Microchip | MIC49300-1.2WR

The MIC49300-1.2WR is a high-bandwidth, low-dropout, 3.0 A voltage regulator ideal for powering core voltages of low-power microprocessors. The MIC49300 implements a dual supply configuration allowing for very low output impedance and very fast transient response.

The MIC49300 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 1.4 V to 6.5 V and the bias supply requires between 3 V and 6.5 V for proper operation. The MIC49300 offers fixed output voltages from 0.9 V to 1.8 V and adjustable output voltages down to 0.9 V.

The MIC49300 requires a minimum of output capacitance for stability, working optimally with small ceramic capacitors. The MIC49300 is available in a 5-pin S-Pak. It operates over a junction temperature range of –40°C to +125°C.

Features:

• Input Voltage Range:
• VIN: 1.4 V to 6.5 V
• VBIAS: 3.0 V to 6.5 V
• Stable with 1 µF ceramic capacitor
• ±1% initial tolerance
• Maximum dropout voltage (VIN-VOUT) of 500 mV over temperature
• Adjustable output voltage down to 0.9 V
• Ultra fast transient response (Up to 10 MHz bandwidth)
• Excellent line and load regulation specifications
• Logic controlled shutdown option
• Thermal shutdown and current limit protection
• Power S-Pak package
• Junction temperature range: –40°C to 125°C

Applications:

• Graphics processors
• PC Add-In Cards
• Microprocessor core voltage supply
• Low voltage digital ICs
• High Efficiency Linear power supplies
• SMPS post regulators