- Up to 96% conversion efficiency
- Available in SO-8 packages, 8-pin DIP and LLP packages
-
Computer design software The LM267X makes it simple Version 6.0
- Simple and easy to use design with
- Only 5 external components are required
- Use off-the-shelf standard inductors
- 3.3V, 5.0V, 12V and adjustable output versions
- Adjustable version output voltage range from 1.21V to 37V
- ± 1.5% maximum output exceeds line voltage tolerance and load conditions
- Guaranteed output load current of 1A
- 0.25Ω DMOS output switch
- Wide 8V to 40V Input Voltage Range:
- Internal oscillator at fixed frequency at 260 kHz
- TTL shutdown capability, low-power standby mode
- Soft-start and frequency synchronization
- Thermal shutdown and current limit protection
illustrate
The LM2672 series of regulators are monolithic integrated circuits with a built-in LMDMOS process. These regulators offer all positive buck (buck) switching regulators capable of driving 1A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V, 12V, adjustable output versions.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation patents (patent numbers 5382918 and 5514947), fixed frequency oscillators, external shutdown, soft start, and frequency synchronization.
The LM2672 series switches operate at a switching frequency 260 kHz This allows for a small size ratio with the lower frequency switching regulator required for the filter assembly. Due to its very high efficiency (> 90%), copper traces of the printed circuit board are the only heat dissipation required.
A home of standard inductors with LM2672 is available from several different manufacturers. This feature greatly simplifies the design of switching power supplies using these advanced integrated circuit supplies. Also included in the datasheet is a guide to selecting diodes and capacitors designed to operate in switch-mode power supplies.
Other features include a guaranteed tolerance of 1.5% of the output voltage specified in the ± and output load conditions for the input voltage and output load conditions, and a ± 10% of the oscillator frequency. External shutdown with a typical standby current of 50μA. The output switch includes current limit, thermal shutdown, and full protection during fault conditions.
To simplify the design process of the LM2672 buck regulator, computer design software exists, The LM267X makes it simple Version 6.0.
|