MAX1799 - CDMA蜂窝电话/PCS电话系统电源

MAX1799是Maxim美信半导体公司的一款线性调节器产品，MAX1799是CDMA蜂窝电话/PCS电话系统电源，本站介绍了MAX1799的封装应用图解、特点和优点、功能等，并给出了与MAX1799相关的Maxim元器件型号供参考。

MAX1799 - CDMA蜂窝电话/PCS电话系统电源 - 线性调节器 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

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.

关键特性

以下关键特性由Maxim美信半导体提供：

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

热门应用

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

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