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AC/DC & DC/DC controllers (external FET)

TPS5103

現行

具有三種運作模式的 4.5-V 至 25-V 同步降壓控制器

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TPS51397A 現行 4.5-V 至 24-V 輸入、10-A 同步降壓穩壓器 Offers a lower IQ with light-load efficiency and an extended positive operating temperature in a smaller package.

TPS5103

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 4.5 Vin (max) (V) 25 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Rating Catalog Vout (min) (V) 1.2 Vout (max) (V) 24 Iq (typ) (A) 0.0005 Duty cycle (max) (%) 100
Vin (min) (V) 4.5 Vin (max) (V) 25 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Rating Catalog Vout (min) (V) 1.2 Vout (max) (V) 24 Iq (typ) (A) 0.0005 Duty cycle (max) (%) 100
SSOP (DB) 20 56.16 mm² 7.2 x 7.8
  • 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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* Data sheet Multiple Mode Synchronous DC/DC Controller datasheet (Rev. A) 2001年 5月 16日

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