The LTC3801EST from Linear Technology is a high-performance, constant-frequency, step-down DC/DC controller that is designed to drive an external power MOSFET at switching frequencies up to 3MHz. This compact, efficient controller is ideal for portable power devices, owing to its low quiescent current and high-frequency operation which allows for the use of small, low-cost capacitors and inductors.

Key Features

• High Switching Frequency: With the ability to operate at up to 3MHz, the LTC3801EST enables the use of smaller passive components, resulting in a compact power supply design.
• Low Quiescent Current: Its no-load quiescent current of only 70μA (typical) makes it suitable for battery-powered applications where power efficiency is critical.
• Wide Input Voltage Range: The device can handle a wide range of input voltages from 2.75V to 9.8V, accommodating various battery chemistries and configurations.
• Adjustable Output Voltage: The output voltage is adjustable from 0.8V to VIN, allowing for a broad range of output voltage settings tailored to the needs of the application.
• Current Mode Operation: Provides excellent line and load transient response.
• Stable with Ceramic Capacitors: The LTC3801EST can achieve stability with ceramic output capacitors, which are smaller, more reliable, and have lower equivalent series resistance (ESR) than other types.

Applications

The LTC3801EST is suitable for a wide array of applications, including but not limited to:

• Portable instruments
• Wireless modems
• Digital cameras
• Medical devices
• GPS receivers

Package and Availability

The LTC3801EST is offered in a compact 16-pin ThinSOT package, which is optimal for space-constrained applications. Its high-frequency operation and low-profile package make it an excellent choice for modern, slim electronic devices. For pricing, samples, and further information, please contact Linear Technology or an authorized distributor.