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

Texas Instruments TPS542A50RJMR

Name: TPS542A50RJMR
Brand: Texas Instruments
SKU: TPS542A50RJMR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS542A50RJMR

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 33-PowerVFQFN

Datasheet:: TPS542A50RJMR.pdf

Description:: IC REG BUCK ADJ 15A 33VQFN

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Product details

Overview

TPS542A50RJMR from Texas Instruments is a 4-V to 18-V input, 15-A synchronous buck converter with differential remote sense and I²C interface. It integrates 9.1-mΩ high-side and 2.6-mΩ low-side MOSFETs, supports 0.5-V to 5.5-V output voltage range, operates at selectable switching frequencies from 400 kHz to 2.2 MHz, and delivers monotonic start-up into pre-biased loads - used in FPGA core rail regulation for enterprise SSDs.

For engineers reviewing the TPS542A50RJMR datasheet, TPS542A50RJMR pinout, TPS542A50RJMR application, or TPS542A50RJMR equivalent, key selection criteria include remote-sense accuracy (±0.25 mV offset), I²C-adjustable VOUT (–20% to +10% in 0.028% steps), seven-frequency selection, FCCM/ PFM mode control, and thermal shutdown at 155°C.

Technical Context

The TPS542A50RJMR implements fixed-frequency voltage-mode control with digitally enhanced PWM modulation, enabling narrow on-times (<12 ns) and low jitter for high-step-down applications. Its internal compensation network eliminates external Type-II/III compensation components across wide inductor/capacitor ranges.

Differential remote sensing uses dedicated RSP/RSN inputs with 7-MHz unity-gain bandwidth, 83-dB open-loop gain, and 2.5-V/µs slew rate to reject PCB trace IR drop. I²C configuration supports six overcurrent limits, four soft-start rates, two addresses, and controlled VOUT slew during dynamic adjustment.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4 V to 18 V - supports 5 V, 9 V, 12 V, and 14 V intermediate bus rails without external regulators.
Output Current	15 A continuous - enabled by integrated 9.1-mΩ/2.6-mΩ MOSFETs with 17.7 °C/W junction-to-board thermal resistance.
Output Voltage Range	0.5 V to 5.5 V - set via 1.2-V SREF and 5:1 internal feedback divider; VSET = 0.1 V–1.1 V corresponds to 0.5 V–5.5 V.
Switching Frequency	400 kHz to 2.2 MHz - selected via FSEL resistor or synchronized externally; minimum on/off times are 12 ns / 85 ns.
I²C Interface	10–1000 kHz operation - enables real-time VOUT adjustment (–20% to +10%), overcurrent limit, soft-start rate, and address selection.
Remote Sense Accuracy	±0.25 mV input offset - ensures <±15 mV total output voltage error at 1 VOUT over –40°C to +150°C junction temperature.
Shutdown Quiescent Current	17 µA typical - minimizes system standby power loss in always-on industrial and networking equipment.

Pinout & Package

TPS542A50RJMR is housed in a 4-mm × 4.5-mm, 33-pin VQFN package (RJM) with exposed thermal pad. The package supports high-current routing via multiple PGND (pins 13–16, 29–33), PVIN (pins 18–20), and SW (pins 26–28) terminals.

Pin/Terminal	Circuit Role	Design Meaning
AVIN	Analog supply input	Provides clean bias for internal analog circuitry; must be tied to PVIN with RC filter (10 Ω + 100 nF–1 µF).
BOOT	High-side gate drive bootstrap	Connects to SW through external bootstrap capacitor; supplies gate voltage > VSW for high-side MOSFET turn-on.
COMP	Compensation network node	Resistor-to-ground sets I²C address and internal compensation; grounding selects default settings and reduces BOM count.
EN	Enable and UVLO control	Float to enable; driven externally to adjust input UVLO threshold (1.2 V typ.) using resistor divider from PVIN.
FSEL	Frequency select	Resistor-to-ground selects one of seven switching frequencies (400 kHz–2.2 MHz); grounded for default 1 MHz.
ILIM	Overcurrent limit setting	Resistor-to-ground configures six LS-FET current limits (4.66 A–22 A); grounded for default 17.6 A.
PGD	Power good indicator	Open-drain output asserts high after soft-start completes and VOUT is within ±10% of target; 500-µs delay from SS finish.
RSP / RSN	Differential remote sense inputs	RSP connects to load VOUT+, RSN to load ground; internal 5:1 divider enables precise regulation independent of PCB IR drop.
SCL / SDA	I²C serial interface	Supports standard-mode (100 kHz) and fast-mode (400 kHz) communication; 10-pF pin capacitance, 1.35-V VIH threshold.
SS/PFM	Soft-start and light-load mode	Resistor-to-ground selects one of four soft-start slew rates and enables/disables PFM mode; grounded for default PFM enable.
VSET	Output voltage reference input	Midpoint of resistive divider from SREF (1.2 V) to AGND; sets VOUT = 5 × VSET (e.g., 0.2 V → 1.0 V).
VREG	Internal LDO output	Supplies 4.3–4.96 V (30 mA max) to gate drivers; bypassed with 4.7-µF ceramic capacitor to PGND for stability.

Key Features

Feature	Design Value
Integrated Power Stage	9.1-mΩ HS + 2.6-mΩ LS MOSFETs eliminate external discrete FETs and reduce layout complexity for 15-A point-of-load designs.
Differential Remote Sense	7-MHz bandwidth, 2.5-V/µs slew rate, and ±0.25-mV offset ensure <±15 mV output regulation error under load step and thermal drift.
I²C Programmability	Real-time VOUT adjustment (–20% to +10% in 0.028% steps), six OC limits, four SS rates, and dual I²C addresses simplify system-level tuning.
Monotonic Pre-biased Start-up	Guarantees controlled ramp-up even when output capacitor is pre-charged - critical for hot-swap and multi-rail sequencing in ASIC/FPGA systems.
Thermal Robustness	Rated for –40°C to +150°C junction operation with 155°C thermal shutdown and 15°C hysteresis, supporting wireless infrastructure and industrial environments.

Applications

Enterprise SSD Power Rail	FPGA Core Voltage Regulation
Use Scenario: Regulating 0.85 V core supply for NVMe SSD controllers under dynamic 0–12 A load transients. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with differential remote sense correcting for PCB trace resistance between VRM and die. Use Value: Maintains ±10 mV output accuracy at 12 A despite 50 mΩ board trace resistance, enabled by RSP/RSN inputs and 83-dB remote amplifier gain.	Use Scenario: Delivering 1.0 V @ 15 A to Xilinx Versal ACAP core logic with strict monotonicity and sequencing requirements. IC Role / Device Role / Timing Role: High-current POL converter with I²C-configurable soft-start and pre-biased start-up for safe FPGA configuration. Use Value: Eliminates external compensation and sequencing ICs via integrated VSET-based voltage setting and EN-controlled startup timing.
Industrial Networking Switch	Machine Vision Camera Module
Use Scenario: Generating 3.3 V @ 8 A for Ethernet PHY and packet processor in fanless 48-V PoE switch operating at 75°C ambient. IC Role / Device Role / Timing Role: Thermally optimized buck converter with 54.9 °C/W junction-to-ambient rating and 150°C max TJ rating. Use Value: Sustains full 8-A load without derating at 75°C ambient due to low RθJA (22.3 °C/W on EVM) and efficient 2.6-mΩ LS-FET conduction.	Use Scenario: Providing 1.2 V @ 6 A to CMOS image sensor with low-noise, low-ripple performance in compact camera housing. IC Role / Device Role / Timing Role: Compact 4 mm × 4.5 mm VQFN buck regulator with FCCM/ PFM mode selection for optimal light-load efficiency. Use Value: Achieves >92% efficiency at 100 mA (PFM) and >94% at 6 A (FCCM), reducing thermal load in sealed optical enclosures.

Enterprise SSD Power Rail

FPGA Core Voltage Regulation

Use Scenario: Regulating 0.85 V core supply for NVMe SSD controllers under dynamic 0–12 A load transients.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator with differential remote sense correcting for PCB trace resistance between VRM and die.

Use Value: Maintains ±10 mV output accuracy at 12 A despite 50 mΩ board trace resistance, enabled by RSP/RSN inputs and 83-dB remote amplifier gain.

Use Scenario: Delivering 1.0 V @ 15 A to Xilinx Versal ACAP core logic with strict monotonicity and sequencing requirements.

IC Role / Device Role / Timing Role: High-current POL converter with I²C-configurable soft-start and pre-biased start-up for safe FPGA configuration.

Use Value: Eliminates external compensation and sequencing ICs via integrated VSET-based voltage setting and EN-controlled startup timing.

Industrial Networking Switch

Machine Vision Camera Module

Use Scenario: Generating 3.3 V @ 8 A for Ethernet PHY and packet processor in fanless 48-V PoE switch operating at 75°C ambient.

IC Role / Device Role / Timing Role: Thermally optimized buck converter with 54.9 °C/W junction-to-ambient rating and 150°C max TJ rating.

Use Value: Sustains full 8-A load without derating at 75°C ambient due to low RθJA (22.3 °C/W on EVM) and efficient 2.6-mΩ LS-FET conduction.

Use Scenario: Providing 1.2 V @ 6 A to CMOS image sensor with low-noise, low-ripple performance in compact camera housing.

IC Role / Device Role / Timing Role: Compact 4 mm × 4.5 mm VQFN buck regulator with FCCM/ PFM mode selection for optimal light-load efficiency.

Use Value: Achieves >92% efficiency at 100 mA (PFM) and >94% at 6 A (FCCM), reducing thermal load in sealed optical enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS543A50RJMR	Higher 30-A output capability; identical pinout, package, and feature set except doubled current rating and adjusted ILIM scaling.	Required where sustained >15 A or higher peak transient currents exist (e.g., AI accelerator modules).	Select TPS543A50RJMR only if design requires >15 A continuous output; otherwise TPS542A50RJMR offers lower cost and smaller thermal footprint.
MP2960GQKT-Z	4-V to 18-V input, 12-A rated, I²C-programmable buck; lacks differential remote sense, uses single-point feedback and 1.5-mV VREF offset.	Suitable for cost-sensitive applications where ±25 mV output tolerance is acceptable and PCB layout allows direct feedback placement.	Choose MP2960GQKT-Z only when remote sensing is unnecessary and BOM cost reduction outweighs precision regulation needs.

Compared with TPS542A50RJMR, TPS543A50RJMR doubles current capacity without changing footprint or control architecture, while MP2960GQKT-Z trades remote-sense accuracy for lower unit cost and simpler layout - making TPS542A50RJMR optimal for precision 15-A POL where board space and thermal margin are constrained.

Availability

TPS542A50RJMR is available at Aetrix Electronics and suitable for enterprise SSD power rails, FPGA core voltage regulation, and industrial networking switches requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS542A50RJMR 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-efficiency DC/DC conversion.

The TPS542A50RJMR belongs to TI's D-CAP2™ family of high-current synchronous buck converters, designed specifically for demanding point-of-load applications in datacenter, telecom, and industrial systems requiring precision regulation, thermal resilience, and digital configurability.

FAQ

What is the maximum output current supported by the TPS542A50RJMR?

The TPS542A50RJMR supports up to 15 A of continuous output current. This rating is enabled by its integrated 9.1-mΩ high-side and 2.6-mΩ low-side MOSFETs, verified under recommended operating conditions (PVIN = 12 V, VOUT = 1 V, TJ ≤ 150°C) with proper PCB thermal design including 2-oz copper and thermal vias to inner layers. Derating applies above 85°C ambient.

How does the differential remote sense function work on the TPS542A50RJMR?

The TPS542A50RJMR uses dedicated RSP and RSN pins to measure output voltage directly at the load, rejecting voltage drop across PCB traces. An internal 5:1 resistor divider scales the sensed voltage, so VSET must equal 1/5 of the desired VOUT. The remote amplifier features 7-MHz bandwidth, 83-dB open-loop gain, and ±0.25-mV input offset to maintain tight regulation accuracy under dynamic load conditions.

Can the TPS542A50RJMR be configured without using the I²C interface?

Yes, the TPS542A50RJMR supports full pinstrap configuration: FSEL sets switching frequency, ILIM selects overcurrent limit, SS/PFM chooses soft-start rate and light-load mode, and COMP selects I²C address and compensation. Grounding these pins activates default values, eliminating the need for microcontroller interaction in fixed-function designs.

What is the purpose of the VSET pin on the TPS542A50RJMR?

The VSET pin on the TPS542A50RJMR serves as the feedback reference input for output voltage regulation. It must be connected to the midpoint of a resistor divider between the 1.2-V SREF pin and AGND. Since the device includes an internal 5:1 feedback ratio, VSET = 0.2 V yields VOUT = 1.0 V. VSET is programmable from 0.1 V to 1.1 V, covering the full 0.5-V to 5.5-V output range.

Does the TPS542A50RJMR support synchronization to an external clock source?

Yes, the TPS542A50RJMR supports external clock synchronization via the SYNC pin. When the device is operational, SYNC accepts an external clock signal with frequency within ±15% of the internal switching frequency (e.g., 1.2 MHz ±15%). In shutdown mode, a high pulse on SYNC enters programming mode. Minimum sync pulse width is 50 ns, and VIH threshold is 1.35 V.

TPS542A50RJMR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 33-PowerVFQFN

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):: 4V

Voltage - Input (Max):: 18V

Voltage - Output (Min/Fixed):: 0.5V

Voltage - Output (Max):: 5.5V

Current - Output:: 15A

Frequency - Switching:: 400kHz ~ 2.2MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 33-VQFN-HR (4.5x4)

TPS542A50RJMR FAQ

1.How can I place an order for TPS542A50RJMR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS542A50RJMR 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 TPS542A50RJMR reliable?

The price and inventory of TPS542A50RJMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS542A50RJMR is usually 5 days.

3.What payment methods are accepted for TPS542A50RJMR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS542A50RJMR transactions.

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4.How is shipping managed for TPS542A50RJMR?

TPS542A50RJMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS542A50RJMR 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 TPS542A50RJMR?

For technical support, including TPS542A50RJMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS542A50RJMR requirements.

6.How does Aetrix verify that TPS542A50RJMR is sourced from the original manufacturer or authorized distributors?

All TPS542A50RJMR 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 TPS542A50RJMR meets industry standards.

7.What is the process for return or replacement of TPS542A50RJMR?

All TPS542A50RJMR units undergo pre-shipment inspection (PSI). If there is an issue with TPS542A50RJMR, 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 TPS542A50RJMR part is unused and in its original packaging.

Return procedure for TPS542A50RJMR:

1.Submit a request within 90 days.

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

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