TPS51427A - 带外 (OOB) 功能已禁用的、用于笔记本电脑电源的 D-CAP+? 模式双路同步降压控制器

TPS51427A是TI德州仪器公司的一款控制器（外部开关）产品，TPS51427A是带外 (OOB) 功能已禁用的、用于笔记本电脑电源的 D-CAP+? 模式双路同步降压控制器，本站介绍了TPS51427A的封装应用图解、特点和优点、功能等，并给出了与TPS51427A相关的TI元器件型号供参考。

TPS51427A - 带外 (OOB) 功能已禁用的、用于笔记本电脑电源的 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 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. 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 TPS51427A 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
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

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

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