My Inquiry
My Account
Texas Instruments TPS62227DDCT
- Part No.:
- TPS62227DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62227DDCT.pdf
- Description:
- IC REG BUCK 1.2V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:128
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS62227DDCT from Texas Instruments is a high-efficiency, synchronous step-down DC-DC converter in TSOT23-5 package, delivering 1.2 V fixed output at up to 400 mA from 2.5–6 V input. It operates at 1.25 MHz PWM under medium-to-heavy load and transitions to power-save mode (PFM) at light load, achieving up to 95% efficiency and 15 µA quiescent current. It powers low-voltage DSPs and processors in portable media players and smart phones.
For engineers reviewing the TPS62227DDCT datasheet, TPS62227DDCT pinout, TPS62227DDCT application, or TPS62227DDCT equivalent, key selection criteria include fixed 1.2 V output accuracy (±3%), 100% duty-cycle low-dropout operation, soft-start functionality, dynamic output-voltage positioning, and compatibility with 4.7 µH inductors and 10 µF ceramic output capacitors.
Technical Context
The TPS62227DDCT uses voltage-mode control with input voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its internal digital self-calibration adjusts duty cycle in ~1% output voltage steps to maintain ±3% tolerance across line and load variations.
Under light load, it enters PFM power-save mode-reducing switching frequency and quiescent current to 15 µA typical-while maintaining regulation via comparator thresholds set at +0.8% (comp low) and +1.6% (comp high) above nominal output. At heavy load, it switches to fixed 1.25 MHz PWM with synchronous rectification and current-limit protection (600–880 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±3% over 2.5–6 V input and 0–400 mA load; enables direct supply to 1.2 V core rails without external feedback resistors. |
| Efficiency | Up to 95% at 200 mA; maintains >85% efficiency from 1 mA to 400 mA due to PFM/PWM seamless transition. |
| Quiescent Current | 15 µA typical in power-save mode; reduces battery drain in standby states of portable devices. |
| Switching Frequency | 1.25 MHz typical (0.8–1.85 MHz range); allows compact 4.7 µH inductor and 10 µF ceramic capacitor design. |
| Enable Threshold | EN high ≥1.3 V, low ≤0.4 V; supports direct connection to 1.8 V or 3.3 V GPIO without level-shifting. |
| Thermal Performance | 250 °C/W junction-to-ambient; rated for continuous 400 mW dissipation at TA ≤25 °C (derates to 160 mW at 85 °C). |
| Undervoltage Lockout | Activates below 1.5–2.0 V input; prevents erratic startup or MOSFET shoot-through during brownout. |
Pinout & Package
TPS62227DDCT is housed in a 5-pin TSOT23 (DDC) package - 2.9 mm × 1.6 mm × 0.8 mm, surface-mount, lead-free, RoHS-compliant. Pin 1 (VI) accepts 2.5–6 V input; Pin 2 (GND) is power ground; Pin 3 (EN) controls enable/disable; Pin 4 (FB) is internally connected to fixed 1.2 V reference (not user-adjustable); Pin 5 (SW) drives external 4.7 µH inductor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Input supply rail | Accepts 2.5–6 V; must be decoupled with ≥4.7 µF ceramic capacitor close to pin for stability and EMI suppression. |
| 2 - GND | Power ground reference | Low-impedance return path for input/output currents; requires solid thermal pad connection to PCB ground plane. |
| 3 - EN | Enable control input | Active-high logic; pull ≥1.3 V to enable; pull ≤0.4 V to enter shutdown (0.1 µA IQ); must not float. |
| 4 - FB | Feedback reference node | Internally tied to 0.5 V reference and resistor divider for 1.2 V output; no external components required for fixed version. |
| 5 - SW | Switch node | Drives external inductor; carries high di/dt square wave; requires short, low-inductance trace to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output-Voltage Positioning | Maintains output at +0.8% above nominal (1.2096 V) in light-load PFM mode, providing headroom to absorb transient droop during sudden load steps. |
| Synchronous Rectification | Integrates P-channel high-side and N-channel low-side MOSFETs (rDS(on) ≤670 mΩ / 540 mΩ @ 3.6 V), eliminating external Schottky loss and boosting efficiency. |
| Soft Start | Digital current-ramping sequence (83 → 167 → 335 → 670 mA) limits inrush current, preventing input rail collapse during startup from weak sources like batteries. |
| 100% Duty-Cycle Operation | Enables dropout as low as VOUT + IOUT × rDS(on)_P + IL × RDC(inductor); extends usable battery life down to ~1.3 V input for 1.2 V output. |
| Digital Self-Calibration | Adjusts duty cycle in discrete ~1% output voltage steps when VO deviates >±1.6%, achieving near-zero DC line/load regulation without external compensation. |
Applications
| Smartphone Application Processor Core Supply | Digital Camera Image Sensor Bias Rail |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.2 V at up to 400 mA peak current during burst processing. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator delivering low-noise, dynamically positioned 1.2 V with fast transient response. Use Value: Dynamic voltage positioning + 15 µA quiescent current extends standby time while maintaining core voltage integrity during rapid load transients. |
Use Scenario: Supplies bias voltage to CMOS image sensors in compact digital cameras where board space and thermal budget are constrained. IC Role / Device Role / Timing Role: Compact, high-efficiency step-down converter replacing linear regulators to reduce heat and extend battery runtime. Use Value: 95% peak efficiency and TSOT23-5 footprint enable single-layer PCB layout with minimal thermal derating in sealed camera enclosures. |
| Portable Media Player Audio Codec Supply | WLAN PC Card Baseband IC Power Rail |
Use Scenario: Provides clean 1.2 V supply to stereo audio codecs in MP3 players, where low noise and low quiescent current are critical. IC Role / Device Role / Timing Role: Low-noise POL regulator operating in PFM mode during playback pause to minimize background hiss and battery drain. Use Value: 15 µA IQ and integrated soft-start eliminate turn-on pop noise; synchronous design avoids switching ripple coupling into analog audio paths. |
Use Scenario: Powers baseband processors in mini-PCI WLAN cards with strict size and efficiency requirements in laptop expansion slots. IC Role / Device Role / Timing Role: Space-constrained DC-DC converter supporting 2.5–6 V input from host 3.3 V or battery rails. Use Value: TSOT23-5 package and 4.7 µH/10 µF BOM allow full regulator implementation within 12 mm² footprint, meeting mini-PCI mechanical constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DDCT | Same 5-pin TSOT23 package, 1.2 V fixed output, but higher 2.5–6.5 V input range and 3.5 MHz switching frequency. | Supports wider input range and enables smaller 2.2 µH inductors; optimized for ultra-compact designs where board area is more constrained than efficiency. | Select TPS62231DDCT when requiring <10 mm² solution size and faster transient response; verify thermal performance at 400 mA with 3.5 MHz switching losses. |
| AP63202WS5-7 | 1.2 V fixed output, 2.5–5.5 V input, 2 A capability, SOT23-5 package, but lacks dynamic voltage positioning and digital self-calibration. | Higher current headroom and lower rDS(on) MOSFETs; suited for future-proofing or multi-rail systems where 400 mA margin is insufficient. | Choose AP63202WS5-7 if system load may exceed 400 mA or if cost sensitivity outweighs need for PFM-mode optimization and precision regulation. |
Compared with TPS62227DDCT, TPS62231DDCT offers higher switching frequency for smaller passives but reduced efficiency at light load due to fixed-frequency operation, while AP63202WS5-7 provides greater current capacity at the expense of tighter output voltage accuracy (±4%) and no dynamic voltage positioning.
Availability
TPS62227DDCT is available at Aetrix Electronics and suitable for smartphone processor core supplies, digital camera sensor bias rails, portable media player audio codec power, WLAN PC card baseband ICs, and other space-constrained, battery-powered applications requiring stable component supply and long-term lifecycle support.
Supply support for TPS62227DDCT 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 electronics.
The TPS6222x family was designed specifically for ultra-low-power, space-constrained portable systems-such as PDAs, smart phones, and digital cameras-requiring high-efficiency step-down conversion with minimal external components and robust light-load performance.
FAQ
What is the output voltage tolerance of the TPS62227DDCT over temperature and load?
The TPS62227DDCT delivers 1.2 V output with ±3% tolerance across –40°C to 85°C ambient temperature and 0–400 mA load current, verified per electrical characteristics table in the SLVS491E datasheet. This specification holds for input voltages from 2.5 V to 6 V and includes effects of line regulation (0.26%/V) and load regulation (0.0014%/mA). The device achieves this via internal digital self-calibration that adjusts duty cycle in ~1% output voltage steps.
Does the TPS62227DDCT require external feedback resistors to set its output voltage?
No, the TPS62227DDCT does not require external feedback resistors. It is the fixed 1.2 V output variant of the TPS6222x family; the FB pin is internally connected to a precision 0.5 V reference and an integrated resistor divider, eliminating the need for external components. In contrast, the adjustable TPS62220DDCT requires external R1/R2 to set VO = 0.5 V × (1 + R1/R2).
Can the TPS62227DDCT operate with a 3.3 V input and deliver 400 mA continuously?
Yes, the TPS62227DDCT supports continuous 400 mA output at 3.3 V input. Its recommended operating conditions specify 2.5–6 V input range and 400 mA maximum output current. Thermal analysis shows 160 mW power dissipation at 85°C ambient (per Dissipation Rating Table), well within the 220 mW rating for DDC package at that temperature. Efficiency exceeds 90% under these conditions.
What is the minimum inductor value compatible with the TPS62227DDCT?
The minimum recommended inductor value for the TPS62227DDCT is 4.7 µH, as specified in the APPLICATION INFORMATION section. Using smaller values risks instability or excessive ripple due to mismatch with the internal compensation network, which is optimized for L×C corner frequencies near 15.9 kHz (e.g., 10 µH × 10 µF). The datasheet explicitly warns against inductors below 4.7 µH for fixed-output versions.
How does the TPS62227DDCT achieve high efficiency at light load?
The TPS62227DDCT achieves high light-load efficiency by entering power-save mode (PFM), reducing switching frequency and quiescent current to 15 µA typical. In this mode, it regulates output using comparator thresholds (+0.8% and +1.6% above nominal) to gate pulses only when needed-minimizing switching losses while maintaining ±3% output accuracy. This contrasts with forced-PWM converters that sustain fixed-frequency losses even at microamp loads.
TPS62227DDCT 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
TPS62227DDCT FAQ
1.How can I place an order for TPS62227DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62227DDCT 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 TPS62227DDCT reliable?
The price and inventory of TPS62227DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62227DDCT is usually 5 days.
3.What payment methods are accepted for TPS62227DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62227DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62227DDCT?
TPS62227DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62227DDCT 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 TPS62227DDCT?
For technical support, including TPS62227DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62227DDCT requirements.
6.How does Aetrix verify that TPS62227DDCT is sourced from the original manufacturer or authorized distributors?
All TPS62227DDCT 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 TPS62227DDCT meets industry standards.
7.What is the process for return or replacement of TPS62227DDCT?
All TPS62227DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62227DDCT, 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 TPS62227DDCT part is unused and in its original packaging.
Return procedure for TPS62227DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS62227DDCT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
