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Texas Instruments TPS564257DRLR
- Part No.:
- TPS564257DRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TPS564257DRLR.pdf
- Description:
- IC REG BUCK ADJ 4A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:3,240
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Product details
Overview
TPS564257DRLR from Texas Instruments is a 4-A synchronous buck converter in SOT-563 package, operating from 3 V to 17 V input and delivering 0.6 V to 10 V output with ±1% reference accuracy at 25°C, 600-kHz fixed-frequency operation in FCCM mode, and integrated 55.0-mΩ/24.3-mΩ MOSFETs - used for stable point-of-load regulation in Wi-Fi access points and smart speakers.
For engineers reviewing the TPS564257DRLR datasheet, TPS564257DRLR pinout, TPS564257DRLR application, or TPS564257DRLR equivalent, key selection considerations include FCCM-mode ripple control, 1.6-mm × 1.6-mm SOT-563 footprint, D-CAP3™ fast transient response, and prebiased-start capability for reliable system power-up sequencing.
Technical Context
The TPS564257DRLR implements D-CAP3™ adaptive on-time control with internal ripple emulation, enabling stable regulation with ceramic or low-ESR POSCAP output capacitors without external compensation. Its FCCM mode enforces continuous conduction across all load conditions, maintaining fixed 600-kHz switching frequency and minimizing output voltage ripple.
FCCM operation enables negative inductor current detection via NOC protection (trip threshold 1.7–2.8 A), while large-duty-cycle support up to 97% allows high VIN/VOUT ratios (e.g., 12 V → 10 V) with frequency foldback to ~200 kHz. Thermal shutdown triggers at 155°C with 20°C hysteresis, and UVLO activates at 2.92 V (rising) with 200-mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports wide industrial and consumer DC bus voltages including 5 V, 12 V, and 15 V rails. |
| Output Current | 4 A continuous - delivers full rated current without derating at TJ ≤ 125°C with proper PCB thermal design. |
| Switching Frequency | 600 kHz (typical, FCCM mode) - enables compact magnetics and predictable EMI profile across full load range. |
| Reference Voltage | 600 mV ±1% at 25°C - ensures precise output regulation with minimal feedback divider error contribution. |
| Quiescent Current | 370 µA (no load, FCCM mode) - balances light-load efficiency against frequency stability in fixed-frequency operation. |
| MOSFET RDS(on) | 55.0 mΩ (HS), 24.3 mΩ (LS) at 25°C - minimizes conduction loss and enables >90% peak efficiency at 12 V → 3.3 V conversion. |
| Soft-Start Time | 1.6 ms (fixed internal) - prevents inrush current and ensures monotonic output ramp during power-up. |
Pinout & Package
TPS564257DRLR is housed in a 1.6-mm × 1.6-mm, 6-pin SOT-563 (DRL) package with exposed thermal pad for enhanced thermal performance (RθJA_effective = 74°C/W on 2-layer EVM board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Connects to 3–17 V source; requires local 10-µF ceramic decoupling to GND for noise suppression and loop stability. |
| SW (Pin 2) | Power switch node | Drives external inductor; high dv/dt node requiring tight layout and minimal trace area to reduce EMI and ringing. |
| GND (Pin 3) | Ground reference | Common return for power and control circuits; must be connected to low-impedance ground plane under IC body. |
| PG (Pin 4) | Open-drain power-good | Asserts low when FB falls below 85% of VREF; requires external pull-up for system monitoring or sequencing. |
| EN (Pin 5) | Enable control | Active-high logic input; 1.19 V typical rising threshold enables precise UVLO coordination with upstream supplies. |
| FB (Pin 6) | Feedback input | Monitors output via resistor divider; connects directly to VREF comparator - no external compensation needed. |
Key Features
| Feature | Design Value |
|---|---|
| FCCM (Forced Continuous Conduction Mode) | Maintains fixed 600-kHz switching frequency across 0–4 A load, reducing output voltage ripple and simplifying EMI filtering. |
| D-CAP3™ Control Architecture | Enables stable operation with zero-external-compensation design and compatibility with ultra-low-ESR ceramic capacitors. |
| Integrated Bootstrap Capacitor | Eliminates external bootstrap capacitor and diode, reducing BOM count and enabling single-layer PCB implementation. |
| Prebiased Output Startup | Supports safe start-up when output is precharged - avoids reverse current flow and potential damage to downstream circuitry. |
| NOC (Negative Overcurrent) Protection | Detects and limits negative inductor current during FCCM light-load operation, preventing output overvoltage and ensuring regulation integrity. |
Applications
| WLAN/Wi-Fi Access Point Power | Smart Speaker Core Rail |
|---|---|
Use Scenario: Supplies 3.3-V or 5-V rail to Wi-Fi SoC and RF front-end in enterprise access points with bursty traffic loads. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 4-A peak current with fast transient response to handle MAC layer activity surges. Use Value: FCCM mode ensures consistent ripple and timing behavior during low-traffic standby, avoiding audible noise and enabling deterministic RF performance. |
Use Scenario: Powers DSP, audio codec, and voice assistant processor in battery-backed or AC-powered smart speakers. IC Role / Device Role / Timing Role: High-efficiency buck converter regulating core logic voltage with soft-start coordination for clean system boot. Use Value: Integrated bootstrap and D-CAP3™ enable compact, low-noise power delivery in space-constrained enclosures without compensation tuning. |
| SSD Controller Supply | Electricity Meter MCU Rail |
Use Scenario: Generates 1.05-V or 1.2-V supply for NAND flash controller and DRAM buffer in portable SSDs. IC Role / Device Role / Timing Role: High-density synchronous buck providing tightly regulated low-voltage rail with minimal footprint. Use Value: 1.6-mm × 1.6-mm SOT-563 package and 97% max duty cycle support efficient 12-V-to-1.05-V conversion in thermally constrained modules. |
Use Scenario: Delivers 3.3-V MCU and sensor interface rail in Class 0.2 electricity meters requiring long-term reliability and wide temperature operation. IC Role / Device Role / Timing Role: Industrial-grade DC/DC regulator operating continuously from –40°C to 125°C junction temperature. Use Value: Non-latch UVLO, OVP/UVP, and thermal shutdown ensure fail-safe behavior in unattended metering deployments with no field service access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS564252DRLR | Eco-mode operation; quiescent current 100 µA vs. 370 µA; variable frequency at light load. | Better light-load efficiency but higher output ripple; unsuitable where fixed-frequency EMI control is required. | Select TPS564252DRLR only when system spends >70% time at <100 mA load and ripple is not critical. |
| TPS564255DRLR | OOA mode; switches above 25 kHz at light load to avoid audio-band noise; same quiescent current (370 µA). | Designed for noise-sensitive audio systems; lacks NOC protection and FCCM's ripple consistency. | Choose TPS564255DRLR for pro-audio or microphone-equipped devices where audible switching noise must be eliminated. |
Compared with TPS564252DRLR and TPS564255DRLR, the TPS564257DRLR uniquely guarantees fixed-frequency operation and NOC-protected FCCM behavior - making it the sole choice for applications demanding predictable ripple, deterministic EMI, and stable light-load regulation without audio artifacts.
Availability
TPS564257DRLR is available at Aetrix Electronics and suitable for WLAN access points, smart speakers, and electricity meters requiring stable component supply, long-lifecycle assurance, and production-ready qualification.
Supply support for TPS564257DRLR 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 TPS56425x family was designed for space-constrained, high-density power delivery in consumer and industrial edge devices - emphasizing integration, ease of use, and robust protection without external compensation.
FAQ
What is the switching frequency behavior of the TPS564257DRLR across load conditions?
The TPS564257DRLR operates in Forced Continuous Conduction Mode (FCCM), maintaining a fixed 600-kHz switching frequency from 0 A to 4 A output current. Unlike Eco-mode or OOA variants, it does not reduce frequency at light load - ensuring consistent EMI profile and minimized output voltage ripple across all operating conditions. This behavior is confirmed in Figure 6-11 of the SLUSEQ6A datasheet.
Does the TPS564257DRLR support startup with a prebiased output voltage?
Yes, the TPS564257DRLR supports prebiased output startup. When the FB pin voltage exceeds the internal reference at power-on, the device delays switching until the internal soft-start ramp rises above the present FB level - preventing reverse current flow through the low-side FET and protecting downstream circuitry. This feature is explicitly documented in Section 7.3.3 of the datasheet.
What protection features are implemented in the TPS564257DRLR?
The TPS564257DRLR integrates non-latching UVLO (2.92 V rising threshold), overvoltage protection (110–120% VREF trip), undervoltage protection with hiccup restart (55–65% VREF), cycle-by-cycle overcurrent (4.1–6.7 A valley limit), negative overcurrent (NOC) protection (1.7–2.8 A), and thermal shutdown (155°C). All protections reset automatically after fault removal, except UVP which enters hiccup mode with 14-ms enable delay.
Can the TPS564257DRLR operate at high duty cycles, such as 12 V input to 10 V output?
Yes, the TPS564257DRLR supports up to 97% duty cycle operation. When VIN/VOUT < 1.6 (e.g., 12 V → 10 V), the controller smoothly reduces switching frequency down to ~200 kHz to extend tON and maintain regulation - verified in Figure 6-9 of the datasheet. This enables high-efficiency operation in high-VIN/VOUT ratio applications without external components.
Is an external bootstrap capacitor required for the TPS564257DRLR?
No, the TPS564257DRLR integrates the bootstrap capacitor internally. This eliminates the need for an external capacitor and diode, reduces BOM count, simplifies layout, and enables single-layer PCB designs - a key differentiator highlighted in the "Ease of use" section of the datasheet and confirmed in the functional block diagram (Figure 7-2).
TPS564257DRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP3™
- 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):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 4A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
TPS564257DRLR FAQ
1.How can I place an order for TPS564257DRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS564257DRLR 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 TPS564257DRLR reliable?
The price and inventory of TPS564257DRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS564257DRLR is usually 5 days.
3.What payment methods are accepted for TPS564257DRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS564257DRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS564257DRLR?
TPS564257DRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS564257DRLR 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 TPS564257DRLR?
For technical support, including TPS564257DRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS564257DRLR requirements.
6.How does Aetrix verify that TPS564257DRLR is sourced from the original manufacturer or authorized distributors?
All TPS564257DRLR 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 TPS564257DRLR meets industry standards.
7.What is the process for return or replacement of TPS564257DRLR?
All TPS564257DRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS564257DRLR, 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 TPS564257DRLR part is unused and in its original packaging.
Return procedure for TPS564257DRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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