LT3667 Datasheet PDF – Step-Down Switching Regulator

Part Number: LT3667

Function: 40V, 400mA, Step-Down Switching Regulator

Package: Lead MSOP and 24-Lead (3mm × 5mm) QFN type

Manufacturer: Linear Technology, Analog Devices


LT3667 datasheet



The LT3667 is a monolithic triple power supply composed of a 400mA buck switching regulator and two 200mA low dropout linear regulators (LDOs).

The buck regulator includes a high efficiency switch, a boost diode, and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application.

Each LDO supplies 200mA of output current with a typical dropout voltage of 340mV, and each LDO has an accurate resistor programmable current limit.



1. Adjustable 250kHz to 2.2MHz Switching Frequency
2. Synchronizable Between 300kHz and 2.2MHz
3. Programmable Undervoltage Lockout
4. Power Good Indicators



1. Automotive Battery Regulation
2. Power for Portable Instrumentation
3. Industrial Supplies
4. Fault-Protected Sensor Supply

Other data sheets are available within the file:


LT3667 Datasheet PDF Download

LT3667 pdf