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

Texas Instruments TPS542A52RJMR

Name: TPS542A52RJMR
Brand: Texas Instruments
SKU: TPS542A52RJMR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS542A52RJMR

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 33-PowerVFQFN

Datasheet:: TPS542A52RJMR.pdf

Description:: IC REG BUCK ADJ 15A 33VQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TPS542A52 from Texas Instruments is a 4-V to 18-V input, 15-A synchronous buck converter with fully differential remote sense, fixed-frequency voltage-mode control, and selectable internal compensation. It integrates 9.1-mΩ high-side and 2.6-mΩ low-side MOSFETs, supports 0.5-V to 5.5-V output, and operates up to +150°C junction temperature - enabling high-density point-of-load regulation in wireless infrastructure power supplies.

For engineers reviewing the TPS542A52 datasheet, TPS542A52 pinout, TPS542A52 application, or TPS542A52 equivalent, key selection criteria include remote-sense accuracy under load transients, seven programmable switching frequencies (400 kHz–2.2 MHz), monotonic pre-biased start-up, and PFM/FCCM light-load efficiency modes - all critical for analog front-end and medical imaging power rails.

Technical Context

The TPS542A52 implements a digital PWM modulator with <12-ns minimum on-time and 85-ns minimum off-time, enabling high-step-down ratios at 2.2-MHz operation. Its voltage-control loop uses pin-strapped internal compensation networks - 15 total settings across four per frequency bin - optimized for ceramic output capacitors and wide inductance ranges.

Differential remote sensing employs a dedicated RSP/RSN pair with 7-MHz unity-gain bandwidth, 83-dB open-loop gain, and ±0.25-mV combined offset, delivering sub-15-mV output voltage accuracy over –40°C to +150°C. The device synchronizes to external clocks within ±10% to ±15% of its programmed f_SW, and features dual UVLO thresholds (VIN: 3.85 V / 3.6 V; VREG: 2.8 V / 2.6 V) with independent hysteresis.

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 architectures without external LDO pre-regulation.
Output Current	15 A continuous - enabled by integrated 9.1-mΩ/2.6-mΩ MOSFETs and 4-mm × 4.5-mm thermally enhanced VQFN package.
Output Voltage Range	0.5 V to 5.5 V - set via resistor divider from 1.2-V SREF to VSET, with 1/5 scaling for remote-sense feedback.
Switching Frequency	400 kHz to 2.2 MHz - selected by resistor on FSEL pin; enables optimization of inductor size, efficiency, and EMI filtering.
Remote Sense Accuracy	±15 mV at 1 VOUT over –40°C to +150°C - achieved via fully differential amplifier with 2.5-V/µs slew rate and 7-MHz bandwidth.
Light-Load Efficiency Mode	Selectable PFM or FCCM - PFM reduces quiescent current to 1.8 mA at no load; FCCM maintains fixed frequency for predictable EMI.
Junction Temperature Range	–40°C to +150°C - validated for wireless base station RF power amplifiers and medical CT detector modules.

Pinout & Package

TPS542A52 is housed in a 33-pin VQFN (RJM) package measuring 4.5 mm × 4.0 mm with exposed thermal pad. Pin layout supports high-current PVIN/PGND routing and isolated analog ground (AGND) for precision remote sensing.

Pin/Terminal	Circuit Role	Design Meaning
AVIN	Analog supply input	Controller bias rail; requires RC filter (10 Ω + 100 nF–1 µF) from PVIN to reduce noise coupling into control circuitry.
BOOT	High-side gate drive bootstrap	Connects to SW node via external capacitor; enables 5.5-V gate drive for high-side MOSFET with 0.16–0.3-V forward drop.
COMP	Compensation network interface	Resistor-to-ground selects one of four internal compensation networks per frequency bin - eliminates external Type-II/III compensators.
EN	Enable and UVLO control	1.2-V threshold with 5-µA hysteresis current; supports adjustable input UVLO via resistor divider from VIN to AGND.
FSEL	Frequency selection	Resistor-to-ground sets one of seven frequencies (400 kHz–2.2 MHz); short to ground selects default 1-MHz operation.
ILIM	Overcurrent limit programming	Resistor-to-ground configures six OCP thresholds (4.66 A–22 A); required for snubber design at >13-A OCP in 2-MHz mode.
PGD	Power good indicator	Open-drain output with 4.1–9.1-Ω on-resistance; asserts after soft-start completion with 500-µs delay and 100-ns OVP/UVP response.
RSP / RSN	Differential remote sense inputs	Direct connection to load VOUT+ and return; internal 5:1 divider means VSET = VOUT/5 - eliminates external feedback resistors.
SREF	1.2-V reference output	Stable 1.2-V source with 200-µA sourcing capability; must drive only VSET divider - no additional loads permitted.
SS/PFM	Soft-start slew rate & PFM enable	Resistor-to-ground selects one of four soft-start times (0.45–3.6 ms) and enables/disables PFM mode; grounded for default PFM.
SYNC	External clock synchronization	Accepts CMOS clock within ±10% to ±15% of programmed f_SW; internal pulldown allows floating for standalone operation.
VSET	Control loop reference input	Midpoint of SREF-to-AGND divider; sets output as VOUT = 5 × VSET - tolerance-critical for <±15-mV accuracy at 1 VOUT.

Key Features

Feature	Design Value
Integrated Power Stage	9.1-mΩ high-side + 2.6-mΩ low-side MOSFETs deliver >90% efficiency at 12-V_IN/1-V_OUT/10-A, reducing BOM count and PCB area vs discrete solutions.
Differential Remote Sensing	7-MHz bandwidth, 83-dB gain, and ±0.25-mV offset ensure <±0.5% output regulation accuracy under PCB trace IR drops up to 50 mΩ.
Monotonic Pre-Biased Start-Up	Starts cleanly into 0–100% pre-biased outputs without reverse current or output voltage undershoot - verified in Figures 6-16–6-19.
Selectable Light-Load Mode	PFM reduces no-load IQ to 1.8 mA while maintaining regulation; FCCM preserves EMI predictability during dynamic load steps.
Thermal Robustness	150°C max junction temperature and 22.3°C/W θ_JA on EVM PCB support 15-A operation at 70°C ambient with natural convection cooling.

Applications

Wireless Infrastructure Power	Analog Front-End Regulation
Use Scenario: Powering RF transceiver ASICs and beamforming ICs in 5G massive MIMO base stations with tight thermal constraints. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1-V/15-A supply with differential remote sense to compensate for PCB voltage drop across backplane traces. Use Value: Maintains ±15-mV output accuracy over –40°C to +150°C junction range and supports 2.2-MHz switching for compact 100-nH inductors.	Use Scenario: Supplying low-noise, high-precision ADC/DAC bias rails in cellular small-cell radio units requiring sub-1% load regulation. IC Role / Device Role / Timing Role: High-accuracy buck converter using SREF/VSET reference scaling and RSP/RSN remote sense to reject board-level IR losses. Use Value: Achieves ±13-mV accuracy at 1 VOUT over –40°C to +125°C, with 100-ns OVP/UVP response to protect sensitive analog components.
Medical Imaging Detector Power	Test & Measurement Equipment
Use Scenario: Providing regulated 5-V/12-A power to CT/X-ray detector ASIC arrays where thermal management and long-term stability are critical. IC Role / Device Role / Timing Role: High-current synchronous buck with 400-kHz switching option to minimize EMI in sensitive imaging signal chains. Use Value: Delivers >92% efficiency at 12-V_IN/5-V_OUT/12-A (Figure 6-5), with thermal shutdown at 160°C and 15°C hysteresis for safe fault recovery.	Use Scenario: Generating clean, adjustable low-voltage rails (0.5–5.5 V) for FPGA I/O banks and high-speed SERDES in automated test equipment. IC Role / Device Role / Timing Role: Programmable buck converter with seven frequency options and selectable soft-start to meet diverse system timing requirements. Use Value: Enables 0.45-ms to 3.6-ms soft-start via SS/PFM pin, preventing inrush current in multi-rail systems with sequenced power-up.

Wireless Infrastructure Power

Analog Front-End Regulation

Use Scenario: Powering RF transceiver ASICs and beamforming ICs in 5G massive MIMO base stations with tight thermal constraints.

IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1-V/15-A supply with differential remote sense to compensate for PCB voltage drop across backplane traces.

Use Value: Maintains ±15-mV output accuracy over –40°C to +150°C junction range and supports 2.2-MHz switching for compact 100-nH inductors.

Use Scenario: Supplying low-noise, high-precision ADC/DAC bias rails in cellular small-cell radio units requiring sub-1% load regulation.

IC Role / Device Role / Timing Role: High-accuracy buck converter using SREF/VSET reference scaling and RSP/RSN remote sense to reject board-level IR losses.

Use Value: Achieves ±13-mV accuracy at 1 VOUT over –40°C to +125°C, with 100-ns OVP/UVP response to protect sensitive analog components.

Medical Imaging Detector Power

Test & Measurement Equipment

Use Scenario: Providing regulated 5-V/12-A power to CT/X-ray detector ASIC arrays where thermal management and long-term stability are critical.

IC Role / Device Role / Timing Role: High-current synchronous buck with 400-kHz switching option to minimize EMI in sensitive imaging signal chains.

Use Value: Delivers >92% efficiency at 12-V_IN/5-V_OUT/12-A (Figure 6-5), with thermal shutdown at 160°C and 15°C hysteresis for safe fault recovery.

Use Scenario: Generating clean, adjustable low-voltage rails (0.5–5.5 V) for FPGA I/O banks and high-speed SERDES in automated test equipment.

IC Role / Device Role / Timing Role: Programmable buck converter with seven frequency options and selectable soft-start to meet diverse system timing requirements.

Use Value: Enables 0.45-ms to 3.6-ms soft-start via SS/PFM pin, preventing inrush current in multi-rail systems with sequenced power-up.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2964GQKT-Z	4.5–18-V input, 15-A, 500-kHz–2.2-MHz programmable f_SW, but lacks differential remote sense and monotonic pre-bias start-up.	Requires external sense resistors and external soft-start circuitry for pre-biased loads - increases BOM and layout complexity.	Choose MP2964GQKT-Z only when differential remote sensing is unnecessary and cost-per-watt is prioritized over design simplicity.
ISL8206MIRZ	3–14-V input, 10-A, integrated PMBus interface and telemetry, but limited to 1-MHz max f_SW and no PFM mode.	Supports digital configuration and real-time monitoring, but cannot match TPS542A52's 2.2-MHz high-frequency operation or light-load PFM efficiency.	Choose ISL8206MIRZ when system-level telemetry and firmware-controlled margining are required, not for high-frequency or ultra-low-IQ designs.

Compared with MP2964GQKT-Z and ISL8206MIRZ, the TPS542A52 uniquely combines differential remote sensing, monotonic pre-biased start-up, and selectable PFM/FCCM modes - making it optimal for analog-sensitive, thermally constrained, and high-step-down applications where output accuracy and transient immunity are non-negotiable.

Availability

TPS542A52 is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging detector modules, and test & measurement equipment requiring stable component supply, full RoHS compliance, and extended temperature support.

Supply support for TPS542A52 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 TPS542A52 belongs to TI's high-current synchronous buck converter product line, designed specifically for demanding point-of-load applications in wireless communications, medical imaging, and industrial test equipment where precision, thermal resilience, and design simplicity are essential.

FAQ

What is the maximum output current rating of the TPS542A52?

The TPS542A52 is rated for 15-A continuous output current under recommended operating conditions (TJ ≤ 150°C, proper thermal layout). This is enabled by its integrated 9.1-mΩ high-side and 2.6-mΩ low-side MOSFETs, 4.5-mm × 4.0-mm VQFN package with exposed thermal pad, and 22.3°C/W θ_JA on EVM PCB. Derating applies above 70°C ambient with natural convection.

How does the TPS542A52 implement differential remote sensing?

The TPS542A52 uses dedicated RSP and RSN pins connected directly to the load's positive output and return points. An internal 5:1 resistor divider scales the sensed voltage, so VSET must be set to VOUT/5. The remote sense amplifier provides 7-MHz bandwidth, 83-dB open-loop gain, and ±0.25-mV offset - ensuring ±15-mV accuracy at 1 VOUT over full temperature range.

Can the TPS542A52 operate with a pre-biased output voltage?

Yes, the TPS542A52 supports monotonic start-up into pre-biased outputs from 0% to 100% of final VOUT, verified in Figures 6-16 through 6-19 of the datasheet. This is achieved via controlled gate drive sequencing and internal current limiting - eliminating reverse current flow and output voltage undershoot during EN-triggered start-up.

What are the switching frequency options for the TPS542A52?

The TPS542A52 offers seven selectable switching frequencies: 400 kHz, 600 kHz, 800 kHz, 1 MHz (default when FSEL shorted), 1.2 MHz, 2 MHz, and 2.2 MHz - set by resistor values (7.5 kΩ to 78.7 kΩ) on the FSEL pin. The SYNC pin also accepts external clocks within ±10% to ±15% of the programmed f_SW.

Does the TPS542A52 support both PFM and FCCM light-load efficiency modes?

Yes, the TPS542A52 supports selectable PFM (pulse-frequency modulation) or FCCM (forced continuous conduction mode) via the SS/PFM pin. Grounding SS/PFM enables PFM, reducing no-load quiescent current to 1.8 mA at 12-V_IN. Leaving SS/PFM open or applying voltage selects FCCM for consistent EMI profile during light-load transients.

TPS542A52RJMR 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)

TPS542A52RJMR FAQ

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6.How does Aetrix verify that TPS542A52RJMR is sourced from the original manufacturer or authorized distributors?

All TPS542A52RJMR 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 TPS542A52RJMR meets industry standards.

7.What is the process for return or replacement of TPS542A52RJMR?

All TPS542A52RJMR units undergo pre-shipment inspection (PSI). If there is an issue with TPS542A52RJMR, 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 TPS542A52RJMR part is unused and in its original packaging.

Return procedure for TPS542A52RJMR:

1.Submit a request within 90 days.

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

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