MIC47300

MIC47300 3A, Low Voltage, Adjustable LDO Regulator with Dual Input Supply General Description The MIC47300 is a high-bandwidth, low-dropout, 3A voltage regulator ideal for powering core voltages of lowpower microprocessors. The MIC47300 implements a dual supply configuration allowing for very low output impedance and very fast transient response. The MIC47300 requires a bias input supply between 3V and 6.5V for proper operation. The main input supply rail operates from 1.4V to 6.5V that allows for adjustable output voltages down to 0.9V. The MIC47300 requires a minimum of 1µF output capacitance for stability, and optimal operation is achieved with small ceramic capacitors. The MIC47300 is available in a 5-pin power D-Pak package (TO-252) with an operating temperature range of –40°C to +125°C. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features Input Voltage Range: – VIN: 1.4V to 6.5V – VBIAS: 3.0V to 6.5V Stable with 1µF ceramic capacitor ±1% initial tolerance Maximum dropout voltage (VIN–VOUT) of 400mV over temperature Adjustable output voltage down to 0.9V Ultra fast transient response (Up to 10MHz bandwidth) Excellent line and load regulation specifications Power D-Pak package (TO-252) Thermal shutdown and current-limit protection 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 ...