2024年2月27日发(作者：2015款科鲁兹经典版怎么样)
LM217MLM317MMedium current 1.2 to 37 V adjustable voltage regulatorFeatures■■■■■■■■Output voltage range: 1.2 to 37 VOutput current in excess of 500 mALine regulation typ. 0.01 %Load regulation typ. 0.1 %Thermal overload protectionShort circuit protectionOutput transition safe area compensationFloating operation for high voltage applicationsexceptionally easy to use and eliminating the
stocking of many fixed -220DPAKDescriptionThe LM217M/LM317M are monolithic integrated
circuits in TO-220 and DPAK packages intended
for use as positive adjustable voltage regulators.
They are designed to supply until 500 mA of load
current with an output voltage adjustable over a
1.2 to 37 V nominal output voltage is selected by means
of only a resistive divider, making the device
Table summaryOrder codesTO-220DPAK (tape and reel)LM217MDT-TRLM317MTLM317MDT-TRFebruary 2008Rev 71/21
ContentsLM217M - LM317MContents123456Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96.16.26.3External capacitors (Figure8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Protection diodes (Figure8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Start-up block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9789Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202/21
LM217M - LM317MDiagram1 DiagramFigure 1.
Schematic diagram3/21
Pin configurationLM217M - LM317M2
Figure 2.
Pin configuration
Pin connections (top view)TO-220DPAK4/21
LM217M - LM317MMaximum ratings3 Maximum ratings
Table VI-VOPDTOPTSTGAbsolute maximum ratingsParameterInput-output differential voltagePower dissipationOperating junction temperature range
(1)Storage temperature rangefor LM217Mfor LM317MValue40Internally limited-40 to 1250 to 125-55 to 150UnitVmW°C°-Boot is not guaranteed for TJ
≥
85° RthJCRthJAThermal dataParameterThermal resistance junction-caseThermal resistance junction-ambientTO-220350DPAK8100Unit°C/W°C/W
Figure 3.
Test circuit5/21
Electrical characteristicsLM217M - LM317M4 Electrical characteristics
Table ΔVOElectrical characteristics of LM217M (refer to the test circuits, TJ = - 40 to 125 °C,
VI - VO = 5 V, IO = 100 mA, PD
≤
7.5 W, unless otherwise specified)ParameterLine regulationTest conditionsVI
- VO = 3 to 40 VVO ≤ 5 VIO = 10 to 500mALoad regulationVO ≥ 5 VIO = 10 to 500mATJ = 25°.0.010.02TJ = 25°C520TJ = 25°C0.10.350VI
- VO = 3 to 40 V, IO = 10 to 500 mAVI
- VO = 3 to 40 V, IO = 10 to 500 mA1.20.21.250.7VI
- VO = 40 VVI
- VO ≤ 15 VVI
- VO = 40 V, Pd < PDMAX, TJ = 25°CB = 10 Hz to 100 kHz, TJ = 25°CTJ = 25°Cf = 120 HzCADJ = 0CADJ = 10 ?F665003.510002000.00365805Max.0.020.0515500.3110051.3Unit%/VmVΔVO%/VO?A?AV%mAmA%dBIADJΔIADJVREFΔVO/VOIO(min)IO(max)eNSVRAdjustment pin currentAdjustment pin currentReference voltageOutput voltage
temperature stabilityMinimum load currentMaximum output currentOutput noise voltage
(percentage of VO)Supply voltage rejection
(1) is connected between Adjust pin and Ground.
6/21
LM217M - LM317MTable ΔVOElectrical characteristicsElectrical characteristics of LM317M (refer to the test circuits, TJ = 0 to 125 °C,VI - VO = 5 V, IO = 100 mA, PD
≤
7.5 W, unless otherwise specified)ParameterLine regulationTest conditionsVI
- VO = 3 to 40 VVO ≤ 5 VIO = 10 to 500mALoad regulationVO ≥ 5 VIO = 10 to 500mATJ = 25°.0.010.02TJ = 25°C520TJ = 25°C0.10.350VI
- VO = 3 to 40 V, IO = 10 to 500 mAVI
- VO = 3 to 40 V, IO = 10 to 500 mA1.20.21.250.7VI
- VO = 40 VVI
- VO ≤ 15 VVI
- VO = 40 V, Pd < PDMAX, TJ = 25°CB = 10 Hz to 100 kHz, TJ = 25°CTJ = 25°Cf = 120 HzCADJ = 0CADJ = 10 ?F665003.510002000.003658010Max.0.040.0725700.51.510051.3Unit%/VmVΔVO%/VO?A?AV%mAmA%dBIADJΔIADJVREFΔVO/VOIO(min)IO(max)eNSVRAdjustment pin currentAdjustment pin currentReference voltageOutput voltage
temperature stabilityMinimum load currentMaximum output currentOutput noise voltage
(percentage of VO)Supply voltage rejection
(1) is connected between Adjust pin and Ground.7/21
Typical performanceLM217M - LM317M5 Typical performanceFigure 4.
Current limitFigure 5.
Minimum operating current
Figure 6.
Basic adjustable regulator
Figure 7.
Thermal resistance & maximum power dissipation vs P.C.B. copper length for DPAKNote:8/21Pdmax calculated for Ta = 50°C.
LM217M - LM317MApplication information6 Application informationThe LM217M/LM317M provide an internal reference voltage of 1.25 V between the output
and adjustment terminals. These devices are used to set a constant current flow across an
external resistor divider (see Figure6), giving an output voltage VO of: VO = VREF (1 + R2 /
R1) + IADJ
devices were designed to minimize the term IADJ
(100 ?A max) and to maintain it very
constant in line and load changes. Usually, the error term IADJ
× R2 can be neglected. To
obtain the previous requirement, all the regulator quiescent current is returned to the output
terminal, imposing a minimum load current condition. If the load is insufficient, the output
voltage will the LM217M/LM317M devices are floating regulators and \"see\" only the input-to-output differential voltage, supplies of very high voltage with respect to ground can be
regulated as long as the maximum input-to-output differential is not exceeded. Furthermore,
programmable regulators are easily obtained and, by connecting a fixed resistor between
the adjustment and output, the devices can be used as a precision current regulator. In
order to optimize the load regulation, the current set resistor R1 (see Figure6) should be
tied as close as possible to the regulator, while the ground terminal of R2 should be near the
ground of the load to provide remote ground sensing.6.1 External capacitors (Figure8)Normally no capacitors are needed unless the devices are situated far from the input filter
capacitors; in which case an input bypass is needed.A 0.1 ?F disc or 1 ?F tantalum input bypass capacitor (CI) is recommended to reduce the
sensitivity to input line adjustment terminal may be bypassed to ground to improve ripple rejection. This
capacitor (CADJ) prevents ripple from being amplified as the output voltage is increased. A
10 ?F capacitor should improve ripple rejection of about 80 dB at 120 Hz in a 10 V
gh the LM217M/LM317M devices are stable with no output capacitance like any
feedback circuit, certain values of external capacitance can cause excessive ringing. An
output capacitance (CO) in the form of a 1 ?F tantalum or 25 ?F aluminium electrolytic
capacitor on the output swamps this effect and insures stability.6.2 Protection diodes (Figure8)When external capacitors are used with any IC regulator it is sometimes necessary to add
protection diodes to prevent the capacitors from discharging through low current points into
the 6 shows the LM217M/LM317M with the recommended protection diodes for output
voltages in excess of 25 V or high capacitance values (C3 > 25 ?F, C2
> 10 ?F). Diode D1
prevents C3 from discharging through the IC during an input short-circuit. The combination
of diodes D1 and D2 prevents C2 from discharging through the regulator during an input or
output short-circuit.6.3 Start-up blockIt’s not guaranteed the Re-Boot of the device when the junction temperature is over 85 °C.9/21
Application circuitsLM217M - LM317M7 Application circuits
Figure 8.
Voltage regulator with protection diodesFigure 9.
Slow turn-on 15 V regulatorFigure t regulator
IO=VREF/R1 +
IADJ
= 1.25V/R110/21
LM217M - LM317M
Figure 11.5 V electronic shut-down regulator
Application circuits
Figure lly selected outputs
(R2 = sets maximum VO)11/21
Package mechanical dataLM217M - LM317M8 Package mechanical dataIn order to meet environmental requirements, ST offers these devices in ECOPACK?
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: .12/21
LM217M - LM317M
Package mechanical dataTO-220 mechanical .0.1810.0510.107P011C13/21
Package mechanical dataLM217M - LM317MFigure g dimension DPAK (type STD-ST)
0068772/G14/21
LM217M - LM317MPackage mechanical dataFigure g dimension DPAK (type FUJITSU-Subcon.)
0068772/G15/21
Package mechanical dataLM217M - LM317MFigure g dimension DPAK (type IDS-Subcon.)
0068772/G16/21
LM217M - LM317MPackage mechanical dataTable mechanical datatype STD-STtype .2.401.100.230.905.400.600.606.205.106.404.702.284.409.351.002.800.800.600.200°8°0°1.001.030.700.408°0°1.130.904.6010.109.901.4010.301.602.236.60Min.2.250.9600.765.280.460.466.055.276.556.604.772.282.334.519.400.902.500.890.640.208°2.651.271.02Typ.2.30Max.2.351.060.100.865.380.560.566.155.476.656.354.702.284.6110.42Min.2.190.890.030.645.210.460.465.975.206.73type :The DPAK package coming from the two subcontractors (Fujitsu and IDS) are fully
compatible with the ST\'s package suggested footprint.17/21
Package mechanical dataLM217M - LM317MFigure footprint recommended data
Table int Gmm.6.706.701.83.01.602.302.30inch.0.2640.640.0700.1180.0630.0910.09118/21
LM217M - LM317MPackage mechanical dataTape & reel DPAK-PPAK mechanical .12.9920.519inch.19/21
Revision historyLM217M - LM317M9
Table vision history
Document revision historyRevision567ChangesThe document has been mechanical data updated, added footprint : Table1 on page1.21-Jun-200406-Dec-200611-Feb-200820/21
LM217M - LM317M
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