The L4946 is a quad output low drop voltage regulator. The four outputs are a low drop 10V at 125mA (VO1), a 8V 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); 8V (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
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
The L4941 is a three terminal 5V positive regulators available in TO-220, TO-220FP and D2PAK packages, making it useful in a wide range of industrial and consumer applications. Thanks to its very low input/output voltage drop, these devices are particularly suitable for battery powered equipments, reducing consumption and prolonging battery life. It employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection.
■ LOW DROPOUT VOLTAGE (450mV Typ. at 1A)
■ VERY LOW QUIESCENT CURRENT
■ THERMAL SHUTDOWN
■ SHORT CIRCUIT PROTECTION
■ REVERSE POLARITY PROTECTION
This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control. Based on a standard current mode PWM control ler this device includes some
The L4956 is an adjustable monolithic linear regulator designed to satisfy very heavy load transient and efficient power conversion from 3.3V to 1.26V and lower, up to 5A.
Designed in BCDII technology, it uses a charge pump technique to have a proper internal N-channel gate drive. The signal supply voltage input VSIG can operate from 4.5V up to an absolute of 7V and the power supply voltage input VPW can opearte from 3V min to an absolute of 7V. An RDSON of 150mV
The L4975A is a stepdown monolithic power switching regulator delivering 5A at a voltage variable from 5.1 to 40V.
Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times.