The LD49300xx is a high-bandwidth, low dropout, 3.0A voltage regulator, ideal for powering core voltages of low-power microprocessors. The LD49300xx implements a dual supply configuration allowing for very low output impedance and very fast transient response. The LD49300xx requires a bias input supply and a main input supply, allowing for ultra-low input voltages on the main supply rail. The input supply operates from 1.4V to 5.5V and the bias supply requires between 3V and 6V for proper operation. The LD49300xx offers fixed output voltages from 0.8V to 1.8V and adjustable output voltages down to 0.8V. The LD49300xx requires a minimum output capacitance for stability, and works optimally with small...
The LD49300xx is a high-bandwidth, low dropout voltage regulator designed for powering core voltages of low-power microprocessors. It implements a dual supply configuration with a bias input supply (3V to 6V) and a main input supply (1.4V to 5.5V), allowing for ultra-low input voltages on the main rail. The device offers fixed output voltages from 0.8V to 1.8V and adjustable output voltages down to 0.8V, requiring a minimum output capacitance for stability, working optimally with small ceramic capacitors.
Key features include a maximum dropout voltage of 400 mV over temperature, excellent line and load regulation, and ultra-fast transient response with up to 10 MHz bandwidth. The regulator includes logic-controlled shutdown, thermal shutdown, and current limit protection, with a junction temperature range of -25°C to 125°C. It is available in the PPAK package.
| Output current | 3 A |
|---|---|
| Input voltage range (Main) | 1.4 V to 5.5 V |
| Bias supply voltage range | 3 V to 6 V |
| Maximum dropout voltage | 400 mV |
| Adjustable output voltage minimum | 0.8 V |
| Transient response bandwidth | 10 MHz |
| Junction temperature range | -25 °C to 125 °C |
| Package type | PPAK |
The adjustable output voltage can go down to 0.8 V.
The main input supply operates from 1.4 V to 5.5 V, while the bias supply requires between 3 V and 6 V.
Yes, it includes thermal shutdown and current limit protection.