AAT4621中文資料PC Card Current Limit Interface and Capacitor Charger數(shù)據(jù)手冊Skyworks規(guī)格書

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

簡介

AAT4621屬于集成電路（IC）的電源管理-專用。由Skyworks制造生產(chǎn)的AAT4621電源管理 - 專用專用型電源管理集成電路 (PMIC) 用于電源的控制或操作，適合特定或小范圍的目標(biāo)應(yīng)用，例如汽車氣囊管理、電容器組平衡、AC 公共電力監(jiān)控、存儲器總線端接、接地故障檢測、能量收集、小型引擎管理、處理器或芯片集專用電壓調(diào)節(jié)、負(fù)載突降保護(hù)、觸覺驅(qū)動器、熱電制冷器控制等。