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Details, datasheet, quote on part number:LM317T
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Datasheet text preview:
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LM317
3-Ter minal Positive Adjustable Regulator
Features
· · · · · · Output Current In Excess of 1. 5A Output Adjustable Between 1. 2V and 37V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe Operating Area Compensation TO-220 Package
Description
This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5A of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shut-down and safe area compensation.
TO-220
1
1. Adj 2. Output 3. Input
Internal Block Diagram
InVun 3 pit
+ Prote ction Circuitry
Volta ge Re fe re nce
Rl imit
2 Vo
Output
1 VAd jj ad
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
LM317
Absolute Maximum Ratings
Parameter Input-Output Voltage Differential Lead Temperature Power Dissipation Operating Junction Temperature Range Storage Temperature Range Temperature Coefficient of Output Voltage Symbol V I - VO TLEAD PD Tj TSTG Vo/T Value 40 230 Internally limited 0 ~ +125 -65 ~+125 ±0.02 Unit V °C W °C °C %/°C
Electrical Characteristics
(VI-VO=5V, IO= 0.5A, 0°C TJ + 125°C, IMAX = 1.5A, PDMAX = 20W, unless otherwise specified) Parameter Line Regulation (Note1) Symbol Rline Conditions TA = +25°C 3V VI - VO 40V 3V VI - VO 40V TA = +25°C, 10mA IO IMAX VO< 5V VO 5V 10mA IO IMAX VO < 5V VO 5V 3V VI - VO 40V 10mA IO IMAX PD PMAX 3V VIN - VO 40V 10mA IO IMAX PD PMAX VI - VO = 40V VI - VO 15V, PD PMAX VI - VO 40V, PD PMAX TA=25°C TA= +25°C, 10Hz f 10KHz VO = 10V, f = 120Hz without CADJ CADJ = 10µF (Note2) TA = +25°C for end point measurements, 1000HR Min Typ. 0.01 0.02 18 0.4 40 0.8 46 2 .0 1.25 0 .7 3 .5 2.2 0.3 0.003 60 75 0 .3 5 Max. 0.04 0.07 25 0.5 70 1.5 100 5 1.30 12 0.01 1 Unit %/V %/V mV% / V O
Load Regulation (Note1)
Rload
1.20 1.0 66 -
mV% / V O µA µA V % / VO mA A % / VO dB % °C / W
Adjustable Pin Current Adjustable Pin Current Change Reference Voltage Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current RMS Noise, % of VOUT Ripple Rejection Long-Term Stability, TJ = THIGH Thermal Resistance Junction to Case
IADJ IADJ VREF STT IL(MIN) IO(MAX) eN RR ST RJC
Note: 1. Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must be taken into account separately. Pulse testing with low duty is used. (PMAX = 20W) 2. CADJ, when used, is connected between the adjustment pin and ground.
2
LM317
Typical Perfomance Characteristics
OUTPUT VOLTAGE DEVIATION(%)
TEMPERATURE (°C)
ADJUSTMENT CURRENT(uA)
TEMPERATURE (°C)
Figure 1. Load Regulation
Figure 2. Adjustment Current
INPUT-OUTPUT DIFFERENTIAL(V)
REFERENCE VOLTAGE(V)
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 3. Dropout Voltage
Figure 4. Reference Voltage
3
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