TPS5103 Series

4.5-V to 25-V, synchronous buck controller with three operating modes

Catalog

4.5-V to 25-V, synchronous buck controller with three operating modes

Part	Frequency - Switching	Number of Outputs	Output Configuration	Topology	Clock Sync	Package / Case	Supplier Device Package	Mounting Type	Output Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Function	Synchronous Rectifier	Output Phases
Texas Instruments TPS5103IDBR	200 kHz	1	Positive	Buck		20-SSOP	20-SSOP	Surface Mount	Transistor Driver	25 V	4.5 V	Current Limit Frequency Control Soft Start	85 °C	-40 °C	Step-Down		1

Catalog

4.5-V to 25-V, synchronous buck controller with three operating modes

Key Features

• Step-Down DC-DC ConverterThree Operation-ModesHeavy Load:Fixed Frequency PWMHysteretic (User Selectable)Light Load:Skip Mode4.5-V to 25-V Input Voltage RangeAdjustable Output Voltage Down to 1.2 V95% EfficiencyStandby ControlOvercurrent ProtectionUVLO for Internal 5-V RegulationLow-Standby Current . . . 0.5 mA TypicalTA= -40°C to 85°CStep-Down DC-DC ConverterThree Operation-ModesHeavy Load:Fixed Frequency PWMHysteretic (User Selectable)Light Load:Skip Mode4.5-V to 25-V Input Voltage RangeAdjustable Output Voltage Down to 1.2 V95% EfficiencyStandby ControlOvercurrent ProtectionUVLO for Internal 5-V RegulationLow-Standby Current . . . 0.5 mA TypicalTA= -40°C to 85°C

Description

The TPS5103 is a synchronous buck dc/dc controller, designed for notebook PC system power. The controller has three user-selectable operation modes available: hysteretic mode, fixed-frequency PWM control, or SKIP control. In high-current applications, where fast transient response is advantageous for reducing bulk capacitance, the hysteretic mode is selected by connecting the RTpin to VREF5. Selecting the PWM/SKIP modes for less demanding transient applications is ideal for conserving notebook battery life under light load conditions. The device includes high-side and low-side MOSFET drivers capable of driving low rds(on)N-channel MOSFETs. The user-selectable overcurrent protection (OCP) threshold is set by an external TRIP-pin resistor in order to protect the system. The TPS5103 is configured so that a current-sense resistor is not required, improving the operating efficiency. The TPS5103 is a synchronous buck dc/dc controller, designed for notebook PC system power. The controller has three user-selectable operation modes available: hysteretic mode, fixed-frequency PWM control, or SKIP control. In high-current applications, where fast transient response is advantageous for reducing bulk capacitance, the hysteretic mode is selected by connecting the RTpin to VREF5. Selecting the PWM/SKIP modes for less demanding transient applications is ideal for conserving notebook battery life under light load conditions. The device includes high-side and low-side MOSFET drivers capable of driving low rds(on)N-channel MOSFETs. The user-selectable overcurrent protection (OCP) threshold is set by an external TRIP-pin resistor in order to protect the system. The TPS5103 is configured so that a current-sense resistor is not required, improving the operating efficiency.