MAX1799

CDMA蜂窝电话/PCS电话系统电源


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说明

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.
MAX1798、MAX1799:典型工作电路 MAX1798、MAX1799:典型工作电路 放大+

关键特性

  • 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

  • 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
Part NumberRegulatorsVIN
(V)
VIN
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
Rated ILOAD
(mA)
ICC
(µA)
Output Voltage Noise
(µV RMS)
Ref. BypassLow Batt./ Pwr. Fail OutPOK/Reset Thresh.
(V)
WatchdogReverse Batt. Protect.Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtypmaxtypnomSee Notes
MAX1799 52.55.51.83.30.1230030068045YesNo
Vout-13%
Vout-7.5%
NoNo-40 to +85
QFN/20
TQFN/20
$2.04 @1k
查看所有Linear Regulators (146)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

质量和环境数据

申请可靠性报告: MAX1799 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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