TPS54283 Series

4.5V to 28V Input, Dual 2A Output, 300kHz Step-Down Converter with Internal Compensation

Catalog

4.5V to 28V Input, Dual 2A Output, 300kHz Step-Down Converter with Internal Compensation

Part	Voltage - Input (Min) [Min]	Mounting Type	Output Type	Voltage - Output (Max)	Topology	Synchronous Rectifier	Number of Outputs	Supplier Device Package	Voltage - Output (Min/Fixed)	Package / Case	Package / Case [y]	Package / Case [x]	Function	Frequency - Switching	Current - Output	Voltage - Input (Max) [Max]	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments TPS54283PWPR	4.5 V	Surface Mount	Adjustable	25.2 V	Buck		2	14-HTSSOP	0.8 V	14-PowerTSSOP	4.4 mm	0.173 in	Step-Down	310 kHz	2 A	28 V	Positive	85 °C	-40 °C
Texas Instruments TPS54283PWP	4.5 V	Surface Mount	Adjustable	25.2 V	Buck		2	14-HTSSOP	0.8 V	14-PowerTSSOP	4.4 mm	0.173 in	Step-Down	310 kHz	2 A	28 V	Positive	85 °C	-40 °C

Catalog

4.5V to 28V Input, Dual 2A Output, 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 Input VoltageOutput Current Up to 2 ATwo Fixed Switching Frequency Versions:TPS54283: 300 kHzTPS54286: 600 kHzTwo 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 Selectable by a Single Pin100-mInternal High-Side MOSFETsCurrent Mode ControlInternal Compensation (See Page 16)Pulse-by-Pulse Overcurrent ProtectionThermal Shutdown Protection at 148°C14-Pin PowerPAD™ HTSSOP packageAPPLICATIONSSet Top BoxDigital TVPower for DSPConsumer ElectronicsPowerPAD Is a trademark of Texas Instruments.All other trademarks are the property of their respective owners.4.5-V to 28-V Input RangeOutput Voltage Range 0.8 V to 90% of Input VoltageOutput Current Up to 2 ATwo Fixed Switching Frequency Versions:TPS54283: 300 kHzTPS54286: 600 kHzTwo 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 Selectable by a Single Pin100-mInternal High-Side MOSFETsCurrent Mode ControlInternal Compensation (See Page 16)Pulse-by-Pulse Overcurrent ProtectionThermal Shutdown Protection at 148°C14-Pin PowerPAD™ HTSSOP packageAPPLICATIONSSet Top BoxDigital TVPower for DSPConsumer ElectronicsPowerPAD Is a trademark of Texas Instruments.All other trademarks are the property of their respective owners.

Description

TPS54283 and TPS54286 are dual output non-synchronous buck converters capable of supporting 2-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 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 3 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 not needing the full load capability of both outputs. The outputs may be enabled independently, or may be configured to allow either ratiometric or sequential startup sequencing. Additionally, the two outputs may also be powered from different sources. TPS54283 and TPS54286 are dual output non-synchronous buck converters capable of supporting 2-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 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 3 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 not needing the full load capability of both outputs. The outputs may be enabled independently, or may be configured to allow either ratiometric or sequential startup sequencing. Additionally, the two outputs may also be powered from different sources.