UTC317
L I NEAR I NTEGRATED CI RCUI
T
3-TERMINAL 1A POSITIVE ADJUSTABLE VOLTAGE REGULATOR
DESCRIPTION
The UTC317
is an adjustable 3-terminal positive
voltage regulator designed to supply more than 1.5A of output current with voltage adjustable from 1.3V to 37V
FEATURES
*Output current up to 1.5A
*Output voltage adjustable from 1.3V to 37V *Internal short circuit protection
*Internal over temperature protection
*Safe-Area compensation for output transistor
TO-220
1
1:ADJ;2:OUTPUT;3:INPUT
BLOCK DIAGRAM
VAdj
ABSOLUTE MAXIMUN RATINGS Ta=25°C,UNLESS OTHERWISE SPECIFIED
PARAMETERS
SYMBOL
RATING
UNITS
Input -Output Voltage Difference V I -V O 40V
Lead Temperature T LEAD 230°C
Power Dissipation
P D Internal limited
ü
Operating Temperature Range T OPR 0~+125°C Storage Temperature Range
T STG
-65~+150
°C
Tel:400 660 8382
UTC317
L I NEAR I NTEGRATED CI RCUI T
ELECTRICAL CHARACTERISTICS
V I -V O =5V,0°C <Tj<125°C,I O =500mA,I MAX =1.5A,P MAX =20W ,unless otherwise specified
Parameter
Symbol Test conditions
Min Typ
Max
Unit
Line Regulation
∆V O
Ta=25°C,3V ≤V I -V O ≤40V 0.010.04%/V
Ta=0ü125°C,3V ≤V I -V O ≤40V
0.020.07Ta=25°C
V O ≤6V 1825mV Load Regulation ∆V O 10mA ≤I O ≤I MAX V O ≤5V 0.40.5%/V O 10mA ≤I O ≤I MAX
V O ≤5V 4070mV V O ≤6V另克
0.8 1.5%/V O Adjustable Pin current I ADJ 46100µA Adjustable Pin Current
Change ∆IADJ 2.5V ≤V I -V O ≤40V,10mA ≤Io ≤I MAX ,P D ≤P MAX
2.0
5µA Reference Voltage V REF 3V ≤V I -V O ≤40V,10mA ≤I O ≤I MAX ,P D ≤PMAX
1.20
1.25 1.30
V Temperature Stability STT 0.7%/V O
Minimum Load Current
for regulation I L(MIN)V I -V O =40V 3.510
mA Maximum output
电脑美甲机
Current
I O(MAX)
V I -V O ≤15V,P D ≤P MAX 1.5 2.2A
V I -V O ≤15V,P D ≤P MAX ,Ta=25°C
0.15
0.4RMS Noise v.s.%of Vout eN T A =25°C,10H Z ≤f ≤10KH Z 0.0030.01%/V O Ripple Rejection RR V O =10V,f=120HZ,C ADJ =060
dB
V O =10V,f=120HZ,C ADJ =10µF
人体红外
感应器66
75Long-term Stability,
T J =T HIGH ST T A =25°C,1000hr
0.31
%
Junction to Case Thermal Resistance
R θJC
5
°C /W
Note:Testing with low duty pulse should be used to avoid heating effect.
Tel:400 660 8382
UTC317
L I NEAR I NTEGRATED CI RCUI T
TYPICAL CHARACTERISTICS PERFORMANCE
Temperature O u t p u t V o l t a g e D e v i a t i o n
Fig.1.Load Regulation vs
temperature
sent协议
-50
-250255075100125
3540
45
50
55
60
Fig.2Adjustment Current vs Temperature
A d j u s t m e n t C u r r e n t
Temperature
Fig.3.Dropout Voltage vs Input-Temperature I n p u t -O u t p u t V o l t a g e D i
f f e r e n c e
R e f e r e n c e V o l t a g e
Temperature
TYPICAL APPLICATION CIRCUITS
微生物添加剂
Fig.5Programmable voltage regulator
Fig.6Regulator with On-off control
Vo=1.25V*(1+R2/R1)+Iadj*R2
C1is required when regulator is located an appreciated distance from power supply.Co is needed to improve transient response.
Tel:400 660 8382
UTC317
L I NEAR I NTEGRATED CI RCUI T
Iomax=(Vref R1)+Iadj=1.25V
R1
Iomin=(
Vref
R1+R2)+Iadj=
1.25V R1+R2
5mA<Io<100mA
Fig.7Soft start application
Fig.8Constant current application
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