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Texas Instruments TPS563249DDCR
- Part No.:
- TPS563249DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS563249DDCR.pdf
- Description:
- IC REG BUCK ADJ 3A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,768
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Product details
Overview
TPS563249DDCR from Texas Instruments is a 3-A synchronous step-down DC-DC converter in a 6-pin SOT-23-THIN (DDC) package, featuring D-CAP3™ mode control, 1.4-MHz fixed switching frequency, 4.5–17-V input range, and 0.6–7-V adjustable output voltage. It integrates 70-mΩ high-side and 30-mΩ low-side MOSFETs and delivers up to 3 A continuous output current for point-of-load regulation in space-constrained networking equipment.
For engineers reviewing the TPS563249DDCR datasheet, TPS563249DDCR pinout, TPS563249DDCR application, or TPS563249DDCR equivalent, key selection criteria include its FCCM operation for EMI-sensitive systems, 1% VFB accuracy at 25°C, startup from pre-biased outputs, cycle-by-cycle overcurrent protection, and thermal shutdown with 160°C trip point.
Technical Context
The TPS563249DDCR employs adaptive on-time D-CAP3™ control with internal ripple injection, enabling stable operation with ultra-low-ESR ceramic capacitors without external compensation. Its one-shot timer sets on-time proportional to VIN and inversely proportional to VOUT, maintaining pseudo-fixed 1.4-MHz frequency across input and load variations.
FCCM operation ensures continuous inductor current down to zero load, eliminating frequency modulation artifacts. Protection includes hiccup-mode overcurrent (via valley-current sensing on low-side FET), non-latching UVP (65% of VOUT), UVLO (4.4-V turn-on), and thermal shutdown (160°C with 25°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports full-load operation in compact 1.6 mm × 2.9 mm SOT-23-THIN package without forced airflow. |
| Input Voltage Range | 4.5 V to 17 V - compatible with 5 V, 12 V, and 15 V intermediate bus architectures in networking and consumer electronics. |
| Switching Frequency | 1.4 MHz (typical) - enables use of sub-2 µH inductors and reduces EMI filter size while maintaining FCCM stability. |
| Feedback Accuracy | ±1% at 25°C - ensures precise output regulation for sensitive SoC core supplies (e.g., 0.9 V ±9 mV). |
| Shutdown Current | <10 µA - minimizes standby power loss in always-on subsystems such as router management controllers. |
| Thermal Resistance | RθJA = 117.1°C/W - requires minimal PCB copper area for thermal relief in single-layer or low-cost 2-layer designs. |
| Protection Features | Cycle-by-cycle OCL, hiccup-mode recovery, non-latching UVP & TSD - enables robust field operation without system-level watchdog intervention. |
Pinout & Package
SOT-23-THIN (DDC) package, 1.6 mm × 2.9 mm body size, 6-pin surface-mount configuration with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal ground reference | Common return path for low-side FET source, controller ground, and feedback network - must be star-connected to VFB for noise immunity. |
| SW (Pin 2) | Switch node | Drain connection of high-side FET and source of low-side FET - high dv/dt node requiring minimized loop area for EMI control. |
| VIN (Pin 3) | Main input supply | High-side FET drain and internal LDO input - requires local 10-µF ceramic decoupling placed adjacent to pin. |
| VFB (Pin 4) | Feedback input | Resistor-divider sense node referenced to 600 mV internal bandgap - connects to output via precision divider (e.g., 45.3 kΩ/10 kΩ for 3.3 V). |
| EN (Pin 5) | Enable control | Active-high logic input with 1.34 V typical threshold - tied to VIN for always-on operation or driven by MCU GPIO for sequencing. |
| VBST (Pin 6) | Bootstrap supply | High-side gate driver supply - requires 0.1 µF ceramic capacitor between VBST and SW to sustain gate drive during high-side conduction. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control architecture | Enables direct use of MLCC output capacitors without external compensation, reducing BOM count and layout sensitivity. |
| Forced Continuous Conduction Mode (FCCM) | Maintains constant 1.4-MHz switching under all loads - eliminates audible noise and simplifies EMI filtering design. |
| Pre-biased output startup | Allows safe ramp-up when output is pre-charged (e.g., hot-swap or rail-sharing systems), preventing reverse current flow. |
| Integrated power FETs | 70-mΩ high-side + 30-mΩ low-side RDS(on) - achieves >90% efficiency at 2 A/12 VIN/3.3 VOUT, minimizing external component count. |
| Fixed 1.7-ms soft-start | Controls inrush current during power-up - prevents input voltage droop and avoids false triggering of upstream UVLO circuits. |
Applications
| Wireless Router Core Supply | Surveillance Camera SoC Rail |
|---|---|
Use Scenario: Powering ARM-based SoC cores (e.g., Qualcomm IPQ series) requiring tightly regulated 0.9–1.2 V at up to 3 A peak current. IC Role / Device Role / Timing Role: Primary buck regulator delivering dynamic CPU/GPU voltage with fast transient response to handle burst workloads. Use Value: D-CAP3™ control achieves <50-µs recovery from 0→3-A load steps, maintaining output deviation within ±30 mV without external compensation. |
Use Scenario: Generating 1.8 V or 2.5 V for image signal processors (ISPs) and video codecs in outdoor IP cameras operating from 12-V PoE injectors. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load converter mounted directly on camera module PCB. Use Value: FCCM operation eliminates frequency jitter during motion-triggered processing bursts, ensuring clean clock domain power for ADCs and serializers. |
| Set-Top Box Memory Interface | Broadband Modem PHY Supply |
Use Scenario: Supplying DDR3/DDR4 termination and I/O rails (1.5 V, 1.35 V, 1.2 V) in cable/satellite STBs with strict standby power budgets. IC Role / Device Role / Timing Role: Secondary buck regulator activated only during active channel tuning or streaming sessions. Use Value: <10 µA shutdown current enables compliance with ENERGY STAR® 7.0 standby power limits (<0.5 W system-wide). |
Use Scenario: Providing 3.3 V or 5 V to DSL/DOCSIS PHY ICs in residential gateways where board space is constrained by RF shielding requirements. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping down from 12-V front-end to isolated PHY domains. Use Value: 1.4-MHz switching allows use of 1.5-µH shielded inductors under 3 mm height, fitting beneath metal RF cans without interference. |
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 |
|---|---|---|---|
| TPS563201DDCR | Same 3-A rating and D-CAP3™ control, but 4.5–17-V input and 0.6–7-V output; lacks pre-biased startup and has higher 15-µA shutdown current. | Not suitable for hot-swap or rail-sharing systems requiring pre-bias tolerance; acceptable for simpler always-on applications. | Select TPS563201DDCR only if pre-biased startup is unnecessary and marginally higher quiescent current is acceptable. |
| MP2332HGTL-Z | 3-A, 4.5–17-V input, 0.8–6.5-V output; uses constant-on-time control (not D-CAP3™); 25-µA shutdown current; no hiccup-mode OCP. | Requires external compensation for ceramic caps; less robust under sustained overload; lower integration (no integrated bootstrap diode). | Choose MP2332HGTL-Z only when cost is primary and design can accommodate added compensation components and reduced protection granularity. |
Compared with TPS563249DDCR, TPS563201DDCR trades pre-bias capability for identical footprint and control scheme, while MP2332HGTL-Z offers lower unit cost at the expense of control-loop flexibility, protection sophistication, and layout simplicity.
Availability
TPS563249DDCR is available at Aetrix Electronics and suitable for wireless routers, surveillance camera modules, set-top boxes, and broadband modems requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for TPS563249DDCR 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.
The TPS563249DDCR belongs to TI's D-CAP3™ family of easy-to-use synchronous buck regulators, designed specifically for space-constrained, high-transient applications in networking, consumer, and industrial edge devices.
FAQ
What is the minimum input voltage required for TPS563249DDCR to regulate 3.3 V output at 3 A?
The TPS563249DDCR requires a minimum input voltage of approximately 6.5 V to maintain regulation at 3.3 V/3 A due to its fixed 1.4-MHz frequency and minimum off-time limit. Below this, dropout occurs - as shown in Figure 7 of the datasheet - with output voltage decreasing linearly as VIN falls. This constraint arises from the device's adaptive on-time architecture and internal timing limits, not from FET RDS(on).
Does TPS563249DDCR support output voltages below 0.6 V?
No, the TPS563249DDCR does not support output voltages below 0.6 V. Its internal feedback reference is fixed at 600 mV (±1%), and the datasheet specifies an output voltage range of 0.6 V to 7 V. Attempting to set VOUT < 0.6 V via external resistor divider violates the guaranteed operating conditions and results in inaccurate regulation or instability.
Can TPS563249DDCR operate without a bootstrap capacitor?
No, TPS563249DDCR cannot operate without a 0.1-µF ceramic capacitor between VBST and SW pins. This capacitor provides the floating supply needed to drive the high-side MOSFET gate above VIN. Omitting it causes immediate failure of high-side switching, resulting in no output voltage or erratic behavior - as explicitly required in Section 8.2.2.4 of the datasheet.
What is the purpose of the "NOC" signal in the TPS563249DDCR functional block diagram?
The "NOC" (No Over-Current) signal in the TPS563249DDCR functional block diagram is an internal logic flag indicating that no overcurrent condition has been detected during the current switching cycle. It gates the one-shot timer reset and enables normal PWM operation; when NOC deasserts (i.e., OCL triggers), the controller enters hiccup mode or delays switching to protect the FETs - confirming real-time valley-current monitoring is active.
How does TPS563249DDCR achieve stability with zero-ESR ceramic capacitors?
The TPS563249DDCR achieves stability with zero-ESR ceramic capacitors via D-CAP3™ control's internal ripple injection circuit, which synthesizes a controlled AC signal to replace natural ESR-induced ripple. This injected ripple provides the necessary phase information for the control loop - eliminating reliance on capacitor ESR while maintaining >45° phase margin across all loads and input voltages.
TPS563249DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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
TPS563249DDCR FAQ
1.How can I place an order for TPS563249DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS563249DDCR 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 TPS563249DDCR reliable?
The price and inventory of TPS563249DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS563249DDCR is usually 5 days.
3.What payment methods are accepted for TPS563249DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS563249DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS563249DDCR?
TPS563249DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS563249DDCR 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 TPS563249DDCR?
For technical support, including TPS563249DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS563249DDCR requirements.
6.How does Aetrix verify that TPS563249DDCR is sourced from the original manufacturer or authorized distributors?
All TPS563249DDCR 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 TPS563249DDCR meets industry standards.
7.What is the process for return or replacement of TPS563249DDCR?
All TPS563249DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS563249DDCR, 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 TPS563249DDCR part is unused and in its original packaging.
Return procedure for TPS563249DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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