PRODUCT 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 startup and output short-circuit. The LT3757A has improved load transient performance compared to the LT3757.
PRODUCT PROPERTIES
Product Status | Active |
Output Type | Transistor Driver |
Function | Step-Up, Step-Up/Step-Down |
Output Configuration | Positive and Negative |
Topology | Boost, Flyback, SEPIC |
Number of Outputs | 1 |
Output Phases | 1 |
Voltage - Supply (Vcc/Vdd) | 2.9V ~ 40V |
Frequency - Switching | 100kHz ~ 1MHz |
Duty Cycle (Max) | - |
Synchronous Rectifier | No |
Clock Sync | Yes |
Serial Interfaces | - |
Control Features | Enable, Frequency Control, Soft Start |
Operating Temperature | -40°C ~ 125°C (TJ) |
Mounting Type | Surface Mount |
Package / Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad |
Supplier Device Package | 10-MSOP-EP |
Base Product Number | LT3757 |