleep modes. |
| Power Good Output | Open-drain PG with 92–98% VOUT threshold - provides reliable sequencing signal for downstream processors or FPGAs. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS62161DSGT uses an 8-pin WSON package (DSG suffix) measuring 2.00 mm × 2.00 mm with exposed thermal pad soldered to AGND for optimal thermal performance (RθJA = 61.8°C/W). The package is RoHS-compliant and moisture-sensitive level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Carries high-frequency switch node return current; must be connected to local input/output capacitor ground plane. |
| VIN (Pin 2) | Main supply input | Accepts 3–17 V; requires 10-µF ceramic input capacitor placed within 3 mm of pin for EMI suppression. |
| EN (Pin 3) | Enable control input | Active-high logic (0.9 V threshold); internal 400-kΩ pull-down allows safe default-off behavior. |
| AGND (Pin 4) | Analog ground reference | Reference for FB/VOS/PG circuits; must be tied to PGND at single point near IC for noise immunity. |
| FB (Pin 5) | Feedback input | Internally connected to GND for fixed 1.8-V version; leaving unconnected avoids instability in adjustable variants. |
| VOS (Pin 6) | Voltage sense input | Direct connection to output capacitor; enables precise regulation by sensing true output voltage at load. |
| SW (Pin 7) | Switch node | Drives external 2.2-µH inductor; requires short, low-inductance trace to minimize ringing and EMI. |
| PG (Pin 8) | Power good indicator | Open-drain output requiring external pull-up (to ≤7 V); asserts high when VOUT reaches 92–98% of 1.8 V. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast AC comparator-based transient response with DC error amplifier stability - achieves <50-µs load-step recovery with <1% undershoot using only 22-µF output capacitance. |
| Seamless power save mode | Automatic transition from 2.25-MHz PWM to variable-frequency PSM below ~100 mA - maintains >85% efficiency from 10 µA to 1 A without audible switching noise. |
| 100% duty cycle operation | Enables regulation down to VIN = VOUT + IOUT × (RDS(on) + RL) - extends battery runtime in portable devices by minimizing dropout voltage. |
| Integrated protection | Includes overcurrent (1.45–2.45 A limit), thermal shutdown (160°C), UVLO (2.7 V), and short-circuit recovery - eliminates need for external fault-handling circuitry. |
| Small solution size | 2.0 mm × 2.0 mm WSON + 2.2-µH inductor + 22-µF output cap yields total footprint <12 mm² - ideal for space-constrained mobile and wearable designs. |
Applications
| Mobile PC Core Supply | Digital Still Camera Sensor Bias |
|---|---|
Use Scenario: Powers ARM Cortex-A series application processor core rails in ultrabooks and 2-in-1 tablets operating from single-cell Li-ion batteries (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary POL regulator delivering stable 1.8-V core voltage with fast dynamic response to CPU burst loads. Use Value: DCS-Control™ ensures <50-µs transient recovery and <1% output deviation, preventing processor crashes during DVFS transitions. | Use Scenario: Supplies image sensor analog bias voltage in DSLR and mirrorless cameras where low noise and fast startup are critical. IC Role / Device Role / Timing Role: Low-noise, low-ripple 1.8-V source with soft-start (25 mV/µs) to prevent sensor latch-up during power-on. Use Value: 17-µA quiescent current minimizes standby drain; 2.25-MHz switching avoids interference with image sensor clock domains. |
| Industrial IoT Edge Node | POS Terminal Secure Element |
Use Scenario: Powers wireless MCU and RF transceiver (BLE/Zigbee) in battery-operated industrial sensors deployed in remote locations. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling multi-year battery life via ultra-low IQ and seamless PSM. Use Value: 100% duty-cycle mode sustains regulation until battery drops to ~1.9 V, maximizing usable cell capacity. | Use Scenario: Provides tamper-resistant 1.8-V supply to secure element or smart card controller in payment terminals. IC Role / Device Role / Timing Role: Safety-monitored POL regulator with PG output confirming valid voltage before secure boot sequence. Use Value: Open-drain PG signal sequences secure element initialization and validates output integrity under fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62160DSGT | Adjustable output (0.9–6 V) via external resistor divider; same package, pinout, and specs otherwise. | Requires two external resistors; suitable when multiple output voltages are needed on same board. | Select TPS62160DSGT if flexibility in output voltage is required; TPS62161DSGT saves BOM cost and layout area for fixed 1.8-V use. |
| TPS62170DRCT | Same DCS-Control™, 3–17 V input, but 600-mA max output and 2-mm × 3-mm VSON package; no PG pin. | Lacks power good signaling and lower current rating limits use in 1-A applications like mobile CPUs. | Choose TPS62170DRCT only for space-constrained, sub-600-mA applications where PG is unnecessary. |
Compared with TPS62160DSGT, the TPS62161DSGT eliminates external feedback components and reduces solution size; compared with TPS62170DRCT, it delivers higher current and adds critical power sequencing capability via the PG pin - making it the optimal choice for 1.8-V, 1-A POL systems requiring reliability and compactness.
Availability
TPS62161DSGT is available at Aetrix Electronics and suitable for mobile PCs, digital still cameras, industrial IoT edge nodes, and POS terminal designs requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.
Supply support for TPS62161DSGT 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 TPS6216x product line was designed specifically for high-density point-of-load applications in portable and battery-powered systems, emphasizing ultra-small footprint, low quiescent current, and seamless light-load efficiency.
FAQ
What is the output voltage of the TPS62161DSGT?
The TPS62161DSGT has a fixed 1.8-V output voltage. Unlike the adjustable TPS62160 variant, it does not require external feedback resistors - the internal resistor divider sets the regulated output precisely at 1.8 V, simplifying design and reducing component count. This fixed output is confirmed in the Device Voltage Options table of the SLVSAM2E datasheet and applies exclusively to the TPS62161DSGT part number.
Does the TPS62161DSGT support power sequencing with other rails?
Yes, the TPS62161DSGT supports power sequencing via its enable (EN) and power good (PG) pins. EN accepts active-high logic control for turn-on timing coordination, while PG provides an open-drain output that goes high when VOUT reaches 92–98% of 1.8 V. When used with an external pull-up resistor, PG can drive the EN pin of downstream regulators to enforce strict startup order - a capability verified in the Pin Functions and Feature Description sections of the datasheet.
What package type and dimensions does the TPS62161DSGT use?
The TPS62161DSGT uses the DSG package: an 8-pin WSON (Wafer-Level Small Outline No-lead) measuring 2.00 mm × 2.00 mm with an exposed thermal pad. This package is distinct from the larger 3.00 mm × 3.00 mm VSSOP (DGK) used by other family members. The exposed pad must be soldered to AGND for thermal and electrical performance, and the full mechanical drawing is specified in the SLVSAM2E datasheet's Mechanical, Packaging, and Orderable Information section.
Can the TPS62161DSGT operate from a single Li-ion battery?
Yes, the TPS62161DSGT operates from input voltages as low as 3 V, making it fully compatible with single-cell Li-ion batteries (nominal 3.7 V, range 3.0–4.2 V). Its 100% duty-cycle mode maintains regulation even when VIN approaches 1.8 V plus IOUT × (RDS(on) + RL), extending usable battery capacity. This capability is explicitly validated in the Recommended Operating Conditions and Device Functional Modes sections of the datasheet.
What is the typical switching frequency of the TPS62161DSGT?
The TPS62161DSGT operates at a typical switching frequency of 2.25 MHz in PWM mode. This high frequency is enabled by the DCS-Control™ topology and allows the use of small 2.2-µH inductors and low-ESR ceramic capacitors, minimizing solution size and improving transient response. Frequency variation is controlled and depends on input voltage, output voltage, and inductance - all detailed in the Electrical Characteristics and Detailed Description sections of the SLVSAM2E datasheet.
TPS62161DSGT 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)
TPS62161DSGT FAQ
1.How can I place an order for TPS62161DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62161DSGT 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 TPS62161DSGT reliable?
The price and inventory of TPS62161DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62161DSGT is usually 5 days.
3.What payment methods are accepted for TPS62161DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62161DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62161DSGT?
TPS62161DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62161DSGT 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 TPS62161DSGT?
For technical support, including TPS62161DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62161DSGT requirements.
6.How does Aetrix verify that TPS62161DSGT is sourced from the original manufacturer or authorized distributors?
All TPS62161DSGT 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 TPS62161DSGT meets industry standards.
7.What is the process for return or replacement of TPS62161DSGT?
All TPS62161DSGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62161DSGT, 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 TPS62161DSGT part is unused and in its original packaging.
Return procedure for TPS62161DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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