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Texas Instruments TPS5618PWP
- Part No.:
- TPS5618PWP
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS5618PWP.pdf
- Description:
- IC REG CTRLR DSP 1OUT 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,616
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Product details
Overview
TPS5618PWP from Texas Instruments is a synchronous-buck hysteretic regulator controller optimized for DSP power delivery. It delivers a fixed 1.8 V output with ±1% accuracy over 0°C to 125°C, supports 11.4–13 V VCC input, integrates 2-A high- and low-side MOSFET drivers, and features active deadtime control and programmable soft-start. It is used in high-efficiency point-of-load converters for digital signal processors.
For engineers reviewing the TPS5618PWP datasheet, TPS5618PWP pinout, TPS5618PWP application, or TPS5618PWP equivalent, key selection criteria include its 1.8 V fixed output, hysteretic control architecture with user-selectable hysteresis, integrated 2-A drivers with bootstrap/ground-referenced configuration options, power-good monitoring, and overvoltage/overcurrent protection with deglitching.
Technical Context
The TPS5618PWP implements a hysteretic voltage-mode control loop centered on a buffered 1.8 V reference (VREFB), with hysteresis set externally via resistor divider on VHYST. Propagation delay from VSENSE to driver outputs is ≤250 ns, enabling fast transient response without external compensation.
It integrates dual 2-A gate drivers-HIGHDR and LOWDR-with internal 8-V gate-voltage regulation, configurable high-side drive (bootstrap or ground-referenced), active shoot-through prevention via LOHIB crossover logic, and dedicated current-sense circuitry sampling high-side FET RDS(on) for OCP and IOUT reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% over 0°C to 125°C junction temperature - ensures stable core supply for DSPs without external feedback resistors. |
| VCC Input Range | 11.4 V to 13 V - designed for 12-V intermediate bus systems with tight UVLO (10 V start, 2 V hysteresis). |
| Driver Output Current | 2 A peak sink/source per driver - directly drives low-RDS(on) n-channel MOSFETs without external buffers. |
| Hysteresis Control | User-selectable via VHYST pin; max 60 mV window - enables load-transient optimization without loop compensation. |
| Power Good Threshold | 93% of nominal output (1.674 V) - open-drain PWRGD asserts low during undervoltage, supporting system sequencing. |
| OCP Trip Point | 100 mV at OCP pin - adjustable threshold for overcurrent shutdown with 3-μs deglitch for noise immunity. |
| Propagation Delay | ≤250 ns (VSENSE to HIGHDR/LOWDR) - enables sub-100 ns load-step response in buck topologies. |
Pinout & Package
TPS5618PWP is housed in a 28-pin TSSOP PowerPad™ (PWP) package with exposed thermal pad for enhanced power dissipation. The package supports surface-mount assembly and provides 1150 mW power rating at 25°C ambient, derating to 460 mW at 85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IOUT | Current-sense output | Provides voltage proportional to high-side FET conduction current (2 × RDS(on) × IOUT) for OCP and telemetry. |
| VSENSE | Feedback input | Direct connection to converter output bus; RC filter recommended to reject switching noise and stabilize regulation. |
| HIGHDR / LOWDR | Gate drive outputs | 2-A capable drivers for high- and low-side n-MOSFETs; support floating bootstrap or ground-referenced configurations. |
| BOOT / BOOTLO | Bootstrap supply interface | BOOT connects to bootstrap capacitor; BOOTLO ties to phase node (floating) or DRVGND (ground-referenced) to configure drive topology. |
| PWRGD | Power-good monitor | Open-drain output pulled low when VOUT drops below 93% of 1.8 V - used for system enable/disable sequencing. |
| INHIBIT | Enable/UVLO input | TTL-compatible digital enable with 2.1 V startup threshold and 100 mV hysteresis; also monitors 3.3 V/5 V logic rail for sequencing. |
| OCP | Overcurrent protection input | Accepts voltage divider from IOUT to ANAGND; trips at 100 mV to disable drivers and latch fault until VCC reset. |
| SLOWST | Soft-start timing | Capacitor-to-ANAGND sets ramp time; charging current derived from VREFB, enabling precise control of output voltage rise. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectifier driver | Integrated 2-A LOWDR eliminates external synchronous rectifier controller, enabling >90% efficiency in compact buck designs. |
| Active deadtime control | Prevents shoot-through by enforcing minimum off-time between HIGHDR and LOWDR transitions using LOHIB phase-node sensing. |
| Programmable hysteresis | VHYST pin accepts resistor divider from VREFB to ANAGND, allowing fine-tuning of regulation window (up to 60 mV) for transient performance. |
| High-side current sensing | Internal sample-and-hold circuit measures high-side FET RDS(on) voltage during conduction, enabling accurate OCP without sense resistors. |
| Overvoltage protection | OVP disables drivers if VOUT exceeds 115% of 1.8 V (2.07 V); latched fault cleared only after VCC falls below UVLO threshold. |
Applications
| DSP Core Power Supply | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Providing tightly regulated 1.8 V supply to TI C54x/C6000-series DSP cores with rapid load transients. IC Role / Device Role / Timing Role: Hysteretic controller regulating buck stage; VSENSE closes feedback loop; HIGHDR/LOWDR drive external MOSFETs. Use Value: ±1% output accuracy over temperature and 250 ns propagation delay minimize voltage droop during 10-A/μs load steps. |
Use Scenario: Generating isolated 1.8 V rail for analog front-end ADCs and FPGA I/O banks in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck controller with PWRGD signaling system readiness; INHIBIT coordinates with 5 V logic rail startup. Use Value: Programmable soft-start prevents inrush current into downstream capacitors; OCP protects against shorted sensor inputs. |
| Telecom Line Card | Test Equipment Signal Generator |
|
Use Scenario: Powering 1.8 V SERDES interfaces in multi-port telecom line cards requiring high PSRR and low noise. IC Role / Device Role / Timing Role: Fixed-output buck controller with VREFB-buffered reference and RC-filtered VSENSE for noise rejection. Use Value: 2-A drivers support low-inductance layouts; hysteresis tuning reduces switching frequency variation under load changes. |
Use Scenario: Supplying clean 1.8 V bias to RF DACs and clock distribution ICs in automated test equipment where stability is critical. IC Role / Device Role / Timing Role: Precision voltage regulator with ±1% reference and power-good assertion before instrument calibration sequence begins. Use Value: Overvoltage protection prevents damage to sensitive RF components during startup faults or regulator instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous-buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS5615PWP | Fixed 1.5 V output; identical architecture, pinout, and feature set except output voltage setting. | Used where 1.5 V core supply is required instead of 1.8 V - no layout change needed, only feedback network omission. | Select when target SoC/FPGA requires 1.5 V core voltage; shares same thermal and timing behavior. |
| TPS5625PWP | Fixed 2.5 V output; same hysteretic control, driver specs, and protection features as TPS5618PWP. | Applicable in mixed-voltage systems powering 2.5 V I/O rails or analog subsystems needing higher headroom than 1.8 V. | Choose for 2.5 V point-of-load needs; maintains identical sequencing, soft-start, and OCP implementation. |
Compared with TPS5615PWP and TPS5625PWP, the TPS5618PWP offers optimal voltage alignment for 1.8 V DSP cores and low-voltage FPGAs, while preserving identical driver strength, protection thresholds, and thermal design margins across the family.
Availability
TPS5618PWP is available at Aetrix Electronics and suitable for DSP power supplies, industrial PLC modules, telecom line cards, and test equipment requiring stable component supply and long-term production continuity.
Supply support for TPS5618PWP 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-reliability power conversion ICs.
The TPS56xx family was designed specifically for high-efficiency, low-noise synchronous-buck regulation in DSP and FPGA power applications, emphasizing precision voltage accuracy, fast transient response, and robust fault protection.
FAQ
What is the output voltage tolerance of the TPS5618PWP over temperature?
The TPS5618PWP delivers a fixed 1.8 V output with ±1% accuracy across the full operating junction temperature range of 0°C to 125°C, as specified in the electrical characteristics table under VREF for TPS5618. This tolerance is achieved via an internal temperature-compensated bandgap reference and resistive divider, eliminating need for external trimming.
Can the TPS5618PWP be configured for ground-referenced high-side drive?
Yes, the TPS5618PWP supports ground-referenced high-side drive by connecting BOOTLO to DRVGND and BOOT to either DRV or VCC. This configuration bypasses the bootstrap capacitor and simplifies layout in lower-frequency or lower-duty-cycle applications where floating gate drive is unnecessary.
How does the TPS5618PWP implement overcurrent protection?
The TPS5618PWP implements overcurrent protection using the IOUT pin's high-side FET RDS(on)-based current sense signal. An external resistor divider sets the trip threshold at the OCP pin, which triggers a latch-off event at 100 mV with 3-μs deglitching. The fault remains latched until VCC drops below the UVLO stop threshold (~7.5 V).
What is the purpose of the LOHIB pin on the TPS5618PWP?
The LOHIB pin on the TPS5618PWP provides active anti-cross-conduction control by sensing the phase node voltage (Vphase). It prevents simultaneous conduction of high- and low-side FETs by inhibiting LOWDR turn-on until Vphase falls below 2 V, thereby eliminating shoot-through current and associated power loss or device stress.
Does the TPS5618PWP require external compensation components?
No, the TPS5618PWP uses a hysteretic control architecture that does not require external compensation components. Its regulation loop is inherently stable due to the comparator-based switching decision and user-configurable hysteresis via the VHYST pin, eliminating loop compensation networks and simplifying design.
TPS5618PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, DSP
- Voltage - Input:
- 11.4V ~ 13V
- Number of Outputs:
- 1
- Voltage - Output:
- 1.8V
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPS5618PWP FAQ
1.How can I place an order for TPS5618PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5618PWP 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 TPS5618PWP reliable?
The price and inventory of TPS5618PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5618PWP is usually 5 days.
3.What payment methods are accepted for TPS5618PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5618PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5618PWP?
TPS5618PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5618PWP 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 TPS5618PWP?
For technical support, including TPS5618PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5618PWP requirements.
6.How does Aetrix verify that TPS5618PWP is sourced from the original manufacturer or authorized distributors?
All TPS5618PWP 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 TPS5618PWP meets industry standards.
7.What is the process for return or replacement of TPS5618PWP?
All TPS5618PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS5618PWP, 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 TPS5618PWP part is unused and in its original packaging.
Return procedure for TPS5618PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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