The LT3500IDD is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 40V makes the LT3500IDD suitable for regulating power from a wide variety of sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters.
Resistor-programmable 250kHz to 2.2MHz frequency range and synchronization capability enable optimization between efficiency and external component size. Cycle-by-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking.
The LT3500IDD contains an internal NPN transistor with feedback control which can be configured as a linear regulator or as a linear regulator controller.
The LT3500’s low current shutdown mode (<12μA) enables easy power management in battery-powered systems.
Feature
- Wide Input Range: 3V to 36V Operating, 40V Maximum
- Short-Circuit Protected Over Full Input Range
- 2A Output Current Capability
- Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.2MHz
- Soft-Start/Tracking Capability
- Output Adjustable Down to 0.8V
- Adjustable Linear Regulator/Driver with 13mA Output Capability
- Power Good Comparator with Complimentary Outputs
- Low Shutdown Current: 12μA
- Thermally Enhanced 3mm × 3mm DFN or 16-Pin MSOP Package
Applications
- Automotive Battery Regulation
- Industrial Control
- Wall Transformer Regulation
- Distributed Power Regulation
(Picture: Pinout)
