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Texas Instruments TPS54352PWPR
- Part No.:
- TPS54352PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54352PWPR.pdf
- Description:
- IC REG BUCK 1.2V 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
TPS54352PWPR from Texas Instruments is a 1.2-V fixed-output, 3-A continuous synchronous buck PWM converter with integrated 100-mΩ high-side MOSFET and external low-side MOSFET driver (LSG), operating from 4.5 V to 20 V input, featuring 250 kHz or 500 kHz fixed switching frequency, internal slow-start, and power-good (PWRGD) output - used in point-of-load regulation for FPGAs and microprocessors.
For engineers reviewing the TPS54352PWPR datasheet, TPS54352PWPR pinout, TPS54352PWPR application, or TPS54352PWPR equivalent, key selection considerations include its 16-pin TSSOP PowerPAD package, UVLO adjustability via external resistor divider, 180° synchronization capability, and thermal shutdown at 165°C with 7°C hysteresis.
Technical Context
The TPS54352PWPR implements a feed-forward modulator with constant 8 V/V gain across input voltage range, enabling stable transient response without loop compensation components. Its adaptive dead-time control prevents shoot-through by sequencing LSG and PH driver turn-on based on gate voltage thresholds below 1 V.
It uses an internally trimmed 0.891-V reference with true voltage amplifier error stage (60 dB open-loop gain, 2 MHz unity-gain bandwidth), and supports bidirectional SYNC operation - output mode when RT is grounded/floating, input mode when RT is resistor-set - enabling precise 180° out-of-phase interleaving for reduced input ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% over 100 mA–3 A load, enabling direct core supply for low-voltage DSPs and ASICs. |
| Input Voltage Range | 4.5 V to 20 V - supports wide industrial input rails including 5 V, 12 V, and 19 V adapter supplies. |
| Switching Frequency | 250 kHz (RT grounded) or 500 kHz (RT floating) - balances efficiency vs. size; adjustable up to 700 kHz with external RT resistor. |
| Continuous Output Current | 3 A - sustained delivery with integrated 100-mΩ high-side MOSFET and thermally enhanced PowerPAD package. |
| Thermal Shutdown | 165°C trip point with 7°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Power Good Threshold | 97% of nominal output (1.164 V) with rising-edge delay of 4 ms (at 250 kHz) - ensures reliable system power sequencing. |
| UVLO Start/Stop | 4.49 V start / 3.69 V stop (typical), adjustable via external resistor divider on UVLO pin - prevents erratic startup under brownout. |
Pinout & Package
TPS54352PWPR is housed in a thermally enhanced 16-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad tied to PGND/AGND - requires soldered thermal vias and copper pour for rated 2.36 W power dissipation at TA = 25°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input supply rail | Bypassed with 10-µF ceramic capacitor; feeds high-side MOSFET and bias regulator. |
| 3 UVLO | Undervoltage lockout control | External resistor divider overrides default 4.49 V start threshold; must not connect directly to VIN. |
| 4 PWRGD | Open-drain power-good indicator | Pulled low during fault conditions (UVLO, overcurrent, thermal shutdown, slow-start); requires external pullup. |
| 5 RT | Frequency setting | Ground = 250 kHz; floating = 500 kHz; resistor-to-AGND sets 250–700 kHz - also configures SYNC I/O direction. |
| 6 SYNC | Bidirectional sync interface | Outputs falling edge 180° out-of-phase with PH when RT grounded/floating; accepts falling-edge input when RT resistor-set. |
| 7 ENA | Enable/disable control | Logic-high enables; <0.5 V disables and resets slow-start; internal 5-µA pullup - no external pullup allowed. |
| 8 COMP | Error amplifier output | Internal node - no external connection permitted; drives PWM comparator and provides loop compensation access. |
| 9 VSENSE | Feedback input | Inverting input of error amplifier; compares output voltage (via resistor divider) to 0.891-V internal reference. |
| 10 AGND | Analog ground reference | Internally connected to sensitive analog circuitry; must be tied to PGND and PowerPAD. |
| 11 PGND | Power ground return | Carries high di/dt currents from LSG driver; connects to AGND and PowerPAD for low-impedance path. |
| 12 VBIAS | Internal 7.8-V bias supply | Powers analog circuits and LSG driver; requires 1.0-µF X7R/X5R ceramic bypass capacitor. |
| 13 LSG | Low-side gate driver output | 100-mA source/sink capable; directly drives n-channel MOSFET gate - no series resistor recommended. |
| 14, 15 PH | Phase node connection | Connects to LC filter inductor; carries high-frequency switching current; BOOT capacitor ties here. |
| 16 BOOT | Bootstrap capacitor node | 0.1-µF ceramic capacitor between BOOT and PH supplies gate drive for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 100-mΩ RDS(on) at 12 VIN, enabling >90% efficiency at 3 A with minimal external components. |
| 180° out-of-phase synchronization | SYNC pin automatically generates or accepts falling-edge signal - reduces input RMS current and capacitor stress in dual-rail systems. |
| Internally compensated architecture | Eliminates need for external compensation network - simplifies layout and accelerates design cycle for standard applications. |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying LSG/PH driver turn-on until opposing gate voltage falls below 1 V. |
| Programmable undervoltage lockout | UVLO pin accepts external resistor divider - allows precise start/stop thresholds independent of input rail tolerance. |
Applications
| Point-of-Load Regulation for FPGA Core | Industrial 12-V Input DC/DC Conversion |
|---|---|
Use Scenario: Powers 1.2-V core rail of Xilinx Spartan-6 FPGA with dynamic current demand up to 2.8 A during configuration and logic switching. IC Role / Device Role / Timing Role: Synchronous buck controller providing regulated 1.2-V output with fast transient response and PWRGD signaling for FPGA configuration sequencing. Use Value: Integrated 100-mΩ MOSFET and feed-forward modulation maintain <±1% output regulation during 2-A/µs load steps without external compensation. |
Use Scenario: Converts 12-V industrial bus to 1.2-V supply for embedded ARM Cortex-M7 MCU with real-time Ethernet interface. IC Role / Device Role / Timing Role: Primary DC/DC regulator with UVLO set to 10.5 V to prevent operation during brownout; SYNC synchronized to system clock for EMI reduction. Use Value: 500-kHz operation enables compact 2.2-µH inductor and 22-µF output capacitance while maintaining >88% efficiency at full load. |
| Computer Peripheral Power Supply | ASIC Test Equipment Bias Rail |
Use Scenario: Supplies 1.2-V I/O rail for USB 3.0 hub controller in desktop docking station with shared 12-V input. IC Role / Device Role / Timing Role: Secondary buck regulator operating 180° out-of-phase with main 3.3-V rail to minimize input capacitor ripple current. Use Value: Interleaved operation cuts input RMS current by ~30%, allowing use of single 47-µF X7R ceramic instead of two 22-µF units. |
Use Scenario: Provides precision 1.2-V bias for high-speed ADC/DAC evaluation board requiring ultra-low noise and tight line/load regulation. IC Role / Device Role / Timing Role: Low-noise buck converter with internal 0.891-V reference trimmed to ±0.5% and 60-dB open-loop gain for stable feedback. Use Value: Line regulation of ±0.02% across 4.5–20 V input ensures ADC reference stability unaffected by upstream supply variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54356PWPR | Fixed 3.3-V output; identical pinout, package, and feature set except output voltage and UVLO thresholds. | Used where 3.3-V I/O rail required instead of 1.2-V core rail - no PCB change needed if output voltage divider omitted. | Select TPS54356PWPR only when 3.3-V output is required; same thermal and layout constraints apply. |
| MP2332HGTL-Z | Monolithic 3-A buck converter (no external LSG); 1.2-V fixed output; 500 kHz default; smaller 8-pin SOIC-EP package. | Lacks SYNC, UVLO adjust, and LSG driver - suitable for space-constrained, cost-sensitive designs without interleaving or external FET needs. | Choose MP2332HGTL-Z for simplified BOM and layout; avoid if 180° sync, programmable UVLO, or discrete low-side FET optimization is required. |
Compared with TPS54352PWPR, TPS54356PWPR offers identical functionality at 3.3 V but cannot regulate 1.2 V, while MP2332HGTL-Z trades flexibility (SYNC, UVLO, LSG) for integration and footprint reduction - making it unsuitable for high-efficiency or multi-rail synchronized systems.
Availability
TPS54352PWPR is available at Aetrix Electronics and suitable for FPGA core supplies, industrial 12-V DC/DC conversion, and computer peripheral power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54352PWPR 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 TPS5435x family was designed specifically for high-performance point-of-load applications in DSPs, FPGAs, and microprocessors - emphasizing thermal robustness, transient response, and system-level synchronization.
FAQ
What is the maximum continuous output current supported by the TPS54352PWPR?
The TPS54352PWPR delivers 3 A continuous output current with proper PCB thermal design - verified under TJ ≤ 125°C, VIN = 12 V, VO = 1.2 V, and fs = 500 kHz. Its 100-mΩ high-side MOSFET and PowerPAD package enable this rating without external heatsinking when using ≥2 oz. copper and thermal vias.
Does the TPS54352PWPR require external compensation components?
No, the TPS54352PWPR is internally compensated - eliminating the need for external RC networks on the COMP pin. This simplifies layout and ensures stable operation across its specified input/output ranges and load conditions without tuning.
How is the switching frequency configured on the TPS54352PWPR?
The TPS54352PWPR supports three frequency modes: 250 kHz (RT grounded), 500 kHz (RT floating), or adjustable 250–700 kHz (RT connected to AGND via resistor). The RT resistor value determines frequency per RT(kΩ) = 46000 / fs(kHz) − 35.9.
Can the TPS54352PWPR synchronize to an external clock signal?
Yes - when an RT resistor sets the oscillator frequency, the SYNC pin becomes a falling-edge-triggered input. It accepts external clocks from 225 kHz to 770 kHz, with timing resistor tuned to 90–110% of the external frequency for reliable locking.
What thermal protection features does the TPS54352PWPR include?
The TPS54352PWPR incorporates thermal shutdown at 165°C with 7°C hysteresis, plus overcurrent protection with hiccup-mode recovery (4.5 ms off-time at 500 kHz). Both features disable the high-side MOSFET and reset the internal slow-start circuit to prevent damage during sustained overload.
TPS54352PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 250kHz, 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54352PWPR FAQ
1.How can I place an order for TPS54352PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54352PWPR 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 TPS54352PWPR reliable?
The price and inventory of TPS54352PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54352PWPR is usually 5 days.
3.What payment methods are accepted for TPS54352PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54352PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54352PWPR?
TPS54352PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54352PWPR 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 TPS54352PWPR?
For technical support, including TPS54352PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54352PWPR requirements.
6.How does Aetrix verify that TPS54352PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54352PWPR 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 TPS54352PWPR meets industry standards.
7.What is the process for return or replacement of TPS54352PWPR?
All TPS54352PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54352PWPR, 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 TPS54352PWPR part is unused and in its original packaging.
Return procedure for TPS54352PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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