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Texas Instruments TPS561201DDCT
- Part No.:
- TPS561201DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS561201DDCT.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,562
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Product details
Overview
TPS561201DDCT from Texas Instruments is a 1-A synchronous step-down DC-DC converter in a 6-pin SOT-23 (DDC) package, designed for compact, high-efficiency power conversion in space-constrained applications. It operates from 4.5 V to 17 V input, delivers adjustable output from 0.76 V to 7 V, employs D-CAP2™ control for fast transient response, and uses pulse-skip mode to maintain >85% efficiency at light loads-ideal for powering SoCs and FPGAs in digital consumer electronics.
For engineers reviewing the TPS561201DDCT datasheet, TPS561201DDCT pinout, TPS561201DDCT application, or TPS561201DDCT equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, real-world application mappings, and two rigorously cross-checked alternative parts with documented functional and operational distinctions.
Technical Context
The TPS561201DDCT implements adaptive on-time D-CAP2™ control with internal compensation, enabling stable operation with ultra-low-ESR ceramic or polymer output capacitors without external loop components. Its valley-current-based cycle-by-cycle overcurrent protection and hiccup-mode fault recovery ensure robustness under sustained overload.
It integrates 140-mΩ high-side and 84-mΩ low-side MOSFETs, supports pre-biased soft-start, features fixed 1.0-ms soft-start timing, and operates with non-latching UVLO (4.0–4.3 V turn-on), thermal shutdown (160°C), and ±2% VFB accuracy at 25°C-optimized for cost-sensitive, thermally constrained embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 17 V - supports wide-input industrial and consumer rails including 5 V, 9 V, 12 V, and 15 V supplies. |
| Output Current | 1 A continuous - sufficient for powering core logic of mid-tier processors, DDR memory termination, and FPGA I/O banks. |
| Switching Frequency | 580 kHz - enables use of small 2.2 µH inductors and reduces EMI filtering complexity while maintaining efficiency. |
| VFB Accuracy | ±2% at 25°C - ensures tight output regulation (e.g., ±21 mV at 1.05 V), critical for low-voltage digital rail stability. |
| Shutdown Current | <10 µA - minimizes standby power loss in battery-backed or always-on subsystems. |
| Thermal Protection | Non-latch thermal shutdown at 160°C with 25°C hysteresis - prevents permanent damage during transient overloads without requiring system reset. |
| Control Mode | Pulse-skip (Eco-mode) - automatically transitions from CCM to discontinuous conduction at light load, sustaining >80% efficiency down to 1 mA output. |
Pinout & Package
SOT-23-6 (DDC) package, 1.6 mm × 2.9 mm body size, 0.95 mm max height, exposed pad not present - compatible with standard SMT reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal ground reference | Common return path for low-side FET source and controller circuitry; feedback ground must tie here to avoid noise coupling. |
| SW (Pin 2) | Switch node | Connection point between high- and low-side FETs; requires tight layout to minimize ringing and EMI. |
| VIN (Pin 3) | Main input supply | Drain terminal of high-side FET; must be decoupled with ≥10 µF ceramic capacitor close to pin. |
| VFB (Pin 4) | Feedback input | Monitors output voltage via resistor divider; 0.768 V internal reference sets output: VOUT = 0.768 × (1 + R1/R2). |
| EN (Pin 5) | Enable control | Active-high logic input (1.6 V threshold); pulled high internally via ~300 kΩ resistor - allows simple ON/OFF sequencing. |
| VBST (Pin 6) | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 0.1 µF ceramic capacitor between VBST and SW pins. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control architecture | Enables stable regulation with zero-ESR ceramic capacitors and eliminates need for external compensation network. |
| Pulse-skip Eco-mode | Maintains >82% efficiency at 10 mA load (VIN = 12 V, VOUT = 1.05 V), reducing quiescent power in standby states. |
| Pre-biased soft-start | Allows safe startup into pre-charged output rails without reverse current flow or output overshoot. |
| Cycle-by-cycle overcurrent limit | Triggers hiccup-mode protection at 1.2–2.0 A peak switch current, limiting fault energy and enabling self-recovery. |
| Non-latch UVLO & TSD | Shuts down at VIN < 3.6 V or junction temperature > 160°C, then auto-restarts when conditions normalize - no manual reset required. |
Applications
| Digital TV Power Supply | High-Definition Blu-ray™ Player |
|---|---|
Use Scenario: Powers SoC core voltage (1.05 V/1 A) and DDR3 memory termination (1.5 V) in slim-profile flat-panel TVs. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated, low-noise core rail with fast load-step response to video processing bursts. Use Value: D-CAP2™ control achieves <15 mV undershoot during 1-A load steps, eliminating need for oversized output capacitance. |
Use Scenario: Supplies 3.3 V/1 A to servo motor drivers and 1.2 V/1 A to MPEG-4 decoder ASIC in BD-ROM players. IC Role / Device Role / Timing Role: Dual-rail generation using single IC per rail; pulse-skip mode maintains <15 µA system standby current during disc idle. Use Value: 580-kHz switching enables compact 2.2 µH inductor and 22 µF ceramic output caps, reducing board area by 35% vs legacy solutions. |
| Digital Set-Top Box (STB) | Surveillance Camera System |
Use Scenario: Generates 1.8 V/1 A for QAM demodulator and 5 V/0.5 A for HDMI interface in cable/satellite STBs. IC Role / Device Role / Timing Role: Secondary buck stage following front-end AC-DC adapter; handles dynamic load changes from channel switching and UI rendering. Use Value: ±2% VFB accuracy ensures compliance with ATSC/DOCSIS voltage tolerance specs across –40°C to 125°C junction range. |
Use Scenario: Provides 1.05 V/1 A to image sensor ISP and 3.3 V/0.3 A to Wi-Fi module in IP security cameras with PoE+ input. IC Role / Device Role / Timing Role: Point-of-load regulator operating from intermediate 5 V rail derived from PoE PD controller. Use Value: 90.8°C/W θJA enables full 1-A operation at 70°C ambient without heatsink, simplifying enclosure thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS561208DDCT | Same package and pinout; operates in continuous conduction mode (CCM) instead of pulse-skip; higher light-load quiescent current (590 µA vs 380 µA typical). | Better suited for constant-load applications like clock generators; less optimal for battery-backed or sleep-mode systems. | Select TPS561208DDCT when output ripple stability under light load is prioritized over efficiency. |
| MP2307DN-LF-Z | 3.3–18 V input, 1.5 A output, 500 kHz fixed frequency, requires external compensation; no pre-biased start-up support. | Lacks D-CAP2™ simplicity and Eco-mode; needs additional RC network for loop stability with ceramic caps. | Choose MP2307DN-LF-Z only if lower BOM cost outweighs design time and layout sensitivity trade-offs. |
Compared with TPS561201DDCT, TPS561208DDCT offers superior light-load ripple control but sacrifices 30–40% efficiency below 50 mA; MP2307DN-LF-Z demands more design effort for stability yet provides higher peak current headroom for transient surges.
Availability
TPS561201DDCT is available at Aetrix Electronics and suitable for digital TV power supply, HD Blu-ray player, and surveillance camera applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for TPS561201DDCT 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-reliability power conversion ICs.
The TPS56120x product line was engineered specifically for space-constrained, cost-sensitive consumer electronics requiring simple, efficient, and robust point-of-load regulation - emphasizing minimal external components, fast transient response, and seamless integration into high-volume manufacturing.
FAQ
What is the maximum output current capability of the TPS561201DDCT?
The TPS561201DDCT is rated for 1 A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 12 V, VOUT = 1.05 V). Its cycle-by-cycle overcurrent limit triggers at 1.2–2.0 A peak switch current, and thermal shutdown activates at 160°C junction temperature to protect against sustained overload. Derating is required above 70°C ambient.
Does the TPS561201DDCT support pre-biased output startup?
Yes, the TPS561201DDCT supports pre-biased soft-start: when the output capacitor is already charged, the device delays switching until the internal reference voltage exceeds the sensed VFB level, preventing reverse current flow and ensuring monotonic ramp-up without output voltage overshoot or undershoot.
What is the purpose of the VBST pin on the TPS561201DDCT?
The VBST pin on the TPS561201DDCT supplies the gate drive voltage for the integrated high-side MOSFET. A 0.1-µF ceramic capacitor must be placed between VBST and SW pins to form a bootstrap charge pump; this configuration enables efficient high-side FET switching without requiring a separate floating supply rail.
How does the D-CAP2™ control mode improve design simplicity for the TPS561201DDCT?
D-CAP2™ control in the TPS561201DDCT eliminates the need for external compensation components by embedding adaptive on-time modulation and internal ripple injection. This allows stable operation with ultra-low-ESR ceramic or polymer output capacitors - reducing bill-of-materials count, PCB area, and design validation effort compared to traditional voltage-mode or current-mode controllers.
Can the TPS561201DDCT operate with an input voltage below 4.5 V?
No - the absolute minimum recommended input voltage for the TPS561201DDCT is 4.5 V. Its UVLO circuit disables operation when VIN falls below 3.3–3.6 V (hysteresis), and reliable regulation cannot be guaranteed below 4.5 V due to insufficient headroom for the integrated high-side FET's RDS(on) and control circuitry. Operation below spec risks instability or shutdown.
TPS561201DDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 1A
- Frequency - Switching:
- 580kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS561201DDCT FAQ
1.How can I place an order for TPS561201DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS561201DDCT 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 TPS561201DDCT reliable?
The price and inventory of TPS561201DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS561201DDCT is usually 5 days.
3.What payment methods are accepted for TPS561201DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS561201DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS561201DDCT?
TPS561201DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS561201DDCT 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 TPS561201DDCT?
For technical support, including TPS561201DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS561201DDCT requirements.
6.How does Aetrix verify that TPS561201DDCT is sourced from the original manufacturer or authorized distributors?
All TPS561201DDCT 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 TPS561201DDCT meets industry standards.
7.What is the process for return or replacement of TPS561201DDCT?
All TPS561201DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS561201DDCT, 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 TPS561201DDCT part is unused and in its original packaging.
Return procedure for TPS561201DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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