TPS40345 Series
3-V to 20-V, 25-A, synchronous buck controller for cost-optimized applications
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Main Purpose | Current - Output▲▼ | Voltage - Input▲▼ | Voltage - Input▲▼ | Outputs and Type | Outputs and Type▲▼ | Supplied Contents | Frequency - Switching▲▼ | Voltage - Output▲▼ | Utilized IC / Part | Board Type | Topology | Package / Case | Control Features | Synchronous Rectifier▲▼ | Number of Outputs▲▼ | Output Phases▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Supplier Device Package | Function | Duty Cycle (Max)▲▼ | Mounting Type | Operating Temperature▲▼ | Operating Temperature▲▼ | Output Configuration | Clock Sync▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS40345EVM-353TPS40345 - DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board | DC/DC, Step Down | 20 A | 8 V | 14 V | Non-Isolated | 1 ul | Board(s) | 600000 Hz | 1.2000000476837158 V | TPS40345 | Fully Populated | ||||||||||||||||
Texas Instruments TPS40345DRCTBuck Regulator Positive Output Step-Down DC-DC Controller IC 10-VSON (3x3) | 600000 Hz | Buck | 10-VFDFN Exposed Pad | Enable, Power Good, Soft Start | 1 ul | 1 ul | 20 V | 3 V | 10-VSON (3x3) | Step-Down | 0.8999999761581421 ul | Surface Mount | 85 °C | -20 °C | Positive |
Key Features
• Input Voltage Range From 3 V to 20 V600-kHz Switching FrequencyHigh- and Low-Side FET RDS(on)Current SensingProgrammable Thermally Compensated OCP LevelsProgrammable Soft-Start600-mV, 1.3% Reference VoltageVoltage Feed-Forward CompensationSupports Prebiased OutputFrequency Spread SpectrumThermal Shutdown Protection at 145°C10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal PadInput Voltage Range From 3 V to 20 V600-kHz Switching FrequencyHigh- and Low-Side FET RDS(on)Current SensingProgrammable Thermally Compensated OCP LevelsProgrammable Soft-Start600-mV, 1.3% Reference VoltageVoltage Feed-Forward CompensationSupports Prebiased OutputFrequency Spread SpectrumThermal Shutdown Protection at 145°C10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad
Description
AI
The TPS40345 is a synchronous buck controller that operates from 3-V to 20-V input and which can be used in cost-optimized applications. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 600 kHz.
The frequency spread spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.
The TPS40345 offers design with a variety of user-programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.
OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS40345 enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40345 then enters a shutdown and restart cycle until the fault is removed.
The TPS40345 is a synchronous buck controller that operates from 3-V to 20-V input and which can be used in cost-optimized applications. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 600 kHz.
The frequency spread spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.
The TPS40345 offers design with a variety of user-programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.
OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS40345 enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40345 then enters a shutdown and restart cycle until the fault is removed.