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Texas Instruments TPS54526PWP
- Part No.:
- TPS54526PWP
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54526PWP.pdf
- Description:
- IC REG BUCK ADJ 5.5A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:470
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Product details
Overview
TPS54526PWP from Texas Instruments is a 5.5-A synchronous step-down DC/DC converter with D-CAP2™ control architecture, operating from 4.5 V to 18 V input and delivering adjustable output voltage from 0.76 V to 5.5 V. It integrates 63 mΩ high-side and 33 mΩ low-side N-channel MOSFETs, supports 650-kHz switching, and implements Auto-skip Eco-mode™ for sub-10 µA shutdown current-used in digital TV power supplies and Blu-ray player core rails.
For engineers reviewing the TPS54526PWP datasheet, TPS54526PWP pinout, TPS54526PWP application, or TPS54526PWP equivalent, key selection considerations include adaptive on-time transient response, ceramic-capacitor compatibility, pre-biased soft-start capability, power-good signaling, and thermal shutdown at 165°C with 35°C hysteresis.
Technical Context
The TPS54526PWP uses D-CAP2™ adaptive on-time control-eliminating external compensation while enabling fast load-step response via internal ramp injection and pseudo-fixed 650-kHz operation. Its control loop transitions seamlessly between PWM mode (heavy load) and Eco-mode™ (light load), maintaining stability with ultra-low-ESR ceramic or polymer output capacitors.
It features cycle-by-cycle valley-current limiting using low-side FET voltage sensing, non-latching over/under-voltage protection (125% OVP / 65% UVP), and integrated VREG5 5.5-V LDO (±20 mV line/load regulation) that powers internal circuitry and enables external biasing up to 5 mA-disabled when EN is low.
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 | Up to 5.5 A continuous - sufficient for FPGA core, SoC I/O, or ASIC logic rail applications. |
| Switching Frequency | 650 kHz typical - enables compact magnetics and predictable EMI profile without external clock synchronization. |
| High-Side RDS(on) | 63 mΩ at 25°C - reduces conduction loss in high-duty-cycle configurations (e.g., 3.3 V out from 12 V in). |
| Low-Side RDS(on) | 33 mΩ at 25°C - minimizes bottom-FET loss during freewheeling, improving light-load efficiency. |
| Shutdown Current | <10 µA - enables ultra-low-power standby in always-on consumer electronics. |
| Feedback Reference | 765 mV ±4 mV (–40°C to 85°C) - ensures tight output regulation across temperature with minimal resistor-divider error. |
| Power-Good Threshold | 90% of target VOUT (±5%) - provides reliable system sequencing and fault detection with 5 µs OVP delay. |
Pinout & Package
TPS54526PWP is housed in a thermally enhanced 14-pin HTSSOP (PWP) package (5.00 mm × 4.40 mm) with exposed PowerPAD™ for PCB-level heat dissipation. The package supports –40°C to 85°C ambient operation and achieves 43.7°C/W junction-to-ambient thermal resistance with standard 2-layer board layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output discharge node | Internal 50–100 Ω NMOS connects VO to PGND during shutdown-enables rapid output discharge without external components. |
| VFB (Pin 2) | Feedback input | Monitors resistor-divider output; 765-mV reference sets regulated VOUT; ±0.15 µA input bias minimizes divider error. |
| VREG5 (Pin 3) | Internal 5.5-V LDO output | Supplies internal logic and can bias external circuitry (≤5 mA); disabled when EN = low; requires 1-µF ceramic bypass to PGND. |
| SS (Pin 4) | Soft-start capacitor node | 6-µA constant current charges external capacitor; start time = 1.1 × CSS(nF) / 6; supports pre-biased startup via controlled low-side gate activation. |
| GND (Pin 5) | Signal ground reference | Reference for VFB, SS, PG, EN; must be tightly coupled to PGND near IC for noise immunity and accurate current sensing. |
| PG (Pin 6) | Open-drain power-good | Active-high after 1.7× soft-start time when VFB ≥90% target; sinks 5 mA max; requires external pull-up to VREG5 (25–150 kΩ). |
| EN (Pin 7) | Enable control input | Active-high logic interface (VENH = 1.6 V min); internal 220–880 kΩ pull-down enables default-disable behavior if left floating. |
| PGND1, PGND2 (Pins 8, 9) | Power ground returns | Low-side MOSFET source connections and current-sense inputs; must be joined to GND at single point near IC for accurate OCP. |
| SW1, SW2 (Pins 10, 11) | Switch node outputs | Connect to external inductor; carry high di/dt switching currents; require short, low-inductance routing to minimize ringing and EMI. |
| VBST (Pin 12) | Bootstrap supply for high-side gate | Charged via internal diode from VREG5; requires 0.1-µF ceramic capacitor from VBST to SW1/SW2 for gate drive integrity. |
| VIN1, VIN2 (Pins 13, 14) | Main input power rails | Parallel-connected 12-V tolerant inputs; accept bulk capacitance directly; support high-current path to high-side FET drains. |
| PowerPAD™ (Backside) | Thermal and electrical ground | Mandatory solder connection to PGND plane; primary thermal path-reduces θJA by >30% vs. non-thermal-pad packages. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates external compensation network while delivering <10-µs load-step response-ideal for dynamic SoC/FPGA core rails. |
| Eco-mode™ auto-skip operation | Reduces switching losses at light loads, sustaining >85% efficiency down to 10 mA output-critical for always-on standby circuits. |
| Integrated dual-N MOSFETs | 63 mΩ/33 mΩ RDS(on) pair enables >90% peak efficiency at 5 A without discrete driver or external FETs. |
| Pre-biased soft-start | Prevents reverse current flow during startup into pre-charged outputs-ensures safe hot-plug and rail sequencing in multi-rail systems. |
| Output discharge function | Active 50–100 Ω internal MOSFET pulls VO to PGND when disabled-removes need for external bleed resistors in safety-critical designs. |
| VREG5 5.5-V LDO | Stable internal bias rail with ±20 mV regulation-powers internal logic and supports external analog circuitry without secondary regulator. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player Core Rail |
|---|---|
Use Scenario: Powers main SoC, video decoder, and DDR memory in flat-panel TVs requiring stable 1.05 V/3.3 V rails with fast transient response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 5.5 A at 1.05 V with D-CAP2™ control ensuring <10 µs recovery from 2-A load steps. Use Value: Eliminates external compensation and reduces output capacitance by 40% vs. voltage-mode controllers-cutting BOM cost and board area. | Use Scenario: Supplies 1.2 V core and 3.3 V I/O rails for BD-ROM controller and HDMI transmitter in high-definition optical disc players. IC Role / Device Role / Timing Role: Dual-rail power solution leveraging VREG5 to bias auxiliary circuitry and PG signal for system reset coordination. Use Value: Pre-biased soft-start prevents output voltage droop during hot-insertion of optical modules-ensuring glitch-free media playback initialization. |
| Networking Home Terminal | Digital Set-Top Box (STB) |
Use Scenario: Regulates processor, PHY, and RF front-end voltages in DOCSIS 3.1 cable modems and gateway routers operating from 12-V DC input. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting Eco-mode™ to maintain >88% efficiency at 50 mA standby load-extending fanless operation. Use Value: 650-kHz fixed-frequency operation simplifies EMI filter design and meets FCC Class B conducted emission limits without shielding. | Use Scenario: Delivers 1.0 V, 1.2 V, and 3.3 V rails to MPEG decoder, tuner, and conditional access module in pay-TV STBs with thermal constraints. IC Role / Device Role / Timing Role: Thermally robust HTSSOP package with PowerPAD™ sustains 5.5-A output at 85°C ambient-enabling compact sealed enclosure designs. Use Value: Thermal shutdown at 165°C with 35°C hysteresis prevents latch-up during sustained overload-improving field reliability in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54528PWP | Same pinout, identical D-CAP2™ control, but rated for 6-A continuous output and 75-mΩ/35-mΩ FETs. | Supports higher current loads (e.g., next-gen SoCs) without layout change; marginally lower light-load efficiency due to larger FETs. | Select TPS54528PWP only when >5.5 A peak current is required; otherwise TPS54526PWP offers better cost/performance balance. |
| MP2359DJ-LF-P | Monolithic 5-A buck with 100-mΩ/70-mΩ FETs, 500-kHz fixed frequency, no Eco-mode™ or VREG5 output. | Lacks pre-biased soft-start, power-good, and internal bias rail-requires external components for sequencing and monitoring. | Choose MP2359DJ-LF-P for cost-sensitive, low-complexity designs where 5-A rating and basic regulation suffice. |
Compared with TPS54526PWP, TPS54528PWP delivers higher current headroom with identical footprint and feature set, while MP2359DJ-LF-P trades integration and advanced control for lower unit cost-making TPS54526PWP optimal for mid-range consumer power rails demanding reliability, efficiency, and ease of use.
Availability
TPS54526PWP is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player core rails, and networking home terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54526PWP 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 over 90 years of innovation in high-reliability electronic components.
The TPS545xx family was designed specifically for high-efficiency, low-component-count DC/DC conversion in space-constrained consumer electronics-emphasizing fast transient response, light-load efficiency, and seamless integration into multi-rail power architectures.
FAQ
What is the maximum output current supported by the TPS54526PWP?
The TPS54526PWP is rated for continuous output current up to 5.5 A under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Peak current capability depends on input/output voltage, ambient temperature, and layout; the device implements cycle-by-cycle overcurrent protection triggering at 6.1–8.4 A. Derating is required above 85°C ambient per the thermal characteristics table in the datasheet.
Does the TPS54526PWP support pre-biased output startup?
Yes, the TPS54526PWP supports pre-biased soft-start. When the output voltage is already present at startup, its internal circuitry gradually activates the low-side FET with narrow on-times, incrementing cycle-by-cycle until reaching normal duty-cycle operation-preventing reverse current flow and ensuring monotonic voltage ramp-up without output droop or overshoot.
What package type is used for the TPS54526PWP?
The TPS54526PWP uses the 14-pin HTSSOP (PWP) package with an exposed PowerPAD™ thermal pad measuring 5.00 mm × 4.40 mm. This package is distinct from the 16-pin QFN (RSA) variant and requires specific land pattern and solder stencil design per TI's SLVSEK3 application note to ensure thermal performance and reliability.
Can the TPS54526PWP operate with ceramic output capacitors?
Yes, the TPS54526PWP is explicitly optimized for ceramic output capacitors. Its D-CAP2™ control architecture and proprietary internal circuitry provide stability with ultra-low-ESR ceramics-eliminating the need for electrolytic or tantalum capacitors and reducing output ripple to as low as 7 mVPP at full load.
What is the purpose of the VREG5 pin on the TPS54526PWP?
The VREG5 pin on the TPS54526PWP provides a regulated 5.5-V output derived from the input supply, used internally to power control circuitry and UVLO comparators. It can also supply up to 5 mA of external current-e.g., for biasing feedback dividers or auxiliary logic-with ±20 mV line/load regulation. The pin is disabled when EN is low or open.
TPS54526PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 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):
- 0.76V
- 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
TPS54526PWP FAQ
1.How can I place an order for TPS54526PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54526PWP 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 TPS54526PWP reliable?
The price and inventory of TPS54526PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54526PWP is usually 5 days.
3.What payment methods are accepted for TPS54526PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54526PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54526PWP?
TPS54526PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54526PWP 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 TPS54526PWP?
For technical support, including TPS54526PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54526PWP requirements.
6.How does Aetrix verify that TPS54526PWP is sourced from the original manufacturer or authorized distributors?
All TPS54526PWP 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 TPS54526PWP meets industry standards.
7.What is the process for return or replacement of TPS54526PWP?
All TPS54526PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54526PWP, 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 TPS54526PWP part is unused and in its original packaging.
Return procedure for TPS54526PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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