A Product Line of Diodes Incorporated AZ2940 1A ULTRA LOW DROPOUT LINEAR REGULATOR Description Features The AZ2940 is a low dropout three-terminal regulator with a typical Minimum Guaranteed Output Current: 1A dropout of 280mV at 1A output current. Dropout Voltage at I = 1A: 280mV Typ. (Except 1.2V and 1.8V OUT Versions) The AZ2940 provides current limit and thermal shutdown. On-chip Output Accuracy: 1% thermal shutdown provides protection against any combination of high Low Ground Current current and ambient temperature that would create excessive junction Internal Current Limit and Thermal Protection temperatures. Reversed-battery and Reversed-lead Insertion Protection Fast Transient Response The AZ2940 has 1.2V, 1.8V, 2.5V, 3.3V and 5.0V versions. TO-220-3, TO-263-3, TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) Lead-Free Finish RoHS Compliant (Notes 1 & 2) The AZ2940 series is available in the industry standard TO-220-3, Available in Green Packages: TO-220-3, TO-220F-3, TO-263-3, TO-220F-3, TO-263-3, TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) and TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) and SOT-223 SOT-223 power packages. (Detailed information please refer to Lead-Free Finish RoHS Compliant (Notes 1 & 2) pages 13, 14) Halogen and Antimony Free. Green Device (Note 3) Applications LCD TV Set Top Box LCD Monitor SMPS Post Regulator Laptop, Palmtop and Notebook Portable Instrumentation USB Power Supply Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See A Product Line of Diodes Incorporated AZ2940 Pin Assignments (Cont.) (Top View) (Top View) (Top View) V 3 V 3 OUT OUT 3 V OUT GND 2 GND 2 2 GND V 1 IN 1 1 V V IN IN TO-263-3 TO-252-2 (3) (Option 1) TO-252-2 (3) (Option 2) (Top View) (Top View) (Top View) 3 V 3 V OUT 3 OUT V OUT 2 2 2 GND GND GND 1 V 1 V 1 IN IN V IN TO-252-2 (4) TO-252-2 (5) SOT-223 Typical Applications Circuit (Note 4) 1 3 V V V IN OUT IN V OUT AZ2940 + + C C GND OUT IN 2 Note 4: C is required if regulator is located far from power supply filter and is recommended to be 0.47F or greater. To maintain stability, C is recommended IN OUT to be 2.2F or greater. The ESR of this capacitor is critical, please see curve. Pin Description Pin Number Pin Name Function V 1 IN Unregulated Input 2 GND Ground pin. This pin and TAB are internally connected 3 V Regulated Output OUT 2 of 29 AZ2940 June 2015 Diodes Incorporated www.diodes.com Document number: DS37880 Rev. 3 - 2