LT3650EDD-8.4#PBF

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The LT3650EDD-8.4#PBF is an integrated DC to DC synchronous boost Power Management Integrated Circuit (PMIC-Battery Charger) with selectable pin setting and an integrated switched capacitor charge pump providing up to 18V of output voltage. This device is designed to support one or two cell lithium or other batteries with minimum additional passives. The LT3650EDD-8.4#PBF is available in a tiny SOT-23 package and can easily be included in a wide range of portable applications.

The LT3650EDD-8.4#PBF is an ideal solution for designs that need to provide charge, bias and power inputs and efficiently manage multiple energy storage options, including solid state storage, super capacitor banks, or traditional batteries such as lithium ion or lead acid. Its simple input to output design and a wide range of voltage and current ranges make it an ideal choice for applications such as GPS trackers, Bluetooth low energy devices, medical sensors, and portable electronics.

The LT3650EDD-8.4#PBF is a synchronous buck boost regulator which is capable of providing up to 1.2A of continuous output current with the input voltage ranging from the battery voltage down to 3.5V typical. The output voltage is adjustable from 5V to 18V with a tolerance of +/- 10%. The device also features a programmable timer which can be used to terminate the charging of a battery when the current is below a certain level (<50mV). This makes the LT3650EDD-8.4#PBF a safe and reliable solution for battery charging applications.

In addition to its battery charging capabilities, the LT3650EDD-8.4#PBF also features a wide range of protection circuitries to ensure system safety. These protection circuitries include overvoltage limit, undervoltage protection, and overcurrent protection, as well as voltage monitoring circuit to detect when the battery has been fully charged. This device also features a power-good indicator to indicate when the power supply is ready for use.

The LT3650EDD-8.4#PBF operates in four different combinations, depending on the voltage of the battery. It can be operated in boost/buck mode for a supply voltage that is below the output voltage, in buck-only mode or boost-only mode for a supply voltage that is higher than the output voltage, and in power-operational mode for supplying a constant output voltage.

In boost mode, the LT3650EDD-8.4#PBF operates as a synchronous rectifier and output voltage is voltage-controlled by the error amplifier in the chip. In buck mode, the output voltage is current-controlled and the pulse width modulation (PWM) control circuit will adjust the duty cycle of the buck converter to achieve the output voltage. In power-operational mode, the chip is capable of operating continuously even when the input voltage is below the output voltage, which can be very useful for applications where the input voltage needs to stay within a certain range.

The LT3650EDD-8.4#PBF also features an integrated switched capacitor charge pump that can be used to efficiently provide an output voltage of up to 18V, making it an ideal choice for powering a variety of portable devices and sensors. Its wide input voltage range and range of output voltage and current ranges make it an ideal choice for a wide range of applications.

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