The LT1936 from Analog Devices (originally Linear Technology) is a monolithic step-down switching regulator - a current-mode buck converter with the power switch built in. It steps a higher input rail down to a regulated lower output, handling up to 1.4 A of output current. LT1936EMS8E#PBF is the 8-lead MSOP with exposed pad (MS8E), lead-free version.

It accepts a wide input of 3.6 V to 36 V, switching at a fixed 500 kHz that keeps external inductor and capacitor small while staying above the AM band. Current-mode control with cycle-by-cycle current limit gives fast transient response and simple loop compensation. The output is set by an external resistor divider on the feedback pin, adjustable down to the 1.2 V reference, and the part reaches efficiencies above 90% at typical 3.3 V/5 V outputs.

The boost pin and internal switch drive the external catch diode and inductor; the SHDN pin gives a low-current (sub-µA) shutdown, and the device includes soft-start, cycle-by-cycle current limit and thermal shutdown. The exposed pad (EP) under the MSOP package is the ground connection and the main thermal path, and must be soldered to the board. The LT1936 suits compact 24 V industrial and automotive point-of-load supplies.

Note: Values are taken from the ADI/Linear LT1936 datasheet. Confirm every parameter against the latest official documentation before committing a design.

LT1936EMS8E#PBF is supplied in the 8-lead MSOP with exposed pad (MS8E); "#PBF" marks the RoHS-compliant lead-free finish. The exposed die pad on the bottom is the GND connection and the primary thermal path - it must be soldered to a board copper pour (with thermal vias) for both electrical ground and heat removal. Keep the SW/BOOST switching loop and the catch diode tight, place the input capacitor close to VIN, and keep the FB divider near the FB pin. Package dimensions and pin-1 orientation are shown below.

📄 Full specifications are detailed in the official ADI/Linear LT1936 datasheet.

The 8-lead MSOP-EP brings out the power, switching and control pins (see the package drawing below for the exact pin numbering):

• VIN: Input supply, 3.6 V to 36 V.
• SW: Switch node - connect the inductor and catch diode here.
• BOOST: Bootstrap pin for the internal switch gate drive (boost capacitor to SW).
• GND / EP: Ground; the exposed pad is GND and the thermal path, solder to the board.
• FB: Feedback input - sets the output via an external divider to the 1.2 V reference.
• VC: Error-amplifier output / loop-compensation node.
• SHDN: Active-low shutdown (low-current off state); also sets undervoltage lockout.

Refer to the package drawing below for the physical pin numbering of the 8-lead MSOP-EP.

The parts below are related ADI/Linear step-down regulators in our catalog. They are not all drop-in replacements; verify input range, output current, frequency and pinout before substituting.

Selection Tips: Use the LT1936 for a 36 V, 1.4 A, 500 kHz buck. The LT1933 is a smaller 500 mA version, the LT3470A a micropower part with LDO, the LT1976 a 60 V higher-input part with Burst Mode for light loads, and the LT1767 a higher-frequency (1.25 MHz) 1.5 A part with lower max input.

Linear Technology, now part of Analog Devices, is known for high-performance power management. The LT1936 is a compact monolithic buck regulator that integrates the power switch and current-mode control, simplifying 24 V-class step-down designs.

The device is backed by full datasheet characterization and application notes on inductor and diode selection, feedback divider design and thermal layout of the exposed pad - the details that determine an efficient, reliable buck converter.