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TPS54315MPWPREP

IC REG BUCK 2.5V 3A 20HTSSOP

Part Number: TPS54315MPWPREP

Manufacturer: Texas Instruments

Category: Voltage Regulators - DC DC Switching Regulators

Package: 20-PowerTSSOP (0.173", 4.40mm Width)

Datasheet:: TPS54315MPWPREP.pdf

Description: IC REG BUCK 2.5V 3A 20HTSSOP

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

TPS54315MPWPREP Enhanced Product 3-V to 6-V Input, 3-A Output Synchronous-Buck PWM Switcher

A comprehensive technical overview of the TPS54315MPWPREP, an Enhanced Product (EP) synchronous-buck PWM switcher from Texas Instruments featuring integrated FETs for 3-A output. Covers device function, core features, electrical specifications, 20-lead HTSSOP PowerPAD package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 20-Lead HTSSOP (PWP) 3V to 6V Input

Device Classification 3-A Synchronous-Buck PWM Switcher with Integrated FETs

Part Number: TPS54315MPWPREP

Mounting Type: Surface Mount

Operating Temperature Range: -55°C to +125°C

PRODUCT OVERVIEW

What Is the TPS54315MPWPREP?

TPS54315MPWPREP is an Enhanced Product (EP) synchronous-buck PWM switcher from Texas Instruments with integrated FETs, capable of sourcing or sinking 3-A of continuous output current. The device belongs to the SWIFT™ family of DC/DC regulators and operates from a 3-V to 6-V input voltage range.[reference:0][reference:1]

The TPS54315MPWPREP is a fixed-output version that provides a regulated 2.5-V output with 1% initial accuracy. The device integrates all required active components, including 60-mΩ MOSFET switches, a true high-performance voltage error amplifier, an undervoltage-lockout circuit, an internally and externally settable slow-start circuit, and a power-good output.[reference:2][reference:3]

As an Enhanced Product (EP), the device supports defense, aerospace, and high-reliability applications with a controlled baseline, one assembly/test/fabrication site, extended product life cycle, enhanced product-change notification, and full product traceability.[reference:4] The TPS54315MPWPREP is rated for an extended temperature range of –55°C to +125°C and is available in a thermally enhanced 20-lead HTSSOP PowerPAD™ package.[reference:5][reference:6]

3-A Output with Integrated FETs 60-mΩ MOSFET switches for high efficiency at 3-A continuous output source or sink current.

Enhanced Product (EP) Supports defense, aerospace, and high-reliability applications with controlled baseline and full traceability.

Extended Temperature Range Guaranteed operation from –55°C to +125°C for harsh environments.

DEVICE HIGHLIGHTS

Key Features and Benefits of TPS54315MPWPREP

Integrated 60-mΩ MOSFET Switches

60-mΩ MOSFET switches provide high efficiency at 3-A continuous output source or sink current, reducing external component count and board area.[reference:7]

Fixed 2.5-V Output with 1% Accuracy

Fixed 2.5-V output voltage with 1% initial accuracy, ideal for powering FPGAs, DSPs, ASICs, and microprocessors.[reference:8][reference:9]

Flexible PWM Frequency Options

Wide PWM frequency options: fixed 350 kHz, 550 kHz, or adjustable 280 kHz to 700 kHz for optimization of efficiency or component size.[reference:10][reference:11]

Comprehensive Protection Features

Load protected by peak current limit and thermal shutdown with cycle-by-cycle current limiting.[reference:12]

Extended Temperature Range

Rated for –55°C to +125°C operating temperature range with controlled baseline and full product traceability.[reference:13][reference:14]

Thermally Enhanced HTSSOP Package

Available in a 20-lead HTSSOP PowerPAD™ (PWP) package with exposed thermal pad for efficient heat dissipation without bulky heat sinks.[reference:15]

REFERENCE DATA

Technical Specifications for TPS54315MPWPREP

Part Number	TPS54315MPWPREP	Manufacturer	Texas Instruments
Base Part Number	TPS54315-EP	Device Type	Synchronous-Buck PWM Switcher with Integrated FETs
Input Voltage (VIN)	3 V to 6 V	Output Voltage (Fixed)	2.5 V
Output Current	3 A	Output Accuracy	±1% Initial, ±3% Over Temperature
Integrated MOSFETs	60 mΩ	Switching Frequency	350 kHz / 550 kHz / 280–700 kHz
Quiescent Current (350 kHz)	6.2 mA Typ, 9.6 mA Max	Quiescent Current (550 kHz)	8.4 mA Typ, 12.8 mA Max
Shutdown Current	1 mA Typ, 1.4 mA Max	UVLO Start Threshold	2.95 V
UVLO Stop Threshold	2.8 V	UVLO Hysteresis	0.14 V
Maximum Duty Cycle	90%	Thermal Shutdown	150°C
Package	20-Lead HTSSOP (PWP)	Package Body Size	6.50 mm × 4.40 mm
Package Carrier Quantity	2,000 per Reel	MSL Rating	Level-2-260C-1 YEAR
Mounting Type	Surface Mount	Operating Temperature	-55°C to +125°C
Lead Finish	CU NIPDAU	RoHS	Yes (Green)

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 TPS54315MPWPREP

Configuration & Operation

The TPS54315MPWPREP offers flexible configuration options:

Fixed Output Voltage: 2.5-V fixed output with 1% initial accuracy, requiring no external feedback divider
Frequency Selection: Selectable fixed 350 kHz or 550 kHz via FSEL pin, or adjustable 280 kHz to 700 kHz via external resistor on RT pin[reference:16]
Slow-Start/Enable: SS/ENA pin provides enable control and adjustable slow-start with external capacitor[reference:17]
Power-Good Output: Open-drain power-good output for processor reset, fault signaling, or supply sequencing[reference:18]
UVLO: Internal undervoltage lockout with 2.95-V start and 2.8-V stop thresholds[reference:19]

PCB and Power-Supply Guidance

Synchronous-buck converter performance depends on layout, bypassing, and component selection:

Input Capacitor: Place a high-quality ceramic capacitor close to the VIN pin to minimize input voltage ripple
Output Capacitor: Use low-ESR ceramic capacitors for stable operation
PowerPAD™: The exposed thermal pad on the bottom of the HTSSOP package must be soldered to the PCB for proper thermal and electrical performance[reference:20]
Bootstrap Capacitor: Connect a capacitor between BOOT and PH pins for high-side gate drive
Frequency Setting: Use precision resistor for accurate adjustable frequency programming
Thermal Management: Recommended 3-inch × 3-inch 1-oz copper ground plane with 10 thermal vias (0.013-inch diameter) for optimal heat dissipation[reference:21]
Verify the recommended PCB footprint from the official datasheet before production

20-LEAD HTSSOP (PWP)

Pin Configuration Reference for TPS54315MPWPREP

TPS54315

HTSSOP (PWP) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The PWP package has 20 pins with exposed thermal pad (Pad) connected to ground.[reference:22]

1 AGND Analog Ground - Sensitive analog ground reference

2 VSENSE Output Voltage Sense - Connect to output voltage

3 NC No Connect - Not internally connected

4 PWRGD Power-Good - Open-drain output, asserts when output is within regulation

5 BOOT Bootstrap - Bootstrap capacitor connection for high-side FET gate drive

6 PH Phase - Switch node, connect to inductor

7 PH Phase - Switch node, connect to inductor

8 PH Phase - Switch node, connect to inductor

9 PH Phase - Switch node, connect to inductor

10 RT Frequency Set - External resistor to ground sets switching frequency (280–700 kHz)

11 FSEL Frequency Select - Selects fixed 350 kHz or 550 kHz switching frequency

12 SS/ENA Slow-Start / Enable - Enable input; capacitor to ground sets slow-start time

13 VBIAS Bias Voltage - Internal bias supply; bypass with capacitor to ground

14 VIN Input Supply Voltage - 3 V to 6 V

15 VIN Input Supply Voltage - 3 V to 6 V

16 VIN Input Supply Voltage - 3 V to 6 V

17 PGND Power Ground - Power ground for the internal MOSFET switches

18 PGND Power Ground - Power ground for the internal MOSFET switches

19 PGND Power Ground - Power ground for the internal MOSFET switches

20 PGND Power Ground - Power ground for the internal MOSFET switches

APPLICATION AREAS

Typical Applications for TPS54315MPWPREP

Point-of-Load Regulation

Point-of-Load regulation for high-performance DSPs, FPGAs, ASICs, and microprocessors.[reference:23]

Broadband & Networking Infrastructure

Broadband, networking, and optical communications infrastructure.[reference:24]

Automotive Telematics

Automotive telematics and infotainment systems.[reference:25]

Low-Voltage, High-Density Systems

Low-voltage, high-density systems with power distributed at 5 V or 3.3 V.[reference:26]

Defense & Aerospace Systems

Enhanced Product (EP) with controlled baseline, single assembly/test/fabrication site, and full traceability.[reference:27]

High-Reliability Applications

Extended temperature range (–55°C to 125°C) for demanding high-reliability applications.[reference:28]

REPLACEMENT GUIDANCE

Selecting an Alternative for TPS54315MPWPREP

A replacement for the TPS54315MPWPREP should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Input voltage range (3 V–6 V)

Output voltage (2.5 V fixed, 1% accuracy)

Output current capability (3 A)

Integrated 60-mΩ MOSFETs

Switching frequency (350 kHz, 550 kHz, or adjustable 280–700 kHz)

Package (20-lead HTSSOP with PowerPAD)

Temperature range (–55°C to +125°C)

Enhanced Product (EP) qualification

Family alternatives: TPS54311MPWPREP (0.9 V output), TPS54312MPWPREP (1.2 V output), TPS54313MPWPREP (1.5 V output), TPS54314MPWPREP (1.8 V output), TPS54315MPWPREP (2.5 V output), TPS54316MPWPREP (3.3 V output).[reference:29] For non-EP requirements with standard temperature range, consider the commercial TPS5431x series. Select based on output voltage, temperature range, and packaging needs.

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MANUFACTURER INFORMATION

Texas Instruments

The TPS54315-EP (TPS54315MPWPREP) belongs to the SWIFT™ family of synchronous-buck PWM switchers from Texas Instruments. The Enhanced Product (EP) version provides controlled baseline, one assembly/test/fabrication site, extended temperature performance of –55°C to 125°C, enhanced diminishing manufacturing sources (DMS) support, enhanced product-change notification, and qualification pedigree for defense, aerospace, and high-reliability applications.[reference:30]

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Haishengye Electronics

Haishengye Electronics provides electronic component stock supply, BOM sourcing, quotation support, and quality inspection services for TPS54315MPWPREP 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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TPS54315MPWPREP Technical Information

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Specifications

Product Attribute: Attribute Value

Part Number: TPS54315MPWPREP

Manufacturer: Texas Instruments

Package: 20-PowerTSSOP (0.173", 4.40mm Width)

Series: SWIFT™

Package/Case: 20-PowerTSSOP (0.173", 4.40mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Function: Step-Down

Output Configuration: Positive

Topology: Buck

Output Type: Fixed

Number of Outputs: 1

Voltage - Input (Min): 3V

Voltage - Input (Max): 6V

Voltage - Output (Min/Fixed): 2.5V

Voltage - Output (Max): -

Current - Output: 3A

Frequency - Switching: 350kHz, 550kHz

Synchronous Rectifier: Yes

Operating Temperature: -55°C ~ 125°C (TJ)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 20-HTSSOP

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TPS54315MPWPREP Procurement and Technical Support

TPS54315MPWPREP 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: TPS54315MPWPREP

Manufacturer: Texas Instruments

Package: 20-PowerTSSOP (0.173", 4.40mm Width)

Category: Voltage Regulators - DC DC Switching Regulators

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