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TPS5103

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TPS5103

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Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 25 Vin (min) (V) 4.5 Vout (max) (V) 24 Vout (min) (V) 1.2 Control mode Voltage mode Features Enable, Frequency synchronization, Light-load efficiency, Synchronous rectification Duty cycle (max) (%) 100 Iq (typ) (A) 0.0005 Number of phases 1 Operating temperature range (°C) -40 to 85
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 25 Vin (min) (V) 4.5 Vout (max) (V) 24 Vout (min) (V) 1.2 Control mode Voltage mode Features Enable, Frequency synchronization, Light-load efficiency, Synchronous rectification Duty cycle (max) (%) 100 Iq (typ) (A) 0.0005 Number of phases 1 Operating temperature range (°C) -40 to 85
SSOP (DB) 20 56.16 mm² (7.2 mm × 7.8 mm)
  • Step-Down DC-DC Converter
  • Three Operation-Modes
    • Heavy Load:
      • Fixed Frequency PWM
      • Hysteretic (User Selectable)
    • Light Load:
      • Skip Mode
  • 4.5-V to 25-V Input Voltage Range
  • Adjustable Output Voltage Down to 1.2 V
  • 95% Efficiency
  • Standby Control
  • Overcurrent Protection
  • UVLO for Internal 5-V Regulation
  • Low-Standby Current . . . 0.5 mA Typical
  • TA = -40°C to 85°C
  • Step-Down DC-DC Converter
  • Three Operation-Modes
    • Heavy Load:
      • Fixed Frequency PWM
      • Hysteretic (User Selectable)
    • Light Load:
      • Skip Mode
  • 4.5-V to 25-V Input Voltage Range
  • Adjustable Output Voltage Down to 1.2 V
  • 95% Efficiency
  • Standby Control
  • Overcurrent Protection
  • UVLO for Internal 5-V Regulation
  • Low-Standby Current . . . 0.5 mA Typical
  • TA = -40°C to 85°C

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 RT pin 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 r ds(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 RT pin 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 r ds(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.
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* 数据表 Multiple Mode Synchronous DC/DC Controller 数据表 (Rev. A) 2001-5-16

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