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Texas Instruments TPS622311DRYT
- Part No.:
- TPS622311DRYT
- Manufacturer:
- Texas Instruments
- Package:
- 6-UFDFN
- Datasheet:
-
TPS622311DRYT.pdf
- Description:
- IC REG BUCK 1.1V 500MA 6SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
TPS622311DRYT from Texas Instruments is a 2-MHz synchronous step-down DC-DC converter in a 1 mm × 1.5 mm USON-6 package, delivering up to 500 mA output current with fixed 1.1 V output voltage, 2.05 V to 6 V input range, and 22 μA quiescent current in power-save mode. It serves as an ultra-compact, high-efficiency replacement for LDOs in space-constrained portable audio and low-power wireless systems.
For engineers reviewing the TPS622311DRYT datasheet, TPS622311DRYT pinout, TPS622311DRYT application, or TPS622311DRYT equivalent, key selection criteria include its 1.1 V fixed output, 2 MHz switching frequency, 6-pin USON thermal performance (RθJA = 294.5°C/W), forced-PWM capability via MODE pin, and compatibility with 2.2 μH inductors and 4.7 μF output capacitors in sub-12 mm² layouts.
Technical Context
The TPS622311DRYT implements a hysteretic PWM controller topology enabling stable 2 MHz operation with excellent AC load regulation and low output ripple-even at light loads-via optimized power-save mode that skips pulses while maintaining >90 dB PSRR. Its internal 0.7 V reference and resistor-free FB pin support precise 1.1 V regulation without external dividers.
It integrates high-side (600–850 mΩ) and low-side (350–480 mΩ) MOSFETs, features undervoltage lockout (1.8 V falling threshold), thermal shutdown at 150°C, and soft-start with ~100 μs startup time. The MODE pin selects between automatic PFM/PWM transition (MODE = GND) or forced continuous PWM (MODE = VIN) for noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.1 V - eliminates need for external feedback resistors; ensures stable core supply for low-voltage DSPs and RF ICs. |
| Switching Frequency | 2 MHz - enables use of small 2.2 μH inductors and compact 4.7 μF ceramic output capacitors; supports <12 mm² total solution size. |
| Max Output Current | 500 mA - sufficient for powering single-core microcontrollers, Bluetooth SoCs, or camera sensor interfaces under typical battery conditions. |
| Input Voltage Range | 2.05 V to 6 V - supports single Li-ion (2.7–4.2 V), Li-primary, or dual alkaline cells without dropout issues. |
| Quiescent Current | 22 μA (PFM mode) - extends battery life in always-on sensor nodes or standby audio subsystems. |
| Efficiency | Up to 94% - reduces thermal load in sealed enclosures and improves runtime versus linear regulators. |
| Operating Temperature | –40°C to 125°C junction - qualified for industrial and automotive cabin ambient environments. |
Pinout & Package
TPS622311DRYT is housed in a 1 mm × 1.5 mm × 0.6 mm, 6-pin USON (DRY) package with wettable flanks for automated optical inspection. Thermal resistance is RθJA = 294.5°C/W (JEDEC standard PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE | Mode control input | Pull to GND for automatic PFM/PWM transition; pull to VIN for forced PWM across full load range - critical for EMI-sensitive RF sections. |
| SW | Power switch node | Connects to external 2.2 μH inductor; carries high-frequency switching current - requires short, low-inductance layout to minimize ringing. |
| VIN | Main power input | Accepts 2.05–6 V; must be decoupled with ≥2.2 μF X5R/X7R ceramic capacitor placed adjacent to pin 3. |
| FB | Feedback input | Direct connection to output capacitor - no external resistor divider needed due to internal 1.1 V reference (0.7 V × 1.571). |
| EN | Enable input | Active-high logic; must be terminated (no internal pull-up/down); pulling low disables converter and reduces current to <1 μA. |
| GND | Power ground | Primary return path for high-current switching loop; requires solid thermal pad connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small solution size | ≤12 mm² PCB area with 2.2 μH inductor and 4.7 μF output capacitor - fits within footprint of many 0603/0805 passives. |
| High PSRR | Up to 90 dB at 100 kHz - suppresses noise from noisy battery rails or shared DC-DC sources feeding analog/RF circuits. |
| 100% duty cycle operation | Enables lowest possible dropout - maintains regulation even when VIN drops to within ~100 mV of VOUT (e.g., 1.2 V → 1.1 V). |
| Optimized power-save mode | Delivers <10 mVPP output ripple at 100 μA load using only 2.2 μH/4.7 μF - avoids audible coil whine in portable media devices. |
| Integrated soft-start | ~100 μs monotonic ramp - prevents inrush current spikes into pre-biased outputs and avoids brownout on weak battery sources. |
Applications
| Portable Audio Playback | Bluetooth Low Energy Node |
|---|---|
Use Scenario: Powering DAC, headphone amplifier, and codec in compact wireless earbuds with single Li-ion cell. IC Role / Device Role: Primary 1.1 V core supply for audio SoC; replaces inefficient LDO to extend playback time. Use Value: 94% efficiency at 200 mA and 22 μA quiescent current in standby enable >8-hour battery life and eliminate thermal derating in sealed housing. | Use Scenario: Supplying BLE 5.0 transceiver and ARM Cortex-M0+ MCU in coin-cell–powered sensor tag. IC Role / Device Role: Main 1.1 V rail for digital core and radio PHY; operates down to 2.05 V input during battery depletion. Use Value: 2 MHz switching allows use of miniature 1.0×0.5 mm inductors; 12 mm² total solution fits within 12×16 mm PCB constraint. |
| Digital Camera Sensor Interface | Industrial IoT Edge Controller |
Use Scenario: Providing clean 1.1 V supply to CMOS image sensor and ISP in action camera module. IC Role / Device Role: Low-noise, high-PSRR power stage placed near sensor die to minimize switching noise coupling into analog pixel paths. Use Value: Forced PWM mode (MODE = VIN) eliminates PFM frequency variation, ensuring predictable EMI filtering and meeting CISPR-22 Class B limits. | Use Scenario: Powering real-time MCU, isolated RS-485 transceiver, and temperature sensor in DIN-rail mounted condition monitor. IC Role / Device Role: Secondary 1.1 V rail derived from 3.3 V system bus; handles transient loads from burst-mode wireless transmission. Use Value: –40°C to 125°C operation and 150°C thermal shutdown ensure reliability in unventilated enclosures; 294.5°C/W RθJA validated on 2-layer 1 oz Cu board. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 3 MHz switching frequency; 1.8 V fixed output; identical package and pinout. | Targets higher-voltage DSP cores or I/O rails instead of 1.1 V logic cores. | Select when system requires 1.8 V with same layout and thermal profile - no PCB change needed. |
| TPS62235DRYT | 2 MHz switching; 1.2 V fixed output; same USON-6 package and functional pinout. | Suitable for slightly higher-voltage FPGA I/O banks or mixed-signal ASICs requiring 1.2 V ±2.5%. | Choose for 1.2 V applications where tighter initial accuracy (±2%) and same 22 μA IQ are required - pin-compatible drop-in. |
Compared with TPS622311DRYT, TPS62231DRYT delivers higher output voltage at 3 MHz for faster transient response in 1.8 V domains, while TPS62235DRYT offers 1.2 V with identical 2 MHz timing and thermal behavior - both share the same 1 mm × 1.5 mm footprint and MODE/EN/SW/FB/GND/VIN pin mapping for seamless redesign reuse.
Availability
TPS622311DRYT is available at Aetrix Electronics and suitable for portable audio playback, Bluetooth Low Energy nodes, and digital camera sensor interfaces requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS622311DRYT 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 company specializing in analog, embedded processing, and power management technologies, with over 50 years of leadership in high-reliability power conversion solutions.
The TPS6223x product line was designed specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered portable electronics - emphasizing minimal solution size, low IQ, and robust performance across wide input voltage and temperature ranges.
FAQ
What is the exact output voltage tolerance of the TPS622311DRYT over temperature?
The TPS622311DRYT guarantees ±2.5% output voltage accuracy over the full –40°C to 125°C junction temperature range, with ±2% accuracy at 25°C. This is achieved via an internal 0.7 V reference and precision trimming - no external components affect this tolerance since the 1.1 V output is fixed and resistorless. The TPS622311DRYT maintains this specification under all recommended operating conditions including 2.05–6 V input and 0–500 mA load.
Can the TPS622311DRYT operate with an input voltage below 2.05 V?
No - the TPS622311DRYT has a hard undervoltage lockout (UVLO) threshold with a falling edge at 1.8 V (typical) and rising edge at 1.9–2.05 V. Below 2.05 V input, the device will not start up; once running, it continues until VIN falls below the 1.8 V UVLO threshold. The minimum functional input is therefore 2.05 V per TI's recommended operating conditions - attempting operation below this risks erratic behavior or shutdown. The TPS622311DRYT is not rated for sub-2.05 V operation.
Does the TPS622311DRYT require an external feedback resistor network?
No - the TPS622311DRYT uses an internal resistor divider tied to a 0.7 V reference to generate its fixed 1.1 V output. The FB pin connects directly to the output capacitor with no external resistors. This eliminates tuning error, saves board space, and improves long-term stability. All variants in the TPS6223x family, including the TPS622311DRYT, implement fixed-output versions exclusively - no adjustable configurations exist in this series.
What is the maximum allowable PCB trace length between the TPS622311DRYT SW pin and the inductor?
Texas Instruments recommends keeping the SW-to-inductor trace as short and wide as possible - ideally ≤2 mm in length and ≥0.3 mm wide - to minimize parasitic inductance and reduce high-frequency ringing. Longer traces increase EMI and can cause instability or MOSFET stress. Layout guidelines in the TPS622311DRYT datasheet specify that the entire high-current loop (VIN → SW → L → VOUT → GND → VIN) must be minimized, with the SW node routed over solid ground plane. Exceeding 3 mm significantly degrades efficiency and EMC performance of the TPS622311DRYT.
Is the TPS622311DRYT RoHS-compliant and lead-free?
Yes - the TPS622311DRYT is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free. Its USON-6 (DRY) package uses matte tin (Sn) plating over copper leadframe and complies with JEDEC J-STD-020 moisture sensitivity level 2a (MSL-2a). Full compliance documentation, including substance declarations and test reports, is available through Texas Instruments' Quality & Environmental page - confirming the TPS622311DRYT meets REACH, halogen-free, and conflict minerals requirements.
TPS622311DRYT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-UFDFN
- 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):
- 2.05V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.1V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-SON (1.45x1)
TPS622311DRYT FAQ
1.How can I place an order for TPS622311DRYT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS622311DRYT 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 TPS622311DRYT reliable?
The price and inventory of TPS622311DRYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS622311DRYT is usually 5 days.
3.What payment methods are accepted for TPS622311DRYT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS622311DRYT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS622311DRYT?
TPS622311DRYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS622311DRYT 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 TPS622311DRYT?
For technical support, including TPS622311DRYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS622311DRYT requirements.
6.How does Aetrix verify that TPS622311DRYT is sourced from the original manufacturer or authorized distributors?
All TPS622311DRYT 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 TPS622311DRYT meets industry standards.
7.What is the process for return or replacement of TPS622311DRYT?
All TPS622311DRYT units undergo pre-shipment inspection (PSI). If there is an issue with TPS622311DRYT, 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 TPS622311DRYT part is unused and in its original packaging.
Return procedure for TPS622311DRYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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