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LT1936 - 1.4A, 500kHz Step-Down Switching Regulator

Features

  • Wide Input Range: 3.6V to 36V
  • Short-Circuit Protected Over Full Input Range
  • 1.9A Guaranteed Minimum Switch Current
  • 5V at 1.4A from 10V to 36V Input
  • 3.3V at 1.4A from 7V to 36V Input
  • 5V at 1.2A from 6.3V to 36V Input
  • 3.3V at 1.2A from 4.5V to 36V Input
  • Output Adjustable Down to 1.20V
  • 500kHz Fixed Frequency Operation
  • Soft-Start
  • Uses Small Ceramic Capacitors
  • Internal or External Compensation
  • Low Shutdown Current: <2µA
  • Thermally Enhanced 8-Lead MSOP Package

Typical Application

LT1936 Typical Application
LT1936 Typical Application

Description

The LT1936 is a current mode PWM step-down DC/DC converter with an internal 1.9A power switch, packaged in a tiny, thermally enhanced 8-lead MSOP. The wide input range of 3.6V to 36V makes the LT1936 suitable for regulating power from a wide variety of sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters. Its high operating frequency allows the use of small, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.

Cycle-by-cycle current limit, frequency foldback and thermal shutdown provide protection against shorted outputs, and soft-start eliminates input current surge during startup. Transient response can be optimized by using external compensation components, or board space can be minimized by using internal compensation. The low current (<2µA) shutdown mode enables easy power management in battery-powered systems.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

MS-8E

LT1936 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1936EMS8E MSOP 8 E $3.93 $2.75 View
LT1936EMS8E#PBF MSOP 8 E $3.93 $2.75 View
LT1936EMS8E#TR MSOP 8 E $2.81 View
LT1936EMS8E#TRPBF MSOP 8 E $2.81 View
LT1936HMS8E MSOP 8 H $5.07 $3.55 View
LT1936HMS8E#PBF MSOP 8 H $5.07 $3.55 View
LT1936HMS8E#TR MSOP 8 H $3.61 View
LT1936HMS8E#TRPBF MSOP 8 H $3.61 View
LT1936IMS8E MSOP 8 I $4.71 $3.30 View
LT1936IMS8E#PBF MSOP 8 I $4.71 $3.30 View
LT1936IMS8E#TR MSOP 8 I $3.36 View
LT1936IMS8E#TRPBF MSOP 8 I $3.36 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC825A LT1936EMS8E | 500KHz Buck Converter, Vin = 4.5V to 36V, Vout = 5V/3.3V@1.2A $75.00
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Applications

  • Automotive Battery Regulation
  • Industrial Control Supplies
  • Unregulated Wall Adapters

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LT1936

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