Calculation tool
Data sheet
TPS543320
- 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.
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Technical documentation
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View all 8 | 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 | |
| EVM User's guide | TPS543320 SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) | PDF | HTML | 06 May 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 (...)
Simulation model
TPS543320 SIMPLIS Transient and Average Model
SLVMDI6.ZIP (1116 KB) - SIMPLIS Model
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN-HR (RPY) | 14 | Ultra Librarian |
Ordering & quality
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