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TPS56121

AKTIV

Synchron-SWIFT™-Abwärtswandler von 4,5 V bis 14 V, 15 A

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Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung.
NEU TPS548A23 AKTIV Synchroner Abwärtswandler, 4 V bis 16 V Eingangsspannung, 12 A Higher efficiency in a smaller package

Produktdetails

Rating Catalog Topology Buck Iout (max) (A) 15 Vin (max) (V) 14 Vin (min) (V) 4.5 Vout (max) (V) 12 Vout (min) (V) 0.6 Features Adjustable current limit, Enable, Forced PWM, Overcurrent protection, Power good, Prebias startup, Soft-start adjustable, Synchronous rectification, UVLO Fixed Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 93
Rating Catalog Topology Buck Iout (max) (A) 15 Vin (max) (V) 14 Vin (min) (V) 4.5 Vout (max) (V) 12 Vout (min) (V) 0.6 Features Adjustable current limit, Enable, Forced PWM, Overcurrent protection, Power good, Prebias startup, Soft-start adjustable, Synchronous rectification, UVLO Fixed Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 93
LSON-CLIP (DQP) 22 30 mm² (6 mm × 5 mm)
  • 4.5-V to 14-V Input Voltage Range
  • Incorporates Power Block Technology
  • Up to 15-A Output Current
  • Fixed-Frequency Options of 300 kHz, 500 kHz,
    and 1 MHz
  • High-Side and Low-Side MOSFET RDS(on) Sensing
  • Programmable Soft-Start
  • 600-mV Reference Voltage With 1% Accuracy
  • Voltage Mode Control with Feed-Forward
  • Supports Prebiased Output
  • Thermal Shutdown
  • 22-Pin 5-mm × 6-mm PQFN PowerPAD™ Package
  • For SWIFT Power Products Documentation,
    see http://www.ti.com/swift
  • 4.5-V to 14-V Input Voltage Range
  • Incorporates Power Block Technology
  • Up to 15-A Output Current
  • Fixed-Frequency Options of 300 kHz, 500 kHz,
    and 1 MHz
  • High-Side and Low-Side MOSFET RDS(on) Sensing
  • Programmable Soft-Start
  • 600-mV Reference Voltage With 1% Accuracy
  • Voltage Mode Control with Feed-Forward
  • Supports Prebiased Output
  • Thermal Shutdown
  • 22-Pin 5-mm × 6-mm PQFN PowerPAD™ Package
  • For SWIFT Power Products Documentation,
    see http://www.ti.com/swift

The TPS56121 device is a high-efficiency and high-current synchronous buck converter designed to operate from a supply of 4.5 V to 14 V. The device can produce an output voltage as low as 0.6 V at loads up to 15 A. Integrated NexFET™ Power MOSFETs provide a small footprint and ease of use.

The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change.

The TPS56121 is available in a thermally enhanced 22-pin PQFN (DQP) PowerPAD package.

The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation. OCP levels are programmed by a single external resistor connected from the ILIM pin to the circuit ground. During the initial power-on sequence, the device enters a calibration cycle, measures the voltage at the ILIM pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition and then enters a shutdown/restart cycle until the fault is removed.

The TPS56121 device is a high-efficiency and high-current synchronous buck converter designed to operate from a supply of 4.5 V to 14 V. The device can produce an output voltage as low as 0.6 V at loads up to 15 A. Integrated NexFET™ Power MOSFETs provide a small footprint and ease of use.

The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change.

The TPS56121 is available in a thermally enhanced 22-pin PQFN (DQP) PowerPAD package.

The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation. OCP levels are programmed by a single external resistor connected from the ILIM pin to the circuit ground. During the initial power-on sequence, the device enters a calibration cycle, measures the voltage at the ILIM pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition and then enters a shutdown/restart cycle until the fault is removed.

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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt TPS56121 4.5-V to 14-V Input High-Current Synchronous Buck SWIFT™ Converter datasheet (Rev. D) PDF | HTML 09.02.2016
Anwendungshinweis Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25.03.2024
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 29.08.2023
Analog Design Journal Using a second stage filter to reduce voltage ripple PDF | HTML 10.01.2023
Anwendungshinweis Calculating Efficiency (Rev. A) 06.03.2020
Auswahlhilfe SWIFT DC/DC Converters Selector Guide (Rev. G) 06.02.2019
Auswahlhilfe Power Management Guide 2018 (Rev. R) 25.06.2018
Anwendungshinweis Analysis and Design of Input Filter for DC-DC Circuit 27.11.2017
Anwendungshinweis An Efficient LDO-less Power Supply Solution for AFE76xx 13.11.2017
Anwendungshinweis Demystifying Type II and Type III Compensators Using Op-Amp and OTA for DC/DC Co 11.07.2014
Anwendungshinweis Understanding Thermal Dissipation and Design of a Heatsink 04.05.2011

Design und Entwicklung

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Evaluierungsplatine

TPS56121EVM-601 — Evaluierungsmodul für TPS56121 Hochstrom (15 A)-Synchron-bwärts-SWIFT™-Wandler

The Texas Instruments TPS56121EVM-601 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS56121 4.5V to 14V Input, 15A High Current Synchronous Step-Down Converter. The EVM is designed to use a regulated 12V (8V to 14V) bus voltage to provide a regulated 1.0-V (...)
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Simulationsmodell

TPS56121 TINA TI Start-Up Reference Design

SLUM143.TSC (900 KB) - TINA-TI-Referenzdesign
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TPS56121 TINA-TI Average Reference Design

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TPS56121 TINA-TI Average Spice Model

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TPS56121 TINA-TI Steady State Reference Design

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TPS56121 TINA-TI Transient Spice Model

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TPS56121 Unencrypted PSpice Transient Model Package (Rev. A)

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TPS56121/221 Unencrypted PSpice Average Model Package (Rev. A)

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Referenzdesign

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PMP6776 is a low-cost non-isolated synchronous buck power supply. This design uses TPS56121 and TPS54620 Synchronous Buck Converters and TPS54425 and TPS54225 Step-Down Switchers to generate 7 outputs. Features include input voltage range 10.8V to 13.2V and outputs 1V at 6A, 1.5V at 4A, 1.8V at 6A, (...)

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