description
The LT3757 is a wide input voltage range, current mode DC/DC controller that produces positive or negative output voltages. It can be configured as a boost, flyback, SEPIC or negative output converter. Drive a low-side external N-channel power MOSFET from an internal 7.2V regulated supply. The fixed frequency, current mode architecture enables stable operation over a wide range of supply voltages and output voltages.
The LT3757's operating frequency can be set with an external resistor (settable from 100kHz to 1MHz) and can be synchronized to an external clock using the SYNC pin. With a low minimum operating supply voltage (2.9V) and a low shutdown quiescent current (<1μA), the LT3757 is ideal for battery-powered systems.
The LT3757 features soft start and frequency foldback to limit inductor current during startup and output shorts.
Characteristics
Wide input voltage range: 2.9V to 40V
Use a single feedback pin to set the positive or negative output voltage. Current mode control provides excellent transient response. An external resistor can be used to set the operating frequency (100kHz to 1MHz).
Can be synchronized to an external clock with low shutdown current: <1μA
Internal 7.2V Low Dropout Regulator Hysteresis Programmable Input Undervoltage Lockout Programmable Soft Start Small Outline 10-Pin DFN (3mm x 3mm) Package and Thermally Enhanced 10-Pin MSOP Package
application
Automotive and Industrial Boost, Flyback, SEPIC and Negative Output Converters Telecom Power Portable Electronics
LT3757 Application Circuit
LT3757 related information query:
The above is a partial description of the information, see the PDF document for more details!
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