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Features
Power stage input voltage from 1V to 16V
Control stage input voltage from 3V to 5.5V
Output voltage adjustable down to 0.6V
Power good flag and shutdown
Output overvoltage and undervoltage detection
±1% feedback voltage accuracy over temperature
Low-side adjustable current sensing
Adjustable soft-start
Tracking and sequencing with shutdown and soft start pins
Switching frequency from 50 kHz to 1 MHz
Exposed pad TSSOP-14 package
Description The LM2746 is a high-speed synchronous buck regulator controller with a feedback voltage accuracy of ±1%. It can provide simple
down conversion to output voltages as low as 0.6V. Though the control sections of the IC are rated for 3 to 5.5V, the driver
sections are designed to accept input supply rails as high as 16V. The use of non-overlapping MOSFET gate drivers helps avoid
potential shoot-through problems while maintaining high efficiency. The IC is designed for the more cost-effective option
of driving only N-channel MOSFETs in both the high-side and low-side positions. It senses the low-side switch voltage drop
for providing a simple, adjustable current limit.
The fixed-frequency voltage-mode PWM control architecture is adjustable from 50 kHz to 1 MHz with one external resistor. This
wide range of switching frequency gives the power supply designer the flexibility to make better tradeoffs between component
size, cost and efficiency.
Features include soft-start, input undervoltage lockout (UVLO) and Power Good (based on both undervoltage and overvoltage
detection). In addition, the shutdown pin of the IC can be used for providing startup delay, and the soft-start pin can be
used for implementing precise tracking, for the purpose of sequencing with respect to an external rail.
Applications
Cable Modem, DSL and ADSL
Laser Jet and Ink Jet Printers
Low Voltage Power Modules
DSP, ASIC, Core and I/O
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Also Recommended
| LM2743▲ | Synchronous Buck Controller With Tracking And Soft-Start |
| LM3743▲ | Low-Voltage Synchronous Buck Controller In MSOP-10 |
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