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TPS543A22

ACTIVE

4-V to 18-V input, advanced current mode, 12-A, synchronous SWIFT™ step-down converter

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Data sheet

TPS543A22

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 4 Vin (max) (V) 18 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 2200 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 Control mode ACM/AECM Vout (min) (V) 0.5 Vout (max) (V) 7 Iq (typ) (µA) 1200 Duty cycle (max) (%) 94
Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 4 Vin (max) (V) 18 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 2200 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 Control mode ACM/AECM Vout (min) (V) 0.5 Vout (max) (V) 7 Iq (typ) (µA) 1200 Duty cycle (max) (%) 94
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 12A and 8A 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 25A - TPS543B25, 20A - TPS543B22, and 16A - TPS543A26
  • Available in thermally enhanced package TPS543B25T (drop-in compatible)
  • SIMPLIS models available
  • Create a custom design using the TPS543A22 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 12A and 8A 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 25A - TPS543B25, 20A - TPS543B22, and 16A - TPS543A26
  • Available in thermally enhanced package TPS543B25T (drop-in compatible)
  • SIMPLIS models available
  • Create a custom design using the TPS543A22 with the WEBENCH® Power Designer

The TPS543A22 is a high-efficiency 18V, 12A 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 TPS543A22 is available in a small 2.5mm × 4.5mm HotRod™ WQFN-FCRLF package.

The TPS543A22 is a high-efficiency 18V, 12A 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 TPS543A22 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 TPS543A22 4V to 18V Input, 12 A, Synchronous, SWIFT Step-Down Converter With Internally Compensated, Advanced Current Mode Control datasheet (Rev. A) PDF | HTML 15 Feb 2024
Application note Optimizing EMI Performance in Buck Regulators for Medical Imaging Applications PDF | HTML 13 Aug 2024

Design & development

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Simulation model

TPS543B22 SIMPLIS Transient and Average Model (Rev. A)

SLVMDY4A.ZIP (928 KB) - SIMPLIS Model
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Package Pins CAD symbols, footprints & 3D models
WQFN-FCRLF (RYS) 17 Ultra Librarian
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