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L49

  

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Manufacturer Part no Description View
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L497 2A STEP DOWN SWITCHING REGULATOR
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4916 VOLTAGE REGULATOR PLUS FILTER

DESCRIPTION
This circuit combines both a filter and a voltage regulator in order to provide a high ripple rejection over a wider input voltage range. A supervisor low-pass loop of the element prevents
the output transistor from saturation at low input volt ages. The non linear behaviour of this control circuitry allows a fast settling of the filter.

.FIXED OUTPUT VOLTAGE 8.5 V
.250 mA OUTPUT CURRENT
.HIGH RIPPLE REJECTION
.HIGH LOAD REGULATION
.HIGH LINE REGULATION
.SHORT CIRCUIT PROTECTION
.THERMAL SHUT DOWN WITH HYSTERESIS
.DUMP PROTECTION

ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4952 VOLTAGE REGULATOR FOR CAR RADIO APPLICATIONS

DESCRIPTION
The L4952 is a monolithic voltage regulator in an advanced BCD60II process with high efficient p-channel transistor. This device is optimized for Car Radio applications to obtain optimum per formance and supply system integration with high flexibility and minimum peripheral components.

■ OPERATION SUPPLY VOLTAGE 9.5 TO 28V
■ PEAK SUPPLY OVERVOLTAGE PULSE UP TO 52V (VS. GND)
■ FIXED OUTPUT VOLTAGE OF 8.6 ± 0.2V AND OUTPUT CURRENT UP TO 150mA
■ VERY LOW DROP OUTPUT STAGE WITH LOW OUTPUT VOLTAGE DIAGNOSTIC
■ OUTPUT SHORT CIRCUIT AND THERMAL OVERLOAD PROTECTION
■ VERY LOW STANDBY CURRENT (DEVICE DISABLED)
■ TWO INTERNAL OUTPUT VOLTAGE SWITCHES WITH LOW DROPOUT FOR AM/FM SWITCHING
■ DRIVER CIRCUIT FOR EXTERNAL HIGH SIDE SWITCH WITH DROP MONITORING
■ ENABLE INPUT TO SWITCH ON THE DEVICE
■ ADDITIONAL 10V VERY LOW DROP REGULATOR TO SUPPLY THE VARICAP

 


other parts : L4952D 
ON-Semiconductor
ON-SemiconductorON-Semiconductor
L4949 100 mA, 5.0 V, Low Dropout Voltage Regulator with Power−On Reset

The L4949 is a monolithic integrated 5.0 V voltage regulator with a very low dropout and additional functions such as power−on reset and input voltage sense.
It is designed for supplying the micro−computer controlled systems especially in automotive applications.

Features
• Operating DC Supply Voltage Range 5.0 V to 28 V
• Transient Supply Voltage Up to 40 V
• Extremely Low Quiescent Current in Standby Mode
• High Precision Standby Output Voltage 5.0 V ±1%
• Output Current Capability Up to 100 mA
• Very Low Dropout Voltage Less Than 0.4 V
• Reset Circuit Sensing The Output Voltage
• Programmable Reset Pulse Delay With External Capacitor
• Voltage Sense Comparator
• Thermal Shutdown and Short Circuit Protections
• NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
• Pb−Free Packages are Available

 


other parts : L4949D L4949DG L4949DR2 L4949DR2G L4949N L4949NG NCV4949 NCV4949DG NCV4949DR2 NCV4949DR2G 
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4957 UP TO 4A ULDO LINEAR REGULATOR

DESCRIPTION
The L4957 devices are Ultra Low Drop Output lin ear regulators with an internal N-channel MOS of 200mΩ particulary suitable for low voltage/low dropout applications. Operating with a input voltage from 3V to 6.5V they are capable to deliver up to 4A at 1.5V or 2.5V fixed output voltages.

1.5V AND 2.5V FIXED OUTPUT VOLTAGE
3V TO 6.5V INPUT VOLTAGE RANGE
200mΩ Rdson TYPICAL @ Tj = 125°C
0.6V max. DROP-OUT AT 2A
EXCELLENT LOAD REGULATION
0.6mA QUIESCENT CURRENT AT ANY LOAD
SHORT CIRCUIT PROTECTION WITH FOLD BACK
THERMAL SHUTDOWN

APPLICATIONS
MOTHER BOARDS
PROCESSOR I/O & SUPPLIES
LOW VOLTAGE MEMORY & CHIP SET SUPPLIES
GRAPHIC & SOUND CARDS
LOW VOLTAGE LOGIC SUPPLIES
POST REGULATOR FOR SMPS


other parts : L4957D1.5 L4957D15 L4957D2.5 L4957D25 L4957V1.5 L4957V15 L4957V2.5 L4957V25 
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4960 2.5A POWER SWITCHING REGULATOR

DESCRIPTION
The L4960 is a monolithic power switching regulator delivering 2.5A at a voltage variable from 5V to 40V in step down configuration.


other parts : L4960H 
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4948 QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET

DESCRIPTION
The L4946B is a quad output low drop voltage regulator. The four outputs are a low drop 10V at 125mA (VO1), a 8.5V at 250mA (VO2), a 5V at 200mA (VO3) and a low drop 5V st-by line at 100mA (VO4).
The IC includes a monitoring circuit to warn if a low voltage or no voltage condition is occurring. VO1,2,3 are off during st-by mode.
The STCAP pin allows the battery voltage to decay slowly giving the µP time to store data. This IC is designed for supplying microcomputer controlled systems specially in automotive applications.

■ 4 OUTPUTS: 10V (125mA); 8.5V (250mA); 5V (200mA); 5V (100mA)
■ 10V AND 5V (100mA) OUTPUT ARE LOW DROP
■ 5V (100mA) ST-BY OUTPUT VOLTAGE
■ EARLY WARNING OUTPUT FOR SUPPLY UNDERVOLTAGE (LVW)
■ THERMAL SHUTDOWN AND CURRENT LIMITATION (FOLDBACK)
■ REVERSE BATTERY AND LOAD DUMP PROTECTION
■ INHIBIT (ON/OFF) AND RESET FUNCTIONS

 


other parts : L4946B 
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4947 5V-0.5A VERY LOW DROP REGULATOR WITH RESET

DESCRIPTION
The L4947/L4947R is a monolithic integrated circuit in Pentawatt package specially designed to provide a stabilized supply voltage for automotive and industrial electronic systems. Thanks to its very low voltage drop, in automotive applications the L4947/L4947R can work correctly even during the cranking phase, when the battery voltage could fall as low as 6V. Furthermore, it incorporates a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car. The reset function makes the device particularly suited to supply microprocessor based systems : a signal is available (after an externally programmable delay) to reset the microprocessor at power-on phase ; at power-off, this signal becomes low inhibiting the microprocessor.

■ PRECISE OUTPUT VOLTAGE (5V ± 4%) OVER FULL TEMPERATURE RANGE (– 40 / 125 °C)
■ VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL T RANGE
■ OUTPUT CURRENT UP TO 500mA
■ RESET FUNCTION
■ POWER-ON RESET DELAY PULSE DEFINED BY THE EXTERNAL CAPACITOR
■ + 80V LOAD DUMP PROTECTION
■ – 80V LOAD DUMP PROTECTION
■ REVERSE VOLTAGE PROTECTION
■ SHORT CIRCUIT PROTECTION AND THER MAL SHUT-DOWN (with hysteresis)
■ LOW START UP CURRENT

 


other parts : L4947R 
ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4945 5V VERY LOW DROP VOLTAGE REGULATOR

DESCRIPTION
The L4945 is a monolithic integrated circuit in Versawatt package specially designed to provide a stabilized supply voltage for automotive and in dustrial electronic systems. Thanks to their very low voltage drop, in automotive applications the devices can work correctly even during the cranking phase, when the battery voltage could fall as low as 6V. Furthermore, they incorporate a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car.

■ 5V ± 4% PRECISE OUTPUT VOLTAGE OVER FULL TEMPERATURE RANGE (– 40 / 125 °C)
■ VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL TEMPERATURE RANGE
■ OUTPUT CURRENT UP TO 500mA
■ OVERVOLTAGE AND REVERSE VOLTAGE PROTECTIONS
■ REVERSE VOLTAGE PROTECTION
■ SHORT CIRCUIT PROTECTION AND THERMAL SHUT-DOWN (with hysteresis)
■ LOW START UP CURRENT

 

ST-Microelectronics
ST-MicroelectronicsST-Microelectronics
L4989 Low power voltage regulator

Features
■ Operating DC supply voltage range 5.6V to 31V
■ Very low quiescent current with watchdog disabled
■ Precision output voltage (3%)
■ Low drop voltage (180mV typ ai Io=150mA)
■ Reset circuit sensing the output voltage down to 1V
■ Programmable reset delay with external capacitor
■ Watchdog disable input
■ Programmable watchdog timer with external capacitor
■ Thermal shutdown and short circuit protection
■ Wide temperature range (Tj = -40°C to 150°C)
 

 


other parts : L4989D L4989D013TR L4989MD L4989MD013TR 

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