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TPS543B22

ACTIVE

4-V to 18-V input, advanced current mode, 20-A synchronous SWIFT™ step-down converter

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Data sheet

TPS543B22

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 18 Vin (min) (V) 4 Vout (max) (V) 7 Vout (min) (V) 0.5 Features Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Operating temperature range (°C) -40 to 150 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 2200 Iq (typ) (µA) 1200 Control mode ACM/AECM Duty cycle (max) (%) 94 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 18 Vin (min) (V) 4 Vout (max) (V) 7 Vout (min) (V) 0.5 Features Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Operating temperature range (°C) -40 to 150 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 2200 Iq (typ) (µA) 1200 Control mode ACM/AECM Duty cycle (max) (%) 94 Type Converter
WQFN-FCRLF (RYS) 17 11.25 mm² 4.5 x 2.5
  • Fixed-frequency, internally compensated, advanced current mode (ACM) control
  • Integrated 6.5mΩ and 2mΩ MOSFETs
  • 4V to 18V input voltage range
  • 0.5V to 7V output voltage range
  • True differential remote sense amplifier (RSA)
  • Three selectable PWM ramp options to optimize the control loop performance
  • Five selectable switching frequencies: 500kHz, 750kHz, 1MHz, 1.5MHz, and 2.2MHz
  • Synchronizable to an external clock
  • 0.5V, ±0.5% voltage reference accuracy over full temperature range
  • 1ms, 2ms, 4ms, and 8ms selectable soft-start times
  • Monotonic start-up into prebiased outputs
  • Selectable current limits to support 20A and 16A operation
  • Enable with adjustable input undervoltage lockout
  • Power-good output monitor
  • Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
  • –40°C to 150°C operating junction temperature
  • 2.5mm × 4.5mm, 17-pin WQFN-HR package with 0.5mm pitch
  • Lead-free (RoHS compliant)
  • Pin compatible with the TPS543A26 and TPS543A22
  • Available in thermally enhanced package TPS543B25T (drop-in compatible)
  • SIMPLIS models available
  • Create a custom design using the TPS543B22 with the WEBENCH® Power Designer
  • Fixed-frequency, internally compensated, advanced current mode (ACM) control
  • Integrated 6.5mΩ and 2mΩ MOSFETs
  • 4V to 18V input voltage range
  • 0.5V to 7V output voltage range
  • True differential remote sense amplifier (RSA)
  • Three selectable PWM ramp options to optimize the control loop performance
  • Five selectable switching frequencies: 500kHz, 750kHz, 1MHz, 1.5MHz, and 2.2MHz
  • Synchronizable to an external clock
  • 0.5V, ±0.5% voltage reference accuracy over full temperature range
  • 1ms, 2ms, 4ms, and 8ms selectable soft-start times
  • Monotonic start-up into prebiased outputs
  • Selectable current limits to support 20A and 16A operation
  • Enable with adjustable input undervoltage lockout
  • Power-good output monitor
  • Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
  • –40°C to 150°C operating junction temperature
  • 2.5mm × 4.5mm, 17-pin WQFN-HR package with 0.5mm pitch
  • Lead-free (RoHS compliant)
  • Pin compatible with the TPS543A26 and TPS543A22
  • Available in thermally enhanced package TPS543B25T (drop-in compatible)
  • SIMPLIS models available
  • Create a custom design using the TPS543B22 with the WEBENCH® Power Designer

The TPS543B22 is a high-efficiency 18V, 20A synchronous buck converter employing an internally compensated, fixed-frequency advanced current mode (ACM) control architecture, which while always operating under FCCM, generates output voltages from 0.5V to 7V. The device is capable of providing high efficiency while operating at a switching frequency up to 2.2MHz, making the device an excellent choice for designs requiring a small solution size. The fixed frequency controller can operate from 500kHz to 2.2MHz and can be synchronized to an external clock using the SYNC pin. Additional features include a high accuracy voltage reference, two-wire remote sense, selectable soft-start times, monotonic start-up into prebiased outputs, selectable current limits, adjustable UVLO through the EN pin, and a full suite of fault protections.

The TPS543B22 is available in a small 2.5mm × 4.5mm HotRod™ WQFN-FCRLF package.

The TPS543B22 is a high-efficiency 18V, 20A synchronous buck converter employing an internally compensated, fixed-frequency advanced current mode (ACM) control architecture, which while always operating under FCCM, generates output voltages from 0.5V to 7V. The device is capable of providing high efficiency while operating at a switching frequency up to 2.2MHz, making the device an excellent choice for designs requiring a small solution size. The fixed frequency controller can operate from 500kHz to 2.2MHz and can be synchronized to an external clock using the SYNC pin. Additional features include a high accuracy voltage reference, two-wire remote sense, selectable soft-start times, monotonic start-up into prebiased outputs, selectable current limits, adjustable UVLO through the EN pin, and a full suite of fault protections.

The TPS543B22 is available in a small 2.5mm × 4.5mm HotRod™ WQFN-FCRLF package.
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Technical documentation

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* Data sheet TPS543B22 4V to 18V Input, 20 A, Synchronous, SWIFT Step-Down Converter With Internally Compensated, Advanced Current Mode Control datasheet (Rev. B) PDF | HTML 15 Feb 2024
EVM User's guide TPS543B22EVM SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 06 Sep 2023
Analog Design Journal 2단계 필터를 사용하여 전압 리플 감소 PDF | HTML 03 May 2023
Analog Design Journal 使用第二級濾波器來減少電壓漣波 PDF | HTML 03 May 2023
Analog Design Journal Using a second stage filter to reduce voltage ripple PDF | HTML 10 Jan 2023

Design & development

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

Evaluation board

TPS543B22EVM — TPS543B22 synchronous buck converter evaluation module

The TPS543B22 evaluation module (EVM) a synchronous buck converter, integrating both power MOSFETs with low drain to source resistance to minimize solution size and provides high efficiency at full load. The TPS543B22EVM uses fixed frequency advanced current mode control with low minimum on-time (...)
User guide: PDF | HTML
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Simulation model

TPS543B22 PSpice Transient Model (Rev. A)

SLVME33A.ZIP (240 KB) - PSpice Model
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Simulation model

TPS543B22 SIMPLIS Transient and Average Model (Rev. A)

SLVMDY4A.ZIP (928 KB) - SIMPLIS Model
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WQFN-FCRLF (RYS) 17 Ultra Librarian
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