US1205

US1205 300 mA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR PRELIMINARY DATASHEET FEATURES SOT23 package Stable with 2.2uF ceramic capacitor 1% Voltage Reference Accuracy Only 270mV Dropout at 300 mA 170mV Dropout at 150mA 10nA Quiescent Current in Shutdown Current Limit and Thermal Shutdown Logic input Enable pin DESCRIPTION The US1205 device is an efficient linear voltage regulator with better than 1% initial voltage accuracy, very low dropout voltage and very low ground current designed especially for hand held, battery powered applications. Other features of the device are; TTL compatible enable/ shutdown control input, current limiting and thermal shutdown. The US1205 is available in fixed and adjustable output voltage versions in a small SOT23-5 package. APPLICATIONS Laptop, Notebook & Palmtop computers Battery powered Equipments PCMCIA Vcc & Vpp regulator Concumer Electronics High Efficiency Linear Power Supplies TYPICAL APPLICATION Vin C1 2.2uF 1 2 3 Vin Vout 5 R1 C2 2.2uF Vout Gnd R2 Vo=1.242 X (1+R1/R2) S.D. Enable En Adj 4 1205app1-1.1 Typical application of the US1205 ajustable. 3.3V C1 2.2uF 1 2 3 Vin Vout 5 C2 2.2uF 2.5V Gnd S.D. Enable En Byp 4 C3 1000pF 1205app2-1.2 Typical application of the US1205 Fixed voltage. PACKAGE ORDER INFORMATION Tj (°C) 0 TO 125 0 TO 125 0 TO 125 0 TO 125 0 TO 125 Rev. 1.4 9/25/00 5 LEAD SOT 23 US1205CL US1205-25CL US1205-30CL US1205-33CL US1205-36CL SOT23 Marking AT00 AT25 AT30 AT33 AT36 Output Voltag...