UTCL2949E LINEAR INTEGRATED CIRCUIT
MULTIFUNCTION VERY LOW DROP VOLTAGE REGULATOR
DESCRIPTION
The UTC L2949E is a monol...
UTCL2949E LINEAR INTEGRATED CIRCUIT
MULTIFUNCTION VERY LOW DROP VOLTAGE
REGULATOR
DESCRIPTION
The UTC L2949E is a monolithic integrated 5V voltage
regulator with a very low dropout output and additonal functions as power-on reset and input voltage sense.It is designed for supplying the microcomputer controlled systems especially in automotive applications.
FEATURES
*Operating dc supply voltage range 5V to 28V. *Transient supply voltage up to 40V. *Extremely low quiescent current in standby mode. *High precision standby output voltage 5V±1% *Output current capability up to 100mA. *Very low dropout voltage less than 0.5V. *Reset circuit sensing the output voltage *Programmable reset pulse delay with external capacitor *Voltage sense comparator. *Thermal shutdown and short circuit protections.
PIN CONNECTIONS
DIP-8 SOP-8 SOP-20
VS 1 SI 2 Vz 3 CT 4
8 VOUT 7 SO 6 RES 5 GND
DIP-8/SOP-8
Vz CT N.C. GND GND GND GND N.C. N.C. RES
1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11
SOP-20
SI VS N.C. GND GND GND GND N.C. VOUT SO
UTC UNISONIC TECHNOLOGIES CO. LTD
1
QW-R102-014,A
UTC L2949E
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
Vz VOUT
CT
VS PRE
REGULATOR 5V
2μ +
REG SI
RESET VS
2V
REF
1.23V
SENSE
1.23V
RES
SO GND
ABSOLUTE MAXIMUM RATINGS
PARAMETER DC Operating Supply Voltage Transient Supply Voltage(T<1s) Output Current Output Voltage Output Voltage
Reset Output Sense Output Output Current Reset Output Sense Output Pre
regulator Output Voltage Pre
regulator Output ...