AAT4621中文资料PC Card Current Limit Interface and Capacitor Charger数据手册Skyworks规格书

描述 Description

The AAT4621 SmartSwitch™ is a reverse-blocking, current limited P-channel MOSFET power switch designed for high side load-switching applications in WiMAX, CDMA or GSM/GPRS/3G modem cards. Examples are PC Card, Express Cards, Compact Flash cards. Used in conjunction with a super capacitor, and featuring dual current limits, the AAT4621 will ensure that the power rating of the host supply is not exceeded at any time. The current limit is set by two external resistors allowing a ±10% current limit accuracy over the normal operating temperature range. The switch can be controlled from either of the two enable inputs and in the off condition will block currents in both directions. The AAT4621 also incorporates a System READY function which can advise the system that the super capacitor is fully charged and ready for use. Adjustable hysteresis is provided with the addition of an external resistor. The quiescent supply current is typically a low 40µA. In shutdown mode, the supply current decreases to less than 1µA.
The AAT4621 is available in a thermally enhanced, Pb-free, 14-pin TDFN33 package and is specified over the -40°C to 85°C temperature range.

特性 Features

·VIN Range: 3.0V to 5.5V
·Dual Independent Current Limits
·75mA to 1200mA
·±10% Current Accuracy
·20°C Temperature Band
·Reverse Current Blocking Protection
·Power Loop
·Low Quiescent Current
·40µA Typical
·1.0µA Max with Switch Off
·65mΩ Typical RDS(ON) at 3V
·Only 1.4V Needed for Enable Control Pin
·System READY Output with Externally Programmable Hysteresis
·Under-Voltage Lockout
·Temperature Range: -40 to 85°C
·14-Pin TDFN33 Package

简介

AAT4621属于集成电路（IC）的电源管理-专用。由Skyworks制造生产的AAT4621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。