Product details

Vin (Min) (V) 4 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 7 Iout (Max) (A) 20 Iq (Typ) (uA) 1200 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 Rating Catalog Regulated outputs (#) 1 Control mode ACM/AECM Duty cycle (Max) (%) 94
Vin (Min) (V) 4 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 7 Iout (Max) (A) 20 Iq (Typ) (uA) 1200 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 Rating Catalog Regulated outputs (#) 1 Control mode ACM/AECM Duty cycle (Max) (%) 94
  • Fixed-frequency, internally compensated advanced current mode (ACM) control
  • Integrated 6.5-mΩ and 2-mΩ MOSFETs
  • 4-V to 18-V input voltage range
  • 0.5-V to 7-V output voltage range
  • True differential remote sense amplifier (RSA)
  • Three selectable PWM ramp options to optimize the control loop performance
  • Five selectable switching frequencies: 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz
  • Synchronizable to an external clock
  • 0.5 V, ±1% voltage reference accuracy over full temperature range
  • Selectable soft start times: 1 ms, 2 ms, 4 ms, and 8 ms
  • Monotonic start-up into prebiased outputs
  • Selectable current limits to support 20-A and 16-A 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
  • 2.5-mm × 4.5-mm, 17-pin WQFN-HR package with 0.5-mm pitch
  • Lead-free (RoHS compliant)
  • Pin compatible with the TPS543A26 and TPS543A22
  • PSpice and SIMPLIS models available
  • Fixed-frequency, internally compensated advanced current mode (ACM) control
  • Integrated 6.5-mΩ and 2-mΩ MOSFETs
  • 4-V to 18-V input voltage range
  • 0.5-V to 7-V output voltage range
  • True differential remote sense amplifier (RSA)
  • Three selectable PWM ramp options to optimize the control loop performance
  • Five selectable switching frequencies: 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz
  • Synchronizable to an external clock
  • 0.5 V, ±1% voltage reference accuracy over full temperature range
  • Selectable soft start times: 1 ms, 2 ms, 4 ms, and 8 ms
  • Monotonic start-up into prebiased outputs
  • Selectable current limits to support 20-A and 16-A 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
  • 2.5-mm × 4.5-mm, 17-pin WQFN-HR package with 0.5-mm pitch
  • Lead-free (RoHS compliant)
  • Pin compatible with the TPS543A26 and TPS543A22
  • PSpice and SIMPLIS models available

The TPS543B22 is a high-efficiency 18-V, 20-A 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 0.5 V to 7 V. The device is capable of providing high efficiency while operating at a switching frequency up to 2.2 MHz, making it optimal for designs requiring a small solution size. The fixed frequency controller can operate from 500 kHz to 2.2 MHz 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 2.5-mm × 4.5-mm HotRod™ WQFN-FCRLF package.

The TPS543B22 is a high-efficiency 18-V, 20-A 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 0.5 V to 7 V. The device is capable of providing high efficiency while operating at a switching frequency up to 2.2 MHz, making it optimal for designs requiring a small solution size. The fixed frequency controller can operate from 500 kHz to 2.2 MHz 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 2.5-mm × 4.5-mm HotRod™ WQFN-FCRLF package.

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* Data sheet TPS543B22 4-V to 18-V Input, 20-A Synchronous SWIFT™ Step-Down Converter with Internally Compensated Advanced Current Mode Control datasheet PDF | HTML 30 Aug 2022
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

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