• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The TPS51427A 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 TPS51427A 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.

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 R_DS(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
• OOB Function Disabled. Refer to TPS51427 for OOB-Enabled Device
• APPLICATIONS
  • Notebook I/O and System Bus Rails
  • Graphics Application
  • PDAs and Mobile Communication Devices