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Texas Instruments TPS54525PWP
- Part No.:
- TPS54525PWP
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54525PWP.pdf
- Description:
- IC REG BUCK ADJ 5.5A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,587
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Product details
Overview
TPS54525PWP from Texas Instruments is a 5.5-A synchronous step-down DC/DC converter with integrated high-side (63 mΩ) and low-side (33 mΩ) N-channel MOSFETs, operating from 4.5 V to 18 V input and delivering adjustable output voltage from 0.76 V to 5.5 V. It employs D-CAP2™ adaptive on-time control for fast transient response in digital TV, Blu-ray player, and STB power rails.
For engineers reviewing the TPS54525PWP datasheet, TPS54525PWP pinout, TPS54525PWP application, or TPS54525PWP equivalent, key selection criteria include its 650-kHz switching frequency, power-good output, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, and HTSSOP-14 thermal performance with θJA = 43.7°C/W.
Technical Context
The TPS54525PWP implements D-CAP2™ mode control-combining adaptive on-time PWM with internal compensation-to achieve stable regulation without external loop components while supporting ceramic and polymer output capacitors. Its proprietary circuit adapts to ultra-low-ESR capacitors by synthesizing ripple via an internal ramp, eliminating dependency on capacitor ESR for stability.
It operates in Forced Continuous Conduction Mode (FCCM), maintaining near-constant 650-kHz switching across load conditions, enabling predictable EMI filtering and consistent output ripple. Protection features include non-latching thermal shutdown (165°C), output overvoltage (125% trip), undervoltage (65% trip), and UVLO tied to the internal 5.5-V VREG5 rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 15 V rails. |
| Output Current | 5.5 A continuous - sufficient for powering multi-core SoCs, FPGAs, and DDR memory subsystems. |
| Switching Frequency | 650 kHz - enables compact magnetics and predictable EMI profile; pseudo-fixed via adaptive on-time control. |
| High-Side RDS(on) | 63 mΩ - minimizes conduction loss at high duty cycles; optimized for lower-VOUT applications. |
| Low-Side RDS(on) | 33 mΩ - reduces synchronous rectification losses during light-load and high-current operation. |
| Feedback Reference | 0.765 V ±2 mV - high-accuracy bandgap reference enables tight output regulation (±1%) with standard resistor dividers. |
| Shutdown Current | <10 μA - enables ultra-low-power standby in always-on system blocks. |
Pinout & Package
TPS54525PWP is housed in a thermally enhanced 14-pin HTSSOP package (5.00 mm × 6.40 mm) with exposed PowerPAD™ for efficient heat dissipation. The package is rated for –40°C to +85°C ambient operation and requires soldering of the thermal pad to PGND for optimal thermal performance (θJCbot = 4.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output discharge node | Internal 50-Ω MOSFET discharges output when EN is low or fault occurs-prevents floating rail during shutdown. |
| VFB (Pin 2) | Feedback input | Monitors output via resistor divider; 0.765-V reference enables precise VOUT programming from 0.76 V to 5.5 V. |
| VREG5 (Pin 3) | Internal 5.5-V regulator output | Supplies internal circuitry and can power external bias rails (≤5 mA); disabled when EN = low. |
| SS (Pin 4) | Soft-start timing | 6-μA current charges external capacitor; start-up time programmable per tSS = 1.1 × CSS / 6 μA. |
| GND (Pin 5) | Signal ground | Reference for control logic; must be tightly coupled to PGND planes to minimize noise coupling. |
| PG (Pin 6) | Open-drain power-good | Asserts after 1.7×tSS when VOUT is within ±10%; requires external pull-up to VREG5 (25–150 kΩ). |
| EN (Pin 7) | Enable input | Active-high logic interface (VENH = 1.6 V min); internal 440-kΩ pull-down ensures default disable. |
| PGND1/PGND2 (Pins 8,9) | Power ground returns | Low-side MOSFET source connections and current-sense return paths; must be joined to GND near IC. |
| SW1/SW2 (Pins 10,11) | Switch nodes | Connect to inductor; dual SW pins reduce layout parasitics and improve current sharing in high-current paths. |
| VBST (Pin 12) | Bootstrap supply | Charged via external capacitor from SWx; powers high-side gate driver; internal diode connects to VREG5. |
| VIN1/VIN2 (Pins 13,14) | Main input supply | Dual VIN pins reduce IR drop and improve thermal distribution; connect directly to bulk input capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables zero-external-compensation design with fast transient response (<10 µs recovery) and stable operation with ceramic capacitors. |
| Pre-biased soft start | Prevents reverse current flow during startup into pre-charged outputs-critical for hot-swap and multi-rail sequencing. |
| Integrated VREG5 regulator | Delivers regulated 5.5 V (±3%) from VIN ≥5.6 V; powers internal logic and supports external bias loads up to 5 mA. |
| Cycle-by-cycle overcurrent limit | Detects valley current during low-side conduction; trips at 6.1–8.4 A depending on temperature and layout-non-latching recovery. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and re-enables only after cooling by 35°C-prevents thermal runaway in enclosed systems. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers main SoC, video decoder, and HDMI interface from 12-V DC input in slim-profile flat-panel TVs. IC Role / Device Role / Timing Role: Primary 1.05-V/5.5-A buck regulator delivering clean, low-noise core voltage with <7-mVPP ripple. Use Value: D-CAP2™ control maintains regulation during rapid SoC load transients (e.g., scene changes), reducing required output capacitance by >40% vs. voltage-mode controllers. | Use Scenario: Supplies 1.2-V core and 3.3-V I/O rails for BD-ROM controller and audio DSP in portable Blu-ray players. IC Role / Device Role / Timing Role: Dual-output capable (with external feedback networks) for independent rail generation; FCCM mode ensures fixed-frequency ripple for EMI compliance. Use Value: Pre-biased soft start prevents output droop when battery-backed 3.3-V rail remains active during 1.2-V rail power-up-enabling glitch-free boot sequence. |
| Home Networking Terminal | Digital Set-Top Box (STB) |
Use Scenario: Regulates 1.8-V CPU core and 1.0-V DDR3 memory rails in cable/fiber gateway devices with 12-V wall adapter input. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with <10-μA shutdown current extends standby runtime in Energy Star–compliant designs. Use Value: Integrated 63-mΩ/33-mΩ FETs achieve >92% peak efficiency at 5-A load-reducing thermal load and eliminating need for heatsinks in fanless enclosures. | Use Scenario: Generates 1.05-V FPGA core voltage and 2.5-V I/O voltage in satellite/cable STBs operating from 12-V or 15-V DC input. IC Role / Device Role / Timing Role: Power-good output synchronizes FPGA configuration with stable rail; thermal shutdown protects against enclosure overheating during extended recording. Use Value: VREG5 output powers external level-shifters and reset supervisors-reducing BOM count by eliminating discrete LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54526PWP | Same HTSSOP-14 package and pinout; identical electrical specs except higher current limit (7.5 A typ) and tighter VFB accuracy (±0.5% vs ±0.8%). | Preferred for new designs requiring margin above 5.5-A nominal load or tighter output tolerance under line/load variation. | Select TPS54526PWP if long-term reliability under sustained 5.5-A load or tighter regulation is critical; otherwise TPS54525PWP remains cost-optimized. |
| MP2359DJ-LF-Z | Monolithic 5.5-A buck in 8-pin SOIC; 4.5–28-V input; fixed 600-kHz fSW; no VREG5 or PG output; lower integration (no pre-bias SS, no D-CAP2™). | Suitable for simpler, cost-sensitive applications where power-good signaling and pre-biased startup are not required. | Choose MP2359DJ-LF-Z only when footprint and BOM count are prioritized over advanced features like PG, VREG5, or D-CAP2™ transient performance. |
Compared with TPS54526PWP, the TPS54525PWP offers identical functionality at a lower current-limit margin and slightly relaxed VFB tolerance-making it ideal for cost-sensitive, thermally constrained designs where 5.5-A peak is sufficient. Against MP2359DJ-LF-Z, TPS54525PWP delivers superior system-level integration (PG, VREG5, pre-bias SS) and transient response, justifying its use in premium consumer electronics.
Availability
TPS54525PWP is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player subsystems, and STB core voltage regulation requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for TPS54525PWP 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 TPS54525PWP belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for high-transient, low-ESR-capacitor applications in consumer electronics where minimal external components and fast load-step response are essential.
FAQ
What is the maximum recommended output current for TPS54525PWP under continuous operation?
The TPS54525PWP is rated for 5.5-A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Derating is required above 85°C ambient; Figure 6-13 in the datasheet shows output current vs. ambient temperature curves. At 25°C ambient with 2-layer board and 1-in² copper pour, full 5.5-A load is sustainable without thermal shutdown.
Does TPS54525PWP support pre-biased output startup, and how does it work?
Yes, TPS54525PWP supports pre-biased soft start. When the output voltage exceeds the soft-start command level at power-up, the controller incrementally enables the low-side FET with narrow on-times-avoiding reverse current flow. This ensures smooth ramp-up without sinking charge from the pre-charged rail, making it suitable for hot-swap and multi-rail sequencing applications.
What is the purpose of the VREG5 pin on TPS54525PWP, and what load can it drive?
The VREG5 pin on TPS54525PWP provides a regulated 5.5-V output derived from VIN, used internally for control circuitry and optionally for external biasing. It delivers up to 5 mA with ±3% regulation and is disabled when EN is low. A 1-µF ceramic capacitor to PGND is mandatory for stability; exceeding 5 mA risks VREG5 droop and potential UVLO activation.
How does the power-good (PG) signal on TPS54525PWP behave during startup and fault conditions?
The PG signal on TPS54525PWP is an open-drain output that asserts high after 1.7× soft-start time when VOUT reaches ±10% of target. It pulls low if VFB falls below 85% of reference (UVP) or rises above 125% (OVP). An external pull-up resistor (25–150 kΩ) to VREG5 is required; no internal pull-up exists.
Can TPS54525PWP operate in forced continuous conduction mode (FCCM), and why is this important?
Yes, TPS54525PWP operates in Forced CCM mode by default, maintaining ~650-kHz switching across all load conditions-including light loads-by allowing negative inductor current. This ensures constant EMI profile and predictable output ripple, critical for noise-sensitive applications like audio processing and high-speed data interfaces where variable-frequency operation could interfere with system clocks.
TPS54525PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- 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):
- 0.76V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 5.5A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS54525PWP FAQ
1.How can I place an order for TPS54525PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54525PWP 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 TPS54525PWP reliable?
The price and inventory of TPS54525PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54525PWP is usually 5 days.
3.What payment methods are accepted for TPS54525PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54525PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54525PWP?
TPS54525PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54525PWP 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 TPS54525PWP?
For technical support, including TPS54525PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54525PWP requirements.
6.How does Aetrix verify that TPS54525PWP is sourced from the original manufacturer or authorized distributors?
All TPS54525PWP 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 TPS54525PWP meets industry standards.
7.What is the process for return or replacement of TPS54525PWP?
All TPS54525PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54525PWP, 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 TPS54525PWP part is unused and in its original packaging.
Return procedure for TPS54525PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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