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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Texas Instruments TPS54353PWPRG4

Name: TPS54353PWPRG4
Brand: Texas Instruments
SKU: TPS54353PWPRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS54353PWPRG4

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-PowerTSSOP (0.173", 4.40mm Width)

Datasheet:: TPS54353PWPRG4.pdf

Description:: IC REG BUCK 1.5V 3A 16HTSSOP

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Product details

Overview

TPS54353PWPRG4 from Texas Instruments is a synchronous buck PWM converter with integrated 100 mΩ high-side MOSFET and external low-side gate driver (LSG), delivering up to 3-A continuous output current at fixed 1.5 V output. It operates from 4.5 V to 20 V input, supports 250 kHz or 500 kHz fixed switching frequency, and features internal slow-start, power-good (PWRGD) monitoring, and 180° out-of-phase synchronization capability for multi-rail systems in point-of-load applications.

For engineers reviewing the TPS54353PWPRG4 datasheet, TPS54353PWPRG4 pinout, TPS54353PWPRG4 application, or TPS54353PWPRG4 equivalent, this device is selected for high-efficiency, thermally robust DC/DC conversion where precise 1.5 V regulation, input ripple reduction via phase interleaving, and fault-aware power sequencing are required in space-constrained industrial and computing power supplies.

Technical Context

The TPS54353PWPRG4 implements feed-forward PWM control with an 8 V/V modulator gain, enabling stable transient response across wide input voltage ranges. Its adaptive dead-time logic prevents shoot-through by sequencing LSG and PH drivers based on gate voltage thresholds (<1 V), while the error amplifier delivers 1.5 mA drive capability and 2 MHz unity-gain bandwidth for loop stability.

It integrates undervoltage lockout (UVLO) with 4.49 V start / 3.69 V stop thresholds, thermal shutdown at 165°C with 7°C hysteresis, and peak-current limiting (4.5 A typical) with hiccup-mode recovery. The SYNC pin functions as bidirectional I/O-outputting a falling-edge signal 180° out of phase with PH when RT is floating, or accepting external sync when RT is resistor-programmed.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5 V ±1.5% over 100 mA–3 A load and −40°C to 125°C junction temperature.
Input Voltage Range	4.5 V to 20 V - supports 5 V, 12 V, and 19 V nominal rails without external regulators.
Switching Frequency	250 kHz (RT grounded) or 500 kHz (RT floating) - enables optimized efficiency vs. size trade-off; no external timing components required for fixed modes.
Continuous Output Current	3 A - sustained delivery enabled by 100 mΩ high-side MOSFET and PowerPAD-enhanced thermal dissipation (2.36 W at TA = 25°C).
Thermal Shutdown	165°C trip point with 7°C hysteresis - ensures safe shutdown and automatic restart after cooling, critical for unattended industrial operation.
Power Good Signal	PWRGD open-drain output asserts low if VSENSE falls below 97% of target, during UVLO, overcurrent, or thermal fault - provides reliable system-level power sequencing.
Enable Threshold	ENA disables switching below 0.5 V - supports clean digital enable/disable with TTL- or CMOS-compatible logic without pull-up resistors.

Pinout & Package

TPS54353PWPRG4 uses a 16-pin HTSSOP (PWP) package with exposed PowerPAD thermal pad soldered to PGND/AGND plane for enhanced heat dissipation. Package dimensions: 5.0 mm × 6.4 mm × 1.2 mm, pitch 0.65 mm.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 VIN	Input supply rail	Accepts 4.5–20 V; requires local 10-µF ceramic bypass to minimize high-frequency input ripple and EMI.
3 UVLO	Undervoltage lockout adjust	External resistor divider overrides default 4.49 V start threshold; internal 320 kΩ/125 kΩ divider sets base UVLO behavior.
4 PWRGD	Power-good status indicator	Open-drain output pulled low during faults (VSENSE < 97%, overcurrent, thermal, UVLO); includes rising-edge delay (2–4 ms) to suppress false triggers.
5 RT	Frequency selection	Ground = 250 kHz; floating = 500 kHz; resistor-to-AGND enables 250–700 kHz tuning - also configures SYNC pin direction.
6 SYNC	Bidirectional synchronization I/O	Outputs falling edge 180° out of phase with PH when RT floating; accepts falling-edge external clock when RT resistor-programmed.
7 ENA	Enable control	Logic-high (≥1.2 V) enables operation; <0.5 V disables switching and resets internal slow-start - internal 5 µA pullup eliminates need for external bias.
8 COMP	Error amplifier output	Internal node - must remain unconnected; compensation network placed between VSENSE and COMP per design requirements.
9 VSENSE	Feedback input	Inverting input of error amplifier; monitors output via resistor divider; 1 µA bias current enables high-impedance sensing.
10 AGND	Analog ground reference	Low-noise ground for sensitive analog circuitry; must be connected to PowerPAD and PGND with short, low-inductance traces.
11 PGND	Power ground return	Carries high di/dt currents from LSG driver; ties to PowerPAD and AGND to minimize ground bounce and improve EMI performance.
12 VBIAS	Internal bias regulator output	Provides stable ~7.8 V (at VIN ≥12 V) for gate drivers and analog circuits; requires 1.0 µF X7R/X5R ceramic bypass capacitor.
13 LSG	Low-side gate driver output	100 mA capable driver for external n-channel MOSFET; enables synchronous rectification to boost light-load efficiency.
14, 15 PH	Phase node connection	High-current switching node connecting to LC filter inductor; voltage swings from near-GND to VIN during operation.
16 BOOT	Bootstrap capacitor connection	Connects 0.1 µF ceramic cap to PH to generate gate drive voltage for high-side MOSFET; critical for proper high-side turn-on.

Key Features

Feature	Design Value
Integrated 100 mΩ high-side MOSFET	Enables >90% efficiency at 3 A with minimal external components; eliminates discrete high-side switch layout complexity and losses.
180° out-of-phase synchronization	Reduces RMS input ripple current by √2 and cuts required input capacitance in dual-rail configurations - directly improves EMI and board area.
Internally compensated architecture	Eliminates need for external Type-II/III compensation networks; simplifies design while maintaining stability across full load and line range.
Adaptive dead-time control	Prevents shoot-through by dynamically delaying LSG/PH transitions until gate voltages fall below 1 V - enhances reliability under varying load conditions.
Programmable undervoltage lockout	Allows custom start/stop thresholds using external resistors - supports brown-in/brown-out behavior tailored to system-level power sequencing requirements.

Applications

Point-of-Load Regulation for FPGAs	Industrial LCD Power Supply
Use Scenario: Powers core voltage (1.5 V) of mid-range FPGA with dynamic current demand up to 3 A during configuration and logic operation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise 1.5 V rail with fast transient response and PWRGD signaling for FPGA configuration handshake. Use Value: Delivers consistent 1.5 V within ±1.5% tolerance across temperature and load, ensuring FPGA logic integrity and eliminating need for post-regulation LDOs.	Use Scenario: Supplies 1.5 V bias voltage to timing controllers and interface ICs in industrial-grade LCD panels operating in extended temperature environments. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter with thermal shutdown and UVLO protection, ensuring safe startup and fault-safe shutdown in sealed enclosures. Use Value: Maintains stable 1.5 V output despite 4.5–20 V input variation from industrial 12 V or 24 V bus, reducing BOM count versus adjustable solutions.
Computer Peripheral Power	Embedded DSP Core Supply
Use Scenario: Generates 1.5 V for USB 3.x hub controllers and PCIe endpoint logic in compact peripheral devices with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency buck converter leveraging PowerPAD thermal enhancement and 500 kHz switching to minimize inductor size and board footprint. Use Value: Achieves >88% efficiency at 2 A/1.5 V with 12 V input, lowering thermal load in fanless enclosures and extending product lifetime.	Use Scenario: Provides 1.5 V core supply to TI C6000-series DSPs requiring precise voltage accuracy and fast load-step response during real-time signal processing. IC Role / Device Role / Timing Role: Synchronous buck regulator with feed-forward modulation and 2 MHz error amplifier bandwidth, minimizing output deviation during 1-A/µs transients. Use Value: Limits output voltage deviation to <±30 mV during 1-A load steps, preventing DSP core stalls and ensuring deterministic execution timing.

Point-of-Load Regulation for FPGAs

Industrial LCD Power Supply

Use Scenario: Powers core voltage (1.5 V) of mid-range FPGA with dynamic current demand up to 3 A during configuration and logic operation.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise 1.5 V rail with fast transient response and PWRGD signaling for FPGA configuration handshake.

Use Value: Delivers consistent 1.5 V within ±1.5% tolerance across temperature and load, ensuring FPGA logic integrity and eliminating need for post-regulation LDOs.

Use Scenario: Supplies 1.5 V bias voltage to timing controllers and interface ICs in industrial-grade LCD panels operating in extended temperature environments.

IC Role / Device Role / Timing Role: Fixed-output DC/DC converter with thermal shutdown and UVLO protection, ensuring safe startup and fault-safe shutdown in sealed enclosures.

Use Value: Maintains stable 1.5 V output despite 4.5–20 V input variation from industrial 12 V or 24 V bus, reducing BOM count versus adjustable solutions.

Computer Peripheral Power

Embedded DSP Core Supply

Use Scenario: Generates 1.5 V for USB 3.x hub controllers and PCIe endpoint logic in compact peripheral devices with strict thermal limits.

IC Role / Device Role / Timing Role: High-efficiency buck converter leveraging PowerPAD thermal enhancement and 500 kHz switching to minimize inductor size and board footprint.

Use Value: Achieves >88% efficiency at 2 A/1.5 V with 12 V input, lowering thermal load in fanless enclosures and extending product lifetime.

Use Scenario: Provides 1.5 V core supply to TI C6000-series DSPs requiring precise voltage accuracy and fast load-step response during real-time signal processing.

IC Role / Device Role / Timing Role: Synchronous buck regulator with feed-forward modulation and 2 MHz error amplifier bandwidth, minimizing output deviation during 1-A/µs transients.

Use Value: Limits output voltage deviation to <±30 mV during 1-A load steps, preventing DSP core stalls and ensuring deterministic execution timing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS54353PWPR	Same silicon, identical electrical specs; G4 suffix denotes RoHS-compliant green packaging and tape-and-reel packaging per TI standard.	No functional difference; both support same PCB layout, thermal design, and schematic implementation.	Select TPS54353PWPRG4 for compliance with lead-free and halogen-free requirements in new designs or manufacturing programs.
TPS54354PWPRG4	Identical architecture and package, but fixed 1.8 V output; shares same 4.5–20 V input range, 3-A capability, and 250/500 kHz frequency options.	Not interchangeable without redesigning feedback network; intended for 1.8 V logic rails (e.g., DDR memory interfaces, certain microcontrollers).	Choose TPS54354PWPRG4 only when 1.8 V output is required; not a drop-in replacement for 1.5 V use cases.

Compared with TPS54353PWPR and TPS54354PWPRG4, the TPS54353PWPRG4 uniquely delivers factory-trimmed 1.5 V output with guaranteed ±1.5% accuracy across full load and temperature, making it the optimal choice for applications demanding exact 1.5 V regulation without external feedback adjustment.

Availability

TPS54353PWPRG4 is available at Aetrix Electronics and suitable for industrial LCD power supplies, FPGA point-of-load regulation, computer peripheral power, embedded DSP core supplies, and industrial computing systems requiring stable component supply with long-term manufacturability.

Supply support for TPS54353PWPRG4 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 TPS5435x family was designed specifically for medium-current, space-constrained point-of-load applications in industrial, computing, and display systems where efficiency, thermal performance, and integration reduce design cycle time.

FAQ

What is the output voltage tolerance of the TPS54353PWPRG4 over temperature and load?

The TPS54353PWPRG4 delivers a fixed 1.5 V output with ±1.5% tolerance across the full operating junction temperature range (−40°C to 125°C) and output load current range (100 mA to 3 A). This specification is verified per TI's SLVS519A datasheet Table 4, ensuring predictable regulation without external trimming or calibration in production systems.

Can the TPS54353PWPRG4 operate without an external low-side MOSFET?

Yes, the TPS54353PWPRG4 can operate with only an external Schottky diode connected from PH to PGND, using its integrated pulldown MOSFET for light-load CCM operation. However, replacing the diode with an external n-channel MOSFET driven by the LSG pin improves efficiency - especially above 1 A - by reducing conduction losses.

How does the SYNC pin function in TPS54353PWPRG4 when RT is left floating?

When the RT pin is floating, the TPS54353PWPRG4 operates at 500 kHz and configures the SYNC pin as an output that generates a falling-edge signal approximately 180° out of phase with the rising edge of the PH node. This enables seamless interleaving with a second TPS5435x device to reduce input ripple and improve thermal distribution.

What thermal performance can be expected from the TPS54353PWPRG4 in a standard PCB layout?

With recommended layout - including soldered PowerPAD, 2 oz. copper planes, thermal vias, and proper grounding - the TPS54353PWPRG4 achieves a junction-to-ambient thermal impedance of 42.1°C/W. At 25°C ambient and 3 A load, this yields a typical junction temperature rise of ~100°C, well within the 125°C max operating limit.

Is the TPS54353PWPRG4 compatible with TI's SWIFT Designer software tool?

Yes, the TPS54353PWPRG4 is fully supported in TI's SWIFT Designer software. The tool provides validated component selection, loop compensation design, thermal simulation, and bill-of-materials generation specific to this device - accelerating development of high-performance, production-ready power supplies.

TPS54353PWPRG4 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:: Discontinued at Digi-Key

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):: 1.5V

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

TPS54353PWPRG4 FAQ

1.How can I place an order for TPS54353PWPRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS54353PWPRG4 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 TPS54353PWPRG4 reliable?

The price and inventory of TPS54353PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54353PWPRG4 is usually 5 days.

3.What payment methods are accepted for TPS54353PWPRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54353PWPRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS54353PWPRG4?

TPS54353PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS54353PWPRG4 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 TPS54353PWPRG4?

For technical support, including TPS54353PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54353PWPRG4 requirements.

6.How does Aetrix verify that TPS54353PWPRG4 is sourced from the original manufacturer or authorized distributors?

All TPS54353PWPRG4 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 TPS54353PWPRG4 meets industry standards.

7.What is the process for return or replacement of TPS54353PWPRG4?

All TPS54353PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54353PWPRG4, 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 TPS54353PWPRG4 part is unused and in its original packaging.

Return procedure for TPS54353PWPRG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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