TPS54478 Series
2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter with Hiccup Current Limit
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Supplied Contents | Voltage - Output▲▼ | Main Purpose | Utilized IC / Part | Board Type | Frequency - Switching▲▼ | Current - Output▲▼ | Outputs and Type | Outputs and Type▲▼ | Voltage - Input▲▼ | Voltage - Input▲▼ | Package / Case | Output Type | Voltage - Output (Max)▲▼ | Voltage - Output (Min/Fixed)▲▼ | Function | Number of Outputs▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Mounting Type | Topology | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Voltage - Input (Max)▲▼ | Output Configuration | Voltage - Input (Min)▲▼ | Synchronous Rectifier▲▼ | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS54478EVM-037TPS54478 - DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board | Board(s) | 1.7999999523162842 V | DC/DC, Step Down | TPS54478 | Fully Populated | 2000000 Hz | 4 A | Non-Isolated | 1 ul | 2.950000047683716 V | 6 V | |||||||||||||||||
Texas Instruments TPS54478RTERBuck Switching Regulator IC Positive Adjustable 0.6V 1 Output 4A 16-WFQFN Exposed Pad | 4 A | 16-WFQFN Exposed Pad | Adjustable | 4.5 V | 0.6000000238418579 V | Step-Down | 1 ul | 150 °C | -40 °C | Surface Mount | Buck | 200000 Hz | 2000000 Hz | 6 V | Positive | 2.950000047683716 V | 16-WQFN (3x3) |
Key Features
• Two 30-mΩ (typical) MOSFETs for High Efficiency at 4-A Loads200-kHz to 2-MHz Switching Frequency0.6-V ± 1% Voltage Reference Over Temperature (–40°C to +150°C)Start-up With Prebiased VoltageSynchronizes to External ClockAdjustable Slow Start / SequencingUV and OV Power-Good OutputCycle by Cycle Current Limit and Hiccup Current ProtectionThermally Enhanced 3-mm × 3-mm 16-Pin WQFN (RTE)Pin Compatible to TPS54418Create a Custom Design Using the TPS54478 With theWEBENCH®Power DesignerTwo 30-mΩ (typical) MOSFETs for High Efficiency at 4-A Loads200-kHz to 2-MHz Switching Frequency0.6-V ± 1% Voltage Reference Over Temperature (–40°C to +150°C)Start-up With Prebiased VoltageSynchronizes to External ClockAdjustable Slow Start / SequencingUV and OV Power-Good OutputCycle by Cycle Current Limit and Hiccup Current ProtectionThermally Enhanced 3-mm × 3-mm 16-Pin WQFN (RTE)Pin Compatible to TPS54418Create a Custom Design Using the TPS54478 With theWEBENCH®Power Designer
Description
AI
The TPS54478 device is a full featured 6-V, 4-A, synchronous step down current mode converter with two integrated MOSFETs.
The TPS54478 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.
The TPS54478 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature. Efficiency is maximized through the integrated 30-mΩ MOSFETs and 525-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2.5 µA by entering a shutdown mode.
Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage start-up ramp is controlled by the soft-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection, and thermal shutdown protect the device during an overcurrent condition.
For more SWIFT™ documentation, see the TI website atwww.ti.com/swift.
The TPS54478 device is a full featured 6-V, 4-A, synchronous step down current mode converter with two integrated MOSFETs.
The TPS54478 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.
The TPS54478 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature. Efficiency is maximized through the integrated 30-mΩ MOSFETs and 525-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2.5 µA by entering a shutdown mode.
Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage start-up ramp is controlled by the soft-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection, and thermal shutdown protect the device during an overcurrent condition.
For more SWIFT™ documentation, see the TI website atwww.ti.com/swift.