描述 Description

The AAT2215 SwitchReg? is a high current, synchronous step-up converter with a programmable peak NMOS current limit. It is ideal to prevent the input current from overloading the system power in PC Card GSM/GPRS/3G and WiMax modem card applications. The AAT2215's internal compensation is optimized for the large bulk tantalum output capacitors needed to support the output voltage during large load pulses.
The output voltage may be programmed from 3.0V to 5.5V by external resistor divider. Light load switching frequency modulation and low quiescent current maintain high efficiency performance for light load mode conditions.
Two current limits are designed into the AAT2215. One is the low-side power MOSFET programmable peak current limit, which works when the device is in step-up regulation state. An external resistor is used to program the current limit from 600mA to 4.0A. The other is the highside current limit, which operates in a linear mode to limit inrush current to 750mA when the output charges up to the input voltage. The AAT2215 includes internal over-voltage protection and a system ready signal.
The AAT2215 is available in a Pb-free, 3mm x 3mm, 12-pin TDFN package (TDFN33-12) rated from -40°C to +85°C.

特性 Features

·2.4V to VOUT + 0.25V Input Voltage Range
·Adjustable 3.0V to 5.5V Output Voltage
·Internal Compensation
·600kHz Switching Frequency
·Programmable Peak NMOS Current Limit (0.6A to 4.0A)
·Synchronous P-Channel MOSFET
·True Load Disconnect in Shutdown
·Reverse Current Block When Enabled
·Start-Up Inrush Current Limit (0.75A) and Overload Current Limit (3A)
·Up to 95% Efficiency
·Active-Low Power Ready Indicator (RDY)
·Very Low 55μA No-Load Operating Current
·Less than 1μA Shutdown Current
·6V Output Over-Voltage Protection (OVP)
·Thermal Shutdown Protection (TSHDN)
·Short Circuit Protection
·Low-Profile TDFN33-12 Package

簡介

AAT2215屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由制造生產(chǎn)的AAT2215穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。