MAX8663集成电路（IC）的电源管理-专用规格书PDF中文资料

General Description

The MAX8662/MAX8663 power-management ICs (PMICs) are efficient, compact devices suitable for smart cellular phones, PDAs, Internet appliances, and other portable devices. They integrate two synchronous buck regulators, a boost regulator driving two to seven white LEDs, four low-dropout linear regulators (LDOs), and a linear charger for a single-cell Li-ion (Li+) battery.

Maxim’s Smart Power Selector™ (SPS) safely distributes power between an external power source (AC adapter, auto adapter, or USB source), battery, and the system load. When system load peaks exceed the external source capability, the battery supplies supple mental current. When system load requirements are small, residual power from the external power source charges the battery. A thermal-limiting circuit limits battery-charge rate and external power-source current to prevent overheating. The PMIC also allows the system to operate with no battery or a discharged battery.

The MAX8662 is available in a 6mm x 6mm, 48-pin TQFN package, while the MAX8663, without the LED driver, is available in a 5mm x 5mm, 40-pin TQFN package.

特性 Features

♦ Two 95-Efficient 1MHz Buck Regulators

   Main Regulator: 0.98V to VIN at 1200mA

   Core Regulator: 0.98V to VIN at 900mA

♦ 1MHz Boost WLED Driver

   Drives Up to 7 White LEDs at 30mA (max)

   PWM and Analog Dimming Control

♦ Four Low-Dropout Linear Regulators

   1.7V to 5.5V Input Range

   15µA Quiescent Current

♦ Single-Cell Li+ Charger

   Adapter or USB Input

   Thermal-Overload Protection

♦ Smart Power Selector (SPS)

   AC Adapter/USB or Battery Source

   Charger-Current and System-Load Sharing

Applications

   Smart Phones and PDAs

   MP3 and Portable Media Players

   Palmtop and Wireless Handhelds