ADP3605AR

ADP3605AR Specifications:

• Function: 120 mA switched capacitor voltage inverter with regulated output.
• Input Voltage Range: 3 V to 6 V.
• Output Voltage: Adjustable, with an accuracy of ±3%.
• Maximum Output Current: 120 mA.
• Switching Frequency: 250 kHz.
• Supply Current: 3 mA to 6 mA.
• Shutdown Current: Typically 2 µA.
• Output Resistance: 9 Ω (open loop).
• Output Ripple Voltage: 38 mV at 60 mA load; 75 mV at 120 mA load.
• Operating Temperature Range: −40°C to +85°C.

The ADP3605AR, a switched-capacitor voltage inverter from Analog Devices, is designed to efficiently generate a negative supply voltage from a positive input. Not only does it operate within a broad input voltage range of 3V to 6V, but it also delivers a regulated output voltage with an impressive accuracy of ±3%. Furthermore, its maximum output current of 120mA ensures sufficient power for low- to medium-power applications, while its high switching frequency of 250 kHz minimizes output ripple and enhances efficiency. In addition to these advantages, its low supply current, which ranges from 3mA to 6mA, contributes to better energy conservation. Moreover, its shutdown mode, drawing only 2µA, allows for significant power savings when the device is not in use.

Beyond its power efficiency, it also boasts a temperature range of -40°C to +85°C, ensuring reliable performance across diverse conditions. Although its output resistance is only 9Ω, its output ripple voltage remains relatively low, staying at 38mV for a 60mA load and 75mV for a 120mA load, thus maintaining signal integrity in sensitive applications. Additionally, its 8-lead SOIC package facilitates easy integration into compact circuit designs, further enhancing its versatility. Because of these characteristics, the ADP3605AR is widely used in applications such as LCD biasing, op-amp power supplies, and portable instrumentation, where efficient voltage inversion is essential. Therefore, its combination of precision regulation, low power consumption, and compact packaging makes it a compelling choice for engineers seeking a reliable negative voltage generator.

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