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TPS54331GDR

IC REG BUCK ADJ 3A 8SOIC

Part Number: TPS54331GDR

Manufacturer: Texas Instruments

Category: Voltage Regulators - DC DC Switching Regulators

Package: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TPS54331GDR.pdf

Description: IC REG BUCK ADJ 3A 8SOIC

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

TPS54331GDR 3A, 28V Input, Step-Down DC/DC Converter with Eco-mode

A comprehensive technical overview of the TPS54331GDR, a 28-V, 3-A non-synchronous step-down converter from Texas Instruments featuring an integrated 80-mΩ high-side MOSFET, 570 kHz fixed switching frequency, pulse-skipping Eco-mode for light-load efficiency, and wide operating temperature range of –40°C to 150°C. Covers device function, core features, electrical specifications, 8-lead SOIC package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 8-SOIC 3.5V to 28V

Device Classification Non-Synchronous Step-Down DC/DC Converter

Part Number: TPS54331GDR

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +150°C

PRODUCT OVERVIEW

What Is the TPS54331GDR?

TPS54331GDR is a 28-V, 3-A non-synchronous step-down converter from Texas Instruments featuring an integrated low RDS(on) high-side MOSFET[reference:0]. The device belongs to the TPS54331 family and is designed to provide a highly efficient, compact power conversion solution for a wide range of applications.

The TPS54331GDR operates with an input voltage range of 3.5 V to 28 V and delivers an adjustable output voltage from 0.8 V to 25 V[reference:1][reference:2]. The device uses current-mode control with internal slope compensation, simplifying external compensation calculations while reducing component count and allowing the use of ceramic output capacitors[reference:3]. The fixed switching frequency is 570 kHz[reference:4].

To increase efficiency at light loads, a pulse-skipping Eco-mode feature is automatically activated[reference:5][reference:6]. The 1-µA shutdown supply current makes the device suitable for battery-powered applications[reference:7]. The TPS54331GDR is offered in an 8-lead SOIC (D) package[reference:8] and is rated for operation from –40°C to +150°C junction temperature[reference:9]. The device is RoHS3 compliant, REACH unaffected, and in active production[reference:10][reference:11].

High-Current Step-Down Converter 3-A continuous output current with integrated 80-mΩ high-side MOSFET[reference:12].

Wide Input & Adjustable Output 3.5-V to 28-V input, 0.8-V to 25-V adjustable output[reference:13].

Eco-mode for Light-Load Efficiency Pulse-skipping Eco-mode automatically activated for high efficiency at light loads[reference:14].

DEVICE HIGHLIGHTS

Key Features and Benefits of TPS54331GDR

Wide Input Voltage Range

3.5-V to 28-V input voltage range accommodates a broad spectrum of applications, from battery-powered systems to industrial power supplies[reference:15].

3-A Output Current Capability

Integrated 80-mΩ high-side MOSFET supports up to 3 A of continuous output current, delivering high power density in a compact package[reference:16][reference:17].

Eco-mode Light-Load Efficiency

Pulse-skipping Eco-mode automatically activates at light loads to reduce switching losses and improve efficiency, extending battery life in portable applications[reference:18][reference:19].

Fixed 570 kHz Switching Frequency

570 kHz fixed switching frequency enables the use of small external components and provides predictable EMI performance[reference:20].

Comprehensive Protection Features

Cycle-by-cycle current limiting, frequency foldback, thermal shutdown, overvoltage transient protection, and programmable UVLO ensure robust operation under fault conditions[reference:21][reference:22].

8-Lead SOIC Package

Available in an 8-lead SOIC package with a 4.90mm × 3.90mm footprint, ideal for space-constrained designs[reference:23].

REFERENCE DATA

Technical Specifications for TPS54331GDR

Part Number	TPS54331GDR	Manufacturer	Texas Instruments
Device Type	Non-Synchronous Step-Down DC/DC Converter	Topology	Buck (Step-Down)[reference:24]
Number of Outputs	1[reference:25]	Output Type	Adjustable[reference:26]
Input Voltage Range	3.5 V to 28 V[reference:27]	Output Voltage Range	0.8 V to 25 V[reference:28]
Output Current (Max)	3 A[reference:29]	Switching Frequency	570 kHz[reference:30]
High-Side MOSFET RDS(on)	80 mΩ (Typical)[reference:31]	Synchronous Rectifier	No[reference:32]
Quiescent Current (Shutdown)	1 µA (Typical)[reference:33]	Quiescent Current (Operating)	190 µA[reference:34]
Voltage Reference Accuracy	±2% Initial, ±3.5% Over Temperature[reference:35]	Package / Case	8-SOIC (0.154", 3.90mm Width)[reference:36]
Supplier Device Package	8-SOIC[reference:37]	Package Body Size	4.90mm × 3.90mm
Mounting Type	Surface Mount[reference:38]	Operating Temperature (Junction)	-40°C to +150°C[reference:39]
Moisture Sensitivity Level	Level-1-260C-UNLIM[reference:40]	RoHS	ROHS3 Compliant[reference:41]
REACH Status	REACH Unaffected[reference:42]	Lead Finish / Ball Material	CU NIPDAU[reference:43]
Packaging	Tape & Reel (2,500 per Reel)[reference:44]	Product Status	Active[reference:45]
Device Marking	54331[reference:46]	ECCN	EAR99[reference:47]

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for TPS54331GDR

Power Supply & Key Features

The TPS54331GDR requires careful power supply design for optimal performance:

Input Voltage: 3.5 V to 28 V operating range; bypass VIN to ground with a low-ESR ceramic bypass capacitor[reference:48][reference:49]
Output Voltage Programming: A resistive voltage divider programs the hysteresis of the input undervoltage lockout[reference:50]
Soft-Start: Adjustable soft-start using the SS pin with an external capacitor limits inrush current[reference:51][reference:52]
Enable and UVLO: The EN pin has an internal pullup current source for default operation; programmable UVLO threshold using external resistors[reference:53]
Bootstrap: Requires a 0.1-µF ceramic capacitor between BOOT and PH pins for high-side MOSFET gate drive[reference:54]

PCB and Power-Supply Guidance

Converter performance depends on layout and component selection:

Current-Mode Control: Internal slope compensation simplifies external compensation calculations and reduces component count[reference:55]
Output Capacitor: Allows the use of ceramic output capacitors[reference:56]
Thermal Management: The GND pin uses a fused lead frame to act as a conductive path for heat dissipation from the die[reference:57]
Ground Plane: The GND pin should be tied to the PCB ground plane at the pin of the device[reference:58]
External Compensation: Connect frequency compensation components to the COMP pin[reference:59]
Eco-mode: Pulse-skipping Eco-mode automatically activates to improve efficiency at light loads[reference:60]
Verify the recommended PCB footprint from the official datasheet prior to production

8-LEAD SOIC (4.90mm × 3.90mm)

Pin Configuration Reference for TPS54331GDR

54331

SOIC TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The SOIC package has 8 pins with a 4.90mm × 3.90mm body size. Device marking for the TPS54331GDR is "54331"[reference:61].

1 BOOT Bootstrap Capacitor - Connect a 0.1-µF ceramic capacitor between BOOT and PH to provide gate-drive voltage for the high-side MOSFET[reference:62]

2 VIN Input Supply Voltage - 3.5 V to 28 V; bypass to GND with a low-ESR ceramic capacitor[reference:63]

3 EN Enable Pin - Internal pullup current source; disable when pulled low; programmable UVLO with external resistors[reference:64]

4 SS Soft-Start - External capacitor sets output rise time and limits inrush current[reference:65][reference:66]

5 VSENSE Error Amplifier Inverting Input - Inverting node of the transconductance error amplifier; connects to output voltage feedback divider[reference:67]

6 COMP Error Amplifier Output - Output of the error amplifier and input to the PWM comparator; connect frequency compensation components here[reference:68]

7 GND Ground - Fused lead frame acts as conductive path for heat dissipation; tie to PCB ground plane[reference:69]

8 PH Phase Node - Source of the internal high-side power MOSFET; connect to the external inductor and bootstrap capacitor[reference:70]

APPLICATION AREAS

Typical Applications for TPS54331GDR

Point-of-Load Regulation

Provides efficient step-down conversion for local power supplies in distributed power architectures[reference:71].

Battery-Powered Equipment

1-µA shutdown quiescent current and Eco-mode light-load efficiency make this device suitable for portable and battery-powered applications[reference:72].

Industrial Power Supplies

Wide 3.5-V to 28-V input range and 3-A output current capability suit industrial automation and control systems.

Consumer Electronics

Provides efficient power conversion for set-top boxes, DVD players, and other consumer devices[reference:73].

FPGA and DSP Power

Supplies core and I/O voltages for FPGAs, DSPs, and other digital processors with 3-A output capability.

Automotive Infotainment

Wide input voltage range and robust protection features support automotive infotainment and telematics systems.

REPLACEMENT GUIDANCE

Selecting an Alternative for TPS54331GDR

A replacement for the TPS54331GDR should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Texas Instruments datasheet and product pages.

Non-synchronous step-down converter with 3-A output

Input voltage range: 3.5 V to 28 V

Output voltage range: 0.8 V to 25 V

Switching frequency: 570 kHz

Eco-mode pulse-skipping light-load efficiency

Package: 8-SOIC (D)

Temperature range: –40°C to 150°C

Protection: Overcurrent, thermal shutdown, UVLO

Packaging alternatives (same package, different carrier):

Part Number	Package	Carrier	SPQ	Temperature Range
TPS54331GDR	8-SOIC (D)	Tape & Reel	2,500[reference:74]	-40°C to 150°C
TPS54331DR	8-SOIC (D)	Tape & Reel	2,500	-40°C to 150°C

The TPS54331GDR is the standard tape-and-reel packaging variant in 8-SOIC package (2,500 units per reel). The "G" in the part number indicates gold bond wires, while the non-"G" version (TPS54331DR) uses copper bond wires[reference:75]. Both versions share identical electrical specifications and package type. For automotive-grade (AEC-Q100) applications, consider TPS54331QDRQ1[reference:76][reference:77]. Select based on bond wire preference and qualification requirements.

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MANUFACTURER INFORMATION

Texas Instruments

The TPS54331 (TPS54331GDR) belongs to the TPS54331 family of non-synchronous step-down DC/DC converters from Texas Instruments. The device is a 28-V, 3-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET[reference:78]. The TPS54331 family offers fixed 570 kHz switching frequency, pulse-skipping Eco-mode for light-load efficiency, and comprehensive protection features including cycle-by-cycle current limiting, frequency foldback, and thermal shutdown[reference:79]. The TPS54331 is available in 8-SOIC packages and is widely used in point-of-load regulation, battery-powered equipment, industrial power supplies, and consumer electronics applications[reference:80].

SUPPLIED BY

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Haishengye Electronics provides electronic component stock supply, BOM sourcing, quotation support, and quality inspection services for TPS54331GDR and related devices.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: TPS54331GDR

Manufacturer: Texas Instruments

Package: 8-SOIC (0.154", 3.90mm Width)

Series: Eco-Mode™

Package/Case: 8-SOIC (0.154", 3.90mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Function: Step-Down

Output Configuration: Positive

Topology: Buck

Output Type: Adjustable

Number of Outputs: 1

Voltage - Input (Min): 3.5V

Voltage - Input (Max): 28V

Voltage - Output (Min/Fixed): 0.8V

Voltage - Output (Max): 25V

Current - Output: 3A

Frequency - Switching: 570kHz

Synchronous Rectifier: No

Operating Temperature: -40°C ~ 150°C (TJ)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 8-SOIC

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TPS54331GDR Procurement and Technical Support

TPS54331GDR is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number: TPS54331GDR

Manufacturer: Texas Instruments

Package: 8-SOIC (0.154", 3.90mm Width)

Category: Voltage Regulators - DC DC Switching Regulators

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