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Texas Instruments TPS62122DRVR
- Part No.:
- TPS62122DRVR
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS62122DRVR.pdf
- Description:
- IC REG BUCK ADJ 75MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:16,051
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Product details
Overview
TPS62122DRVR from Texas Instruments is a highly efficient synchronous step-down DC-DC converter optimized for ultra-low-power applications, supporting 2 V to 15 V input voltage, 1.2 V to 5.5 V adjustable output voltage, up to 75 mA output current, and achieving up to 96% efficiency at light loads in PFM mode - used in energy harvesting nodes and low-power RF sensor transceivers.
For engineers reviewing the TPS62122DRVR datasheet, TPS62122DRVR pinout, TPS62122DRVR application, or TPS62122DRVR equivalent, key selection criteria include its 11-µA quiescent current in power-save mode, 6-pin 2 mm × 2 mm DFN package with exposed thermal pad, absence of power-good and SGND discharge pins (distinguishing it from TPS62120), and compatibility with tiny external inductors (10–33 µH) and capacitors (1–33 µF).
Technical Context
The TPS62122DRVR employs an advanced hysteretic PFM/PWM control scheme that enables automatic transition between pulse frequency modulation (PFM) at light loads and quasi-fixed-frequency PWM at higher loads - maintaining high efficiency across the full 0–75 mA output range. Its internal 0.8-V reference and feedback comparator regulate output voltage via external resistor divider on the FB pin.
This device integrates synchronous high-side and low-side MOSFETs (RDS(ON) = 1.75 Ω / 1.2 Ω typical at 8 V), supports 100% duty-cycle operation for lowest dropout, and features undervoltage lockout (UVLO) with 2.5 V rising / 1.85 V falling thresholds. It lacks PG and SGND pins - confirmed by TI's device comparison table and pin configuration documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2 V to 15 V - enables direct use with single Li-ion, multi-cell alkaline, or harvested energy sources without pre-regulation. |
| Output Current | Up to 75 mA - sufficient for ultra-low-power microcontrollers (e.g., MSP430FR), RF transceivers (e.g., CC1101), and sensor signal chains. |
| Quiescent Current | 11 µA typical in PFM mode - extends battery life in always-on, intermittent-sensing applications like wireless sensor nodes. |
| Switching Frequency | Up to 800 kHz - allows use of compact 10–33 µH inductors and reduces output ripple without requiring large LC filters. |
| Output Voltage Range | 1.2 V to 5.5 V (adjustable via FB resistor divider) - supports core voltages for 1.8-V/2.5-V/3.3-V logic and analog peripherals. |
| Package | 6-pin SON (DRV), 2.00 mm × 2.00 mm with exposed thermal pad - enables high-density PCB layouts and improved thermal performance over SOT-23. |
| Shutdown Current | 0.3 µA typical - ensures near-zero leakage during system sleep states, critical for energy harvesting storage management. |
Pinout & Package
TPS62122DRVR is housed in a 6-pin SON (Small Outline No-lead) package, 2.00 mm × 2.00 mm body size, with an exposed thermal pad that must be connected to GND for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2–15 V DC; requires ≥4.7 µF ceramic input capacitor close to pin for stability and transient response. |
| GND | Ground reference | Main power ground; connects to PCB ground plane and exposed thermal pad for thermal conduction and noise immunity. |
| VOUT | Regulated output | Delivers adjustable DC output; requires ≥4.7 µF ceramic output capacitor with low ESR for ripple suppression. |
| SW | Switch node | Connects to inductor; carries high di/dt switching current - must be routed short and away from sensitive analog traces. |
| EN | Enable control | Active-high logic input; threshold 0.8–1.1 V (VIH), hysteresis prevents chatter; must be terminated, not floating. |
| FB | Feedback input | Monitors output via resistor divider; references internal 0.8-V bandgap - sets VOUT = 0.8 × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck topology | Eliminates need for external Schottky diode - improves efficiency by >10% vs. asynchronous designs at 10–50 mA loads. |
| Hysteretic PFM/PWM control | Enables seamless mode transition - maintains >90% efficiency from 10 µA to 75 mA load without external compensation. |
| 100% duty-cycle operation | Supports dropout as low as ~100 mV at 75 mA - extends usable battery life down to 2.0 V input in coin-cell applications. |
| Internal soft-start | Ramps VOUT at ~15 mV/µs - limits inrush current into output capacitor and prevents input voltage sag on weak sources. |
| Thermal shutdown protection | Triggers at 150°C junction temperature with 20°C hysteresis - safeguards against sustained overload or poor heatsinking. |
Applications
| Wireless Sensor Node Power | Energy Harvesting Interface |
|---|---|
|
Use Scenario: Battery- or vibration-harvested power supplies feeding sub-100-mA loads in industrial IoT sensors. IC Role / Device Role: Primary step-down regulator converting variable harvester output (3–12 V) to stable 1.8 V or 3.3 V for MCU and radio. Use Value: 11-µA quiescent current minimizes self-discharge of storage capacitors; wide VIN accommodates unregulated transducer outputs. |
Use Scenario: Electromagnetic or thermoelectric harvesters powering autonomous condition-monitoring devices. IC Role / Device Role: Efficient DC-DC stage stepping harvested microwatt-to-milliwatt energy to usable rail voltages. Use Value: 2-V startup capability and 96% peak efficiency enable operation even with low-output harvesters; no PG pin simplifies BOM. |
| Ultra-Low-Power MCU Supply | Low-Noise RF Subsystem Rail |
|
Use Scenario: Always-on, event-triggered microcontrollers (e.g., MSP430FR, nRF52832) in portable medical or asset trackers. IC Role / Device Role: Main VDD supply delivering regulated voltage during active and deep-sleep modes. Use Value: 0.3-µA shutdown current preserves battery during multi-week sleep intervals; soft-start prevents brownout on wake-up. |
Use Scenario: Local oscillator or LNA bias rails in sub-GHz or 2.4-GHz RF modules where supply noise impacts phase noise. IC Role / Device Role: Clean, low-ripple power source for RF analog blocks requiring minimal conducted EMI. Use Value: Low output ripple in PFM mode (<10 mVPP) and synchronous switching reduce spurious emissions vs. asynchronous converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Same 2–6 V input range, 300-mA output, 17-µA IQ, 2-mm × 2-mm WSON-6 package - but fixed 1.8-V or 3.3-V output only. | Not suitable for adjustable-output designs; better for higher-current, fixed-rail systems like wearables with PMIC integration. | Select when higher output current and fixed VOUT simplify design; avoid if adjustable regulation or >6 V input is required. |
| MAX17222ELT+T | 20-V input, 100-mA output, 300-nA IQ, 6-pin WLP - uses constant-on-time control, lower IQ but no 100% duty cycle. | Better for nanowatt-energy harvesting; lacks low-dropout capability - cannot regulate down to VIN − 100 mV. | Prefer for ultra-deep-sleep systems with <10-µA average current; choose TPS62122DRVR when dropout headroom and 15-V support are critical. |
Compared with TPS62122DRVR, TPS62231DRYR offers higher current but sacrifices adjustability and input range, while MAX17222ELT+T achieves lower quiescent current at the cost of dropout performance and control architecture - making TPS62122DRVR the balanced choice for 2–15 V, 75-mA, adjustable-rail applications demanding efficiency across load extremes.
Availability
TPS62122DRVR is available at Aetrix Electronics and suitable for energy harvesting interfaces, ultra-low-power MCU supplies, and low-noise RF subsystem rails requiring stable component supply, long-lifecycle assurance, and traceable sourcing for industrial and medical edge devices.
Supply support for TPS62122DRVR 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 ICs, with decades of expertise in high-efficiency DC-DC conversion and low-power system design.
The TPS6212x product line was designed specifically for energy-constrained applications - including battery-free sensor networks and portable instrumentation - where wide-input-voltage operation, nanoscale quiescent current, and minimal external components are essential.
FAQ
What is the minimum input voltage required for TPS62122DRVR to start switching?
The TPS62122DRVR requires a minimum input voltage of 2.5 V (rising UVLO threshold) to initiate switching after EN is asserted. It remains operational down to 1.85 V (falling UVLO threshold), enabling extended runtime from depleting batteries. Startup time from EN assertion to first switching pulse is typically 50 µs, per TI's SLVSAD5A datasheet Section 7.5.
Does TPS62122DRVR include a power-good (PG) output or output discharge function?
No, TPS62122DRVR does not include a power-good output or SGND discharge pin - these features are exclusive to the TPS62120 variant (SOT-23-8). The TPS62122DRVR omits both pins to reduce package size and cost, confirmed in TI's Device Comparison Table (Section 5) and Pin Functions table (Section 6), which lists "no" for POWER GOOD and ACTIVE DISCHARGE SWITCH.
What external components are mandatory for stable operation of TPS62122DRVR?
TPS62122DRVR requires four mandatory external components: a 4.7-µF ceramic input capacitor (CIN), a 4.7-µF ceramic output capacitor (COUT), a 22-µH power inductor (L), and a resistor divider (R1/R2) on the FB pin to set output voltage. An optional 22-pF feedforward capacitor (CFF) is recommended for optimal transient response, per TI Application Note SLVA428.
How does TPS62122DRVR achieve high efficiency at light loads?
TPS62122DRVR achieves up to 96% efficiency at light loads by entering pulse frequency modulation (PFM) mode, where it delivers single switching pulses followed by extended sleep periods - reducing quiescent current to 11 µA. During sleep, internal circuits are powered down while the output capacitor sustains the load, minimizing switching and gate-drive losses inherent in continuous PWM operation.
Can TPS62122DRVR operate with an input voltage equal to the desired output voltage?
Yes, TPS62122DRVR supports 100% duty-cycle operation, allowing it to maintain regulation even when VIN approaches VOUT - e.g., delivering 1.8 V from a 2.0-V input. This low-dropout capability is enabled by the synchronous architecture and internal control logic that maximizes high-side MOSFET on-time, extending usable battery voltage range in coin-cell and energy-harvesting applications.
TPS62122DRVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN 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):
- 2V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 75mA
- Frequency - Switching:
- Up to 800kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS62122DRVR FAQ
1.How can I place an order for TPS62122DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62122DRVR 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 TPS62122DRVR reliable?
The price and inventory of TPS62122DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62122DRVR is usually 5 days.
3.What payment methods are accepted for TPS62122DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62122DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62122DRVR?
TPS62122DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62122DRVR 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 TPS62122DRVR?
For technical support, including TPS62122DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62122DRVR requirements.
6.How does Aetrix verify that TPS62122DRVR is sourced from the original manufacturer or authorized distributors?
All TPS62122DRVR 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 TPS62122DRVR meets industry standards.
7.What is the process for return or replacement of TPS62122DRVR?
All TPS62122DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62122DRVR, 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 TPS62122DRVR part is unused and in its original packaging.
Return procedure for TPS62122DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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