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L49

  

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L497 [HALL EFFECT PICKUP IGNITION CONTROLLER ]

other parts : L497B  L497D1 

ST-Microelectronics
STMicroelectronics

DESCRIPTION
The L497is an integrated electronic ignition controller for breakerless ignition systems using Hall effect sensors.
The device drives an NPN external darlington to control the coil current providing the required stored energy with low dissipation.
A special feature of the L497 is the programmable time for the recovery of the correct dwell ratio Td/T when the coil peak current fails to reach 94 % of the nominal value. In this way only one spark may have an energy less than 94 % of the nominal one during fast acceleration or cold starts.

■ DIRECT DRIVING OF THE EXTERNAL POWER DARLINGTON
■ COIL CURRENT CHARGING ANGLE (dwell) CONTROL
■ PROGRAMMECOIL CURRENT PEAKLIMITATION
■ PROGRAMMABLE DWELL RECOVERY TIME WHEN 94 % NOMINAL CURRENT NOT REACHED
■ RPM OUTPUT
■ PERMANENT CONDUCTION PROTECTION
■ OVERVOLTAGE PROTECTION FOR EXTERNAL DARLINGTON
■ INTERNAL SUPPLY ZENER
■ REVERSE BATTERY PROTECTION

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L49A [Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988) ]

other parts : 2987AIM5.0  2987IM3.0  2987IM3.3  2987IM5.0  2988AIM3.3  2988AIM5.0  2988IM5.0 

Texas-Instruments
Texas Instruments

DESCRIPTION
The LP2987/8 are fixed-output 200 mA precision LDO voltage regulators with power-ON reset delay which can be implemented using a single external capacitor.
The LP2988 is specifically designed for noise-critical applications. A single external capacitor connected to the Bypass pin reduces regulator output noise.

FEATURES
• Ultra Low Dropout Voltage
• Power-ON Reset Delay Requires Only One
   Component
• Bypass Pin for Reduced Output Noise
   (LP2988)
• Specified Continuous Output Current 200 mA
• Specified Peak Output Current > 250 mA
• SOIC-8 and VSSOP-8 Surface Mount Packages
• <2 μA Quiescent Current when Shutdown
• Low Ground Pin Current at All Loads
• 0.5% Output Voltage Accuracy (“A” Grade)
• Wide Supply Voltage Range (16V Max)
• Overtemperature/overcurrent Protection
• −40°C to +125°C Junction Temperature Range

APPLICATIONS
• Cellular Phone
• Palmtop/Laptop Computer
• Camcorder, Personal Stereo, Camera

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L49A [Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988) ]

other parts : 2987AIM5.0  2987IM3.0  2987IM3.3  2987IM5.0  2988AIM3.3  2988AIM5.0  2988IM5.0 

TI
Texas Instruments

DESCRIPTION
The LP2987/8 are fixed-output 200 mA precision LDO voltage regulators with power-ON reset delay which can be implemented using a single external capacitor.
The LP2988 is specifically designed for noise-critical applications. A single external capacitor connected to the Bypass pin reduces regulator output noise.

FEATURES
• Ultra Low Dropout Voltage
• Power-ON Reset Delay Requires Only One
   Component
• Bypass Pin for Reduced Output Noise
   (LP2988)
• Specified Continuous Output Current 200 mA
• Specified Peak Output Current > 250 mA
• SOIC-8 and VSSOP-8 Surface Mount Packages
• <2 μA Quiescent Current when Shutdown
• Low Ground Pin Current at All Loads
• 0.5% Output Voltage Accuracy (“A” Grade)
• Wide Supply Voltage Range (16V Max)
• Overtemperature/overcurrent Protection
• −40°C to +125°C Junction Temperature Range

APPLICATIONS
• Cellular Phone
• Palmtop/Laptop Computer
• Camcorder, Personal Stereo, Camera

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L4949 [100 mA, 5.0 V, Low Dropout Voltage Regulator with Power−On Reset ]

other parts : L4949D  L4949DG  L4949DR2  L4949DR2G  L4949N  L4949NG  NCV4949 

ON-Semiconductor
ON Semiconductor

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

 

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L4960 [2.5A POWER SWITCHING REGULATOR ]

other parts : L4960H 

ST-Microelectronics
STMicroelectronics

DESCRIPTION
The L4960 is a monolithic power switching regulator delivering 2.5A at a voltage variable from 5V to 40V in step down configuration.
Features of the device include current limiting, soft start, thermal protection and 0 to 100% duty cycle for continuous operation mode.
TheL4960 is mountedina Heptawattplastic power package and requires very few external components.
Efficient operation at switching frequencies up to 150KHz allows a reduction in the size and cost of external filter components.

■ 2.5A OUTPUT CURRENT
■ 5.1V TO 40V OPUTPUT VOLTAGE RANGE
■ PRECISE (± 2%) ON-CHIP REFERENCE
■ HIGH SWITCHING FREQUENCY
■ VERY HIGH EFFICIENCY (UP TO 90%)
■ VERY FEW EXTERNAL COMPONENTS
■ SOFT START
■ INTERNAL LIMITING CURRENT
■ THERMAL SHUTDOWN

 

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L4920 [VERY LOW DROP ADJUSTABLE REGULATORS ]

other parts : L4921 

ST-Microelectronics
STMicroelectronics

DESCRIPTION
The L4920 and L4921 are adjustable voltage regulator swith a very low voltage drop(0.4V typ.at 0.4A Tj = 25°C), low quiescent current and comprehensive on-chip protection.
These devices are protected against load dump and field decay transients, polarity reversal and over heating.
A foldback current limiter protects against load short circuits.
The output voltage is adjustable through an external divider from 1.25V to 20V. The minimum operating input voltage is 5.2V (TJ = 25°C).

. 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 PROTECTION
. SHORT CIRCUIT PROTECTION WITH FOLD BACK CHARACTERISTICS
. THERMAL SHUT-DOWN

 

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L4959 [MULTIFUNCTION VOLTAGE REGULATOR FOR HOME AUDIO ] ST-Microelectronics
STMicroelectronics

DESCRIPTION
The L4959 is a monolithic Multifunction Voltage Regulator, designed mainly for supplying Home Audio systems. The L4959 contains one unswitched linear 5.6V regulator for Micro, two switched regulators 8.6V and 12V, suitable to feed CD or CD players and LED, Signal Process. An additional 12V regulator for Solenoid Motor an CD_TRAY Driven is also available.

■ OUTPUTS:
   12V (1.3A); 12V (0.8A); 8.6V (0.6A); 5.6V (0.25A) STANDBY
■ OUT1 12V(a), OUT2 12V(b) AND OUT3 8.6V WITH INDEPENDENT ENABLE CONTROL FOR STAND-BY MODE
■ SHORT-CIRCUIT PROTECTION TO GROUND
■ THERMAL SHUTDOWN

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L4918 [VOLTAGE REGULATORS PLUS FILTER ] ST-Microelectronics
STMicroelectronics

DESCRIPTION
The L4918 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 voltages. The non linear behaviour of this control circuitry allows a fast setting of the filter.

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

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L4943 [MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO ] ST-Microelectronics
STMicroelectronics

DESCRIPTION
The L4943 contains a triple voltage regulator and a high side driver. In stand-by the output is active as long as possible even when in thermal shutdown or under any other fault conditions. The STCAP pin allows the use of a reserve supply capacitor that will hold enough energy for the 5V Stand-by line to allow the µP to store data.

■ 3 PROGRAMMABLE OUTPUTS:
   ♦ 3 TO 11V (500mA);
   ♦ 3 TO 11V (500mA);
   ♦ 3 TO 7V (500mA) STANDBY
■ OUT1 AND OUT2 WITH INDEPENDENT ENABLE CONTROL FOR STAND-BY MODE
■ 0.4A HIGH SIDE DRIVER
■ LOAD DUMP PROTECTION
■ THERMAL SHUTDOWN

 

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L4949 [MULTIFUNCTION VERY LOW DROPOUT VOLTAGE REGULATOR ]

other parts : L4949D  L4949N 

Motorola
Motorola => Freescale

Μultifunction Very Low Dropout Voltage Regulator

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.

• 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

 

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