View l4920 datasheet:

L4920 L4921 VERY LOW DROP ADJUSTABLE REGULATORS .VERY LOW DROP VOLTAGE .ADJUSTABLE OUTPUT VOLTAGE FROM 1.25V TO 20V .400mA OUTPUT CURRENT .LOW QUIESCENT CURRENT .REVERSE VOLTAGE PROTECTION .+60/ -60V TRANSIENT PEAK VOLTAGE Pentawatt PROTECTION .SHORT CIRCUIT PROTECTION WITH FOLD- BACK CHARACTERISTICS .THERMAL SHUT-DOWN DESCRIPTION The L4920 and L4921 are adjustable voltage regu- Minidip (4 + 4) lators with a very low voltage drop (0.4Vtyp. at 0.4A T = 25°C), low quiescent current and comprehen- j sive on-chip protection. ORDERING NUMBERS : L4920 (Pentawatt) These devices are protected againstload dumpand L4921 (Minidip) field decay transients, polarity reversal and over heating. A foldbackcurrent limiter protectsagainstload short These regulators are designed fo