TC4949 Просмотр технического описания (PDF) - TelCom Semiconductor Inc => Microchip
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TC4949 Datasheet PDF : 9 Pages
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Multifunction Very Low Dropout Voltage Regulator
TC4949
ELECTRICAL CHARACTERISTICS: (VCC = 14V, -40°C < TJ < 125°C, unless otherwise specified)
Symbol Parameter
Test Conditions
Min
Typ
Max
SENSE
VSOTH
VSOTH,HYS
VSOL
Sense Low Threshold
Sense Threshold Hysteresis
Sense Output Low Voltage
ISOH
Sense Output Leakage
ISI
Sense Input Current
PREREGULATOR
VZ
Preregulator Output Voltage
VSI Decreasing = 1.5V to 1.0V)
VSI ≤ 1.16V, VCC ≥ 3.0V,
RSO = 10kΩ to VOUT
VSO = 5.0V, VSI ≥ 1.5V
IZ = I0µA
1.16
1.23
1.35
20
100
200
–
–
0.4
–
–
1.0
1.0
0.1
1.0
–
6.3
–
PIN DESCRIPTION
Pin
Symbol
1
VCC
2
SIN
3
VZ
4
CT
5
GND
6
RESET
7
SOUT
8
VOUT
Description
Supply Voltage
Input of Sense Comparator
Output of Preregulator
Reset Delay Capacitor
Ground
Output of Reset Comparator
Output of Sense Comparator
Main Regulator Output
Units
V
mV
V
µA
µA
V
TYPICAL CHARACTERISTICS
Figure 1. Output Voltage versus
Junction Temperature
5.04
VCC = 14V
IOUT = 1.0mA
5.02
5.0
4.98
4.96
-40
-20 0 20 40 60 80 100 120
TJ, JUNCTION TEMPERATURE (˚C)
Figure 2. Output Voltage versus
Supply Temperature
6.0
TJ = 25°C
5.0
4.0
RL = 5.0k
3.0
RL = 100Ω
2.0
1.0
0
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10
VCC, SUPPLY VOLTAGE (V)
TC4949-1 1/6/00
3
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