L4979, L4979D, L4979D013TR, L4979MD, L4979MD013TR

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L4979D L4979MD
LOW DROP VOLTAGE REGULATOR
1

FEATURES
OPERATING DC SUPPLY VOLTAGE RANGE 5.6V TO 31V LOW QUIESCENT CURRENT (6uA Typ. @ 25 C with Enable Low) HIGH PRECISION OUTPUT VOLTAGE (2%) LOW DROPOUT VOLTAGE LESS THAN 0.5V RESET CIRCUIT SENSING THE OUTPUT VOLTAGE DOWN TO 1V PROGRAMMABLE RESET PULSE DELAY WITH EXTERNAL CAPACITOR WATCHDOG PROGRAMMABLE WATCHDOG TIMER WITH EXTERNAL CAPACITOR THERMAL SHUTDOWN AND SHORT CIRCUIT PROTECTION AUTOMOTIVE TEMPERATURE RANGE (Tj = -40 C TO 150 C) ENABLE INPUT FOR ENABLING/DISABLING THE VOLTAGE REGULATOR OUTPUT

Figure 1. Packages

SO-8

SO-20

Table 1. Order Codes
Part Number L4979D L4979MD L4979D013TR L4979MD013TR Package SO-8 SO-20 SO-8 in Tape & Reel SO-20 in Tape & Reel

Figure 2. Block Diagram

Vi

Vs

5V, 150 mA Vo Co

Vcw Ctw watchdog Wi Voltage reference

gnd

En Res

Vcr Ctr

reset

February 2006

Rev. 6 1/10

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L4979 DATASHEET