3.3 VOLT ULTRA LOW DROPOUT ZLDO330 REGULATOR ISSUE 2 - MAY 1997 DEVICE DESCRIPTION The ZLDO Series low dropout linear FEATURES regulators operate with an exceptionally low dropout voltage, typically only 30mV Very low dropout voltage with a load current of 100mA. The regulator 6mV dropout at 10mA output series features output voltages in the range 2.7 to 18 volts, this device provides an output 30mV dropout at 100mA output voltage of 3.3 volts. 100mV dropout at 300mA output The ZLDO330 consumes a typical quiescent 3.3 volt fixed output current of only 560A and is rated to supply Other voltages available load currents up to 300mA. A battery low flag Low quiescent current is available to indicate potential power fail situations. If the input voltage falls to within 1mA quiescent (typ) at 300mA output 300mV of the regulated output voltage then Low battery flag the error output pulls low. The device also Shutdown control features an active high disable control. Once disabled the ZLDO quiescent current falls to Surface mount package typically 11A. The ZLDO devices are packaged in Zetex APPLICATIONS SM8 8 pin small outline surface mount package, ideal for applications where space Battery powered devices saving is important. The device low dropout Portable instruments voltage, low quiescent current and small size make it ideal for low power and battery Portable communications powered applications. Battery powered Laptop/Palmtop computers circuits can make particular use of the low Electronic organisers battery flag and shutdown features. Low Battery Flag Vin LOW BATTERY COMPARATOR THERMAL SHUTDOWN Vo OUTPUT DRIVE BIAS Shutdown Control CIRCUIT Cs SHUTDOWN BANDGAP REFERENCE Shaping Gnd 4-62ZLDO330 ABSOLUTE MAXIMUM RATING Input Supply Output Current 300mA Voltage Range -0.3 to 20V Operating Temperature -40 to 85C Shutdown Input Storage Temperature -55 to 150C Voltage Range -0.3 to Vin Power Dissipation Low Battery Output (Tamb=25C) 2W (Note 1) Voltage Range -0.3 to 20V ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) T =25C,I =10mA,C =10pF,C =1F amb L s out Parameter SYMBOL CONDITIONS MIN. TYP. MAX. UNITS Output voltage V V =4.3V 3.2 3.3 3.4 V o in Output voltage V V =4.3V 100 250 ppm/C o in temperature coefficient (Note 2, Note 4) T Line regulation V V =4.3 to 20V 15 52 mV o in Load regulation I =10 to 300mA 45 78 mV V o L V =4.3V in Dropout voltage V -V I =10mA 6 10 mV in o L (Note3) I =100mA 30 75 L I =300mA 100 200 L Quiescent current I V =4.3V, I =0 0.56 1 mA q in L Quiescent current I V =4.3V, I =0, 11 30 A qs in L at shutdown V =V shdn in Shutdown control I V =V =4.3V 2 10 A ins shdn in input current Shutdown control V V =4.3V ts in threshold voltage low(on) 0.4 V high(off) 1.5 Output current in I V =20V 50 100 nA Ls in shutdown mode V =Gnd o (Note4) Output noise voltage e V =4.3V 190 V RMS n in (Note4) f=10Hz to100kHz, I =100mA L Low battery detect V V + V + V in(bld) out out threshold 0.2V 0.4V Low battery flag V I =100A, 0.16 0.4 V bl bl output voltage V <V +200mV in o Low battery flag I V =6V, 0.1 1 A bl bl leakage current V >V +400mV in o 4-63