Power Management Switching Regulator SEPIC Regulators
Power Management Switching Regulator Flyback, Forward and Isolated Controllers
 Power Management Switching Regulator Step-Up (Boost) Regulators External Power Switch Boost
 Space & Harsh Environment Extended Temperature Plastic (H & MP) Extended Temperature (H & MP) Switching Regulators

LT4363 - High Voltage Surge Stopper with Current Limit

LT3757/LT3757A - Boost, Flyback, SEPIC and Inverting Controller

Features

  • Wide Input Voltage Range: 2.9V to 40V
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Current Mode Control Provides Excellent Transient Response
  • Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor
  • Synchronizable to an External Clock
  • Low Shutdown Current < 1μA
  • Internal 7.2V Low Dropout Voltage Regulator
  • Programmable Input Undervoltage Lockout with Hysteresis
  • Programmable Soft-Start
  • Small 10-Lead DFN (3mm × 3mm) and Thermally Enhanced 10-Pin MSOP Packages

Typical Application

LT3757 Typical Application
LT3757 Typical Application

Description

The LT®3757/LT3757A are wide input range, current mode, DC/DC controllers which are capable of generating either positive or negative output voltages. They can be configured as either a boost, flyback, SEPIC or inverting converter. The LT3757/LT3757A drive a low side external N-channel power MOSFET from an internal regulated 7.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages.

The operating frequency of LT3757/LT3757A can be set with an external resistor over a 100kHz to 1MHz range, and can be synchronized to an external clock using the SYNC pin. A low minimum operating supply voltage of 2.9V, and a low shutdown quiescent current of less than 1μA, make the LT3757/LT3757A ideally suited for batteryoperated systems.

The LT3757/LT3757A feature soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. The LT3757A has improved load transient performance compared to the LT3757.

Packaging

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

DFN-10, MS-10

LT3757 Package Drawing
LT3757 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3757AEDD#PBF DFN 10 E $2.94 $2.06 View
LT3757AEDD#TRPBF DFN 10 E $2.12 View
LT3757AEMSE#PBF MSOP 10 E $2.94 $2.06 View
LT3757AEMSE#TRPBF MSOP 10 E $2.12 View
LT3757AHMSE#PBF MSOP 10 H $3.66 $2.56 View
LT3757AHMSE#TRPBF MSOP 10 H $2.62 View
LT3757AIDD#PBF DFN 10 I $3.16 $2.21 View
LT3757AIDD#TRPBF DFN 10 I $2.27 View
LT3757AIMSE#PBF MSOP 10 I $3.16 $2.21 View
LT3757AIMSE#TRPBF MSOP 10 I $2.27 View
LT3757AMPMSE#PBF MSOP 10 MP $8.54 $5.98 View
LT3757AMPMSE#TRPBF MSOP 10 MP $6.04 View
LT3757EDD#PBF DFN 10 E $2.94 $2.06 View
LT3757EDD#TRPBF DFN 10 E $2.12 View
LT3757EMSE#PBF MSOP 10 E $2.94 $2.06 View
LT3757EMSE#TRPBF MSOP 10 E $2.12 View
LT3757HMSE#PBF MSOP 10 H $3.66 $2.56 View
LT3757HMSE#TRPBF MSOP 10 H $2.62 View
LT3757IDD#PBF DFN 10 I $3.16 $2.21 View
LT3757IDD#TRPBF DFN 10 I $2.27 View
LT3757IMSE MSOP 10 I $3.16 $2.21 View
LT3757IMSE#PBF MSOP 10 I $3.16 $2.21 View
LT3757IMSE#TRPBF MSOP 10 I $2.27 View
LT3757MPMSE MSOP 10 MP $8.54 $5.98 View
LT3757MPMSE#PBF MSOP 10 MP $8.54 $5.98 View
LT3757MPMSE#TR MSOP 10 MP $6.04 View
LT3757MPMSE#TRPBF MSOP 10 MP $6.04 View
Buy Now • Request Samples
* 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
DC1341A LT3757EDD SEPIC Demo Board | 4.5V Vin 36V; Vout = 5V @ 3A $175.00
DC1547A LT3757EDD Boost Demo Board | 3.1V Vin 9V; Vout = 12V @ 1.5A $150.00
DC1548A LT3757EDD Inverting (CUK) Demo Board | 7V Vin 28V; Vout = -15V @ 1A $150.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Automotive and Industrial Boost, Flyback, SEPIC and Inverting Converters
  • Telecom Power Supplies
  • Portable Electronic Equipment

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

To launch a ready to run LTspice demonstration circuit for this part:

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Related models available in LTspice IV
LT3757
LT3757A

Technical Support