Microchip | MIC39100-1.8WS

The MIC39100-1.8WS is a 1 A low-dropout linear voltage regulator that provide low-voltage, high-current output from an extremely small package. Utilizing Micrel’s proprietary Super beta PNP™ pass element, the MIC39100/1/2 offers extremely low dropout (typically 410 mV at 1 A) and low ground current (typically 11 mA at 1 A).

The MIC39100-1.8WS is a fixed output regulator offered in the SOT-223 package. The MIC39101 and MIC39102 are fixed and adjustable regulators, respectively, in a thermally enhanced power 8-lead SOP (small outline package).

The MIC39100/1/2 is ideal for PC add-in cards that need to convert from standard 5 V to 3.3 V, 3.3 V to 2.5 V or 2.5 V to 1.8 V. A guaranteed maximum dropout voltage of 630 mV over all operating conditions allows the MIC39100/1/2 to provide 2.5 V from a supply as low as 3.13 V and 1.8 V from a supply as low as 2.43 V.

The MIC39100/1/2 is fully protected with over current limiting, thermal shutdown, and reversed-battery protection. Fixed voltages of 5.0 V, 3.3 V, 2.5 V, and 1.8 V are available on MIC39100/1 with adjustable output voltages to 1.24 V on MIC39102.

Key Features :

• Fixed and adjustable output voltages to 1.24 V
• 410 mV typical dropout at 1 A
• Ideal for 3.0 V to 2.5 V conversion
• Ideal for 2.5 V to 1.8 V conversion
• 1 A minimum guaranteed output current
• 1% initial accuracy
• Low ground current
• Current limiting and thermal shutdown
• Reversed-battery protection
• Reversed-leakage protection
• Fast transient response
• Low-profile SOT-223 package
• Power SO-8 package

Applications :

• LDO linear regulator for PC add-in cards
• PowerPC™ power supplies
• High-efficiency linear power supplies
• SMPS post regulator
• Multimedia and PC processor supplies
• Battery chargers
• Low-voltage microcontrollers and digital logic