LT3500 is a monolithic 2A step-down regulator plus linear regulator/controller. It has a wide input range: 3V to 40V, which makes it suitable for a variety of power sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters. The device also has resistor-programmable 250kHz to 2.2MHz frequency range and synchronization capability, which enable optimization between effi ciency and external component size. Cycle- by-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. Soft-start feature can control the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking. LT3500 also contains an internal NPN transistor, which has feedback control and can be configured as a linear regulator or a linear regulator controller. LT3500's low current shutdown mode (<12μA) enables easy power management in battery-powered systems.
The LT3500 provides a wide input voltage range (3 V to 40 V) and up to 2 A of output current, making it suitable for automotive batteries, industrial supplies, and wall adapters. It features a programmable switching frequency from 250 kHz to 2.2 MHz, soft‑start, and output‑tracking capabilities.
The device includes a power‑good comparator, low shutdown current (12 µA), and can operate as either a linear regulator or a linear regulator controller. Available in 3 mm × 3 mm DFN or 16‑pin MSOP packages, it offers protection features such as cycle‑by‑cycle current limit, frequency foldback, and thermal shutdown.
| Input voltage range | 3 V to 40 V |
|---|---|
| Maximum output current | 2 A |
| Switching frequency range | 250 kHz to 2.2 MHz |
| Shutdown current (typical) | 12 µA |
| Package options | 3 mm × 3 mm DFN or 16‑Pin MSOP |
| SHDN threshold (typical) | 0.76 V |
The LT3500 operates from 3 V up to 40 V input.
The device has a typical shutdown current of 12 µA.
It is offered in a 3 mm × 3 mm DFN package and a 16‑lead MSOP package.