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TPS546B24A

ACTIVE

2.95-V to 18-V input, stackable 20-A, SWIFT™ synchronous buck converter with pin-strapping/PMBus®

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Product details

Parameters

Vin (Min) (V) 2.95 Vin (Max) (V) 18 Vout (Min) (V) 0.25 Vout (Max) (V) 5.5 Iout (Max) (A) 20 Iq (Typ) (uA) 9000 Switching frequency (Min) (kHz) 225 Switching frequency (Max) (kHz) 1500 Features Adaptive/Dynamic Voltage Scaling, Adjustable Current Limit, Differential Remote Sense, Enable, Forced PWM, Frequency Synchronization, Over Current Protection, I2C/PMBus, Phase Interleaving, Power Good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO Adjustable, Voltage Margining Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

LQFN-CLIP (RVF) 40 35 mm² 7 x 5 open-in-new Find other Buck converters (integrated switch)

Features

  • Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
  • Integrated 5.5-mΩ/1.8-mΩ MOSFETs
  • Average current mode control with selectable internal compensation
  • 2×, 3×, 4× stackable with current sharing up to 80 A, supporting a single address per output
  • Selectable 0.5-V to 5.5-V output via pin strap or 0.25-V to 5.5-V using PMBus VOUT_COMMAND
  • Extensive PMBus command set with telemetry for VOUT, IOUT and internal die temperature
  • Differential remote sensing with internal FB divider for < 1% VOUT error –40°C to +150°C TJ
  • AVS and margining capabilities through PMBus
  • MSEL pins pin programming PMBus defaults
  • 12 Selectable switching frequencies from 225 kHz to 1.5 MHz (8 pin-strap options)
  • Frequency sync in/sync out
  • Supports prebiased output
  • Supports strongly coupled inductor
  • 7-mm × 5-mm × 1.5-mm, 40-pin QFN, pitch = 0.5 mm
  • Create a Custom Design Using the TPS546B24A With WEBENCH Power Designer

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Description

The TPS546B24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 20-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546B24A devices can be interconnected to provide up to 80 A on a single output. The device has an option to overdrive the internal 5-V LDO with an external 5-V supply via the VDD5 pin to improve efficiency and reduce power dissipation of the converter.

The TPS546B24A uses a proprietary fixed-frequency current-mode control with input feedforward and selectable internal compensation components for minimal size and stability over a wide range of output capacitances.

The PMBus interface with 1-MHz clock support gives a convenient, standardized digital interface for converter configuration as well as monitoring of key parameters including output voltage, output current, and internal die temperature. Response to fault conditions can be set to restart, latch off, or ignore, depending on system requirements. Back-channel communication between stacked devices enables all TPS546B24Aconverters powering a single output rail to share a single address to simplify system software/firmware design. Key parameters including output voltage, switching frequency, soft-start time, and overcurrent fault limits can also be configured through BOM selection without PMBus communication to support program free power-up.

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Same functionality and pinout but is not an equivalent to the compared device:
NEW TPS546A24A ACTIVE 2.95-V to 18-V input, stackable 10-A, SWIFT™ synchronous buck converter with pin-strapping/PMBus® Pin-to-pin 10-A version
NEW TPS546D24A ACTIVE 2.95-V to 16-V input, stackable 40-A, SWIFT™ synchronous buck converter with pin-strapping/PMBus® Pin-to-pin 40-A version

Technical documentation

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Type Title Date
* Datasheet TPS546B24A 2.95-V to 18-V, 20-A, up to 4x Stackable, PMBus Buck Converter datasheet (Rev. A) Sep. 22, 2020
User guide TPS546B24AEVM-1PH Evaluation Module Sep. 03, 2020
More literature TPS546B24AEVM-1PH EU Declaration of Conformity (DoC) Aug. 06, 2020
Technical articles 3 big benefits of small cells May 26, 2020
Application note Minimize On-Time-Jitter and Ripple by Optimizing Compensation May 11, 2020
Technical articles Advantages of scalability: from Peter Parker to pin-strapping Apr. 30, 2020
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles SoC power design: 3 steps to a thermally optimized power supply Mar. 08, 2020
Application note Powering the TPS546D24A Device Family From a Single 3.3-V Input Power Supply (Rev. A) Mar. 04, 2020
More literature TPS546B24AEVM EU Declaration of Conformity (DoC) Feb. 26, 2020
User guide Stacking TPS546B24A Two-Phase Evaluation Module Jul. 30, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
149
Description
The TPS546A24AEVM-1PH is an evaluation module (EVM) for the TPS546A24A 10-A buck converter. The TPS546A24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the PMBus interface.
Features
  • 1.2-V output at 10 A
  • Selectable internal compensation
  • PMBus programmable switching frequency from 225 kHz to 1.5 MHz
  • PMBus telemetry of VIN, VOUT, IOUT, and internal die temperature
  • Adaptive Voltage Scaling (AVS) and margining via PMB
  • Differential Remote Sense with Internal FB divider for <1% total (...)
EVALUATION BOARD Download
199
Description
The TPS546B24AEVM-2PH evaluation module (EVM) is a 40-A, two-phase buck converter with two TPS546B24A devices. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring via the PMBus (...)
Features
  • 2 stacked devices with current sharing
  • Selectable internal compensation
  • PMBus programmable switching frequency from 225 kHz to 1.5 MHz
  • PMBus telemetry of VIN, VOUT, IOUT, and internal die temperature
  • Adaptive voltage scaling (AVS) and margining via PMB
  • Differential remote sense with internal FB divider (...)
EVALUATION BOARD Download
149
Description
The TPS546B24AEVM-1PH is an evaluation module (EVM) for the TPS546B24A 20-A buck converter. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the PMBus interface.
Features
  • 1.2-V output at 20 A
  • Selectable internal compensation
  • PMBus programmable switching frequency from 225 kHz to 1.5 MHz
  • PMBus telemetry of VIN, VOUT, IOUT, and internal die temperature
  • Adaptive voltage scaling (AVS) and margining via PMB
  • Differential remote sense with internal FB divider for <1% total (...)

Design tools & simulation

SIMULATION MODEL Download
SLUM709.ZIP (98 KB) - IBIS Model
SIMULATION MODEL Download
SLUM713.ZIP (258 KB) - PSpice Model
SIMULATION MODEL Download
SLUM715A.ZIP (72 KB) - PSpice Model
SIMULATION MODEL Download
SLUM750.ZIP (1784 KB) - SIMPLIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOL Download
SLUC686A.ZIP (165 KB)

Reference designs

REFERENCE DESIGNS Download
4-Phase, 160-A synchronous buck converter reference design for communications processor power
PMP21814 — This reference design uses four TPS546D24A converters with integrated MOSFETs to support a full load of 160A at a 0.9V output. The system operates at a switching frequency of 650 kHz and has a PMBus interface that can be used to configure key converter parameters, including internal compensation (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
LQFN-CLIP (RVF) 40 View options

Ordering & quality

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  • Ongoing reliability monitoring

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