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TPS51220A-Q1

ACTIVE

3-V to 28-V, synchronous peak current mode automotive buck controller in RSN/RTV package

TPS51220A-Q1

ACTIVE

Product details

Vin (min) (V) 4.5 Vin (max) (V) 32 Vout (min) (V) 1 Vout (max) (V) 12 Iout (max) (A) 20 Iq (typ) (mA) 0.007 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Light Load Efficiency, Phase Interleaving, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 4 Number of phases 1 Rating Automotive Control mode D-CAP, current mode Type Controller
Vin (min) (V) 4.5 Vin (max) (V) 32 Vout (min) (V) 1 Vout (max) (V) 12 Iout (max) (A) 20 Iq (typ) (mA) 0.007 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Light Load Efficiency, Phase Interleaving, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 4 Number of phases 1 Rating Automotive Control mode D-CAP, current mode Type Controller
WQFN (RTV) 32 25 mm² 5 x 5
  • 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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* Data sheet Fixed Frequency 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller datasheet 21 Feb 2011

Design & development

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Evaluation board

TPS51220AEVM-476 — High Performance Dual Output Synchronous Buck Evaluation Module using the 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 (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS51220A Unencrypted PSpice Transient Model Package (Rev. B)

SLIM156B.ZIP (57 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
WQFN (RTV) 32 View options

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