0
ACTIVE
Rating |
Catalog |
Topology |
Buck |
Iout (max) (A) |
5 |
Vin (max) (V) |
40 |
Vin (min) (V) |
8 |
Vout (max) (V) |
37 |
Vout (min) (V) |
1.23 |
Features |
Frequency synchronization, Over Current Protection |
Control mode |
Voltage mode |
Operating temperature range (°C) |
-40 to 125 |
Iq (typ) (A) |
0.0042 |
Duty cycle (max) (%) |
91 |
TO-220 (NDZ)-7-82.6008 mm² 10.16 x 8.13
The LM2678 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 5A 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 LM2678 are available from several manufacturers to greatly simplify the design process.
The LM2678 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.
WELL LINK CHIPS GROUP CO.,LIMITED FLAT/RM 1802 BEVERLY HOUSE 93-107 LOCKHART ROAD WANCHAI HK
