LTC3103EDD#TRPBF

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The LTC3103EDD#TRPBF is a versatile dual-input linear voltage regulator optimized for energy collection applications. It integrates a buck-boost switching regulator and a complementary low-dropout (LDO) linear regulator to provide a power supply adjustable from 1.8 V to 5 V, with up to 8 W of total output power. The LTC3103EDD#TRPBF is designed to efficiently operate over a wide input voltage range, while minimizing power loss and keeping the output noise low. It is fully protected with integrated input and output overvoltage protection, overcurrent protection, and thermal shutdown. The application fields of LTC3103EDD#TRPBF which is an DC DC switching regulator includes battery-powered industrial sensors, healthcare devices and wearable electronics.

The LTC3103EDD#TRPBF is able to operate under both buck and boost mode. The buck mode is used to regulate outputs up to 8 V while the boost mode requires an input source of 3 V or higher and delivers regulated outputs up to 20 V. This feature makes the device ideal for powering applications from a single Li-ion cell, a wide range of sources, or both. The input voltage to the device can be dynamically changed over a wide range, from 1.8 V to 5 V, allowing the regulator to maintain a tight output in spite of variations in input sources. Any degradation in input voltage or disruption of load current causes an immediate shut-down of the device.

The LTC3103EDD#TRPBF features advanced power conversion with a quiescent current of only 2.5 mA (typ) and maximum efficiency of up to 98%. In boost mode, the switching frequency varies between 200 kHz to 2.2 MHz depending on the input and output conditions, while in buck mode the switching frequency is set to 2.2 MHz. The frequency can be carefully controlled at different points of operation to reduce EMI and reduce power losses. The LTC3103EDD#TRPBF is also capable of providing a hysteretic wake-up capability up to 15 μA.The LTC3103EDD#TRPBF provides two enable pins, one for each section. The enables are active low when pulled below 0.2 V.

A key feature of the LTC3103EDD#TRPBF is the wide range of output voltage options; it can provide output voltages from 1.5 V to 20 V. The output is monitored by the device’s on-chip comparator, and the voltage is adjusted via a resistor divider. The device also has an internal soft-start feature that can be adjusted to prevent large inrush currents from occurring during start-up. The LTC3103EDD#TRPBF also features an internal parameterizable frequency foldback system which will reduce the switching frequency at light load, dramatically reducing the power losses and improving the light-load efficiency.

The LTC3103EDD#TRPBF has integrated protection features, such as input under-voltage lockout (UVLO) that prevents false triggering of the device under fast transients, over-current and thermal protection. In addition, a protection capacitor must be incorporated in the design to prevent false triggering of the protection circuit.

The LTC3103EDD#TRPBF is widely used in various industry applications such as mountain bike lights, remote control systems, wearable medical devices, laptop power management, and portable industrial sensors. It provides an integrated solution for efficiently and reliably regulating the power supply for these systems. The wide range of features, the quiescent current, the low noise, and the high efficiency make the LTC3103EDD#TRPBF an ideal choice for powering a variety of applications.

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