4.5-V to 24-V input, 10-A, synchronous step-down regulator
Product details
Parameters
Package | Pins | Size
Features
- Input voltage range: 4.5 V to 24 V
- Output voltage range: 0.6 V to 5.5 V
- Supports 10-A continuous output current
- D-CAP3™ architecture control for fast transient response
- 0.6 V ± 1% feedback voltage accuracy (25°C)
- Integrated 17-mΩ and 5.9-mΩ FETs
- ULQ™ operation (110 µA) to enable long battery life during system standby
- Selectable Eco-mode™ and Out-of-Audio™ by MODE pin
- 500-kHz and 800-kHz selectable switching frequency
- Adjustable soft-start time with default internal 1.2 ms
- Large duty cycle operation
- Integrated power-good indicator
- Built-in output discharge function
- Cycle-by-cycle overcurrent protection
- Latched output OV and UV protections
- Non-latched UVLO and OT protections
- -40°C to 125°C Operating junction temperature
- 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package
- Pin-to-pin compatible with 12-A TPS56C230
- Create a custom design using the TPS51397A with the WEBENCH® Power Designer
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Description
The device is a monolithic 10-A synchronous buck converter with integrated MOSFETs that enable high efficiency and offers ease-of-use with minimum external component count for space-conscious power systems.
The TPS51397A employs D-CAP3™ control that provides fast transient response and excellent line and load regulation with internal compensation. The ULQ™ (Ultra Low Quiescent) feature is extremely beneficial for long battery life in low power operation. The large duty operation greatly improves the load transient performance when input voltage is low.
The MODE pin can be used to set Eco-mode™ or Out-of-Audio™ (OOA) mode for light-load operation and 500-kHz or 800-kHz switching frequency. The Eco-mode™ maintains high efficiency during light load operation. The OOA mode keeps the switching frequency above audible frequency with minimum reduction in efficiency.
The device supports both internal and external soft-start options. It has an internal fixed soft-start time of 1.2 ms. If the application needs a longer soft-start time, the external SS pin can be connected to an external capacitor.
The TPS51397A integrates a power-good indicator and provides an output discharge function. It provides complete protection including OVP, UVP, OCP, OTP, and UVLO. The device is available in a 20-pin 3.0-mm x 3.0-mm HotRod™ package and the junction temperature is specified from –40°C to 125°C.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | TPS51397A 4.5-V to 24-V, 10-A Synchronous Buck Converter with ULQ™ Operation datasheet (Rev. A) | Oct. 12, 2020 |
| Application note | Stability Analysis and Design of D-CAP2 and D-CAP3 Converter | Jun. 09, 2021 | |
| Application note | Measuring the Bode Plot for D-CAPx DC/DC Converters | May 25, 2021 | |
| User guide | TPS51397A Step-Down Converter Evaluation Module User's Guide (Rev. A) | Apr. 23, 2021 | |
| Application note | Non-Isolated DC/DC Solutions for Alder Lake in Notebook Computing Applications | Jan. 08, 2021 | |
| Technical article | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- 4.5-V to 24-V input voltage range
- 0.6-V to 5.5-V output voltage range
- Up to 10-A output Current
- Eco-mode and OOA mode
- Fast transient response
- 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
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CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| VQFN-HR (RJE) | 20 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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