TPS5403 Series
4.5V to 28V Input, 3.3V, 1.7A Output, Non-Synchronous Step-Down Regulator with Integrated MOSFET
Manufacturer: Texas Instruments
Catalog(1 parts)
| Part | Output Configuration | Voltage - Output (Min/Fixed)▲▼ | Output Type▲▼ | Voltage - Input (Max)▲▼ | Package / Case▲▼ | Package / Case | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Current - Output▲▼ | Voltage - Input (Min)▲▼ | Mounting Type | Topology | Supplier Device Package | Function | Synchronous Rectifier▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Number of Outputs▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS5403DRBuck Switching Regulator IC Positive Fixed 3.3V 1 Output 1.7A 8-SOIC (0.154", 3.90mm Width) | Positive | 3.299999952316284 V | 27.030000686645508 °C/W | 28 V | 0.003899999894201755 m | 8-SOIC | 1100000 Hz | 50000 Hz | 1.7000000476837158 A | 4.5 V | Surface Mount | Buck | 8-SOIC | Step-Down | 85 °C | -40 °C | 1 ul |
Key Features
• Fixed 3.3-V Output4.5-V to 28-V Wide Input Voltage RangeUp to 1.7-A Maximum Continuous Output Loading CurrentPulse Skipping Mode to Achieve High Light Load EfficiencyOver 80% Efficiency at 10-mA LoadingAdjustable 50-kHz to 1.1-MHz Switching Frequency Set by an External Resistor(Leave pin ROSC floating. Set frequency to 120 kHz and ground connection to 70 kHz)Peak Current-Mode ControlCycle-by-Cycle Over Current ProtectionFrequency Spread Spectrum and Switching Node Anti-Ringing to Ease EMI IssueExternal Soft StartAvailable in SOIC8 PackageFixed 3.3-V Output4.5-V to 28-V Wide Input Voltage RangeUp to 1.7-A Maximum Continuous Output Loading CurrentPulse Skipping Mode to Achieve High Light Load EfficiencyOver 80% Efficiency at 10-mA LoadingAdjustable 50-kHz to 1.1-MHz Switching Frequency Set by an External Resistor(Leave pin ROSC floating. Set frequency to 120 kHz and ground connection to 70 kHz)Peak Current-Mode ControlCycle-by-Cycle Over Current ProtectionFrequency Spread Spectrum and Switching Node Anti-Ringing to Ease EMI IssueExternal Soft StartAvailable in SOIC8 Package
Description
AI
The TPS5403 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 4.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.
TPS5403 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.
The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.
LX anti-ringing is added to address high frequency EMI issues.
A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.
The TPS5403 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 4.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.
TPS5403 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.
The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.
LX anti-ringing is added to address high frequency EMI issues.
A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.