The LM2672 series of regulators are monolithic integrated DC-DC converter built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation, fixed frequency oscillator, external shutdown, soft-start, and frequency synchronization.
The LM2672 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of its very high efficiency (>90%), the copper traces on the printed-circuit board are the only heat sinking required.
| Vin (min) (V) | 6.5 |
| Vin (max) (V) | 40 |
| Vout (min) (V) | 1.23 |
| Vout (max) (V) | 37 |
| Iout (max) (A) | 1 |
| Iq (typ) (mA) | 2.5 |
| Switching frequency (min) (kHz) | 225 |
| Switching frequency (max) (kHz) | 400 |
| Features | Enable, Over Current Protection |
| Operating temperature range (°C) | -40 to 125 |
| Rating | Catalog |
| Regulated outputs (#) | 1 |
| Control mode | Voltage mode |
| Duty cycle (max) (%) | 95 |
| Type | Converter |
| PDIP (P) | 8 | 92.5083 mm² 9.81 x 9.43 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
| WSON (NHN) | 16 | 25 mm² 5 x 5 |
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