A skinny 3A regulator
Linear Technology has squeezed a 3A voltage regulator into a package measuring just 6.25mm square and 1.8 mm high. The complete LTM4623 circuit only requires one input capacitor and one output capacitor, a resistor to set Vout and a small capacitor for Vout tracking and soft-start.
Linear Technology has squeezed a 3A voltage regulator into a package measuring just 6.25mm square and 1.8 mm high. The complete LTM4623 circuit only requires one input capacitor and one output capacitor, a resistor to set Vout and a small capacitor for Vout tracking and soft-start. At just 1.8mm height the regulator can be mounted on the PCB reverse side.
Key features of the LTM4623:
- Wide input voltage range: 4V to 20V
- Input voltage down to 2.375V with external bias
- 0.6V to 5.5V output voltage
- 3A DC output current
- ±1.5% Maximum total DC output voltage error
- Current mode control, fast transient response
- Low EMI EN55022 Class B compliant
- External frequency synchronization
- Multiphase operation with current sharing
- Output voltage tracking
- Selectable discontinuous mode
- Power Good indicator
- Overvoltage, overcurrent and overtemperature protection
- LGA package
The operating efficiency for converting 12 Vin to 1.5 Vout and 3.3 Vout at 3 A is 80% and 88%, respectively. Power loss for 12 Vin to 1.5 Vout is 1.1 W, resulting in a 24°C rise in junction temperature. The LTM4623 is rated for operation from minus 40°C to plus 125°C.
