MIC37100/37101/37102 1A Low-Voltage Cap LDO General Description Features The MIC37100, MIC37101, and MIC37102 are 1A low- Fixed and adjustable output voltages to 1.24V dropout, linear voltage regulators that provide low-voltage, Cap Regulator, 10F ceramic output capacitor stable high-current output from an extremely small package. 280mV typical dropout at 1A Utilizing Micrels proprietary Super eta PNP pass Ideal for 3.0V to 2.5V conversion element, the MIC37100/01/02 offers extremely low dropout Ideal for 2.5V to 1.8V, 1.65V or 1.5V conversion (typically 280mV at 1A) and low ground current (typically 1A minimum guaranteed output current 11mA at 1A). 1% initial accuracy The MIC37100 is a xed output regulator offered in the SOT-223 package. The MIC37101 and MIC37102 are Low ground current xed and adjustable regulators, respectively, in a thermally Current limiting and thermal shutdown enhanced power 8-pin SOIC (small outline package) and Reversed-leakage protection the SOT-223 package. The MIC37102 is also available in Fast transient response the S-PAK power package, for applications that require Low-prole SOT-223 package higher power dissipation or higher operating ambient Power SO-8 package temperatures. S-PAK package (MIC37102 only) 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 Applications voltage of 500mV over all operating conditions allows the MIC37100/01/02 to provide 2.5V from a supply as low as LDO linear regulator for PC add-in cards 3V and 1.8V from a supply as low as 2.3V. PowerPC power supplies The MIC37100/01/02 is fully protected with overcurrent High-efciency linear power supplies limiting and thermal shutdown. Fixed output voltages of SMPS post regulator 1.5V, 1.65V, 1.8V, 2.5V and 3.3V are available on Multimedia and PC processor supplies MIC37100/01 with adjustable output voltages to 1.24V on Battery chargers MIC37102. Low-voltage microcontrollers and digital logic Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Typical Application Dropout vs. Output Current 350 2.5V MIC37100 300 OUT V IN IN OUT 2.5V 250 3.3V 200 3.3V 10F OUT GND 150 ceramic 100 50 0 2.5V/1A Regulator 0 0.25 0.5 0.75 1 OUTPUT CURRENT (A) Super eta PNP is a registered trademark of Micrel, Inc. PowerPC is a registered trademark of IBM Corporation Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC37100/37101/37102 Ordering Information Part Number Voltage Temperature Range Package Standard Pb-Free / RoHS Compliant MIC37100-1.5BS MIC37100-1.5WS* 1.5V 40 to +125C SOT-223 MIC37100-1.65BS MIC37100-1.65WS* 1.65V 40 to +125C SOT-223 MIC37100-1.8BS MIC37100-1.8WS* 1.8V 40 to +125C SOT-223 MIC37100-2.5BS MIC37100-2.5WS* 2.5V 40 to +125C SOT-223 MIC37100-3.3BS MIC37100-3.3WS* 3.3V 40 to +125C SOT-223 MIC37101-1.5BM MIC37101-1.5YM 1.5V 40 to +125C 8-Pin SOIC MIC37101-1.65BM MIC37101-1.65YM 1.65V 40 to +125C 8-Pin SOIC MIC37101-1.8BM MIC37101-1.8YM 1.8V 40 to +125C 8-Pin SOIC Contact Factory MIC37101-2.1YM 2.1V 40 to +125C 8-Pin SOIC MIC37101-2.5BM MIC37101-2.5YM 2.5V 40 to +125C 8-Pin SOIC MIC37101-3.3BM MIC37101-3.3YM 3.3V 40 to +125C 8-Pin SOIC MIC37102BM MIC37102YM Adj. 40 to +125C 8-Pin SOIC MIC37102BR MIC37102WR* Adj. 40 to +125C 5-Pin S-PAK * RoHS compliant with high-melting solder exemption. Pin Configuration GND 5 ADJ TAB 4 OUT 3 GND 2IN 1EN 132 IN GND OUT SOT-223 (S) 5-Pin S-PAK (R) MIC37100-x.x (Fixed) MIC37102 (Adjustable) EN 1 8 GND EN 1 8 GND IN 2 7 GND IN 2 7 GND OUT 3 6 GND OUT 3 6 GND FLG 4 5 GND ADJ 4 5 GND 8-Pin SOIC 8-Pin SOIC MIC37101-x.x (Fixed) MIC37102 (Adjustable) M9999-090607 September 2007 2 TAB