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Texas Instruments TPS62222DDCTG4
- Part No.:
- TPS62222DDCTG4
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62222DDCTG4.pdf
- Description:
- IC REG BUCK 1.8V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
TPS62222DDCTG4 from Texas Instruments is a fixed-output, synchronous step-down DC-DC converter delivering 1.8 V at up to 400 mA from a 2.5–6 V input. It integrates P- and N-channel MOSFETs, operates at 1.25 MHz PWM under load, enters power-save mode (PFM) at light loads with 15 µA quiescent current, and supports 100% duty-cycle low-dropout operation for extended battery runtime in portable systems.
For engineers reviewing the TPS62222DDCTG4 datasheet, TPS62222DDCTG4 pinout, TPS62222DDCTG4 application, or TPS62222DDCTG4 equivalent, key selection criteria include its TSOT23-5 package footprint, ±3% output voltage accuracy over load/line/temperature, dynamic voltage positioning for transient response, soft-start functionality, and compatibility with small ceramic capacitors (4.7 µF input, 10 µF output) and 4.7 µH inductors.
Technical Context
The TPS62222DDCTG4 uses voltage-mode control with input-voltage feed-forward to achieve fast line and load regulation. Its internal GM amplifier compares feedback voltage against a precise 500 mV reference, enabling stable operation with minimal external components.
At light loads (<66 mA), it transitions into pulse-frequency modulation (PFM) power-save mode-reducing switching frequency and quiescent current to 15 µA typical-while maintaining regulation via dynamically adjusted skip thresholds (comp low at +0.8%, comp high at +1.6% of nominal VO). Under heavy load, it reverts to fixed 1.25 MHz PWM with cycle-by-cycle current limiting (600–880 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (2.7–4.2 V) and standard 3.3 V/5 V rails without external regulators. |
| Output Voltage | Fixed 1.8 V ±3% - optimized for core supply of OMAP™ processors, low-power DSPs, and memory interfaces. |
| Max Output Current | 400 mA - sufficient for powering baseband processors or RF subsystems in handheld devices. |
| Switching Frequency | 1.25 MHz typical - enables use of compact 4.7 µH inductors and reduces EMI filtering requirements. |
| Quiescent Current | 15 µA typical in power-save mode - extends battery life in standby/sleep states of portable electronics. |
| Efficiency Peak | 95% - achieved at mid-load with 4.7 µH inductor and ceramic capacitors, minimizing thermal stress in TSOT23-5. |
| Package | TSOT23-5 (DDC) - 2.9 mm × 1.6 mm × 0.8 mm footprint compatible with high-density PCB layouts. |
Pinout & Package
TPS62222DDCTG4 is housed in a 5-pin Thin-SOT23 (DDC) package with 0.95 mm pitch, designed for surface-mount assembly and thermal performance up to 125°C junction temperature. The package exposes no thermal pad; power dissipation is managed via PCB copper area under the exposed die pad (pin 2 GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power Input | Accepts 2.5–6 V supply; requires 4.7 µF ceramic capacitor placed within 3 mm for stability and EMI suppression. |
| 2 - GND | Ground Reference | Primary ground return path; must be connected to large PCB copper pour to minimize noise coupling and support thermal dissipation. |
| 3 - EN | Enable Control | Active-high logic input; pulled high to enable conversion, grounded to enter shutdown (0.1 µA IQ); must not float. |
| 4 - FB | Feedback Input | Internally connected to 1.8 V divider; shorted to output for fixed-version operation-no external resistors required. |
| 5 - SW | Switch Node | Drives external 4.7 µH inductor; carries high di/dt; requires tight layout with minimal trace length and adjacent ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output-Voltage Positioning | Maintains output at +0.8% above nominal during light load, providing headroom to absorb heavy-load transients without undershoot. |
| Digital Self-Calibration | Adjusts duty cycle in ~1% digital steps when VO deviates >±1.6%, achieving near-zero line/load regulation error without external compensation. |
| Soft Start | Staged current limit (83 → 167 → 335 → 670 mA) prevents input voltage sag during startup from weak sources like batteries or supercaps. |
| 100% Duty-Cycle Operation | Enables regulation down to VI ≈ VO + IO × rDS(on)_PCH + IL × R_L, maximizing usable battery voltage range in Li-ion applications. |
| Integrated Synchronous Switches | P-channel (670 mΩ typ @ 3.6 V) and N-channel (540 mΩ typ @ 3.6 V) MOSFETs eliminate external rectifier and reduce conduction losses. |
Applications
| Smartphone Baseband Supply | OMAP™ Processor Core Rail |
|---|---|
Use Scenario: Powers ARM-based application processors in dual-mode smartphones during active data sessions and idle monitoring. IC Role / Device Role / Timing Role: Primary 1.8 V core regulator with dynamic voltage positioning to handle rapid CPU frequency scaling and burst traffic loads. Use Value: Delivers 400 mA with <15 µA quiescent current in sleep mode and maintains <3% output deviation across -40°C to 85°C ambient. |
Use Scenario: Supplies core voltage to TI OMAP-L138 and similar low-power multimedia processors in portable media players. IC Role / Device Role / Timing Role: Fixed-output buck converter synchronized to system clock domain; supports fast wake-up from deep-sleep states. Use Value: Achieves 95% peak efficiency at 200 mA with 4.7 µH/10 µF passive set, reducing thermal load in sealed enclosures. |
| WLAN PC Card Power | Digital Camera Image Sensor Bias |
Use Scenario: Provides regulated 1.8 V to IEEE 802.11b/g radio modules in laptop expansion cards with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) switching regulator minimizing conducted emissions into adjacent RF circuits. Use Value: Enables compact layout using TSOT23-5 and ceramic passives, meeting FCC Class B radiated emission requirements without shielding. |
Use Scenario: Supplies clean, low-noise 1.8 V bias to CMOS image sensor analog front-end in compact digital cameras. IC Role / Device Role / Timing Role: Low-ripple DC-DC source with soft-start and dynamic positioning to prevent sensor reset glitches during power-on. Use Value: Maintains <10 mVpp output ripple under 300 mA load steps, eliminating visible banding in captured images. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62221DDCT | Fixed 1.5 V output; identical pinout, package, and electrical specs except VO and feedback network. | Suitable where system requires 1.5 V core rail instead of 1.8 V (e.g., certain DSP I/O domains). | Select when matching exact voltage requirement; no layout change needed but verify load regulation at target VO. |
| TPS62229DDCR | Fixed 1.7 V output; same TSOT23-5 package, 1.25 MHz operation, and power-save mode behavior. | Used in newer portable designs migrating from 1.8 V to 1.7 V logic rails for lower power consumption. | Choose for voltage-scaling initiatives; validate transient response with existing 4.7 µH/10 µF filter. |
Compared with TPS62222DDCTG4, TPS62221DDCT delivers lower output voltage (1.5 V vs 1.8 V) with identical efficiency and quiescent current, while TPS62229DDCR offers intermediate 1.7 V output-both retain full functional compatibility for board reuse where voltage tolerance allows.
Availability
TPS62222DDCTG4 is available at Aetrix Electronics and suitable for smartphone baseband supplies, OMAP™ processor core rails, WLAN PC card power, and digital camera image sensor bias requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for TPS62222DDCTG4 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 connectivity technologies, with decades of expertise in power management IC design and manufacturing.
The TPS6222x family-including TPS62222DDCTG4-is engineered for space-constrained, battery-powered portable electronics, emphasizing high efficiency across wide load ranges, ultra-low quiescent current, and seamless integration with ceramic passives.
FAQ
What is the output voltage tolerance of the TPS62222DDCTG4 over temperature and load?
The TPS62222DDCTG4 maintains a fixed 1.8 V output with ±3% tolerance across the full operating range of -40°C to 85°C ambient temperature and 0–400 mA load current. This specification is verified per TI's SLVS491E datasheet under conditions including VI = 2.5–6 V and TA = -40°C to 85°C. The device achieves this via internal digital self-calibration that adjusts duty cycle in ~1% steps when output deviates beyond ±1.6% of nominal.
Does the TPS62222DDCTG4 require external feedback resistors?
No, the TPS62222DDCTG4 does not require external feedback resistors. As a fixed-output variant, its internal resistor divider is permanently configured for 1.8 V, and the FB pin is internally connected to the output node. External resistors are only needed for the adjustable version (TPS62220); adding them to TPS62222DDCTG4 would disrupt regulation and is not supported.
Can the TPS62222DDCTG4 operate with a 4.7 µH inductor and 10 µF output capacitor?
Yes, the TPS62222DDCTG4 is fully validated with a 4.7 µH inductor and 10 µF ceramic output capacitor for 1.8 V output. TI's datasheet specifies this combination for VO > 2 V, and confirms stable operation with ≤3% output deviation and 95% peak efficiency. For optimal transient response, place the capacitor within 5 mm of the SW and GND pins.
What is the shutdown current of the TPS62222DDCTG4?
The TPS62222DDCTG4 draws 0.1 µA typical shutdown current when the EN pin is pulled low. During shutdown, both internal P-channel and N-channel MOSFETs are turned off, the internal feedback divider is disconnected, and all control circuitry is disabled. This ultra-low leakage preserves battery charge in always-on portable systems.
Is the TPS62222DDCTG4 RoHS-compliant and lead-free?
Yes, the TPS62222DDCTG4 is RoHS-compliant and lead-free. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for Pb-free soldering processes per IPC/JEDEC J-STD-020. The "G4" suffix in the part number explicitly denotes TI's green packaging standard, including halogen-free laminates and lead-free terminations.
TPS62222DDCTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS62222DDCTG4 FAQ
1.How can I place an order for TPS62222DDCTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62222DDCTG4 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 TPS62222DDCTG4 reliable?
The price and inventory of TPS62222DDCTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62222DDCTG4 is usually 5 days.
3.What payment methods are accepted for TPS62222DDCTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62222DDCTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62222DDCTG4?
TPS62222DDCTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62222DDCTG4 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 TPS62222DDCTG4?
For technical support, including TPS62222DDCTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62222DDCTG4 requirements.
6.How does Aetrix verify that TPS62222DDCTG4 is sourced from the original manufacturer or authorized distributors?
All TPS62222DDCTG4 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 TPS62222DDCTG4 meets industry standards.
7.What is the process for return or replacement of TPS62222DDCTG4?
All TPS62222DDCTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62222DDCTG4, 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 TPS62222DDCTG4 part is unused and in its original packaging.
Return procedure for TPS62222DDCTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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