MAX1798中文资料CDMA蜂窝电话/PCS电话系统电源数据手册ADI规格书

描述 Description

The MAX1798/MAX1798A/MAX1799/MAX1799A system power supplies are designed specifically for CDMA cellular/PCS handsets. Each device contains five low-dropout linear regulators (LDOs), a 140ms (min) reset timer, a serial interface, push-on/push-off control logic, and two general-purpose open-drain outputs. Only the serial interface is different between the MAX1798/MAX1798A/MAX1799/MAX1799A: the MAX1798/MAX1798A feature an SPI™-compatible serial interface, and the MAX1799/MAX1799A feature an I²C-compatible interface. The \"A\" parts have a -13% reset threshold, the non-A parts have a 9.5% threshold. The \"A\" parts have a 175 delay on a reset-triggered shutdown, the non-A shutdown instantly.
Each linear regulator features extremely low dropout voltage, specified at two-thirds of the maximum output current. LDO1 is rated for 300mA, while LDOs 2–5 are each rated for 150mA. All LDOs are optimized for low noise and isolation. Each LDO can be individually enabled and disabled through the serial port, as well as individually programmed to any of 32 voltages from 1.8V to 3.3V.
The MAX1798/MAX1798A/MAX1799/MAX1799As' wide 2.5V to 5.5V input voltage range makes them compatible with a wide range of input supplies, including a single Li+ cell battery. Both devices are available in thermally enhanced 20-pin TSSOP and TQFN exposed pad (EP) packages. Evaluation kits (MAX1798EVKIT and MAX1799EVKIT) are available to facilitate designs.

特性 Features

• One 300mA Low-Noise LDO
• Four 150mA Low-Noise LDOs
• 45µVRMS Noise from 10Hz to 100kHz
• > 60dB Crosstalk Isolation Below 10kHz
• > 60dB PSRR Below 10kHz
• 125mV (max) Dropout (OUT1 at 200mA)
• 100mV (max) Dropout (OUT2–5 at 100mA)
• Programmable Output Voltages
• 1.8V to 3.3V in 32 Steps
• 140ms (min) Reset Timer
• SPI- or I²C-Compatible Serial Interface
• Push-On/Push-Off Control Logic
• Two 150mA General-Purpose Open-Drain Outputs
• Overcurrent and Thermal Protection (all LDOs)
• 1µA Shutdown Current
• 20-Pin Thermally-Enhanced TSSOP or TQFN Packages

应用 Application

• 2节或3节NiMH、NiCd或碱性电池供电系统
• CDMA蜂窝/PCS手机
• 手持终端
• 掌上电脑
• PDA
• 单节Li+电池供电系统

简介

MAX1798属于集成电路（IC）的电源管理-专用。由制造生产的MAX1798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。