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德州仪器公司的一款控制器（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，本站介绍了TPS51427的封装应用图解、特点和优点、功能等，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 - 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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