TPS2151中文资料2-ch, 0.6A loading, 5V, 40mΩ USB power switch, active-high + adjustable output LDO数据手册TI规格书

描述 Description

The TPS2140/41/50/51 is a USB 1.0 and 2.0 Specification-compatible IC containing a dual-current-limiting power switch and an adjustable low dropout regulator (LDO). Both the switch and LDO limit inrush current by controlling the turnon slew rate. The unique dual-current-limiting feature of the switch allows USB peripherals to utilize high-value capacitance at the output of the switch, while keeping the inrush current low. During turn on, the switch limits the current delivered to the capacitive load to less than 100 mA. When the output voltage from the switch reaches about 93% of the input voltage, the switch power good output goes high, and the switch current limit increases to 800mA (minimum), at which point higher current loads can be turned on. The higher current limit provides short circuit protection while allowing the peripheral to draw maximum current from the USB bus.

The switch and LDO function independently, providing flexibility in DSP applications requiring separate core and I/O voltages. For example, in a DSP application operating from a 3.3-V rail, the LDO can supply the DSP core voltage down to 0.9 V, while the switch powers the 3.3-V (typical) DSP I/O supply. If supply sequencing is required, the LDO power good output can be used to enable the switch.

特性 Features

• Complete Power Management Solution for USB High-Power Peripherals
• LDO Supports 2.7 V to 5.5 V VIN and 0.9 V to 3.3 V Adjustable VOUT
• Undervoltage Lockout and Power Good for LDO and Switch
• 85 µA (Typ) Supply Current
• Available in 14-Pin HTSSOP (PowerPAD™)
• Alternative to TPS2148/58 3.3-V LDO With 3.3-V Switch and 5-V Switch
• High-Power USB™ Peripherals
• Digital Still and PC Cameras
• Speakers
• DSP Sequencing

PowerPAD is a trademark of Texas Instruments. USB is a trademark of Universal Serial Bus Association.

简介

TPS2151属于集成电路（IC）的电源管理-专用。由TI制造生产的TPS2151电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。