6 page
UTC78LXX
LINEAR INTEGRATED CIRCUIT
YOUW ANG ELECTRONICS CO.LTD
6
UTC78L24 ELECTRICAL CHARACTERISTICS
(VI=33V,Io=40mA,0<Tj<125
°C,C1=0.33µF,Co=0.1µF,unless otherwise specified)(Note 1)
Characteristic
Symbol
Test conditions
MIN
TYP
MAX
UNIT
Tj=25
°C
23
24
25
V
Output Voltage
VO
27V
≤VI≤38V,IO=1mA~40mA
22.8
25.2
V
27V
≤VI≤VMAX,
IO=1mA~70mA
22.8
25.2
V
(note 2)
Load Regulation
∆Vo
Tj=25
°C IO=1mA~100mA
40
200
mV
Tj=25
°C IO=1mA~0mA
20
100
mV
Line regulation
∆Vo
27V
≤VI≤38V,Tj=25°C
160
300
mV
28V
≤VI≤38V,Tj=25°C
150
250
mV
Quiescent Current
Iq
2.2
6.0
mA
Quiescent Current Change
∆Iq
27V
≤VI≤38V
1.5
mA
∆Iq
1mA
≤VI≤40mA
0.1
mA
Output Noise Voltage
VN
10Hz
≤f≤100kHz
200
µV
Temperature coefficient of Vo
∆Vo/∆T Io=5mA
-2.0
mV/
°C
Ripple Rejection
RR
27V
≤VI≤38V,f=120Hz,Tj=25°C
34
45
dB
Dropout Voltage
Vd
Tj=25
°C
1.7
V
Note 1: The Maximum steady state usable output current and input voltage are very dependent on the heating
sinking and/or lead temperature length of the package.The date above respresent pulse test conditions with
junction temperatures as indicated at the initiation of test.
Note 2:Power dissipation<0.75W
TYPICAL APPLICATION
UTC78LXX
1
2
3
C0
0.1
µF
C1
0.33
µF
Vi
Vo
Note 1: To specify an output voltage,substitue voltage value for "XX".
Note 2: Bypass capacitors are recommended for optimum stability and transient response and should be located
as close as possible to the regulators.
