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Texas Instruments TPS54626PWP
- Part No.:
- TPS54626PWP
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54626PWP.pdf
- Description:
- IC REG BUCK ADJ 6.5A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:630
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Product details
Overview
TPS54626PWP from Texas Instruments is a 6.5-A synchronous step-down DC/DC converter with integrated high-side (36 mΩ) and low-side (28 mΩ) N-channel MOSFETs, D-CAP2™ adaptive on-time control, and Auto-Skip Eco-mode™ for light-load efficiency. It operates from 4.5 V to 18 V input, delivers 0.76 V–5.5 V output, and targets high-efficiency power rails in digital TV, Blu-ray players, and STB applications.
For engineers reviewing the TPS54626PWP datasheet, TPS54626PWP pinout, TPS54626PWP application, or TPS54626PWP equivalent, key selection criteria include its 650-kHz pseudo-fixed switching frequency, cycle-by-cycle overcurrent protection, pre-biased soft start, power good output with 25–150 kΩ external resistor, and thermal shutdown at 165°C - all validated for industrial temperature range (–40°C to 85°C) in HTSSOP-14 with PowerPAD™.
Technical Context
The TPS54626PWP implements D-CAP2™ mode control using adaptive on-time PWM, where on-time is inversely proportional to VIN and proportional to VOUT to maintain ~650 kHz operation across input voltage variations. Its internal ramp compensates for ceramic capacitor ESR absence, enabling stable regulation without external compensation components.
It features dual PGND pins (8,9), dual VIN pins (13,14), and dual SW pins (10,11) to reduce current path impedance and improve thermal performance. The device integrates a 5-V linear regulator (VREG5) with ±3% accuracy, supplies internal logic, and powers the bootstrap circuit via internal diode from VREG5 to VBST.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer power buses including 5 V, 12 V, and 15 V rails. |
| Output Current | 6.5 A continuous - sufficient for core voltage regulation of SoCs and FPGAs in digital entertainment systems. |
| Switching Frequency | 650 kHz (pseudo-fixed) - enables compact magnetics and predictable EMI filtering while balancing efficiency and size. |
| High/Low-Side RDS(on) | 36 mΩ / 28 mΩ - minimizes conduction loss at full load; optimized for <50% duty cycle operation. |
| VFB Reference Accuracy | ±1.3% (751–779 mV over –40°C to 85°C) - ensures tight output voltage regulation across temperature for sensitive loads. |
| Soft Start Control | Adjustable via external capacitor (ISSC = 6 µA typ) - prevents inrush current and enables controlled ramp-up even with pre-biased outputs. |
| Thermal Shutdown | 165°C threshold with 35°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
TPS54626PWP is housed in a 14-pin HTSSOP package (PWP) with exposed thermal pad (PowerPAD™) requiring solder connection to PGND for thermal and electrical integrity. Package dimensions and thermal metrics (θJA = 40.5°C/W, θJCbot = 2.4°C/W) are optimized for high-power density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output voltage sense and discharge node | Connects directly to output rail; internal 100-Ω discharge FET activates during shutdown to safely collapse output voltage. |
| VFB (Pin 2) | Feedback input | Monitors divided output voltage; reference is 765 mV; supports ceramic-capacitor-based regulation without ESR dependency. |
| VREG5 (Pin 3) | 5-V internal LDO output | Powers internal logic and bootstraps VBST; requires 1-µF ceramic capacitor to GND; not active when EN = low. |
| SS (Pin 4) | Soft start timing control | Charged by 6-µA internal current source; sets startup ramp time; enables pre-biased start via controlled low-side gate activation. |
| GND (Pin 5) | Signal ground reference | Reference for analog circuitry; must be tied to PGND near IC to minimize noise coupling into feedback path. |
| PG (Pin 6) | Open-drain power good indicator | Asserts high after 1.7× soft-start time when VFB is within ±10% of target; requires external pull-up to VREG5 (25–150 kΩ). |
| EN (Pin 7) | Enable input (active-high) | Logic threshold: VENH = 1.6 V min; internal 200–800 kΩ pull-down; allows sequencing and standby control. |
| PGND1, PGND2 (Pins 8,9) | Power ground returns | Low-side MOSFET sources and current-sense inputs; must be connected to thermal pad and bulk ground plane with minimal impedance. |
| SW1, SW2 (Pins 10,11) | Switch node connections | Drain-source junctions of internal FETs; dual pins reduce trace inductance and improve thermal spreading under high ripple current. |
| VBST (Pin 12) | Bootstrap supply for high-side gate driver | Connected to SW via 0.1-µF ceramic capacitor; internal diode charges from VREG5; supports >90% duty cycle capability. |
| VIN1, VIN2 (Pins 13,14) | Main input power connections | Parallel paths for high-current input; must be decoupled with ≥10-µF ceramic + 0.1-µF local capacitor per pin to suppress switching noise. |
| PowerPAD™ (Backside) | Thermal and electrical ground | Exposed copper pad; must be soldered to PGND plane with ≥6 thermal vias (0.3-mm diameter) for θJCbot = 2.4°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables zero-external-compensation operation with ceramic output capacitors; achieves <10-µs transient response without loop tuning. |
| Auto-Skip Eco-mode™ | Reduces switching frequency at light load to cut quiescent current to <10 µA, extending battery life in always-on subsystems. |
| Pre-biased soft start | Prevents reverse current flow during startup when output is already biased; avoids system-level brownout or bus contention. |
| Cycle-by-cycle overcurrent protection | Monitors low-side FET voltage during conduction; triggers immediate shutdown if current exceeds 7.2–9.5 A threshold, protecting MOSFETs and inductor. |
| Output discharge function | Activates internal 100-Ω VO-to-PGND FET upon EN deactivation or fault, ensuring safe, rapid output collapse without external circuitry. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers main SoC and DDR memory rails in 4K UHD television platforms with dynamic load steps up to 6 A. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.05 V @ 6.5 A with <15-mV output ripple using 22-µF ceramic output caps. Use Value: D-CAP2™ fast transient response eliminates need for large bulk capacitance; Eco-mode cuts standby power below 10 µA, meeting Energy Star requirements. | Use Scenario: Supplies 3.3 V and 1.8 V rails to servo motor drivers, laser diode controllers, and video decoding ASICs in optical disc players. IC Role / Device Role / Timing Role: Dual-rail generation using two TPS54626PWP devices; one configured for 3.3 V/5 A, another for 1.8 V/6.5 A with independent soft start. Use Value: Dual VIN/SW/PGND pins reduce layout parasitics; thermal pad ensures reliable operation under sustained 50°C ambient in enclosed chassis. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Regulates 1.2 V core voltage for ARM-based gateway processors handling Wi-Fi 6 and DOCSIS 3.1 traffic aggregation. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with 650-kHz switching synchronized to system clock to avoid beat frequencies in RF-sensitive zones. Use Value: 36 mΩ/28 mΩ FETs achieve >92% peak efficiency at 1.2 V/4 A; VFB accuracy ±1.3% maintains processor stability across temperature swings. | Use Scenario: Delivers 5 V and 1.05 V rails to MPEG decoder, HDMI transmitter, and conditional access module in cable/satellite STBs. IC Role / Device Role / Timing Role: Main 5-V rail generator (TPS54626PWP in 5-V configuration) feeding downstream LDOs; 1.05-V rail directly powers DDR3 memory interface. Use Value: Power good output sequences downstream regulators; pre-biased soft start prevents corruption of stored decryption keys during cold boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYR | Same D-CAP2™ architecture but 6-A rating; 16-pin QFN with wettable flanks; lower RDS(on) (32/22 mΩ); no VREG5 output. | Preferred for space-constrained designs needing higher thermal performance; lacks integrated 5-V LDO, requiring external bias supply. | Select when board area is critical and thermal vias are feasible; avoid if VREG5-dependent bootstrap or logic supply is required. |
| MP2315DJ-LF-Z | 6-A monolithic buck with 4.5–28 V input; fixed 650-kHz frequency; no Eco-mode; 100-mA LDO output; different pinout and protection set. | Suitable for cost-sensitive industrial controls; lacks pre-biased soft start and output discharge; lower VFB accuracy (±2%). | Choose for simpler designs without stringent light-load efficiency or sequencing needs; verify PGND routing compatibility before layout. |
Compared with TPS54626PWP, TPS54620RGYR offers better thermal metrics and slightly higher current but removes VREG5 functionality, while MP2315DJ-LF-Z trades Eco-mode and precision regulation for lower BOM count and wider input range - making TPS54626PWP optimal for consumer electronics demanding balanced efficiency, accuracy, and feature integration.
Availability
TPS54626PWP is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player SoC rails, and networking home terminal voltage regulation requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54626PWP 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 TPS54626PWP belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for high-current, low-voltage point-of-load applications in consumer electronics where fast transient response, light-load efficiency, and small solution size are critical.
FAQ
What is the maximum continuous output current supported by the TPS54626PWP?
The TPS54626PWP supports 6.5 A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). This rating assumes use of the exposed PowerPAD™ thermally connected to a solid PGND plane with ≥6 thermal vias. Derating applies above 85°C ambient or with inadequate copper area.
Does the TPS54626PWP require external compensation components?
No, the TPS54626PWP uses D-CAP2™ adaptive on-time control and does not require external compensation components. Its internal architecture stabilizes operation with ceramic or low-ESR polymer output capacitors, eliminating the need for traditional Type II or III compensation networks typically used in voltage-mode or current-mode controllers.
How does the pre-biased soft start function work in the TPS54626PWP?
The TPS54626PWP initiates pre-biased soft start by detecting when the feedback voltage (VFB) exceeds the internal soft-start ramp. It then gradually increases low-side FET on-time cycle-by-cycle until reaching full duty, preventing reverse current flow from the pre-charged output and ensuring monotonic voltage ramp-up without disrupting downstream circuitry.
What is the purpose of the dual VIN and dual SW pins on the TPS54626PWP?
The dual VIN (Pins 13,14) and dual SW (Pins 10,11) pins reduce current path impedance and parasitic inductance in high-current paths. This improves thermal distribution, lowers voltage overshoot during switching transitions, and enhances EMI performance - especially critical for 6.5-A operation in compact consumer enclosures.
Can the TPS54626PWP operate with only ceramic output capacitors?
Yes, the TPS54626PWP is explicitly designed for ceramic output capacitors. Its D-CAP2™ control loop includes internal ripple injection to replace ESR-dependent feedback, enabling stable regulation with ultra-low-ESR ceramics (e.g., 22 µF X5R/X7R). Recommended values range from 22 µF to 68 µF per phase.
TPS54626PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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):
- 18V
- Voltage - Output (Min/Fixed):
- 0.765V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6.5A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS54626PWP FAQ
1.How can I place an order for TPS54626PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54626PWP 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 TPS54626PWP reliable?
The price and inventory of TPS54626PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54626PWP is usually 5 days.
3.What payment methods are accepted for TPS54626PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54626PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54626PWP?
TPS54626PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54626PWP 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 TPS54626PWP?
For technical support, including TPS54626PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54626PWP requirements.
6.How does Aetrix verify that TPS54626PWP is sourced from the original manufacturer or authorized distributors?
All TPS54626PWP 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 TPS54626PWP meets industry standards.
7.What is the process for return or replacement of TPS54626PWP?
All TPS54626PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54626PWP, 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 TPS54626PWP part is unused and in its original packaging.
Return procedure for TPS54626PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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