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TPS51427-用于笔记本电脑电源轨的 D-CAP+? 模式双路同步降压控制器
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TI产品 - TPS51427介绍
TPS51427 - 用于笔记本电脑电源轨的 D-CAP+? 模式双路同步降压控制器

TPS51427是TI公司的一款控制器(外部开关)产品,TPS51427是用于笔记本电脑电源轨的 D-CAP+? 模式双路同步降压控制器,本页介绍了TPS51427的产品说明、应用、特性等,并给出了与TPS51427相关的TI元器件型号供参考。

TPS51427 - 用于笔记本电脑电源轨的 D-CAP+? 模式双路同步降压控制器 - 控制器(外部开关) - DC/DC开关稳压器 - TI公司(Texas Instruments,德州仪器)

产品描述

The TPS51427 is a dual synchronous step-down controller designed for notebook and mobile communications applications. This device is part of a low-cost suite of notebook power bus regulators that enables system designs with low external component counts. The TPS51427 includes two pulse-width-modulation (PWM) controllers, SMPS1 and SMPS2. The output of SMPS1 can be adjusted from 0.7 V to 5.9 V, while the output of SMPS2 can be adjusted from 0.5 V to 2.5 V. This device also features a low-dropout (LDO) regulator that provides a 5-V/3.3-V output, or adjustable from 0.7-V to 4.5-V output via LDOREFIN. The fixed-frequency emulated adaptive on-time control supports seamless operation between PWM mode under heavy load conditions and reduced frequency operation at light loads for high-efficiency down to the milliampere range. An integrated boost switch enhances the high-side MOSFET to further improve efficiency. The main control loop is the D-CAP™ mode that is optimized for low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP. Advanced ramp compensation minimizes jitter without degrading line and load regulation. RDS(on) current sensing methods offers maximum cost saving.

The TPS51427 supports supply input voltages that range from 5.5 V to 28 V. It is available in the 32-pin, 5-mm × 5-mm QFN package (Green, RoHs- compliant, and Pb-free). The device is specified from -40°C to +85°C.

产品特性

  • Fixed-Frequency Emulated On-Time Control; Frequency Selectable from Three Options
  • D-CAP™ Mode Enables Fast Transient Response Less than 100 ns
  • Advanced Ramp Compensation Allows Low Output Ripple with Minimal Jitter
  • Selectable PWM-Only/OOA/Auto-Skip Modes
  • Wide Input Voltage Range: 5.5 V to 28 V
  • Dual Fixed or Adjustable SMPS:
    • 0.7 V to 5.9 V (Channel1)
    • 0.5 V to 2.5 V (Channel2)
  • Fixed 3.3-V/5-V, or Adjustable Output 0.7-V to 4.5-V LDO; Capable of Sourcing 100 mA
  • Fixed 3.3-VREF Output Capable of Sourcing 10 mA
  • Temperature Compensated Low-Side RDS(on) Current Sensing
  • Adaptive Gate Drivers with Integrated Boost Switch
  • Bootstrap Charge Auto Refresh
  • Integrated Soft Start, Tracking Soft Stop
  • Independent PGOOD and EN for Each Channel
  • APPLICATIONS
    • Notebook I/O and System Bus Rails
    • Graphics Application
    • PDAs and Mobile Communication Devices

D-CAP, OOA are trademarks of Texas Instruments All other trademarks are the property of their respective owners

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