Microchip | MIC39301-1.8WU

The MIC39301-1.8WU is a 3.0 A low-dropout linear voltage regulators that provide a low voltage, high-current output with a minimum of external components. Utilizing Micrel?s proprietary Super ?eta PNP? pass element, the MIC39300/1/2 offers extremely low dropout (typically 385 mV at 3.0 A) and low ground current (typically 36 mA at 3.0 A).

The MIC39301-1.8WU is ideal for PC add-in cards that need to convert from standard 3.3 V to 2.5 V or 2.5 V to 1.8 V. A guaranteed maximum dropout voltage of 500 mV over all operating conditions allows the MIC39300/1/2 to provide 2.5 V from a supply as low as 3 V, and 1.8 V from a supply as low as 2.5 V. The MIC39300/1/2 also has fast transient response for heavy switching applications. The device requires only 47?F of output capacitance to maintain stability and achieve fast transient response.

The MIC39301 offers a TTL-logic compatible enable pin and an error flag that indicates under voltage and over current conditions. Offered in fixed voltages, the MIC39300/1 comes in the TO-220 and TO-263 (D2Pak) packages and is an ideal upgrade to older, NPN-based linear voltage regulators.

Key Features :

• 3.0 A minimum guaranteed output current
• 550 mV maximum dropout voltage over temperature
• Ideal for 3.0 V to 2.5 V conversion
• Ideal for 2.5 V to 1.8 V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery protection
• Reversed-leakage protection
• Fast transient response
• TO-263 (D2Pak) and TO-220 packaging
• TTL/CMOS compatible enable pin (MIC39301/2 only)
• Error flag output (MIC39301 only)
• Adjustable output (MIC39302 only)

Applications :

• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Multimedia and PC processor supplies
• Low-voltage microcontrollers
• StrongARM™ processor supply