FAN1112SX ON Semiconductor

www.fairchildsemi.com FAN1112 1A 1.2V Low Dropout Linear Regulator Features Description Low dropout voltage The FAN1112 is a 1.2V low dropout three-terminal Load regulation: 0.05% typical regulator with 1A output current capability. The device has Trimmed current limit been optimized for low voltage where transient response and On-chip thermal limiting minimum input voltage are critical. Standard SOT-223 and TO-252 packages Three-terminal xed 1.2V Current limit is trimmed to ensure specied output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and Applications ambient temperatures that would create excessive junction Post regulator for switching supplies temperatures. Supply for low-voltage processors Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the FAN1112 ows into the load, increasing efciency. The FAN1112 regulator is available in the industry-standard SOT-223 and TO-252 (DPAK) power packages. Typical Application FAN1112 V = 3.3V V V 1.2V at 1A IN IN OUT ++ 10 F 22 F GND REV. 1.0.1 9/27/01 PRODUCT SPECIFICATION FAN1112 Pin Assignments Front View Tab is V OUT Front View 3 IN Tab is 1 23 2 OUT V OUT 1 GND GND OUT IN 4-Lead Plastic SOT-223 3-Lead Plastic TO-252 = 15C/W* = 3C/W* JC JC *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane., can vary from JA 30C/W to more than 50C/W. Other mounting techniques may provide better thermal resistance than 30C/W. Absolute Maximum Ratings Parameter Min. Max. Unit V 18 V IN (V V ) * I See Figure 1 IN OUT OUT Operating Junction Temperature Range 0 125 C Storage Temperature Range -65 150 C Lead Temperature (Soldering, 10 sec.) 300 C 1.2 1.0 0.8 0.6 0.4 0.2 0 062 4 8 10 12 14 16 18 20 V V (V) IN OUT Figure 1. Absolute Maximum Safe Operating Area 2 REV. 1.0.1 9/27/01 I (A) OUT