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Texas Instruments TPS563231DRLT
- Part No.:
- TPS563231DRLT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TPS563231DRLT.pdf
- Description:
- IC REG BUCK ADJ 3A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:5,497
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Product details
Overview
TPS563231DRLT from Texas Instruments is a 3-A synchronous step-down DC-DC converter in SOT563 package, featuring D-CAP3™ control mode, 4.5–17-V input range, 0.6–7-V adjustable output, and integrated 95-mΩ/55-mΩ MOSFETs. It delivers high efficiency across load range and supports pre-biased startup for digital TV and STB power rails.
For engineers reviewing the TPS563231DRLT datasheet, TPS563231DRLT pinout, TPS563231DRLT application, or TPS563231DRLT equivalent, key selection criteria include its 600-kHz fixed-frequency operation, hiccup-mode overcurrent protection, 2% FB voltage accuracy at 25°C, low 12-µA shutdown current, and compatibility with ceramic/polymer output capacitors without external compensation.
Technical Context
The TPS563231DRLT implements adaptive on-time D-CAP3™ control, combining internal ramp injection and pseudo-fixed frequency operation to enable stable regulation with ultra-low-ESR ceramic capacitors. Its valley-current sensing enables cycle-by-cycle overcurrent limiting and hiccup-mode fault recovery.
It operates in three functional modes: continuous conduction (CCM) up to 3 A, discontinuous conduction (DCM) at light loads, and pulse-skip mode (PSM) for >85% efficiency at 10-mA loads. Thermal shutdown triggers at 160°C with 25°C hysteresis, and non-latching UVLO disables operation below 3.6-V VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 17 V - Supports wide industrial and consumer input rails including 5 V, 9 V, 12 V, and 15 V supplies. |
| Output Current | 3 A continuous - Delivers full rated current in CCM with thermal derating above 125°C junction temperature. |
| Switching Frequency | 600 kHz - Enables compact magnetics and predictable EMI profile; fixed in CCM, reduced in PSM. |
| Feedback Accuracy | ±2% at 25°C - Ensures tight output regulation for sensitive logic rails like DDR memory or SoC cores. |
| Shutdown Current | <12 µA - Minimizes standby power in always-on subsystems such as remote control receivers or network standby circuits. |
| High-Side RDS(on) | 95 mΩ - Limits conduction loss at 3-A load, contributing to >90% peak efficiency at 12-VIN/3.3-VOUT. |
| Low-Side RDS(on) | 55 mΩ - Reduces freewheeling losses and improves light-load efficiency in DCM/PSM operation. |
Pinout & Package
TPS563231DRLT uses a 6-pin SOT563 (DRL) package measuring 1.6 mm × 1.6 mm, optimized for space-constrained PCB layouts and thermal performance via exposed pad (GND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Connects to 4.5–17-V source; requires local 10-µF ceramic decoupling and 0.1-µF HF bypass to GND. |
| SW | Switch node | Drain-source connection point between internal HS and LS FETs; routes to inductor and bootstrap capacitor. |
| GND | Power ground | Internal connection to LS FET source; must tie directly to system ground plane with low-inductance path. |
| FB | Feedback input | Monitors output voltage via resistor divider; 600-mV reference enables precise VOUT setting (e.g., 3.3 V with 45.3 kΩ/10 kΩ). |
| EN | Enable control | Active-high logic input (1.13 V threshold); supports VIN tie-off or resistor-divider UVLO programming. |
| BST | Bootstrap supply | Supplies gate drive for HS FET; requires 0.1-µF ceramic capacitor between BST and SW pins. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Enables stable regulation with zero-ESR ceramic capacitors and eliminates need for external compensation network. |
| Pulse-skip mode (PSM) | Maintains >85% efficiency at 10-mA load, critical for low-power standby states in consumer electronics. |
| Pre-biased output startup | Allows safe ramp-up when output is already charged, preventing reverse current flow in multi-rail systems. |
| Hiccup-mode OCP | Shuts down for 24 ms after UVP detection, limiting average power dissipation during sustained short-circuit faults. |
| Non-latch UVLO & TSD | Auto-recovery after fault removal-no manual reset required-enhancing system robustness in unattended applications. |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Power supply for HDMI interface circuitry in digital TVs requiring clean 3.3-V rail with fast transient response to video data bursts. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator delivering up to 3 A with <5% output deviation during 3-A load steps. Use Value: D-CAP3™ control achieves <10-µs recovery time and eliminates need for external loop compensation components. | Use Scenario: Core voltage supply for SoC in high-definition Blu-ray disc players, operating from 12-V adapter with tight 1.05-V ±2% tolerance. IC Role / Device Role / Timing Role: Adjustable-output synchronous buck supplying 1.05-V core rail with soft-start and pre-bias support. Use Value: Internal 1.5-ms soft-start prevents inrush current; 600-kHz switching allows small 3.3-µH inductor and 47-µF ceramic output cap. |
| Application 3 | Application 4 |
Use Scenario: Standby power rail in digital set-top boxes where 5-V output must remain active during deep sleep with <15-µA quiescent draw. IC Role / Device Role / Timing Role: Always-on 5-V buck converter leveraging PSM and <12-µA shutdown current. Use Value: Achieves >75% efficiency at 1-mA load while maintaining regulated output without external biasing. | Use Scenario: Auxiliary 1.8-V supply for image sensor interface in IP surveillance cameras powered from PoE-derived 12-V bus. IC Role / Device Role / Timing Role: Compact 1.8-V regulator in 1.6-mm × 1.6-mm SOT563, supporting wide input variation and thermal stress. Use Value: 135.8°C/W θJA enables 3-A operation with minimal heatsinking; hiccup OCP protects against camera module shorts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS563201DRLR | Same SOT563 package, 3-A rating, but 4.5–17-V input and D-CAP2 control; lacks pre-bias startup and has higher 25-µA shutdown current. | Not suitable for systems requiring pre-charged output startup; lower light-load efficiency due to absence of PSM. | Select TPS563201DRLR only if D-CAP2 stability with polymer caps is preferred and pre-bias operation is unnecessary. |
| MP2332DJ-LF-Z | 3-A, 4.5–18-V input, SOT563, but uses constant-on-time control; 15-µA shutdown current, no hiccup OCP (latch-off only), 1.5% FB accuracy. | Lacks hiccup recovery-requires external reset after overcurrent; less robust in intermittent short scenarios typical in surveillance hardware. | Choose MP2332DJ-LF-Z only when latch-off protection is acceptable and tighter 1.5% FB accuracy outweighs hiccup-mode reliability needs. |
Compared with TPS563231DRLT, TPS563201DRLR trades pre-bias capability and ultra-low shutdown current for simpler D-CAP2 loop tuning, while MP2332DJ-LF-Z offers marginally better reference accuracy but sacrifices fault resilience with latch-off OCP instead of hiccup recovery.
Availability
TPS563231DRLT is available at Aetrix Electronics and suitable for digital TV power supply, high-definition Blu-ray disc player, and networking home terminal applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS563231DRLT 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 ICs, with decades of expertise in high-efficiency DC-DC conversion.
The TPS563231DRLT belongs to TI's D-CAP3™ family of easy-to-use synchronous buck regulators, designed specifically for space-constrained consumer and industrial applications demanding fast transient response and minimal external components.
FAQ
What is the recommended input capacitor configuration for TPS563231DRLT?
TI recommends a minimum 10-µF X5R/X7R ceramic capacitor placed adjacent to the VIN and GND pins, plus an additional 0.1-µF high-frequency ceramic capacitor directly from VIN to GND. The TPS563231DRLT datasheet specifies these values to suppress both bulk and high-frequency noise, ensuring stable operation under dynamic load conditions and preventing input voltage droop during high di/dt switching events.
Does TPS563231DRLT support output voltages below 1.0 V?
Yes, TPS563231DRLT supports output voltages as low as 0.6 V using the FB pin and external resistor divider. For example, a 0.8-V output can be achieved with RFBT = 20 kΩ and RFBB = 10 kΩ. The TPS563231DRLT maintains ±2% feedback accuracy across its full 0.6–7-V range at 25°C, enabling reliable low-voltage core rail generation for modern processors and FPGAs.
How does the hiccup-mode overcurrent protection work in TPS563231DRLT?
When TPS563231DRLT detects sustained output undervoltage (VFB < 65% of VREF) for 800 µs, it enters hiccup mode: shutting down for 24 ms before attempting restart. This cycle repeats until the fault clears. Unlike latch-off protection, this behavior limits average power dissipation and prevents thermal runaway during persistent shorts-critical for field-deployed equipment like STBs and surveillance cameras where manual reset is impractical.
Can TPS563231DRLT be used with all-ceramic output capacitors?
Yes, TPS563231DRLT is explicitly designed for use with ultra-low-ESR ceramic capacitors thanks to its D-CAP3™ control architecture, which injects internal ripple to maintain loop stability without requiring ESR-based damping. The TPS563231DRLT datasheet validates stable operation with 22-µF ×2 Murata GRM21BR61A226ME44L ceramics (3-mΩ ESR each), confirming compatibility with modern high-capacitance, low-profile MLCCs.
What is the thermal performance of TPS563231DRLT in a standard 2-layer PCB layout?
In a standard 2-layer PCB with 1-in² 2-oz copper pour connected to the GND pin, TPS563231DRLT achieves a junction-to-ambient thermal resistance (θJA) of 135.8°C/W. At 3-A load and 12-VIN/3.3-VOUT, this results in ~35°C junction rise above ambient-well within its –40°C to 125°C operating range. The TPS563231DRLT's SOT563 package relies on GND-pad thermal conduction, so adequate via count (≥4× 0.3-mm vias) beneath the exposed pad is essential for this performance.
TPS563231DRLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- 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:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
TPS563231DRLT FAQ
1.How can I place an order for TPS563231DRLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS563231DRLT 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 TPS563231DRLT reliable?
The price and inventory of TPS563231DRLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS563231DRLT is usually 5 days.
3.What payment methods are accepted for TPS563231DRLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS563231DRLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS563231DRLT?
TPS563231DRLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS563231DRLT 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 TPS563231DRLT?
For technical support, including TPS563231DRLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS563231DRLT requirements.
6.How does Aetrix verify that TPS563231DRLT is sourced from the original manufacturer or authorized distributors?
All TPS563231DRLT 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 TPS563231DRLT meets industry standards.
7.What is the process for return or replacement of TPS563231DRLT?
All TPS563231DRLT units undergo pre-shipment inspection (PSI). If there is an issue with TPS563231DRLT, 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 TPS563231DRLT part is unused and in its original packaging.
Return procedure for TPS563231DRLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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