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
AEC-Q100 data available for specific packages
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
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT1936EMS8E#PBF | MS-8 | MS8 | E | 05-08-1660 | Yes |
| LT1936EMS8E#TRPBF | MS-8 | MS8 | E | 05-08-1660 | Yes |
| LT1936HMS8E#PBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LT1936HMS8E#TRPBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LT1936IMS8E#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1936IMS8E#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1936EMS8E#PBF | MS-8 | E | $3.93 | $2.75 | Yes | |
| LT1936EMS8E#TRPBF | MS-8 | E | $2.81 | Yes | ||
| LT1936HMS8E#PBF | MS-8 | H | $5.07 | $3.55 | Yes | |
| LT1936HMS8E#TRPBF | MS-8 | H | $3.61 | Yes | ||
| LT1936IMS8E#PBF | MS-8 | I | $4.71 | $3.30 | Yes | |
| LT1936IMS8E#TRPBF | MS-8 | I | $3.36 | Yes | ||
| Buy Now • Request Samples | ||||||
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 Demo Board | Vin = 4.5V to 36V, Vout = 5V or 3.3V @1.2A | $75.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1936HMS8E#PBF | MS-8 | H | $5.07 | $3.55 | Yes | |
| LT1936HMS8E#TRPBF | MS-8 | H | $3.61 | Yes | ||
| LT1936IMS8E#PBF | MS-8 | I | $4.71 | $3.30 | Yes | |
| LT1936IMS8E#TRPBF | MS-8 | I | $3.36 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Automotive Battery Regulation
- Industrial Control Supplies
- Unregulated Wall Adapters
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
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Models for the following parts are available in LTspice:
LT1936
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
