Product details

Vin (Min) (V) 4 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 7 Iout (Max) (A) 3 Iq (Typ) (uA) 1200 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 2200 Features Adjustable Current Limit, 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 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 7 Iout (Max) (A) 3 Iq (Typ) (uA) 1200 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 2200 Features Adjustable Current Limit, 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 Rating Catalog Regulated outputs (#) 1
VQFN-HR (RPY) 14 8 mm² 3 x 2.5
  • Fixed-frequency, internally-compensated advanced current mode (ACM) control
  • Integrated 25-mΩ and 13.9-mΩ MOSFETs
  • Input voltage range: 4 V to 18 V
  • Output voltage range: 0.5 V to 7 V
  • 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, ±0.5% voltage reference accuracy over full temperature range
  • Selectable soft start times: 0.5 ms, 1 ms, 2 ms, and 4 ms
  • Monotonic start-up into pre-biased outputs
  • Selectable current limits to support 3-A and 2-A operation
  • Enable with adjustable input undervoltage lockout
  • Power good output monitor
  • Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
  • Pin-to-pin compatible with TPS543820 and TPS543620
  • –40°C to 150°C operating junction temperature
  • 2.5-mm × 3-mm, 14-pin VQFN-HR package with 0.5-mm pitch
  • Fixed-frequency, internally-compensated advanced current mode (ACM) control
  • Integrated 25-mΩ and 13.9-mΩ MOSFETs
  • Input voltage range: 4 V to 18 V
  • Output voltage range: 0.5 V to 7 V
  • 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, ±0.5% voltage reference accuracy over full temperature range
  • Selectable soft start times: 0.5 ms, 1 ms, 2 ms, and 4 ms
  • Monotonic start-up into pre-biased outputs
  • Selectable current limits to support 3-A and 2-A operation
  • Enable with adjustable input undervoltage lockout
  • Power good output monitor
  • Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
  • Pin-to-pin compatible with TPS543820 and TPS543620
  • –40°C to 150°C operating junction temperature
  • 2.5-mm × 3-mm, 14-pin VQFN-HR package with 0.5-mm pitch

The TPS543320 is a high-efficiency 18-V, 3-A synchronous buck converter employing an internally-compensated, fixed-frequency Advanced Current Mode control. It is capable of providing high efficiency while running at a switching frequency up to 2.2 MHz. The device is in a small 2.5-mm × 3-mm HotRod™ VQFN package, which coupled with high efficiency at high frequency, makes 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, selectable soft start times, montonic start-up into pre-biased outputs, selectable current limits, adjustable UVLO through the EN pin, and a full suite of fault protections.

The TPS543320 is a high-efficiency 18-V, 3-A synchronous buck converter employing an internally-compensated, fixed-frequency Advanced Current Mode control. It is capable of providing high efficiency while running at a switching frequency up to 2.2 MHz. The device is in a small 2.5-mm × 3-mm HotRod™ VQFN package, which coupled with high efficiency at high frequency, makes 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, selectable soft start times, montonic start-up into pre-biased outputs, selectable current limits, adjustable UVLO through the EN pin, and a full suite of fault protections.

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Technical documentation

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Type Title Date
* Data sheet TPS543320 4-V to 18-V Input, 3-A Synchronous SWIFT™ Step-Down Converter with Internally Compensated Advanced Current Mode Control datasheet (Rev. B) 29 Jun 2021
Application note Point-of-Load Solutions for Network Interface Cards (NIC) 08 Sep 2021
User guide TPS543320 SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) 06 May 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

Design & development

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Evaluation board

TPS543320EVM — 4-V to 18-V, 3-A synchronous SWIFT™ step-down converter evaluation module

The TPS543620EVM is an evaluation module (EVM) for the TPS543620. The TPS543620 is a synchronous buck converter, integrating both power MOSFETs with low drain to source resistance to minimize solution size and provide high-efficiency at full load. The TPS543620 uses fixed frequency advanced (...)
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TPS543320 PSpice Transient Model

SLUM788.ZIP (338 KB) - PSpice Model
Simulation model

TPS543320 SIMPLIS Transient and Average Model

SLVMDI6.ZIP (1116 KB) - SIMPLIS Model
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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 (...)
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VQFN-HR (RPY) 14 View options

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