TPS40303 Series

3-V to 20-V, 25-A, 300-kHz synchronous buck controller with FSS

Catalog

3-V to 20-V, 25-A, 300-kHz synchronous buck controller with FSS

Part	Topology	Output Phases	Control Features	Frequency - Switching	Supplier Device Package	Number of Outputs	Function	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Duty Cycle (Max) [Max]	Output Configuration	Synchronous Rectifier	Clock Sync	Mounting Type	Package / Case	Output Type
Texas Instruments TPS40303DRCT	Buck	1	Enable Power Good Soft Start	300 kHz	10-VSON (3x3)	1	Step-Down	-40 °C	125 ¯C	3 V	20 V	90 %	Positive			Surface Mount	10-VFDFN Exposed Pad	Transistor Driver
Texas Instruments TPS40303DRCR	Buck	1	Enable Power Good Soft Start	300 kHz	10-VSON (3x3)	1	Step-Down	-40 °C	125 ¯C	3 V	20 V	90 %	Positive			Surface Mount	10-VFDFN Exposed Pad	Transistor Driver

Catalog

3-V to 20-V, 25-A, 300-kHz synchronous buck controller with FSS

Key Features

• Input Voltage Range From 3 V to 20 V300-kHz (TPS40303), 600-kHz (TPS40304), and 1.2-MHz (TPS40305) Switching FrequenciesHigh- and Low-Side FET RDS(on)Current SensingProgrammable Thermally Compensated OCP LevelsProgrammable Soft Start600-mV, 1% 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 PadCreate a Custom Design Using the TPS4030x With theWEBENCH®Power DesignerInput Voltage Range From 3 V to 20 V300-kHz (TPS40303), 600-kHz (TPS40304), and 1.2-MHz (TPS40305) Switching FrequenciesHigh- and Low-Side FET RDS(on)Current SensingProgrammable Thermally Compensated OCP LevelsProgrammable Soft Start600-mV, 1% 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 PadCreate a Custom Design Using the TPS4030x With theWEBENCH®Power Designer

Description

The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from 3-V to 20-V input. 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 300 kHz, 600 kHz, or 1.2 MHz. 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 TPS4030x 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 TPS4030x 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 TPS4030x then enters a shutdown and restart cycle until the fault is removed. The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from 3-V to 20-V input. 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 300 kHz, 600 kHz, or 1.2 MHz. 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 TPS4030x 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 TPS4030x 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 TPS4030x then enters a shutdown and restart cycle until the fault is removed.