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TPS51220A-Q1

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Controlador buck sincrónico automot. 3 V a 28 V, modo de corriente pico máxima, encapsulado RSN/RTV

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TPS51220A-Q1

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Detalles del producto

Rating Automotive Topology Buck Iout (max) (A) 20 Vin (max) (V) 32 Vin (min) (V) 4.5 Vout (max) (V) 12 Vout (min) (V) 1 Control mode D-CAP, current mode Features Enable, Frequency synchronization, Light-load efficiency, Phase Interleaving, Power good, Synchronous rectification Duty cycle (max) (%) 99 Iq (typ) (A) 0.000007 Number of phases 1 Operating temperature range (°C) -40 to 85
Rating Automotive Topology Buck Iout (max) (A) 20 Vin (max) (V) 32 Vin (min) (V) 4.5 Vout (max) (V) 12 Vout (min) (V) 1 Control mode D-CAP, current mode Features Enable, Frequency synchronization, Light-load efficiency, Phase Interleaving, Power good, Synchronous rectification Duty cycle (max) (%) 99 Iq (typ) (A) 0.000007 Number of phases 1 Operating temperature range (°C) -40 to 85
WQFN (RTV) 32 25 mm² (5 mm × 5 mm)
  • Qualified for Automotive Applications
  • Input Voltage Range: 4.5 V to 32 V
  • Output Voltage Range: 1 V to 12 V
  • Selectable Light Load Operation
    (Continuous / Auto Skip / Out-Of-Audio Skip)
  • Programmable Droop Compensation
  • Voltage Servo Adjustable Soft Start
  • 200-kHz to 1-MHz Fixed-Frequency PWM
  • Selectable Current/D-CAP Mode Architecture
  • 180° Phase Shift Between Channels
  • Resistor or Inductor DCR Current Sensing
  • Adaptive Zero Crossing Circuit
  • Powergood Output for Each Channel
  • OCL/OVP/UVP/UVLO Protections
    (OVP Disable Option)
  • Thermal Shutdown (Non-Latch)
  • Output Discharge Function (Disable Option)
  • Latch-Up exceeds 100mA per JESD78- Class I
  • Integrated Boot Strap MOSFET Switch
  • QFN-32 (RTV) Package
  • APPLICATIONS
    • I/O Bus
    • Point of Load in LCD TV, MFP
  • Qualified for Automotive Applications
  • Input Voltage Range: 4.5 V to 32 V
  • Output Voltage Range: 1 V to 12 V
  • Selectable Light Load Operation
    (Continuous / Auto Skip / Out-Of-Audio Skip)
  • Programmable Droop Compensation
  • Voltage Servo Adjustable Soft Start
  • 200-kHz to 1-MHz Fixed-Frequency PWM
  • Selectable Current/D-CAP Mode Architecture
  • 180° Phase Shift Between Channels
  • Resistor or Inductor DCR Current Sensing
  • Adaptive Zero Crossing Circuit
  • Powergood Output for Each Channel
  • OCL/OVP/UVP/UVLO Protections
    (OVP Disable Option)
  • Thermal Shutdown (Non-Latch)
  • Output Discharge Function (Disable Option)
  • Latch-Up exceeds 100mA per JESD78- Class I
  • Integrated Boot Strap MOSFET Switch
  • QFN-32 (RTV) Package
  • APPLICATIONS
    • I/O Bus
    • Point of Load in LCD TV, MFP

The TPS51220A-Q1 is a dual synchronous buck regulator controller with two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51220A-Q1 supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (99%) operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1 MHz by a resistor, and each channel runs 180° out-of-phase. The TPS51220A-Q1 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220A-Q1 is available in the 32-pin 5×5/4×4 QFN package and is specified from –40°C to 105°C.

The TPS51220A-Q1 is a dual synchronous buck regulator controller with two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51220A-Q1 supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (99%) operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1 MHz by a resistor, and each channel runs 180° out-of-phase. The TPS51220A-Q1 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220A-Q1 is available in the 32-pin 5×5/4×4 QFN package and is specified from –40°C to 105°C.
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* Hoja de datos Fixed Frequency 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller datasheet 21/02/2011

Diseño y desarrollo

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Placa de evaluación

TPS51220AEVM-476 — Módulo de evaluación de reductor síncrono de doble salida y alto rendimiento con TPS51220A

This EVM utilizes TI’s TPS51220A in a dual output design. It includes many test points to help the engineer monitor and evaluate the control characteristics of the TPS51220A. The TPS51220A is a dual peak current mode synchronous buck controller with three linear regulators. The EVM also allows the (...)
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Modelo de simulación

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