The LM2676 series of regulators are monolithic
integrated circuits which provide all of the active functions for a step-down (buck)
switching regulator capable of driving up to 3A loads with excellent line and load
regulation characteristics. High efficiency (> 90%) is obtained through the use of a low
ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V,
and 12V and an adjustable output version.
The SIMPLE
SWITCHER power converter concept provides for a complete design using a minimum
number of external components. A high fixed frequency oscillator (260kHz) allows the use of
physically smaller sized components. A family of standard inductors for use with the LM2676
are available from several manufacturers to greatly simplify the design process.
The LM2676 series also has built-in thermal
shutdown, current limiting, and an ON and OFF control input that can power down the
regulator to a low 50µA quiescent current standby condition. The output voltage is specified
to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
The LM2676 series of regulators are monolithic
integrated circuits which provide all of the active functions for a step-down (buck)
switching regulator capable of driving up to 3A loads with excellent line and load
regulation characteristics. High efficiency (> 90%) is obtained through the use of a low
ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V,
and 12V and an adjustable output version.
The SIMPLE
SWITCHER power converter concept provides for a complete design using a minimum
number of external components. A high fixed frequency oscillator (260kHz) allows the use of
physically smaller sized components. A family of standard inductors for use with the LM2676
are available from several manufacturers to greatly simplify the design process.
The LM2676 series also has built-in thermal
shutdown, current limiting, and an ON and OFF control input that can power down the
regulator to a low 50µA quiescent current standby condition. The output voltage is specified
to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.