STMicroelectronics L3751 Synchronous Buck Controller

STMicroelectronics L3751 Synchronous Buck Controller is a 6V to 75V wide input voltage range controller. The L3751 features an extreme voltage conversion ratio over a switching frequency range of 100kHz-1MHz, thanks to a 40nsec minimum conduction time. The diode emulation (DEM) implements a pulse skipping mode that maximizes the efficiency at light-load, giving controlled output voltage ripple. The forced PWM (FPWM) over the load range makes the switching frequency constant and minimizes the output voltage ripple.

Features

Wide 6V to 75V input voltage range
Adjustable output voltage from 0.8V to 60V
100kHz – 1MHz switching frequency range
40nsec minimum on-time for extreme duty ratio
Low dropout operation during line transient
Adjustable soft-start or input voltage tracking
Pulse skipping or forced PWM operation at light load
Synchronization
Adjustable precision enable
Power Good open collector output validates VOUT

7.5V gate drivers for standard VTH MOSFETs
Constant current protection with hiccup mode
Precision or lossless programmable current sensing
Improved line transient response
Input voltage undervoltage lockout
Internal voltage monitoring
Thermal protection
Operating junction temperature range -40°C to 150°C

Applications

Telecom, networking, and industrial applications
Failsafe systems

Unregulated 24V and 48V input voltage bus
Conversion from high voltage battery to 12V and 5V rail

STMicroelectronics L3751 Synchronous Buck Controller

Features

Applications

Videos

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