General Description
The MIC37100, MIC37101, and MIC37102 are 1A lowdropout, linear voltage regulators that provide low-voltage, high-current output from an extremely small package. Utilizing Micrel’s proprietary Super βeta PNP™ pass element, the MIC37100/01/02 offers extremely low dropout (typically 280mV at 1A) and low ground current (typically 11mA at 1A).
The MIC37100 is a fixed output regulator offered in the SOT-223 package. The MIC37101-1.5YM and MIC37102 are fixed and adjustable regulators, respectively, in a thermally enhanced power 8-lead SOIC (small outline package) and the SOT-223 package. The MIC37102 is also available in the SPAK power package, for applications that require higher power dissipation or higher operating ambient temperatures.
The MIC37100/01/02 is ideal for PC add-in cards that need to convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to 1.8V or lower. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the MIC37100/01/02 to provide 2.5V from a supply as low as 3V and 1.8V from a supply as low as 2.3V.
The MIC37100/01/02 is fully protected with overcurrent limiting and thermal shutdown. Fixed output voltages of 1.5V, 1.65V, 1.8V, 2.5V and 3.3V are available on MIC37100/01 with adjustable output voltages to 1.24V on MIC37102. For other voltages, contact Micrel.
Features
• Fixed and adjustable output voltages to 1.24V
• µCap Regulator, 10µF ceramic output capacitor stable
• 280mV typical dropout at 1A
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V, 1.65V or 1.5V conversion
• 1A minimum guaranteed output current
• 1% initial accuracy
• Low ground current
• Current limiting and thermal shutdown
• Reversed-leakage protection
• Fast transient response
• Low-profile SOT-223 package
• Power SO-8 package
• S-PAK package (MIC37102 only)
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
Feature
- Fixed and adjustable output voltages to 1.24V
- µCap Regulator, 10µF ceramic output capacitor stable
- 280mV typical dropout at 1A
- Ideal for 3.0V to 2.5V conversion
- Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion
- 1A minimum guaranteed output current
- 1% initial accuracy
- Low ground current
- Current limiting and thermal shutdown
- Reverse leakage protection
- Fast transient response
- Low-profile SOT-223 package
- Power SO-8 package
- S-PAK package (MIC37102 only)
(Picture: Pinout)
