Analog Devices LTC3872

Description

The LTC®3872 is a constant frequency current mode boost DC/DC controller that drives an N-channel power MOSFET and requires very few external components. The No RSENSE TM architecture eliminates the need for a senseresistor, improves efficiency and saves board space.

The LTC3872 provides excellent AC and DC load and line regulation with ±1.5% output voltage accuracy. It incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2.3V.

High switching frequency of 550kHz allows the use of small inductor. The LTC3872 is available in an 8-lead low profile (1mm) ThinSOTTM package and 8-pin 2mm × 3mm DFN package.

Features

• No Current Sense Resistor Required
• VOUT up to 60V
• Constant Frequency 550kHz Operation
• Internal Soft-Start and Optional External Soft-Start
• Adjustable Current Limit
• Pulse Skipping at Light Load
• VIN Range: 2.75V to 9.8V
• ±1.5% Voltage Reference Accuracy
• Current Mode Operation for Excellent Line and Load Transient Response
• Low Profile (1mm) SOT-23 and 2mm × 3mm DFN Packages

Typical applications

• IP Phone Power Supplies
• Telecom Power Supplies
• 24V Industrial Controls
• 42V Automotive Systems

More information

• Datasheet
• IC product information