Home Power management AC/DC & DC/DC converters (integrated FET)
Home
Power management
AC/DC & DC/DC converters (integrated FET)

TPS543320

ACTIVE

4-V to 18-V, 3-A synchronous SWIFT™ step-down converter

Order now
Data sheet

TPS543320

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 18 Vin (min) (V) 4 Vout (max) (V) 7 Vout (min) (V) 0.5 Features Adjustable current limit, Enable, Forced PWM, Frequency synchronization, Overcurrent protection, Power good, Prebias startup, Soft-start adjustable, Synchronous rectification, UVLO adjustable EMI features Low parasitic Hotrod packaging Control mode ACM/AECM Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 1200 Duty cycle (max) (%) 94 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 18 Vin (min) (V) 4 Vout (max) (V) 7 Vout (min) (V) 0.5 Features Adjustable current limit, Enable, Forced PWM, Frequency synchronization, Overcurrent protection, Power good, Prebias startup, Soft-start adjustable, Synchronous rectification, UVLO adjustable EMI features Low parasitic Hotrod packaging Control mode ACM/AECM Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 1200 Duty cycle (max) (%) 94 Type Converter
VQFN-HR (RPY) 14 7.5 mm² 2.5 x 3
  • 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. The device 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. The device 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.
filter Find other AC/DC & DC/DC converters (integrated FET)
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
TPS543620 ACTIVE 4-V to 18-V input, advanced current mode, 6-A synchronous SWIFT™ step-down converter Pin-to-pin version with 6-A output current
TPS543820 ACTIVE 4-V to 18-V, 8-A synchronous SWIFT™ step-down converter Pin-to-pin version with 8-A output current
Similar functionality to the compared device
TPSM843320 ACTIVE 4-V to 18-V input, advanced current mode, 3-A synchronous SWIFT™ step-down power module Module version featuring an integrated inductor

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 7
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. C) PDF | HTML 27 Apr 2023
More literature Low-Noise and Low-Ripple Techniques for a Supply Without an LDO (Rev. C) PDF | HTML 19 Feb 2025
Application note Synchronization to a Clock Signal Using AC Coupling PDF | HTML 07 Aug 2024
Application note Detailed Comparison Between TPSM843620 Family and TPS543620 Family PDF | HTML 20 Nov 2023
Application brief Solving power design challenges in oscilloscope applications PDF | HTML 31 Oct 2023
More literature Low-noise and low-ripple techniques for a supply without an LDO PPT 02 Dec 2021
Application note Point-of-Load Solutions for Network Interface Cards (NIC) PDF | HTML 08 Sep 2021

Design & development

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

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 (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS543320 PSpice Transient Model

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

TPS543320 SIMPLIS Transient and Average Model

SLVMDI6.ZIP (1116 KB) - SIMPLIS Model
Download
Calculation tool

SLURAZ9 — TPS543320 TPS543620 TPS543820 Calculator Tool and Schematic Checklist

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
  • TPS543320 — 4-V to 18-V, 3-A synchronous SWIFT™ step-down converter
  • TPS543620 — 4-V to 18-V input, advanced current mode, 6-A synchronous SWIFT™ step-down converter
  • TPS543820 — 4-V to 18-V, 8-A synchronous SWIFT™ step-down converter
  • TPS543820E — 4-V to 18-V, 8-A, synchronous step-down converter extended temperature
Download
Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RPY) 14 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos