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Texas Instruments TPS622318DRYT
- Part No.:
- TPS622318DRYT
- Manufacturer:
- Texas Instruments
- Package:
- 6-UFDFN
- Datasheet:
-
TPS622318DRYT.pdf
- Description:
- IC REG BUCK 1.25V 500MA 6SON
- Quantity:
- Payment:
- Shipping:
Inventory:662
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Product details
Overview
TPS622318DRYT 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 - optimized for Li-ion–powered portable audio and low-power wireless systems.
For engineers reviewing the TPS622318DRYT datasheet, TPS622318DRYT pinout, TPS622318DRYT application, or TPS622318DRYT equivalent, key selection criteria include its ultra-small 12 mm² solution size, forced-PWM capability via MODE pin, high PSRR (up to 90 dB), 0.7 V internal reference, and thermal shutdown at 150°C.
Technical Context
The TPS622318DRYT implements a hysteretic PWM controller topology enabling 3 MHz switching with excellent AC load regulation and low output ripple across full load range. It supports automatic transition between pulse frequency modulation (PFM) at light loads and quasi-fixed-frequency PWM at medium/heavy loads.
Its integrated high-side/low-side MOSFETs feature typical RDS(ON) of 600 mΩ (PMOS) and 350 mΩ (NMOS), with internal current limiting (850 mA typ) and soft-start circuitry ensuring monotonic 100 μs startup into pre-biased outputs - critical for noise-sensitive RF and audio supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25 V - eliminates external feedback resistor network, reduces BOM count and layout area. |
| Switching Frequency | 3 MHz - enables use of tiny 2.2 μH inductor and 4.7 μF output capacitor, minimizing solution footprint to <12 mm². |
| Input Voltage Range | 2.05 V to 6 V - supports single-cell Li-ion (2.7–4.2 V), Li-primary, or two alkaline batteries without dropout issues. |
| Max Output Current | 500 mA - sufficient for low-power DSP cores, camera ISPs, and Bluetooth SoCs under typical thermal conditions. |
| Quiescent Current | 22 μA (PFM mode) - extends battery life in always-on sensor nodes and standby audio subsystems. |
| PSRR | Up to 90 dB - suppresses input ripple and noise, making it suitable as LDO replacement in analog-sensitive signal chains. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
TPS622318DRYT 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 portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE | Mode control input | Pull low for automatic PFM/PWM transition; pull high for forced PWM operation - enables deterministic noise filtering in RF sections. |
| SW | Switch node | Connects to external 2.2 μH inductor; carries high di/dt switching current - requires tight loop layout to minimize EMI. |
| VIN | Power input | Accepts 2.05–6 V; must be decoupled with 2.2 μF ceramic capacitor close to pin to stabilize high-frequency switching. |
| FB | Feedback input | Internally connected to 0.7 V reference; not externally configurable - simplifies design but fixes output to 1.25 V. |
| EN | Enable input | Active-high logic; must be terminated (no internal pull-down) - enables precise power sequencing with upstream regulators. |
| GND | Power ground | Primary return path for switch current and IC bias - requires low-impedance connection to thermal pad for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small solution size | 12 mm² total PCB area with only three external components (inductor + two capacitors) - ideal for space-constrained wearables. |
| High PSRR (90 dB) | Rejects input supply noise up to 100 kHz - allows direct connection to noisy battery rails without additional LC filtering. |
| Optimized PFM mode | Maintains low output ripple even at 10–100 μA loads using small 4.7 μF output cap - avoids audible coil whine in portable media players. |
| 100% duty cycle capability | Supports lowest possible dropout (VOUT − VIN ≈ 0) during brownout - sustains core voltage during Li-ion discharge tail. |
| Soft-start (100 μs) | Monotonic VOUT ramp prevents inrush current spikes on weak sources like coin cells - ensures stable startup into pre-biased outputs. |
Applications
| Portable Audio Supply | Low-Power Wireless Node |
|---|---|
Use Scenario: Powering DAC, headphone amplifier, and codec in Bluetooth earbuds with single Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.25 V core supply for audio processing ASIC, replacing inefficient LDO to extend playback time. Use Value: 94% peak efficiency and 22 μA quiescent current directly increase battery runtime by >25% versus linear regulation. | Use Scenario: Supplying sub-GHz transceiver (e.g., CC1310) and microcontroller in battery-operated sensor tag. IC Role / Device Role / Timing Role: Main 1.25 V rail for RF front-end and digital logic, synchronized via EN pin to sleep/wake cycles. Use Value: 3 MHz switching avoids interference with ISM band; forced PWM mode ensures clean spectrum during TX bursts. |
| Digital Camera ISP Core | Wearable Health Sensor Hub |
Use Scenario: Delivering stable 1.25 V to image signal processor in compact action cam with limited board area. IC Role / Device Role / Timing Role: High-PSRR point-of-load regulator isolating ISP from noisy motor and flash circuits. Use Value: 90 dB PSRR suppresses switching artifacts in image data, eliminating visible banding in low-light video. | Use Scenario: Powering optical heart-rate sensor (PPG), accelerometer, and BLE SoC in fitness tracker. IC Role / Device Role / Timing Role: Single-supply source for mixed-signal analog front-end and digital subsystem, managed via MODE pin. Use Value: Ultra-low 22 μA quiescent current in PFM mode extends shelf life and operational time between charges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS622312DRYT | Fixed 2.0 V output; identical package, pinout, and electrical specs except VOUT. | Used where higher core voltage required for legacy MCU or FPGA I/O banks. | Select when system requires 2.0 V rail instead of 1.25 V - no layout change needed. |
| TPS62235DRYT | Fixed 1.2 V output; same 3 MHz frequency, USON-6 package, and 500 mA rating. | Suitable for newer ultra-low-voltage DSPs or AI accelerators requiring tighter voltage tolerance. | Choose for 1.2 V compliance-critical designs; differs only in output voltage and marking code (OQ vs ST). |
Compared with TPS622318DRYT, TPS622312DRYT provides higher output for compatibility with 2.0 V logic domains, while TPS62235DRYT offers marginally lower voltage for next-gen 1.2 V cores - both retain identical thermal, noise, and footprint behavior.
Availability
TPS622318DRYT is available at Aetrix Electronics and suitable for portable audio, low-power wireless, and wearable health monitoring applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS622318DRYT 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 TPS6223x product line was designed specifically for ultra-compact, battery-powered portable electronics - prioritizing minimal solution size, high light-load efficiency, and robust noise performance in constrained form factors.
FAQ
What is the fixed output voltage of the TPS622318DRYT?
The TPS622318DRYT has a factory-trimmed fixed output voltage of 1.25 V, achieved via an internal 0.7 V reference and precision resistor divider. This eliminates external feedback components, reduces solution size, and ensures ±2.5% accuracy over –40°C to 125°C junction temperature. The TPS622318DRYT does not support adjustable output.
Does the TPS622318DRYT require external feedback resistors?
No, the TPS622318DRYT does not require external feedback resistors. Its 1.25 V output is set internally using a precision 0.7 V reference and matched on-die resistive divider. This simplifies layout, reduces BOM cost, and improves reliability - all key advantages of the TPS622318DRYT in space-constrained designs.
Can the TPS622318DRYT operate from a single alkaline battery?
Yes, the TPS622318DRYT supports input voltages as low as 2.05 V, enabling reliable operation from two fresh alkaline cells (nominal 3.0 V, down to ~2.1 V under load). Its 100% duty cycle capability maintains regulation even near end-of-life, making the TPS622318DRYT suitable for long-life consumer remote controls and IoT sensors.
How does the MODE pin affect TPS622318DRYT operation?
The MODE pin on the TPS622318DRYT selects between two operating modes: pulled low enables automatic PFM/PWM transition for highest light-load efficiency (22 μA IQ); pulled high forces continuous PWM mode for predictable switching frequency and reduced output ripple - essential for noise-sensitive RF or audio circuits powered by the TPS622318DRYT.
What thermal protection features does the TPS622318DRYT include?
The TPS622318DRYT incorporates thermal shutdown at 150°C (typical) with 20°C hysteresis, automatically disabling both MOSFETs until junction temperature falls below 130°C. This protects against sustained overload or inadequate PCB copper area. Its USON-6 package delivers RθJA = 294.5°C/W, so proper thermal pad soldering is critical for the TPS622318DRYT to sustain 500 mA output.
TPS622318DRYT 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)
TPS622318DRYT FAQ
1.How can I place an order for TPS622318DRYT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS622318DRYT 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 TPS622318DRYT reliable?
The price and inventory of TPS622318DRYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS622318DRYT is usually 5 days.
3.What payment methods are accepted for TPS622318DRYT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS622318DRYT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS622318DRYT?
TPS622318DRYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS622318DRYT 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 TPS622318DRYT?
For technical support, including TPS622318DRYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS622318DRYT requirements.
6.How does Aetrix verify that TPS622318DRYT is sourced from the original manufacturer or authorized distributors?
All TPS622318DRYT 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 TPS622318DRYT meets industry standards.
7.What is the process for return or replacement of TPS622318DRYT?
All TPS622318DRYT units undergo pre-shipment inspection (PSI). If there is an issue with TPS622318DRYT, 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 TPS622318DRYT part is unused and in its original packaging.
Return procedure for TPS622318DRYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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