Noise - 0.1Hz to 10Hz:	--
Base Part Number:	AP432
Supplier Device Package:	SC-59-3
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Operating Temperature:	-20°C ~ 85°C (TA)
Current - Cathode:	300µA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	30ppm/°C
Tolerance:	±1%
Current - Output:	200mA
Voltage - Output (Max):	20V
Voltage - Output (Min/Fixed):	1.24V
Output Type:	Adjustable
Reference Type:	Shunt
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Reference: AP432WL-7 Application Field and Working Principle

The AP432WL-7 is a low-power, low-dropout (LDO) voltage regulator specifically designed for portable applications that emphasize low-power consumption. The device is provided in an SO-8 package with an operating temperature range of 0°C to 85°C. It can be used to generate both positive and negative voltage outputs for use in multiple applications.The AP432WL-7 is high efficiency and can regulate input voltages from 2.5V to 5.5V, providing a regulated output voltage from 0.6V to 5.0V. The output voltage is adjustable by setting a fraction of the input voltage as the output. The device features an internal power-on reset circuit that forces the output voltage to the initial voltage programmed on power-up and minimizes output voltage droop as the output current increases. It also features an under-voltage lockout protection, providing protection against supply voltage drops below 2.5V.The AP432WL-7 has a versatile charging function with a programmable reset cycle timer and charge current control. The reset cycle timer allows the device to reset each time the input voltage reaches the minimum under-voltage lockout limit, thus preventing unnecessary battery charge currents and over-discharging. The reset cycle timer monitors the voltage during charging operation and prevents excessive charging. The charging output can also be controlled by setting the charge current with input capacitor Cin.The device employs extreme current optimization technology, providing up to 80% efficiency. The device also contains a thermal protection circuit that shuts down the output current in case of overheating due to an increase in ambient temperature.In terms of the application field, the AP432WL-7 is an ideal device for providing the regulated voltage for cellular phone, PDAs, digital still cameras, and other mobile devices. It is also suitable for use in automotive and medical applications.The working principle of the AP432WL-7 is simple and straightforward. When the power supply is connected to the device, the voltage regulator senses when the input voltage is within the operating range and then activates the output switch to begin the regulation.The output voltage then gets regulated by an internal feedback loop that reads the output voltage and adjusts the output switch accordingly. As long as the input voltage is within the operating range and the output switch is open, then the output voltage remains constant.When the input voltage goes below the under-voltage lockout limit (UVLO), the output switch will close and the output voltage will drop. The Reset cycle timer can then be used to reset the input voltage to the minimum value, which will then reactivate the output switch and begin the regulation again.The charging function of the AP432WL-7 also works by controlling the charging current. An external resistor can be used to adjust the charging current, while the voltage applied to the device\'s charge current pin determines the value of the charge current. The AP432WL-7 is an extremely efficient and reliable device for portable applications requiring low-power, ultra-low noise and low-dropout voltage regulation. It also offers over-voltage and over-temperature protection as well as an under-voltage lockout feature, making it a great choice for applications that require high reliability and low current consumption.

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