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Texas Instruments TPS563240DDCT
- Part No.:
- TPS563240DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS563240DDCT.pdf
- Description:
- IC REG BUCK ADJ 3A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:666
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Product details
Overview
TPS563240DDCT from Texas Instruments is a 3-A synchronous step-down voltage regulator in SOT-23-6 (DDC) package, featuring D-CAP3™ adaptive on-time control, 1.4-MHz fixed-frequency operation, and integrated 70-mΩ high-side / 30-mΩ low-side MOSFETs. It delivers regulated output voltages from 0.6 V to 7 V across 4.5–17 V input range and supports pre-biased startup-ideal for powering core logic rails in compact networking and consumer electronics.
For engineers reviewing the TPS563240DDCT datasheet, TPS563240DDCT pinout, TPS563240DDCT application, or TPS563240DDCT equivalent, key selection considerations include its 1.7-ms internal soft-start, hiccup-mode overcurrent protection, >25-kHz light-load pulse-skip operation, 1% VFB accuracy at 25°C, and thermal shutdown at 160°C-critical for reliable power delivery in space-constrained, thermally demanding designs.
Technical Context
The TPS563240DDCT implements D-CAP3™ mode control-a proprietary adaptive on-time architecture that combines internal ripple injection with pseudo-fixed frequency operation to enable stable regulation using ultra-low-ESR ceramic or polymer output capacitors without external compensation. Its one-shot timer dynamically adjusts on-time proportional to VIN and inversely to VOUT, maintaining ~1.4 MHz nominal switching frequency across input and load variations.
It operates in three functional modes: continuous conduction mode (CCM) above ~0.5 A, Eco-mode pulse-skipping below CCM threshold while sustaining >25 kHz switching, and standby mode when EN is pulled low (<10 µA shutdown current). Protection includes cycle-by-cycle overcurrent limit (5.5–7.1 A high-side, 3.1–4.7 A low-side), non-latching UVP (65% of VOUT), and thermal shutdown with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous, 3.5 A peak transient-supports CPU/GPU core rail loads with margin. |
| Input Voltage Range | 4.5 V to 17 V-compatible with 5 V, 12 V, and 15 V intermediate bus architectures. |
| Switching Frequency | 1.4 MHz nominal-enables small external inductors (e.g., 1.5 µH for 3.3 V/3 A) and reduces EMI filtering burden. |
| Feedback Accuracy | ±1% at 25°C (594–606 mV)-ensures tight output regulation for sensitive digital loads. |
| Quiescent Current | 235–300 µA in operation, <10 µA in shutdown-extends battery life in always-on subsystems. |
| Thermal Protection | Non-latch thermal shutdown at 160°C with 25°C hysteresis-prevents permanent damage during sustained overload. |
| Package | SOT-23-6 (DDC), 1.6 mm × 2.9 mm-fits high-density PCB layouts with minimal footprint. |
Pinout & Package
SOT-23-6 (DDC) package: 1.6 mm × 2.9 mm body, 0.95 mm height, 0.95 mm pitch, exposed pad not present. RoHS-compliant, moisture sensitivity level (MSL) 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power and signal ground reference | Common return path for controller, low-side FET source, and feedback network-must be connected at single-point near VFB to minimize noise coupling. |
| SW | Switch node | Connection between high- and low-side FETs; carries high di/dt square wave-requires short, low-inductance routing to minimize EMI and voltage spikes. |
| VIN | Main input supply | Drain of high-side FET and primary power input; requires local 10-µF ceramic decoupling within 3 mm of pin. |
| VFB | Feedback input | Monitors output via resistor divider; 600-mV reference enables precise VOUT setting-input bias current <±50 nA minimizes divider error. |
| EN | Enable control | Active-high logic input (1.27–1.34 V threshold rising); internal 800–1200 kΩ pull-down allows direct MCU GPIO control without external resistor. |
| VBST | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 0.1-µF ceramic capacitor between VBST and SW-critical for proper high-side turn-on. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Enables stable operation with zero-ESR ceramic capacitors and eliminates need for external compensation network-reducing BOM count and layout complexity. |
| Pulse-skip Eco-mode | Maintains >25 kHz minimum switching frequency under light load-avoids audible noise while preserving >85% efficiency at 10 mA output. |
| Pre-biased soft start | Allows safe startup into pre-charged output rails without reverse current flow-essential for hot-swap and multi-rail sequencing applications. |
| Hiccup-mode OCP | Shuts down for 25 ms after overcurrent detection then auto-restarts-protects against sustained shorts without latching off permanently. |
| Integrated power FETs | 70-mΩ high-side + 30-mΩ low-side RDS(on) at 25°C-delivers >90% efficiency at 3 A/5 V with minimal thermal derating in SOT-23. |
Applications
| TV & Set-Top Boxes | Broadband Modems |
|---|---|
Use Scenario: Powering SoC core voltage (e.g., ARM Cortex-A series) and DDR memory interface rails in compact entertainment devices. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator delivering tightly regulated 0.9 V–1.2 V at up to 3 A with fast transient response to dynamic CPU load changes. Use Value: D-CAP3™ control ensures <50 mV output deviation during 2-A load steps, reducing required output capacitance by 30% versus traditional voltage-mode controllers. |
Use Scenario: Generating 3.3 V and 5 V rails for Ethernet PHYs, Wi-Fi modules, and flash memory in residential gateways. IC Role / Device Role / Timing Role: Secondary DC-DC converter stepping down 12 V intermediate bus to isolated system I/O and peripheral supplies. Use Value: 1.4-MHz switching enables use of 1.5 µH inductors and 22 µF ceramic output caps-cutting solution size by 40% vs. 500-kHz alternatives. |
| Wireless Access Points | IP Surveillance Cameras |
Use Scenario: Supplying 1.8 V and 2.5 V rails to RF front-end ICs and baseband processors in dual-band 802.11ac/ax access points. IC Role / Device Role / Timing Role: High-efficiency POL regulator operating from PoE-derived 5–12 V input with strict thermal constraints in sealed enclosures. Use Value: 117.1°C/W junction-to-ambient thermal resistance allows full 3-A operation at 65°C ambient-no heatsink required in typical AP thermal profiles. |
Use Scenario: Powering image sensor, ISP, and video encoder subsystems in outdoor IP cameras with wide temperature (-40°C to 125°C) operation. IC Role / Device Role / Timing Role: Main system regulator supporting cold-start from automotive-grade 12 V supply with robust UVLO (4.4 V wake-up). Use Value: Non-latching UVP and thermal shutdown prevent lockup during brownout or overheating-ensuring automatic recovery without host intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2332GJ-Z (Monolithic Power) | 2.5-A rating, 2-MHz switching, 65/35 mΩ FETs, no pre-bias startup support | Lacks hiccup-mode OCP and VFB accuracy spec; requires external soft-start capacitor | Preferred for higher-frequency, lower-current designs where board area is more critical than transient performance. |
| RT7297BGS (Richtek) | 3-A rating, 1.5-MHz switching, 75/35 mΩ FETs, 1.2% VFB accuracy, no Eco-mode | Operates only in CCM/PWM mode-light-load efficiency drops below 25 kHz, risking audible noise | Selected when strict fixed-frequency operation is required and light-load acoustic performance is not critical. |
Compared with MP2332GJ-Z and RT7297BGS, the TPS563240DDCT provides superior light-load efficiency via Eco-mode, tighter VFB accuracy, and integrated pre-bias startup-making it optimal for applications requiring seamless power sequencing and silent operation across full load range.
Availability
TPS563240DDCT is available at Aetrix Electronics and suitable for TV power systems, broadband modem subsystems, and wireless access point designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS563240DDCT 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 TPS563240DDCT belongs to TI's D-CAP3™ family of easy-to-use synchronous buck regulators, designed specifically for space-constrained, cost-sensitive applications in consumer, networking, and industrial equipment where minimal external components and robust transient response are essential.
FAQ
What is the maximum continuous output current of the TPS563240DDCT?
The TPS563240DDCT delivers 3 A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 4.5–17 V). Its peak transient capability reaches 3.5 A, enabled by low RDS(on) FETs (70 mΩ high-side, 30 mΩ low-side) and optimized thermal design in the SOT-23-6 package. Derating applies above 85°C ambient per the 117.1°C/W θJA specification.
Does the TPS563240DDCT support startup into a pre-biased output?
Yes, the TPS563240DDCT supports pre-biased soft start. When the EN pin is asserted high and the VFB voltage exceeds the internal reference (600 mV), the device delays switching until the reference ramps above VFB-preventing reverse current flow and ensuring controlled ramp-up. This behavior is confirmed in Section 7.3.4 of the SLVSE74A datasheet and validated across –40°C to 125°C.
What protection features does the TPS563240DDCT include?
The TPS563240DDCT integrates cycle-by-cycle overcurrent limit (5.5–7.1 A high-side, 3.1–4.7 A low-side), hiccup-mode OCP with 25-ms restart delay, non-latching undervoltage protection (65% VOUT threshold), thermal shutdown at 160°C with 25°C hysteresis, and UVLO with 4.4-V wake-up/3.8-V shutdown thresholds. All protections are fully specified in Section 6.5 of the datasheet.
Can the TPS563240DDCT operate with ceramic output capacitors only?
Yes, the TPS563240DDCT is explicitly designed for ceramic output capacitors. Its D-CAP3™ control architecture uses internal ripple injection to maintain stability with ultra-low-ESR ceramics-eliminating the need for bulk electrolytic or tantalum capacitors. Recommended values range from 10 µF to 44 µF depending on VOUT, as detailed in Table 2 of the datasheet.
What is the switching frequency behavior under light load conditions?
The TPS563240DDCT maintains switching frequency above ~25 kHz in Eco-mode pulse-skip operation-even at 10 mA load-by dynamically reducing on-time in 30-µs intervals to avoid audible noise. Below ~1 mA, frequency decreases linearly toward zero. This behavior is characterized in Figure 18 and described in Section 7.3.3 of SLVSE74A.
TPS563240DDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP3™
- 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):
- 0.6V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS563240DDCT FAQ
1.How can I place an order for TPS563240DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS563240DDCT 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 TPS563240DDCT reliable?
The price and inventory of TPS563240DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS563240DDCT is usually 5 days.
3.What payment methods are accepted for TPS563240DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS563240DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS563240DDCT?
TPS563240DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS563240DDCT 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 TPS563240DDCT?
For technical support, including TPS563240DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS563240DDCT requirements.
6.How does Aetrix verify that TPS563240DDCT is sourced from the original manufacturer or authorized distributors?
All TPS563240DDCT 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 TPS563240DDCT meets industry standards.
7.What is the process for return or replacement of TPS563240DDCT?
All TPS563240DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS563240DDCT, 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 TPS563240DDCT part is unused and in its original packaging.
Return procedure for TPS563240DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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