- Efficiency up to 96%
- Available in SO-8, 8-pin DIP and LLP packages
-
Computer design software The LM267X simplifies complexity Version 6.0
- Simple, easy to design
- Only 5 external elements are required
- Utilize off-the-shelf standard inductors
- 3.3V and 5.0V, 12V, and adjustable output versions
- Adjustable version output voltage range: 1.21V to 37V
- ± 1.5%, maximum output overvoltage line and load tolerance
- Guaranteed 1A output load current
- 0.25 Ω DMOS output switch
- Wide input voltage range: 8V to 40V
- 260 kHz fixed frequency internal oscillator
- TTL shutdown capability, low-power standby mode
- Soft start and frequency synchronization
- Thermal shutdown and current limit protection
illustrate
This series of voltage regulators LM2672 is a monolithic integrated circuit manufactured with the LMDMOS process. These regulators provide all buck-active (buck) switching regulators to drive 1A loads with excellent line and load regulation currents. These devices are available in fixed output voltages of 3.3V and 5.0V, 12V, and adjustable output versions.
Requiring a minimum number of external components, these regulators are simple and easy to use, including patented internal frequency compensation (patent numbers 5382918 and 5514947), fixed frequency oscillators, external shutdown, soft start, frequency synchronization.
The LM2672 series operates on switching frequencies 260 kHz , so that the small size will be smaller than the low frequency switching regulator will require a filter element. Due to its extremely high efficiency ("90%), copper wires on printed circuit boards are the only heat dissipation needs.
A family that uses standard inductors with the LM2672 can be purchased from several different manufacturers. This feature greatly simplifies the use of these advanced integrated circuit design supplies for switching power supplies. In addition, the datasheet includes a guide to selecting diodes and design operating in switch-mode power supply capacitors.
Other features include ± guaranteed tolerance of 1.5% and ± 10% oscillator frequency under specified output voltage and input voltage of the output load. External shutdown is included with a typical standby current of 50μA. Includes output switching current limiting and adequate protection for thermal shutdown in fault conditions.
In order to simplify the design process of LM2672 step-down regulator, there is a computer design software. The LM267X simplifies complexity Version 6.0.
|