LD49300PT08R

The LD49300 is a high-bandwidth, low-dropout, 3.0 A voltage regulator, ideal for powering core voltages of low power microprocessors. The LD49300 implements a dual supply configuration, which guarantees a very low output impedance and a fast transient response. The LD49300 requires a bias input supply and a main input supply, allowing ultra-low input voltages on the main supply rail. The input supply operates from 1.4 V to 5.5 V and bias supply requires between 3 V and 6 V to work properly. The LD49300 offers fixed output voltages from 0.8 V to 1.8 V and adjustable output voltages from 0.8 V. The LD49300 requires a minimum output capacitance for stability, and works optimally with small ceramic capacitors.

Applications

• Graphics processors
• PC add-in cards
• Microprocessor core voltage supply
• Low voltage digital ICs
• High efficiency linear power supplies
• SMPS post regulators

Key features

• Input voltage range: – VI = 1.4 V to 5.5 V – VBlAS = 3 V to 6 V
• Stable with ceramic capacitors
• ±1.5% initial tolerance
• Maximum dropout voltage (VI - V0) 400 mV over the operating temperature range
• Adjustable output voltage starting from 0.8 V
• Very fast transient response (up to 10 MHz bandwidth)
• Excellent line and load regulation specifications
• Logic-controlled shutdown option
• Thermal shutdown and current limit protection
• Junction temperature range: - 25 °C to 125 °C