MAX8878

 

器件号	Replacement	Explanation

说明

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The MAX8877/MAX8878 low-noise, low-dropout linear regulators operate from a 2.5V to 6.5V input and deliver up to 150mA. These devices are pin-compatible with the industry-standard '2982 and offer an improved dropout voltage. Typical output noise is 30µV_RMS, and typical dropout is only 165mV at 150mA. The output voltage is preset to voltages in the range of 1.5V to 5.0V, in 100mV increments.

Designed with an internal P-channel MOSFET pass transistor, the MAX8877/MAX8878 maintain a low 100µA supply current, independent of the load current and dropout voltage. Other features include a 10nA logic-controlled shutdown mode, short-circuit and thermal-shutdown protection, and reverse battery protection. The MAX8878 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown. Both devices come in regular and thin 5-pin SOT23 package.

MAX8877、MAX8878：典型工作电路 放大+

关键特性

• Pin-Compatible with the Industry-Standard '2982
• Low Output Noise: 30µV_RMS
• Low 55mV Dropout at 50mA Output (165mV at 150mA output)
• Low 85µA No-Load Supply Current
• Low 100µA Operating Supply Current (even in dropout)
• Thermal-Overload and Short-Circuit Protection
• Reverse Battery Protection
• Output Current Limit
• Preset Output Voltages (±1.4% Accuracy)
• 10nA Logic-Controlled Shutdown

应用

• 音频系统
• 无绳电话
• 电子规划器
• 手持式仪表(PDA、掌上电脑)
• 调制解调器
• 掌上电脑
• PCMCIA卡
• PCS电话