描述 Description

The AAT2603 is a highly integrated power management solution for handheld mobile systems. It provides six regulated voltages from a single-cell Lithium-ion/polymer battery or a 5V supply.
The six outputs are produced by six regulators; two switching step-down regulators and four low-dropout (LDO) regulators. Each voltage regulator has its own independent enable pin.
The high efficiency step-down regulators are fully integrated and switch at a high 1.5 MHz fixed frequency. They automatically transition to variable frequency operation at light loads for improved efficiency. DC-DC1 (Buck1) is designed for high output current and low dropout voltage (200mV at 1.2A). DC-DC2 (Buck2) is a 600mA regulator with a two step dynamic output voltage capability. One option allows the output voltage of DC-DC2 (Buck2) to be set to either 1.0V or 1.3V with the SELB2 logic pin.
LDO regulators LDO1 and LDO2 can supply up to 400mA of load current with output voltages adjustable down to 1.5V. LDO regulators LDO3 and LDO4 can supply up to 200mA of current and provide good noise and power supply rejection. LDO3 and LDO4 have output voltages externally adjustable down to 1.2V.
The AAT2603 is available in a Pb-free thermally enhanced 28-pin TQFN44 package and is rated for operation over the -40°C to +85°C temperature range.

特性 Features

·VIN Range: 2.7V to 5.5V
·Two Step-Down Regulators
·DC-DC1(Buck1): 1.2A, Low Dropout Voltage
·Externally Adjustable: VFBB1 = 0.6V
·VOUT Range: 0.6V to VINB1
·Fixed: VOUT = 3.3V?
·Factory Programmable to any Two Voltage Levels from 0.6V to 4.0V
·DC-DC2(Buck2): 0.6A, Low Dropout Voltage
·Externally Adjustable: VFBB2 = 0.6V
·VOUT Range: 0.6V to VINB2
·Fixed: VOUT = 1.0V[SELB2=’0’]/1.3V[SELB2=’1’]
·Factory Programmable to any Two Voltage Levels from 0.6V to 4.0V
·Fixed 1.5MHz Switching Frequency
·Internally Compensated Current Mode Control
·High Efficiency over the Entire Load Range
·Four LDO Regulators
·LDO1: 400mA LDO
·LDO2: 400mA LDO
·LDO3: 200mA, Low Noise LDO
·LDO4: 200mA, Low Noise LDO
·Fast Turn-On and Turn-Off time
·Short Circuit and Over-Current Protection
·Over-Temperature Protection
·Temperature Range: -40°C to +85°C
·TQFN44-28 Package

簡介

AAT2603屬于集成電路（IC）的電源管理-專用。由制造生產(chǎn)的AAT2603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)、負載突降保護、觸覺驅(qū)動器、熱電制冷器控制等。