4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode™
Product details
Parameters
Package | Pins | Size
Features
- D-CAP2™ Mode Enables Fast Transient Response
- Low Output Ripple and Allows Ceramic Output Capacitor
- Wide Input Voltage Range: 4.5 V to 18 V
- Output Voltage Range: 0.76 V to 7 V
- Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
- 100 mΩ (High-Side) and 70 mΩ (Low-Side)
- High Efficiency, Less Than 10 µA at Shutdown
- High Initial Bandgap Reference Accuracy
- Adjustable Soft Start
- Pre-Biased Soft Start
- 700-kHz Switching Frequency (fSW)
- Cycle-By-Cycle Overcurrent Limit
- Auto-Skip Eco-Mode™ for High Efficiency at Light Load
Description
The TPS54328 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54328 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54328 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components.
The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode operation at light loads. Eco-mode allows the TPS54328 to maintain high efficiency during lighter load conditions. The TPS54328 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V input (VIN).
The output voltage can be programmed from 0.76 V to 7 V. The device also features an adjustable soft start time. The TPS54328 is available in 8-pin DDA and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
Same functionality and pinout but is not an equivalent to the compared device:
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | TPS54328 4.5-V to 18-V Input, 3-A Synchronous Step-Down Converter With Eco-Mode™ datasheet (Rev. D) | Aug. 17, 2016 |
| Technical articles | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 | |
| Application notes | Optimize Output Filter on D-CAP2 for Stability Improvement | Jun. 13, 2017 | |
| Application notes | D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- | Jan. 02, 2013 | |
| Selection guides | Power Management Solutions Set-Top Box and Digital TV (Rev. A) | Apr. 18, 2012 | |
| User guides | TPS54328EVM-686 3-A, SWIFT Regulator Evaluation Module | Dec. 15, 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- D-CAP2 Mode Enables Fast Transient Response
- Low Output Ripple and Allows Ceramic Output Capacitor
- Wide Vin Input Voltage Range: 4.5V to 18V
- Output Voltage Range: 0.76 V to 5.5 V
- Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
- High Efficiency, less than 10uA at shutdown
- High (...)
Design tools & simulation
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SO PowerPAD (DDA) | 8 | View options |
| VSON (DRC) | 10 | View options |
Ordering & quality
Support & training
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Training series
View all TI training and videosVideos
Power Tips: Layout for a Buck Power Stage
This video shows a simplified schematic and PCB layout for a buck converter
