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> LM2677 5 amp integrated fet switching regulator 2-40V
LM2677 5 amp integrated fet switching regulator 2-40V
Qty:2 LM2677 -T-ADJ 7 pin TO220
Switch-Mode Regulator - Hi efficiency
External Sync allows parallelling multiple devices in-phase
(Application schematics in data sheet)
The LM2677 series are integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 5A loads with excellent line and load regulation. 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. This IC is the ADJUSTABLE version.
The SIMPLE SWITCHER concept provides for a complete design using a minimum number of external components. The switching clock frequency can be provided by an internal fixed frequency oscillator (260KHz) or from an externally provided clock in the range of 280KHz to 400Khz which allows the use of physically smaller sized components. A family of standard inductors for use with the LM2677 are available from several manufacturers and can be supplied on request when quantities permit.
The external Sync clock provides direct and precise control of the output ripple frequency for consistent filtering or frequency spectrum positioning.
The LM2677 also has built in thermal shutdown, current limiting and an ON/OFF control input that can power down the regulator to a low 50 A quiescent current standby condition.
