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L4938E

STMicroelectronics
Part Number L4938E
Manufacturer STMicroelectronics
Description ADVANCED VOLTAGE REGULATOR
Published Mar 22, 2005
Detailed Description ® L4938E/ED L4938EPD ADVANCED VOLTAGE REGULATOR ENABLE AND SENSE INPUTS (EN, SI) PROTECTED AGAINST NEGATIVE TRANSIENTS...
Datasheet PDF File L4938E PDF File

L4938E
L4938E

Overview
® L4938E/ED L4938EPD ADVANCED VOLTAGE REGULATOR ENABLE AND SENSE INPUTS (EN, SI) PROTECTED AGAINST NEGATIVE TRANSIENTS DOWN TO -5V RESET THRESHOLD ADJUSTABLE FROM 3.
8 TO 4.
7V EXTREMELY LOW QUIESCENT CURRENT, 65µA (LESS THAN 90µA) IN STANDBY MODE OPERATING DC SUPPLY VOLTAGE RANGE 5V - 28V OPERATING TRANSIENT SUPPLY VOLTAGE UP TO 40V HIGH PRECISION STANDBY OUTPUT VOLTAGE 5V ± 1% WITH 100mA CURRENT CAPABILITY OUTPUT 2 VOLTAGE 5V ± 2% WITH 400mA CURRENT CAPABILITY (ADJ WIRED TO VOUT2) OUTPUT 2 VOLTAGE ADJUSTABLE BY EXTERNAL VOLTAGE DIVIDER OUTPUT 2 DISABLE FUNCTION FOR STANDBY MODE PIN CONNECTIONS DIP (12+2+2) SO20 (12+4+4) PowerSO20 ORDERING NUMBERS: L4938E (DIP) L4938ED (SO) L4938EPD (PSO) DESCRIPTION The L4938E/ED/EPD is a monolithic integrated dual voltage regulator with two very low dropout outputs and additional functions as power-on reset and input voltage sense.
It is designed for supplying the microcomputer controlled systems especially in automotive applications.
PR 1 2 3 4 5 6 7 8 9 10 D94AT076A 20 19 18 17 16 15 14 13 12 11 SI VS1 VS2 GND GND GND GND N.
C.
OUT2 ADJ PR CT EN GND GND RES SO OUT1 1 2 3 4 5 6 7 8 D94AT075A 16 15 14 13 12 11 10 9 SI VS1 VS2 GND GND N.
C.
OUT2 ADJ GND N.
C.
VS2 VS1 SI PR CT EN N.
C.
GND 1 2 3 4 5 6 7 8 9 10 L4938EPD 20 19 18 17 16 15 14 13 12 11 GND N.
C.
OUT2 ADJ OUT1 SO RESET N.
C.
N.
C.
GND CT EN GND GND GND GND RES SO OUT1 DIP (12+2+2) SO (12+4+4) PowerSO20 February 1999 1/12 L4938E - L4938ED - L4938EPD ABSOLUTE MAXIMUM RATINGS Symbol VINDC V INTR IO VSI ISI V EN IEN VRES , VSO IRES , ISO PO Tstg Tj TJSD Parameter DC Operating Supply Voltage Transient Operating Supply Voltage (T < 400ms) Output Current Sense Input Voltage (Voltage Forced) (note 2) Sense Input Current (Current Forced) (note 2) Enable Input Voltage (Voltage Forced) (note 2) Sense Input Current (Current Forced) (note 2) Output Voltages Output Currents (Output Low) Power Dissipation at Tamb = 80°C (note 3) Powerdip 12+2+2 Storage Temperature Ope...


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