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Texas Instruments TPS622318DRYR
- Part No.:
- TPS622318DRYR
- Manufacturer:
- Texas Instruments
- Package:
- 6-UFDFN
- Datasheet:
-
TPS622318DRYR.pdf
- Description:
- IC REG BUCK 1.25V 500MA 6SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,316
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Product details
Overview
TPS622318DRYR from Texas Instruments is a 3-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 1.25 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 power rails.
For engineers reviewing the TPS622318DRYR datasheet, TPS622318DRYR pinout, TPS622318DRYR application, or TPS622318DRYR equivalent, key selection criteria include its 1.25 V fixed output, 3 MHz switching frequency enabling sub-12 mm² solution size, forced-PWM capability via MODE pin, and thermal shutdown at 150°C - all critical for battery-powered audio, wireless, and DSP core supplies.
Technical Context
The TPS622318DRYR implements a hysteretic PWM controller architecture supporting both automatic power-save (PFM/PWM) and forced-PWM modes. Its internal 0.7 V reference feeds a precision error comparator that triggers switch pulses based on output voltage deviation, with minimum ON-time of 135 ns and minimum OFF-time of 40 ns.
It integrates complementary PMOS/NMOS power switches with typical RDS(ON) of 600 mΩ (high-side) and 350 mΩ (low-side), current-limited to 850 mA (high-side) and 840 mA (low-side), and features undervoltage lockout (UVLO) with 1.9 V rising threshold and thermal shutdown at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25 V ±2.5% over –40°C to 125°C; enables stable core supply for low-voltage DSPs and RF ICs. |
| Input Voltage Range | 2.05 V to 6 V; supports single Li-ion (2.5–4.2 V), Li-primary, or two alkaline cells without external regulation. |
| Switching Frequency | 3 MHz nominal; allows use of 2.2 μH inductor and 4.7 μF output capacitor for <12 mm² PCB area and ≤0.6 mm height. |
| Max Output Current | 500 mA continuous; limited by internal 850 mA high-side MOSFET current sense and thermal design (RθJA = 294.5°C/W). |
| Quiescent Current | 22 μA in PFM mode at no load; extends battery life in always-on sensor or standby subsystems. |
| Efficiency | Up to 94%; achieved at medium loads in PWM mode, with PSRR up to 90 dB reducing noise coupling into analog/RF sections. |
| Operating Temperature | –40°C to 125°C junction; qualified for industrial and extended-temperature portable applications. |
Pinout & Package
TPS622318DRYR is housed in a 1 mm × 1.5 mm × 0.6 mm, 6-pin USON (DRY) package with wettable flanks, optimized for automated optical inspection and high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE (Pin 1) | Mode control input | Pull low for automatic PFM/PWM transition; pull high for forced-PWM operation - eliminates audible noise and improves EMI filtering. |
| SW (Pin 2) | Power switch node | Connects to inductor; carries high-frequency AC current and must be routed with minimal loop area to reduce EMI. |
| VIN (Pin 3) | Main power input | Accepts 2.05–6 V; requires local 2.2 μF ceramic decoupling close to pin to suppress input ripple and UVLO glitches. |
| GND (Pin 4) | Power ground | Common return for VIN, SW, FB, EN, MODE; must be solid copper pour under device for thermal and noise performance. |
| EN (Pin 5) | Enable input | Active-high logic; must be terminated (no internal pull-up); enables power sequencing with other rails or microcontroller GPIO. |
| FB (Pin 6) | Feedback input | Direct connection to output capacitor; internal resistor divider sets 1.25 V output - no external resistors required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small solution size | 12 mm² total PCB area using only 2.2 μH inductor and 4.7 μF output capacitor - ideal for wearables and compact IoT nodes. |
| High PSRR (up to 90 dB) | Rejects input supply noise across 10 Hz–1 MHz, making TPS622318DRYR suitable for noise-sensitive RF and audio signal chains. |
| 100% duty cycle operation | Enables lowest dropout - maintains regulation even when VIN approaches VOUT (e.g., 1.35 V input → 1.25 V output). |
| Soft-start with pre-bias start-up | Monotonic 100 μs ramp-up and safe start into precharged output capacitors - prevents reverse current and system reset issues. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and resumes at 130°C - protects against sustained overload or poor heatsinking. |
Applications
| Portable Audio Power Supply | Low-Power Wireless Transceiver Core |
|---|---|
Use Scenario: Powering DAC, headphone amplifier, and codec in Bluetooth earbuds with tight board space and battery runtime constraints. IC Role / Device Role / Timing Role: Primary 1.25 V core regulator delivering clean, low-noise DC from single Li-ion cell. Use Value: 94% efficiency and 90 dB PSRR minimize audible hiss and extend playback time beyond 8 hours per charge. | Use Scenario: Supplying 1.25 V core voltage to BLE SoC (e.g., CC2640R2F) during active transmit/receive bursts and deep-sleep states. IC Role / Device Role / Timing Role: High-efficiency buck converter with 22 μA quiescent current and fast transient response for RF power management. Use Value: Enables >10-year battery life in coin-cell-powered sensors by maintaining ultra-low IQ in sleep and rapid wake-up without output droop. |
| DSP Core Voltage Rail | Digital Camera Image Sensor Bias |
Use Scenario: Providing regulated 1.25 V to low-power DSP cores (e.g., C55x, C674x derivatives) in portable medical or industrial edge devices. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC converter replacing inefficient LDOs to reduce heat and improve power density. Use Value: 500 mA capability and –40°C to 125°C operation support reliable real-time processing in harsh environments. | Use Scenario: Biasing CMOS image sensor analog front-end requiring stable, low-ripple 1.25 V under dynamic exposure conditions. IC Role / Device Role / Timing Role: Low-noise, high-PSRR step-down regulator with forced-PWM mode to eliminate switching artifacts in captured images. Use Value: Sub-10 mVPP output ripple in forced-PWM mode prevents banding or fixed-pattern noise in high-resolution video capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS622312DRYR | Fixed 2.0 V output; identical 3 MHz frequency, package, and feature set. | Suitable where higher core voltage is required (e.g., legacy MCU cores), not drop-in for 1.25 V systems. | Select TPS622312DRYR only if target rail is 2.0 V - pinout and layout are identical, but output voltage is incompatible. |
| TPS62235DRYR | Fixed 1.2 V output; same 2 MHz switching frequency (vs. 3 MHz), otherwise identical specs and package. | Better suited for lower-noise, lower-EMI designs where 2 MHz allows larger inductors; slightly lower efficiency at light loads vs. 3 MHz. | Choose TPS62235DRYR when EMI compliance is prioritized over minimum solution size - same footprint, different frequency and VOUT. |
Compared with TPS622318DRYR, TPS622312DRYR provides +0.75 V higher output for non-1.25 V rails, while TPS62235DRYR trades 1 MHz bandwidth for reduced EMI and 0.05 V lower output - both share identical USON-6 layout and thermal behavior but require voltage-specific validation.
Availability
TPS622318DRYR is available at Aetrix Electronics and suitable for portable audio, low-power wireless, and DSP core supply applications requiring stable component supply, long-term manufacturability, and consistent parametric performance across production batches.
Supply support for TPS622318DRYR 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 leadership in high-efficiency DC-DC conversion and industrial-grade reliability.
The TPS6223x product line was designed specifically for ultra-compact, high-frequency step-down regulation in battery-powered portable electronics - emphasizing minimal solution size, low quiescent current, and compatibility with tiny passive components.
FAQ
What is the fixed output voltage of the TPS622318DRYR?
The TPS622318DRYR has a factory-trimmed fixed output voltage of 1.25 V, with accuracy of ±2.5% over –40°C to 125°C junction temperature. This value is set internally via a precision resistor divider connected to the FB pin, eliminating the need for external feedback resistors and simplifying layout for space-constrained designs.
Does the TPS622318DRYR support forced-PWM mode, and how is it enabled?
Yes, the TPS622318DRYR supports forced-PWM mode to eliminate pulse-skipping noise. It is enabled by pulling the MODE pin (Pin 1) high to VIN. In this mode, the device operates at quasi-fixed 3 MHz frequency regardless of load, improving EMI filterability and preventing audible noise - critical for audio and imaging applications where PFM ripple is unacceptable.
What is the minimum input voltage required for the TPS622318DRYR to start up and regulate?
The TPS622318DRYR requires a minimum input voltage of 2.05 V to initiate startup and maintain regulation. Below this threshold, the undervoltage lockout (UVLO) circuit disables switching. The rising UVLO threshold is typically 1.9 V, ensuring stable operation once VIN exceeds 2.05 V - enabling compatibility with deeply discharged Li-ion cells and dual-alkaline sources.
Can the TPS622318DRYR operate with a pre-biased output capacitor?
Yes, the TPS622318DRYR supports start-up into a pre-biased output capacitor. Its soft-start circuitry ramps the output from the existing bias voltage to the regulated 1.25 V without causing reverse current flow or output overshoot - a key requirement in multi-rail systems where power sequencing must avoid back-driving powered-down sections.
What thermal protection features does the TPS622318DRYR include?
The TPS622318DRYR incorporates thermal shutdown that activates at 150°C junction temperature, turning off both high- and low-side MOSFETs. Operation resumes automatically when the junction cools to approximately 130°C due to 20°C hysteresis. This protects against sustained overload, poor PCB thermal design, or ambient overheating - ensuring robust field reliability without external monitoring circuits.
TPS622318DRYR 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):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-SON (1.45x1)
TPS622318DRYR FAQ
1.How can I place an order for TPS622318DRYR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS622318DRYR 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 TPS622318DRYR reliable?
The price and inventory of TPS622318DRYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS622318DRYR is usually 5 days.
3.What payment methods are accepted for TPS622318DRYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS622318DRYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS622318DRYR?
TPS622318DRYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS622318DRYR 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 TPS622318DRYR?
For technical support, including TPS622318DRYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS622318DRYR requirements.
6.How does Aetrix verify that TPS622318DRYR is sourced from the original manufacturer or authorized distributors?
All TPS622318DRYR 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 TPS622318DRYR meets industry standards.
7.What is the process for return or replacement of TPS622318DRYR?
All TPS622318DRYR units undergo pre-shipment inspection (PSI). If there is an issue with TPS622318DRYR, 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 TPS622318DRYR part is unused and in its original packaging.
Return procedure for TPS622318DRYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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