L4936NH ,DUAL MULTIFUNCTION VOLTAGE REGULATORELECTRICAL CHARACTERISTICS (VS = 14V; –40°C unless otherwise specified)Symbol Parameter Test Condit ..
L4937N ,DUAL MULTIFUNCTION VOLTAGE REGULATORELECTRICAL CHARACTERISTICS (V = 14V; –40°C ≤ T ≤ 125°C unless otherwise specified)S jSymbol Paramet ..
L4937NL ,DUAL MULTIFUNCTION VOLTAGE REGULATOR®L4937NDUAL MULTIFUNCTION VOLTAGE REGULATOR. STANDBY OUTPUT VOLTAGE PRECISION 5V± 2%.OUTPUT 2 TRACK ..
L4937NL ,DUAL MULTIFUNCTION VOLTAGE REGULATORELECTRICAL CHARACTERISTICS (V = 14V; –40°C ≤ T ≤ 125°C unless otherwise specified)S jSymbol Paramet ..
L4938E ,ADVANCED VOLTAGE REGULATORapplications.PIN CONNECTIONSPR 1 20 SIGND 1 20 GNDPR 1 16 SICT 2 19 VS1N.C. 2 19 N.C.CT 2 15 VS1EN ..
L4938ED ,ADVANCED VOLTAGE REGULATORL4938E/EDL4938EPD®ADVANCED VOLTAGE REGULATORENABLE AND SENSE INPUTS (EN, SI) PRO-TECTED AGAINST NEG ..
LBA120 , Dual Single-Pole OptoMOS Relay
LBA120 , Dual Single-Pole OptoMOS Relay
LBA120 , Dual Single-Pole OptoMOS Relay
LBA120. , Dual Single-Pole OptoMOS Relay
LBA120PTR , Dual Single-Pole OptoMOS Relay
LBA673 , Lead (Pb) Free Product - RoHS Compliant
L4936N-L4936NH
DUAL MULTIFUNCTION VOLTAGE REGULATOR
936N/NHJune 2000
DUAL MULTIFUNCTION VOLTAGE REGULATOR STANDBY OUTPUT VOLTAGE PRECISION 5V
± 2%. OUTPUT 2 TRACKED TO THE STANDBY OUT-
PUT. OUTPUT 2 DISABLE FUNCTION FOR
STANDBY MODE. VERY LOW QUIESCENT CURRENT, LESS
THAN 250μA, IN STANDBY MODE. OUTPUT 2 VOLTAGE SETTABLE FROM 5 TO
20V. OUTPUT CURRENTS : I01 = 50mA, I02 = 500mA. VERY LOW DROPOUT (max 0.4V/0.6V). OPERATING TRANSIENT SUPPLY VOLTAGE
UP TO 40V. POWER-ON RESET CIRCUIT SENSING THE
STANDBY OUTPUT VOLTAGE. POWER-ON RESET DELAY PULSE DEFINED
BY THE EXTERNAL CAPACITOR. EARLY WARNING OUTPUT FOR SUPPLY UN-
DERVOLTAGE. THERMAL SHUTDOWN AND SHORT CIRCUIT
PROTECTIONS
DESCRIPTIONTheL4936N/NH are monolithic integrated dual volt-
age regulators with two very low dropout outputs
and additional functions such as power-on reset and
input voltage sense. They are designed for supply-
ing microcomputer controlled systems specially in
automotive applications.
PIN CONNECTION (top view)1/11
BLOCK DIAGRAM
THERMAL DATANote: VS1, VS2, SI pins are rated at 1500V versus positive ESD according to human body model; other pins are rated at 2000V.
L4936N/NH2/11
ABSOLUTE MAXIMUM RATINGS
APPLICATION CIRCUIT
Note : The circuit is ESD protected according to MIL–STD–883C.
L4936N/NH3/11
ELECTRICAL CHARACTERISTICS (VS = 14V; –40°C unless otherwise specified)ENABLE
L4936N/NH4/11
FUNCTIONAL DESCRIPTIONThe L4936N/NH are based on the SGS-THOMSON
Microelectronics modular voltage regulator ap-
proach. Several out-standing features and auxiliary
functions are provided to meet the requirements of
supplying the microprocessor systems used in auto-
motive applications.
Furthermore the device is suitable also in other ap-
plications requiring two stabilized voltages.
The modular approach allows other features and
functions to be realized easily when required.
STANDBY REGULATOR
The standby regulator uses an Isolated Collector
Vertical PNP transistor as the regulating element.
This structure allows a very low dropout voltage at
currents up to 50mA. The dropout operation of the
standby regulator is maintained down to 2V input
supply voltage. The output voltage is regulated up
to the transient input supply voltage of 40V. This fea-
ture avoids functional interruptions which could be
generated by overvoltage pulses.
The typical curve of the standby output voltage as a
function of the input supply voltage is shown in fig. 1.
The current consumption of the device (quiescent
current) is less than 250μA when output 2 is dis-
abled (standby mode). The dropout voltage is con-
trolled to reduce the quiescent current peak in the
undervoltage region and to improve the transient
response in this region.
The quiescent current is shown in fig. 2 as a function
of the supply input voltage 2.
OUTPUT 2 VOLTAGE
The output 2 regulator uses the same output struc-
ture as the standby regulator, but rated for an output
current of 500mA.
The output 2 regulator works in tracking mode with
the standby output voltage as a reference voltage
when the output 2 programming pin ADJ is con-
nected to VO2. By connecting a resistor divider R1,
R2 to the pin ADJ as shown in fig. 3, the output volt-
age 2 can be programmed to the value :
VO2 = VO1 (1 + R1/R2)
The output 2 regulator can be switched off via the
Enable input.
Note : 1 : VO2 connected to ADJ.VO2 can be set to higher values by inserting an external resistor divider.
2 : Foldback characteristic
ELECTRICAL CHARACTERISTICS (continued)RESET
SENSE
L4936N/NH5/11
Figure 2 : Quiescent Current vs. Supply Voltage.
Figure 3 : Programmable Output 2 Voltage with External Resistors.
Figure 1 : Output Voltage vs. Input Voltage.
L4936N/NH6/11
