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Texas Instruments TPS62222DDCT
- Part No.:
- TPS62222DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62222DDCT.pdf
- Description:
- IC REG BUCK 1.8V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:455
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Product details
Overview
TPS62222DDCT from Texas Instruments is a fixed-output 1.8 V, 400-mA synchronous step-down DC-DC converter in a TSOT23-5 package, operating from 2.5 V to 6 V input with 1.25-MHz PWM switching and up to 95% efficiency. It delivers regulated power to low-voltage processors in portable electronics, including OMAP™ and TMS320™ DSPs, with soft start, 15 µA quiescent current in power-save mode, and 100% duty cycle low-dropout operation.
For engineers reviewing the TPS62222DDCT datasheet, TPS62222DDCT pinout, TPS62222DDCT application, or TPS62222DDCT equivalent, key selection criteria include its fixed 1.8 V output, TSOT23-5 footprint compatibility, light-load PFM efficiency optimization, EN-controlled shutdown (0.1 µA), and FB pin configuration for fixed-output variants - all critical for battery-powered handheld design validation and BOM consolidation.
Technical Context
The TPS62222DDCT implements voltage-mode control with input voltage feed-forward, enabling fast line and load transient response using only ceramic input/output capacitors. 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 across 0.01–400 mA.
Internal digital self-calibration adjusts duty cycle in ~1% output voltage steps to maintain ±3% regulation over line and load variations, while dynamic voltage positioning holds output 0.8% above nominal during light load to minimize voltage droop during sudden load transients - a feature enabled by comparator thresholds at 0.8% and 1.6% above VO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±3% over 2.5–6 V input and 0–400 mA load - ensures stable core supply for 1.8 V logic domains. |
| Max Output Current | 400 mA continuous - supports single-core DSPs and baseband processors in compact handhelds. |
| Input Voltage Range | 2.5 V to 6 V - compatible with single-cell Li-ion (2.7–4.2 V), 3-cell NiMH (3.6 V), and 3.3/5 V rails. |
| Switching Frequency | 1.25 MHz typical (0.8–1.85 MHz range) - enables use of small 4.7 µH inductors and 10–22 µF ceramic output caps. |
| Quiescent Current | 15 µA typical in power-save mode - extends battery runtime in standby/sleep states of portable devices. |
| Shutdown Current | 0.1 µA typical - minimizes system leakage when powered off via EN pin control. |
| Efficiency Peak | Up to 95% at 200 mA - reduces thermal load and improves energy conversion in space-constrained layouts. |
Pinout & Package
TSOT23-5 package (2.9 mm × 1.6 mm × 0.9 mm, 0.95 mm pitch) with wettable flanks; thermally enhanced for 400 mW dissipation at TA ≤ 25°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power Input | Accepts 2.5–6 V supply; requires 4.7 µF ceramic input capacitor close to pin for stability and EMI reduction. |
| 2 - GND | Ground Reference | Primary return path for power and feedback circuits; must be connected to low-impedance PCB ground plane. |
| 3 - EN | Enable Control | Active-high logic input; pull to VI to enable, to GND to enter 0.1 µA shutdown - no floating allowed. |
| 4 - FB | Feedback Sense | Internally tied to 1.8 V reference for fixed-output version; not used externally - connect directly to output. |
| 5 - SW | Switch Node | Drives external 4.7 µH inductor; carries high di/dt - requires short, wide trace and ground pour clearance. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated P-channel high-side and N-channel low-side MOSFETs reduce conduction loss vs. diode-based converters. |
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal during light load, providing headroom to absorb 400 mA transient drops without undershoot. |
| Digital Self-Calibration | Adjusts duty cycle in ~1% VO steps to hold output within ±3% tolerance across temperature, line, and load - eliminates external compensation. |
| Soft Start | Digitally ramps switch current in 83/167/335/670 mA steps - limits inrush into 10–22 µF output caps and prevents input rail collapse. |
| 100% Duty Cycle Operation | Enables regulation down to VI = VO + IO×rDS(on) - maximizes usable battery voltage range in Li-ion systems. |
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 1.8 V core regulator delivering up to 400 mA with dynamic load tracking during RF transmit bursts. Use Value: 95% peak efficiency and 15 µA quiescent current extend talk time; PFM/PWM transition ensures stable VCC during sleep-to-active transitions. | Use Scenario: Supplies 1.8 V core voltage to audio DSP and NAND controller in flash-based MP3 players. IC Role / Device Role / Timing Role: Fixed-output buck converter with integrated soft start and undervoltage lockout for cold-start reliability. Use Value: 100% duty cycle operation sustains regulation until battery reaches 1.85 V, increasing usable capacity by ~8% versus non-LDO buck converters. |
| OMAP™ Application Processor Rail | WLAN PC Card Voltage Translation |
Use Scenario: Generates 1.8 V I/O and core supply for TI OMAP-L137/138 processors in industrial handheld terminals. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with fast transient response to handle burst-mode CPU activity. Use Value: Voltage-mode control with feed-forward achieves <50 µs load transient recovery; ±3% regulation ensures reliable DDR interface timing margins. | Use Scenario: Converts 3.3 V host bus voltage to 1.8 V for IEEE 802.11b/g WLAN mini-PCI cards in laptops. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC solution meeting PC Card form factor and thermal constraints. Use Value: TSOT23-5 footprint (2.9 × 1.6 mm) fits tight card edge space; 1.25 MHz switching avoids interference with 2.4 GHz RF band. |
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 package, pinout, and electrical specs except VO and feedback network. | Targets 1.5 V I/O rails (e.g., certain FPGA banks or memory interfaces) instead of 1.8 V processor cores. | Select when system requires 1.5 V with same size, efficiency, and enable/shutdown behavior. |
| TPS62229DDCT | Fixed 1.7 V output; shares all timing, thermal, and control characteristics but differs in reference voltage and FB divider ratio. | Suitable for newer low-voltage SoCs with 1.7 V core requirements, such as select TI DaVinci variants. | Choose for 1.7 V applications where 1.8 V would exceed maximum core voltage rating. |
Compared with TPS62222DDCT, TPS62221DDCT and TPS62229DDCT offer identical thermal performance, package, and control architecture but differ solely in factory-trimmed output voltage - making them drop-in replacements for designs requiring 1.5 V or 1.7 V instead of 1.8 V, with no layout or firmware changes needed.
Availability
TPS62222DDCT is available at Aetrix Electronics and suitable for smartphone baseband power, OMAP™ processor rails, portable media player core supplies, and WLAN PC card voltage translation requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS62222DDCT 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 ICs, with leadership in high-efficiency DC-DC conversion for portable and industrial applications.
The TPS6222x product line was designed specifically for space-constrained, battery-powered systems requiring high efficiency across wide load ranges - targeting PDAs, smart phones, digital cameras, and wireless modules where TSOT23-5 footprint and sub-15 µA quiescent current are critical.
FAQ
What is the output voltage tolerance of the TPS62222DDCT over temperature and load?
The TPS62222DDCT maintains a fixed 1.8 V output with ±3% tolerance across –40°C to 85°C ambient temperature and 0–400 mA load current, verified under 2.5–6 V input conditions. This specification is achieved through internal digital self-calibration that adjusts duty cycle in ~1% VO steps, eliminating need for external trimming components. The TPS62222DDCT meets this tolerance without requiring external feedback resistors since its FB pin is internally configured for the 1.8 V variant.
Does the TPS62222DDCT require external compensation components?
No, the TPS62222DDCT uses fully internal loop compensation optimized for standard output filters (e.g., 4.7 µH inductor + 10–22 µF ceramic capacitor). Its voltage-mode controller with input voltage feed-forward and digital self-calibration eliminates the need for external compensation networks. The TPS62222DDCT achieves stable operation with only three external components: input cap, output cap, and inductor - simplifying layout and reducing BOM count.
Can the TPS62222DDCT operate with a 2.5 V input and still regulate 1.8 V output?
Yes, the TPS62222DDCT supports 100% duty cycle operation, allowing it to regulate 1.8 V output even when input drops to 2.5 V. At light loads, the device sustains regulation down to VI = VO + IO × rDS(on), where rDS(on) is ≤670 mΩ for the P-channel switch. This capability extends usable battery life in single-cell Li-ion systems, enabling operation until the battery reaches ~1.85 V under load - a key advantage over non-LDO buck converters.
How does the TPS62222DDCT manage efficiency at light load currents?
The TPS62222DDCT enters power-save mode below ~66 mA load, switching from fixed 1.25-MHz PWM to pulse-frequency modulation (PFM) with reduced switching frequency and 15 µA typical quiescent current. This mode uses dynamic voltage positioning - holding output 0.8% above nominal - to minimize voltage droop during sudden load steps. The TPS62222DDCT achieves up to 85% efficiency at 1 mA and >90% at 10 mA, significantly outperforming forced-PWM alternatives in standby power budgets.
What is the recommended inductor value and DC resistance for the TPS62222DDCT?
Texas Instruments specifies 4.7 µH as the minimum inductor value for the TPS62222DDCT, with 10 µH recommended for fixed-output versions. Inductor DC resistance should be minimized to reduce conduction losses - typical values are <150 mΩ for 4.7 µH and <250 mΩ for 10 µH chip inductors. The TPS62222DDCT's 880 mA current limit allows use of smaller, lower-RDC inductors without saturation risk, directly improving full-load efficiency and thermal performance.
TPS62222DDCT 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):
- 1.8V
- 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
TPS62222DDCT FAQ
1.How can I place an order for TPS62222DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62222DDCT 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 TPS62222DDCT reliable?
The price and inventory of TPS62222DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62222DDCT is usually 5 days.
3.What payment methods are accepted for TPS62222DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62222DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62222DDCT?
TPS62222DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62222DDCT 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 TPS62222DDCT?
For technical support, including TPS62222DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62222DDCT requirements.
6.How does Aetrix verify that TPS62222DDCT is sourced from the original manufacturer or authorized distributors?
All TPS62222DDCT 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 TPS62222DDCT meets industry standards.
7.What is the process for return or replacement of TPS62222DDCT?
All TPS62222DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62222DDCT, 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 TPS62222DDCT part is unused and in its original packaging.
Return procedure for TPS62222DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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