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Texas Instruments TPS62227DDCR
- Part No.:
- TPS62227DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62227DDCR.pdf
- Description:
- IC REG BUCK 1.2V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
TPS62227DDCR from Texas Instruments is a fixed-output, 1.2-V synchronous step-down DC-DC converter in TSOT23-5 package, delivering up to 400 mA with 1.25-MHz PWM operation, 15-µA quiescent current in power-save mode, and 95% peak efficiency - designed for powering low-voltage DSPs and processors in battery-powered portable electronics.
For engineers reviewing the TPS62227DDCR datasheet, TPS62227DDCR pinout, TPS62227DDCR application, or TPS62227DDCR equivalent, key selection criteria include its fixed 1.2-V output, 2.5–6-V input range, TSOT23-5 thermal performance (250°C/W), soft-start behavior, and dynamic voltage positioning for load transient resilience.
Technical Context
The TPS62227DDCR employs voltage-mode control with input voltage feed-forward for fast line/load regulation and uses internal digital self-calibration to maintain ±3% output accuracy across load and line variations. Its dual-mode operation switches between fixed-frequency 1.25-MHz PWM at medium-to-heavy loads and pulse-frequency modulation (PFM) at light loads to sustain high efficiency down to 15 µA quiescent current.
It integrates P-channel (670 mΩ typ @ 3.6 V) and N-channel (540 mΩ typ @ 3.6 V) synchronous MOSFETs, supports 100% duty-cycle low-dropout operation, and features undervoltage lockout (1.5–2.0 V threshold) and enable-controlled shutdown (0.1 µA typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±3% over full load and line range - ensures stable core supply for low-voltage logic without external feedback resistors. |
| Input Voltage Range | 2.5 V to 6.0 V - compatible with single-cell Li-ion (2.7–4.2 V), 3-cell NiMH/NiCd, or standard 3.3/5-V rails. |
| Max Output Current | 400 mA - sufficient for powering TMS320 DSP cores, OMAP processors, or baseband ICs in handheld devices. |
| Switching Frequency | 1.25 MHz (typ), 0.8–1.85 MHz (min/max) - enables use of small 4.7-µH inductors and ceramic capacitors for compact PCB layout. |
| Quiescent Current | 15 µA (typ) in power-save mode - extends battery life in standby or low-activity states without sacrificing startup speed. |
| Efficiency Peak | Up to 95% - achieved at mid-load with 4.7-µH inductor and 10-µF output capacitor, minimizing thermal stress in thin-SOT23 package. |
| Thermal Resistance | 250°C/W (θJA) - defines maximum power dissipation (160 mW @ TA = 85°C) and requires careful copper pour design for thermal management. |
Pinout & Package
TPS62227DDCR is housed in a 5-pin TSOT23 (DDC) package - ultra-thin, surface-mount, lead-free, with 0.65-mm pitch and exposed thermal pad (not electrically connected). Package dimensions: 2.9 mm × 1.6 mm × 1.0 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power Input | Accepts 2.5–6 V supply; requires local 4.7-µF ceramic decoupling; connects directly to battery or intermediate rail. |
| 2 - GND | Ground Reference | Primary return path for power and control circuits; must be low-impedance connection to system ground plane. |
| 3 - EN | Enable Control | Active-high logic input; pull to VI to enable, to GND to shut down (0.1 µA IQ); must not float. |
| 4 - FB | Feedback Input | Internally tied to 1.2-V reference; no external resistor divider needed - simplifies layout and improves accuracy vs adjustable versions. |
| 5 - SW | Switch Node | Drives external 4.7-µH inductor; carries high di/dt; requires short, low-inductance trace to minimize EMI and switching losses. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output-Voltage Positioning | Maintains output ~0.8% above nominal (1.21 V) at light load to absorb heavy transient drops - reduces required output capacitance to 10 µF. |
| Soft Start | Digital current-step ramp (83 → 167 → 335 → 670 mA) limits inrush, preventing input rail collapse during startup from weak sources like batteries. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN ≈ VOUT + IOUT × rDS(on), extending usable battery voltage range and runtime in Li-ion applications. |
| Internal Digital Self-Calibration | Adjusts duty cycle in ~1% digital steps when VOUT deviates >±1.6%, achieving near-zero line/load regulation error without external compensation. |
| Synchronous Rectification | Integrated P- and N-channel MOSFETs eliminate external Schottky diode - improves efficiency by ~8–12% vs asynchronous designs at 400 mA. |
Applications
| Smartphone Baseband Power | Portable Media Player Core Supply |
|---|---|
Use Scenario: Powers ARM-based baseband processor in 3G/4G smartphones operating from single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 1.2-V core regulator delivering up to 400 mA with fast load transient response to handle burst-mode RF transmission. Use Value: Dynamic voltage positioning and 15-µA quiescent current extend talk time by >12% versus non-PFM converters under mixed usage profiles. | Use Scenario: Supplies 1.2-V core voltage to audio DSP and video decode engine in flash-based media players. IC Role / Device Role / Timing Role: High-efficiency step-down converter enabling 10+ hour playback on 800-mAh battery while maintaining tight voltage tolerance during codec switching. Use Value: 95% peak efficiency and TSOT23-5 footprint reduce board area by 35% vs comparable SO-8 solutions without compromising thermal margin. |
| OMAP™ Application Processor Rail | Low-Power PDA System-on-Chip |
Use Scenario: Provides regulated 1.2-V supply to OMAP-L137/138 application processors in industrial handheld terminals. IC Role / Device Role / Timing Role: Fixed-output buck converter with soft start and UVLO, synchronized to system power sequencing requirements. Use Value: Internal loop compensation and 1.25-MHz switching allow stable operation with only two external passives - reducing BOM count and assembly cost. | Use Scenario: Powers 1.2-V I/O and core domains of TI DaVinci™-based PDAs running Linux with touchscreen and Wi-Fi. IC Role / Device Role / Timing Role: Primary DC-DC regulator supporting dynamic voltage scaling (DVS) via enable control during CPU sleep states. Use Value: 0.1-µA shutdown current and 100% duty-cycle operation maximize battery reserve during suspend-to-RAM cycles. |
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 |
|---|---|---|---|
| TPS62221DDCR | Fixed 1.5-V output; identical package, pinout, and electrical specs except VOUT and feedback reference. | Used where system requires 1.5-V core rail (e.g., certain FPGA I/O banks or legacy DSPs), not 1.2-V logic. | Select TPS62221DDCR only if target voltage matches 1.5 V; no PCB change needed but verify downstream voltage tolerance. |
| TPS62231DDCR | Same 1.2-V output but higher 600-mA rating, 2.05-MHz switching, and improved 12-µA quiescent current; pin-compatible TSOT23-5. | Preferred for next-gen designs needing higher current headroom or tighter efficiency at light loads. | TPS62231DDCR offers upgrade path with no layout change; verify thermal margin at 600 mA continuous load. |
Compared with TPS62227DDCR, TPS62221DDCR provides identical functionality at 1.5 V for different voltage domains, while TPS62231DDCR delivers higher current and lower IQ in the same footprint - both require no schematic or layout revision but demand validation of output voltage and thermal performance in final application.
Availability
TPS62227DDCR is available at Aetrix Electronics and suitable for smartphone baseband power, portable media player core supply, and OMAP™ application processor rail applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62227DDCR 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 for portable and industrial systems.
The TPS6222x product line was engineered specifically for space-constrained, battery-powered portable electronics - prioritizing ultra-low quiescent current, small-footprint integration, and robust transient response in thin-SOT23 packaging.
FAQ
What is the output voltage tolerance of the TPS62227DDCR over temperature and load?
The TPS62227DDCR maintains a fixed 1.2-V output with ±3% tolerance across the full operating ambient temperature range (−40°C to +85°C) and full load range (0–400 mA), as verified by TI's electrical characteristics table under VI = 2.5 V to 6 V conditions. This specification includes combined effects of line regulation (0.26%/V), load regulation (0.0014%/mA), and internal reference drift. The TPS62227DDCR achieves this stability via digital self-calibration and internal feedback routing - no external components affect accuracy.
Does the TPS62227DDCR require external feedback resistors?
No, the TPS62227DDCR does not require external feedback resistors. As a fixed-output variant, its FB pin is internally connected to a precision 0.5-V reference and scaled to deliver exactly 1.2 V at the output. This eliminates resistor matching errors, reduces BOM count, and improves long-term voltage accuracy compared to adjustable versions like TPS62220. The TPS62227DDCR's FB pin must be left unconnected externally per datasheet guidance.
What is the minimum input voltage required for regulation under 400-mA load for the TPS62227DDCR?
The minimum input voltage for regulation at 400 mA is calculated as VIN(min) = VOUT + IOUT × rDS(on),P(max) + IOUT × RL, where rDS(on),P(max) = 850 mΩ (at VIN = 2.5 V) and typical inductor DCR is <50 mΩ. For VOUT = 1.2 V and IOUT = 400 mA, VIN(min) ≈ 1.2 V + 0.4 A × 0.85 Ω + 0.4 A × 0.05 Ω = ~1.58 V. However, the absolute minimum specified VI is 2.5 V - meaning the TPS62227DDCR cannot regulate at 400 mA below 2.5 V, even with 100% duty cycle enabled.
Can the TPS62227DDCR be used with a 4.7-µH inductor and 10-µF output capacitor?
Yes, the TPS62227DDCR is fully validated for use with a 4.7-µH inductor and 10-µF ceramic output capacitor - this combination appears in TI's typical application circuit and efficiency graphs (e.g., Figure 2, VO = 1.5 V). The device's internal compensation is optimized for L×C products near 47 µH·µF, and this pair yields stable operation with <1% output ripple and acceptable transient response. For 1.2-V output, ensure CO is X5R/X7R ceramic with ≥6.3-V rating to maintain capacitance under DC bias.
How does the power-save mode of the TPS62227DDCR affect output voltage accuracy?
In power-save mode, the TPS62227DDCR intentionally regulates output voltage ~0.8% above nominal (to ~1.21 V at light loads) to provide headroom for load transients - a feature called dynamic voltage positioning. This is not an inaccuracy but a controlled design behavior that reduces required output capacitance and improves transient recovery. The TPS62227DDCR still holds ±3% overall tolerance, as the 0.8% offset is subtracted from allowable droop during step-load events. Accuracy reverts to nominal 1.2 V during PWM mode at >~66 mA load.
TPS62227DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.2V
- 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
TPS62227DDCR FAQ
1.How can I place an order for TPS62227DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62227DDCR 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 TPS62227DDCR reliable?
The price and inventory of TPS62227DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62227DDCR is usually 5 days.
3.What payment methods are accepted for TPS62227DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62227DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62227DDCR?
TPS62227DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62227DDCR 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 TPS62227DDCR?
For technical support, including TPS62227DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62227DDCR requirements.
6.How does Aetrix verify that TPS62227DDCR is sourced from the original manufacturer or authorized distributors?
All TPS62227DDCR 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 TPS62227DDCR meets industry standards.
7.What is the process for return or replacement of TPS62227DDCR?
All TPS62227DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62227DDCR, 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 TPS62227DDCR part is unused and in its original packaging.
Return procedure for TPS62227DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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