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Texas Instruments TPS54110PWP
- Part No.:
- TPS54110PWP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54110PWP.pdf
- Description:
- IC REG BUCK ADJ 1.5A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,091
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Product details
Overview
TPS54110PWP from Texas Instruments is a 3-V to 6-V input, 1.5-A synchronous step-down DC/DC converter in a thermally enhanced 20-pin HTSSOP PowerPAD™ package. It delivers adjustable 0.9-V to 3.3-V output with ±1% reference accuracy, supports externally compensated loop design, and integrates high- and low-side MOSFETs for high-efficiency power conversion in space-constrained point-of-load applications.
For engineers reviewing the TPS54110PWP datasheet, TPS54110PWP pinout, TPS54110PWP application, or TPS54110PWP equivalent, key selection considerations include its 350/550 kHz fixed or 280–700 kHz adjustable switching frequency, integrated VBIAS regulator, undervoltage lockout (UVLO) with 2.95-V start threshold, power-good (PWRGD) open-drain output, and thermal shutdown at 150°C.
Technical Context
The TPS54110PWP implements a voltage-mode PWM control architecture with a high-performance error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and externally configurable compensation network. Its adaptive dead-time logic prevents shoot-through by sequencing high- and low-side MOSFET gate drivers with 300-mA source/sink capability.
Switching frequency is selectable via SYNC pin logic level (350 kHz or 550 kHz) or resistor-programmed RT pin (280–700 kHz), while internal slow-start (3.35 ms typical) and external capacitor extension provide controlled inrush current limiting. Protection includes cycle-by-cycle peak current limit (3.0–3.5 A trip), UVLO hysteresis (0.12 V), and thermal shutdown with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 6 V - supports direct regulation from 3.3-V or 5-V system rails without pre-regulation. |
| Output Current | 1.5 A continuous - sufficient for powering FPGAs, DSPs, and microprocessors at point-of-load. |
| Output Voltage Accuracy | ±1% over temperature and line/load - ensures stable core or I/O rail compliance for sensitive digital loads. |
| Switching Frequency | 350 kHz / 550 kHz fixed or 280–700 kHz adjustable - enables EMI optimization and inductor size trade-offs. |
| Reference Voltage | 0.891 V ±0.009 V - trimmed bandgap reference enabling precise output setting with external resistor divider. |
| Thermal Resistance | RθJA = 34.0 °C/W - validated for 20-pin HTSSOP PowerPAD™; requires PCB copper pour for full 1.5-A performance. |
| UVLO Threshold | 2.95 V start / 2.80 V stop - prevents erratic startup during brownout or soft-start of upstream supplies. |
Pinout & Package
TPS54110PWP is housed in a 20-pin HTSSOP (PWP) package measuring 6.50 mm × 4.40 mm with exposed PowerPAD™ thermal pad on underside for enhanced heat dissipation. The package requires soldering the PowerPAD™ to a large PCB copper area connected to PGND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Internally connects to precision analog circuitry; must be tied to PGND and PowerPAD™ with low-inductance path to minimize noise coupling. |
| VSENSE (Pin 2) | Error amplifier inverting input | Monitors feedback voltage from output divider; sets regulated output via 0.891-V reference. |
| COMP (Pin 3) | Error amplifier output | Drives external Type-II/III compensation network between COMP and VSENSE to stabilize control loop. |
| PWRGD (Pin 4) | Power-good open-drain output | Signals valid regulation when VSENSE ≥ 93% Vref; used for processor reset, supply sequencing, or fault indication. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Requires 0.022–0.1 µF ceramic capacitor to PH to generate floating gate drive voltage for high-side MOSFET. |
| PH (Pins 6–10) | Phase node | Switching node connecting internal MOSFETs to external inductor; high di/dt path requiring short, wide PCB traces. |
| RT (Pin 20) | Frequency set resistor input | Connects to AGND via resistor (68 kΩ–180 kΩ) to program switching frequency from 280 kHz to 700 kHz. |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-enable input (1.2 V threshold) and capacitor-based soft-start timing node to limit inrush current. |
| VBIAS (Pin 17) | Internal bias regulator output | Provides 2.7–2.9 V for internal circuitry; requires 0.1–1 µF ceramic bypass capacitor to AGND for stability. |
| VIN (Pins 14–16) | Main input supply | Power input for MOSFET switches and internal regulators; requires local 1–10 µF low-ESR ceramic bypass capacitors to PGND. |
| PGND (Pins 11–13) | Power ground return | High-current return path for low-side MOSFET and input/output capacitors; must connect directly to PowerPAD™ and bulk ground planes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | rDS(on) = 240–480 mΩ (high-side) and 345–690 mΩ (low-side) at 6 V VIN enables compact, high-efficiency 1.5-A buck conversion without external switches. |
| Externally compensated error amplifier | Supports flexible Type-II or Type-III compensation networks to optimize transient response and phase margin for diverse output filter configurations. |
| Programmable switching frequency | Three configuration modes - fixed 350/550 kHz or resistor-adjustable 280–700 kHz - allow EMI reduction and inductor size optimization. |
| Power-good (PWRGD) monitoring | Open-drain output asserts high only when VSENSE ≥ 93% Vref, VIN > UVLO, and SS/ENA enabled - enables reliable system power sequencing. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and restarts at 140°C - protects against sustained overload or inadequate heatsinking without latch-up. |
Applications
| Point-of-Load Regulation for FPGA Core Rails | Low-Voltage DSP Power Supply |
|---|---|
Use Scenario: Regulating 1.2-V core supply for Xilinx Artix-7 FPGA in industrial control module with tight board space and thermal constraints. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering up to 1.5 A at ±1% accuracy; provides fast transient response to dynamic core current demands. Use Value: Integrated MOSFETs and PowerPAD™ package reduce solution footprint by >40% vs discrete controller + external FETs; PWRGD signal coordinates FPGA configuration sequence. | Use Scenario: Generating 1.8-V I/O supply for TI C6748 DSP in broadband base station card operating at ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with programmable 550-kHz switching to minimize inductor size and meet EMI Class B limits. Use Value: Adjustable frequency and external compensation enable optimized loop stability across temperature; VBIAS pin powers external level-shifters without extra LDO. |
| Portable Computing System Rail | Optical Transceiver Bias Supply |
Use Scenario: Providing 3.3-V auxiliary rail for USB 3.0 controller and PCIe switch in ruggedized notebook design with battery-backed 5-V input. IC Role / Device Role / Timing Role: Secondary buck converter with UVLO (2.95 V) ensuring clean startup as battery voltage decays; SS/ENA enables coordinated power-up with main SoC. Use Value: 3.3-V output accuracy and fast transient response prevent USB enumeration failures; compact HTSSOP package fits under stacked connectors. | Use Scenario: Delivering stable 2.5-V bias for 10-Gbps SFP+ laser driver IC in telecom optical line card with strict ripple (<10 mVpp) requirements. IC Role / Device Role / Timing Role: Low-noise, high-PSRR synchronous buck supplying precision analog bias; uses external compensation to suppress switching noise at critical frequencies. Use Value: 0.891-V reference and ±1% accuracy ensure consistent laser bias across temperature; PWRGD confirms stable operation before enabling laser modulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54210PWP | 2-A output rating, identical pinout and feature set; higher current capability with same 3–6 V input range and 0.891-V reference. | Suitable where future-proofing for >1.5 A load or margin headroom is required; no layout change needed. | Select TPS54210PWP if peak load exceeds 1.5 A or long-term reliability margin is prioritized over cost. |
| MP2315DJ-LF-Z | Monolithic 2-A buck with 4.5–28 V input, fixed 500 kHz fSW, and different pinout; lacks PWRGD, VBIAS, and external compensation. | Better suited for wider-input industrial systems but requires redesign of feedback network and sequencing logic. | Choose MP2315DJ-LF-Z only when input voltage exceeds 6 V or when simplified fixed-frequency design outweighs need for precision sequencing. |
Compared with TPS54110PWP, TPS54210PWP offers higher current headroom in identical packaging, while MP2315DJ-LF-Z trades flexibility (no PWRGD, no VBIAS, no external compensation) for broader input range - making TPS54110PWP optimal for tightly regulated 3.3-V/1.8-V point-of-load designs requiring sequencing and thermal robustness.
Availability
TPS54110PWP is available at Aetrix Electronics and suitable for point-of-load regulation, FPGA/DSP power delivery, and portable computing power management requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for TPS54110PWP 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 DC/DC conversion solutions.
The TPS54110PWP belongs to TI's SWIFT™ family of integrated synchronous buck converters, designed specifically for high-density, low-voltage point-of-load applications demanding precision regulation, fast transient response, and thermal resilience in compact form factors.
FAQ
What is the recommended minimum output capacitance for stable operation of the TPS54110PWP?
The TPS54110PWP requires a minimum 100-µF output capacitor (e.g., aluminum polymer or low-ESR tantalum) to maintain stability and meet ripple specifications under full 1.5-A load. TI's reference design uses 100 µF in parallel with 2200 pF for high-frequency noise suppression. Ceramic capacitors alone are insufficient due to insufficient bulk capacitance; hybrid or polymer types are preferred for ESR and capacitance retention across temperature.
Does the TPS54110PWP support synchronization to an external clock signal?
Yes, the TPS54110PWP supports external synchronization via the SYNC pin over a 330 kHz to 700 kHz range. To synchronize, drive a clean CMOS-level clock into SYNC and connect an RT resistor that sets the free-running frequency to 80% of the external clock frequency. This avoids beat frequencies and ensures deterministic phase alignment in multi-rail systems using the TPS54110PWP.
How does the TPS54110PWP handle reverse current during light-load conditions?
The TPS54110PWP operates in forced continuous conduction mode (FCCM) and does not enter diode emulation or discontinuous conduction mode. It actively sinks current continuously during output voltage overshoot or transient recovery, enabling true bidirectional regulation. This behavior is confirmed in the datasheet's "Detailed Description" section and allows safe operation with capacitive loads or during dynamic load steps without output voltage reversal.
What is the maximum allowable voltage on the BOOT pin of the TPS54110PWP?
The absolute maximum voltage on the BOOT pin of the TPS54110PWP is 17 V, as specified in Section 7.1 of the datasheet. Exceeding this rating risks permanent damage to the high-side gate driver. In normal operation, BOOT voltage equals PH voltage plus the bootstrap capacitor voltage (typically ~5 V), so proper selection of the 0.022–0.1 µF low-ESR ceramic capacitor and attention to PH ringing are essential to stay within this limit.
Can the TPS54110PWP be used with an output voltage lower than 0.9 V?
No, the TPS54110PWP is not specified or guaranteed to operate below 0.9 V output. Its internal reference is trimmed to 0.891 V ±0.009 V, and the error amplifier is characterized for 0.9 V to 3.3 V adjustment range. Attempting sub-0.9 V operation may result in reduced accuracy, instability, or failure to regulate due to comparator headroom limitations and reference tolerance boundaries - as confirmed in the "Features" and "Electrical Characteristics" sections of the TPS54110PWP datasheet.
TPS54110PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54110PWP FAQ
1.How can I place an order for TPS54110PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54110PWP 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 TPS54110PWP reliable?
The price and inventory of TPS54110PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54110PWP is usually 5 days.
3.What payment methods are accepted for TPS54110PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54110PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54110PWP?
TPS54110PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54110PWP 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 TPS54110PWP?
For technical support, including TPS54110PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54110PWP requirements.
6.How does Aetrix verify that TPS54110PWP is sourced from the original manufacturer or authorized distributors?
All TPS54110PWP 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 TPS54110PWP meets industry standards.
7.What is the process for return or replacement of TPS54110PWP?
All TPS54110PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54110PWP, 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 TPS54110PWP part is unused and in its original packaging.
Return procedure for TPS54110PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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