Description

The LT1619EMS8#TRPBF is a fixed frequency PWM controller designed for implementing current mode DC/DC converters with minimal external parts. It is suitable for a variety of battery-powered and distributed DC/DC converters. This controller operates with input voltages ranging from 1.9V to 18V. The internal rail-to-rail N-channel MOSFET driver can operate in both nonbootstrapped and bootstrapped modes. It is specifically designed for driving a low side power transistor in boost, SEPIC, flyback, and other topologies.

Specifications and features

The LT1619EMS8#TRPBF offers the following specifications and features:

• Wide VIN Range: 1.9V to 18V
• 300kHz Fixed Frequency Current Mode Control
• 1A Rail-to-Rail N-Channel MOSFET Driver
• Low 53mV Current Limit Threshold Voltage for Improved Efficiency
• Implements Boost, SEPIC, and Flyback Converters Requiring Low Side Power Transistors
• Internal Current Sense Amplifier with Leading Edge Blanking
• Up to 500kHz External Synchronization
• Burst Mode® Operation for High Efficiency at Light Load
• 140µA Quiescent Current
• 15µA Shutdown Current
• Available in 8-Lead MSOP and SO Packages

Application Scenarios

The LT1619EMS8#TRPBF is commonly used in the following applications:

• 3.3V to 5V DC/DC Converters
• Distributed Power Supplies
• Isolated Power Supplies

Comparison

- Wide input voltage range

- Fixed frequency current mode control

- Rail-to-rail N-channel MOSFET driver

- Low current limit threshold voltage for improved efficiency

- Suitable for various converter topologies

- Internal current sense amplifier with leading edge blanking

- External synchronization capabilities

- High efficiency at light loads

- Low quiescent and shutdown currents

- Available in 8-Lead MSOP and SO packages

- None identified