LT3757IMSE#TRPBF
DC DC Switching Controllers
Technical Specifications
| Type | Description |
|---|---|
| Synchronous Rectifier | No |
| Switch tube (built-in/external) | External |
| Features | Adjustable soft-start;Frequency synchronization;Built-in LDO regulator;External compensation |
| Channels | 1.0 |
| Topology | Boost;SEPIC;Flyback;Inverting |
| Working Voltage V | 21.45 V |
| Output Voltage | - |
| Type | Description |
|---|---|
| Operating Temp | -40°C ~ +125°C @(TA) |
| Output Current | - |
| Switching Freq Hz | 550 kHz |
| Output Type | Adjustable |
| Function | Buck-Boost |
| Iq A | 1.6e-06 |
| Package / Case | MSOP-10-EP |
Product Introduction
The LT3757/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 battery-operated systems.
The LT3757/LT3757A feature soft-start and frequency foldback functions to limit inductor current during startup and output short-circuit. The LT3757A has improved load transient performance compared to the LT3757.
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
Applications
- - Automotive and Industrial Boost, Flyback, SEPIC and Inverting Converters - Telecom Power Supplies - Portable Electronic Equipment
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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