TPS54383 Series

4.5V to 28V Input, Dual 3A Outputs, 300kHz Step-Down Converter with Internal Compensation

Catalog

4.5V to 28V Input, Dual 3A Outputs, 300kHz Step-Down Converter with Internal Compensation

Part	Voltage - Input (Min) [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Current - Output	Topology	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Frequency - Switching	Output Configuration	Function	Supplier Device Package	Number of Outputs	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Output (Max)	Output Type
Texas Instruments TPS54383PWP	4.5 V	-40 °C	125 ¯C	Surface Mount	3 A	Buck	28 V	0.8 V	310 kHz	Positive	Step-Down	14-HTSSOP	2	14-PowerTSSOP	4.4 mm	0.173 in	25.2 V	Adjustable
Texas Instruments TPS54383PWPRG4	4.5 V	-40 °C	125 ¯C	Surface Mount	3 A	Buck	28 V	0.8 V	310 kHz	Positive	Step-Down	14-HTSSOP	2	14-PowerTSSOP	4.4 mm	0.173 in	25.2 V	Adjustable
Texas Instruments TPS54383PWPR	4.5 V	-40 °C	125 ¯C	Surface Mount	3 A	Buck	28 V	0.8 V	310 kHz	Positive	Step-Down	14-HTSSOP	2	14-PowerTSSOP	4.4 mm	0.173 in	25.2 V	Adjustable

Catalog

4.5V to 28V Input, Dual 3A Outputs, 300kHz Step-Down Converter with Internal Compensation

Key Features

• 4.5-V to 28-V Input RangeOutput Voltage Range 0.8 V to 90% of InputVoltageOutput Current Up to 3 ATwo Fixed Switching Frequency Versions:TPS54383: 300 kHzTPS54386: 600 kHzThree Selectable Levels of Overcurrent Protection(Output 2)0.8-V 1.5% Voltage Reference2.1-ms Internal Soft-StartDual PWM Outputs 180° Out-of-PhaseRatiometric or Sequential Startup Modes Selectableby a Single Pin85-mΩ Internal High-Side MOSFETsCurrent Mode ControlInternal CompensationPulse-by-Pulse Overcurrent ProtectionThermal Shutdown Protection at +148\xC2°C14-Pin PowerPAD™ HTSSOP package4.5-V to 28-V Input RangeOutput Voltage Range 0.8 V to 90% of InputVoltageOutput Current Up to 3 ATwo Fixed Switching Frequency Versions:TPS54383: 300 kHzTPS54386: 600 kHzThree Selectable Levels of Overcurrent Protection(Output 2)0.8-V 1.5% Voltage Reference2.1-ms Internal Soft-StartDual PWM Outputs 180° Out-of-PhaseRatiometric or Sequential Startup Modes Selectableby a Single Pin85-mΩ Internal High-Side MOSFETsCurrent Mode ControlInternal CompensationPulse-by-Pulse Overcurrent ProtectionThermal Shutdown Protection at +148\xC2°C14-Pin PowerPAD™ HTSSOP package

Description

The TPS54383 and TPS54386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage. With an internally-determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs. The outputs may be enabled independently, or may be configured to allow either ratio-metric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources. The TPS54383 and TPS54386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage. With an internally-determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs. The outputs may be enabled independently, or may be configured to allow either ratio-metric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources.