Datasheet LM217M, LM317M Datasheet (ST)

查询LM217M供应商

1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR

■ OUTPUTVOLTAGERANGE : 1.2 TO37V

■ OUTPUTCURRENT IN EXCESSOF 500 mA

■ LINEREGULATION TYP.0.01%

■ LOADREGULATIONTYP. 0.1%

■ THERMALOVERLOADPROTECTION

■ SHORTCIRCUIT PROTECTION

■ OUTPUTTRANSISTORSAFEAREA

COMPENSATION

■ FLOATINGOPERATIONFOR HIGH

VOLTAGEAPPLICATIONS

DESCRIPTION

The LM217M/LM317M are monolithic integrated
circuits in TO-220,DPAK, SOT-82 and SOT-194
packages intended for use as positive adjustable
voltageregulators.
They are designedto supply until 500 mAof load
current with an output voltage adjustable over a

1.2 to 37V range.
The nominal output voltage is selectedby means
of only a resistive divider, making the device
exceptionally easy to use and eliminating the
stockingof many fixed regulators.

LM217M
LM317M

MEDIUM CURRENT

TO-220

SOT-82 SOT-194

DPAK

TO-252

SCHEMATICDIAGRAM

September 1997

1/11

LM217M/LM317M

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

(*) Re-Boot is not guaranteed for Tj≥ 85oC

THERMAL DATA

Symbol Parameter SOT-82

R

thj-case

R

thj-amb

PINCONNECTION AND ORDERING NUMBERS

Input-Output Differential Voltage 40 V

i-Vo

P

Power Dissipation Internally Limited

d

Operating Junction Temperature Range (*) forLM217M

opr

forLM317M

T

StorageTemperature Range -55 to 150

stg

-40 to 125
0to125

TO-220 Unit

SOT-194

DPAK

ThermalResistance Junction-case Max
ThermalResistance Junction-ambient Max

8

100

TO-220 SOT-82

50

3

o

C/W

o

C/W

o

C

o

C

o

C

DPAK SOT-194

Type TO-220 DPAK SOT-82 SOT-194

LM217M LM217MT LM217 M DT LM217MX LM217 M S
LM317M LM317MT LM317 M DT LM317MX LM317 M S

TEST CIRCUIT

2/11

LM217M/LM317M

ELECTRICALCHARACTERISTICS FOR LM217M (Refer to the test circuits, -40 ≤ Tj≤ 125oC

V

(*) CADJ is connected between Adjust pinand Ground.

= 5 V, Io= 100 mA, Pd≤ 7.5W, unlessotherwisespecified)

i-Vo

Symbol Parameter Test Conditions Min. Typ. Max. Unit

LineRegulation Vi-Vo= 3 to40 V Tj=25oC 0.01 0.02 %/V

∆V

o

0.02 0.05 %/V

LoadRegulation Vo≤ 5V

∆V

o

I

Adjustment Pin Current 50 100 µA

ADJ

∆I

V

I

o(min)

I

o(max)

Adjustment Pin Current Vi-Vo= 3 to40 V

ADJ

Reference Voltage Vi-Vo= 3 to40 V

REF

∆

V

OutputVoltage Temperature

o

Stability

V

o

Minimum LoadCurrent Vi-Vo=40V 3.5 5 mA
Maximum OutputCurrent Vi-Vo≤15V

OutputNoise Voltage

e

N

(percentance of V

)

O

SVR Supply Voltage Rejection (*) T

=10mA to 500 mA

I

o

≥ 5V

V

o

=10mA to 500 mA

I

o

=10mA to 500 mA

I

o

=10mA to 500 mA

I

o

=40V, Pd<P

V

i-Vo

B = 10Hzto 10KHz
Tj=25oC

=25oC

j

f = 120Hz

T

T

dMAX,Tj

C

=25oC515mV

j

20 50 mV

=25oC 0.1 0.3 % /V

j

0.3 1 %/V

0.2 5 µ A

1.2 1.25 1.3 V

0.7 %

500 1000

=25oC

200

0.003 %

C

=0 65 dB

ADJ

=10µF66 80 dB

ADJ

o
o

mA

ELECTRICALCHARACTERISTICS FOR LM317M (Refer to the test circuits, 0 ≤ Tj≤ 125oC
V

= 5 V, Io= 100 mA, Pd≤ 7.5W, unlessotherwisespecified)

i-Vo

Symbol Parameter Test Conditions Min. Typ. Max. Unit

LineRegulation Vi-Vo= 3 to40 V Tj=25oC 0.01 0.04 %/V

∆V

o

0.02 0.07 %/V

LoadRegulation Vo≤ 5V

∆V

o

I

Adjustment Pin Current 50 100 µA

ADJ

∆I

V

I

o(min)

I

o(max)

Adjustment Pin Current Vi-Vo= 3 to40 V

ADJ

ReferenceVoltage Vi-Vo= 3 to40 V

REF

∆

V

OutputVoltage Temperature

o

Stability

V

o

Minimum Load Current Vi-Vo=40V 3.5 10 mA
Maximum OutputCurrent Vi-Vo≤15V

OutputNoise Voltage

e

N

(percentance of V

)

O

SVR Supply Voltage Rejection (*) T

=10mA to 500 mA

I

o

≥ 5V

V

o

=10mA to 500 mA

I

o

=10mA to 500 mA

I

o

=10mA to 500 mA

I

o

=40V, Pd<P

V

i-Vo

B = 10Hzto 10KHz
Tj=25oC

=25oC

j

f = 120Hz

T

T

dMAX,Tj

C

=25oC525mV

j

20 70 mV

=25oC 0.1 0.5 % /V

j

0.3 1. 5 %/ V

0.2 5 µ A

1.2 1.25 1.3 V

0.7 %

500 1000

=25oC

200

0.003 %

C

=0 65 dB

ADJ

=10µF66 80 dB

ADJ

o
o

mA

(*) CADJ is connected between Adjust pinand Ground.

3/11

LM217M/LM317M

Figure1 : Current Limit Figure2 : MinimumOperatingCurrent

Figure3 : Basic AdjustableRegulator.

LM317M

Figure4 : ThermalResistance& MaximumPower Dissipationvs P.C.B. Copper Lenght for DPAK

Pdmax calculatedfor Ta=50oC

4/11

LM217M/LM317M

APPLICATIONINFORMATION

The LM317M provides an internal reference
voltage of 1.25V between the output and
adjustments terminals. This is used to set a
constant current flow across an external resistor
divider(see fig. 3), giving an output voltageV

R

V

O=VREF

(1+

R

2

) +I

1

ADJR2

of:

O

The device was designed to minimize the term

(100µA max) and to maintain it very constant

I

ADJ

with 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,
imposinga minimum load current condition. If the
load is insufficient,the output voltagewill rise.

Since the LM317M is a floating regulator and
”sees” only the input-to-outputdifferential voltage,
supplies of very high voltage with respect to
ground can be regulatedas long as themaximum
input-to-output differential is not exceeded.
Furthermore, programmable regulator are easily
obtainable and, by connecting a fixed resistor
between the adjustment and output, the device
canbe usedas a precisioncurrent regulator.

In order to optimise the load regulation, the
current set resistor R1 (see fig. 3) 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.

EXTERNALCAPACITORS(Fig.5)

Normally no capacitors are needed unless the
device is situated far from the input filter
capacitors; in which case an input bypass is
needed.

A 0.1µF disc or 1µF tantalium input bypass
capacitor (C

) is recommended to reduce the

I

sensitivityto input line impedance.
The adjustment terminal may be bypassed to

ground to improve ripple rejection. This capacitor

) prevents ripple from being amplified as the

(C

adj

output voltage is increased. A 10µF capacitor
should improve ripple rejection about 80dB at
120Hzan a 10V application.

Although the LM317M is stable with no output
capacitance like any feedback circuit, certain
values of external capacitance can cause
excessive ringing. An output capacitance (C

O

)in
the form of a 1µF tantalium or 25µF aluminium
electrolytic capacitor on the output swamps this
effect andinsuresstability.

PROTECTIONDIODES (Fig.5)

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
regulator.

Figure 5 show the LM317M with the
recommended protection diodes for output
voltages in excess of 25V or high capacitance
values (C
prevents C

>25µF, C2>10µF). Diode D1

3

from discharging through the IC

3

during an input short-circuit. The combination of
diodes D1 and D2 prevents C

from discarging

2

through the regulator during an input or output
short-circuit.

START-UPBLOCK

It’s not guaranteed the Re-Boot of the device
when the junctiontemperatureis over 85

o

C.

5/11

LM217M/LM317M

Figure5 : VoltageRegulatorwith ProtectionDiodes.

LM317M

Figure6 : Slow Turn-on 15V Regulator. Figure 7 : Current Regulator.

LM317M

LM317M

V

ref

I

=

o

+

R

1

I

ADJ

≈

1.25

R

V

1

Figure8 : 5V Electronic Shut-downRegulator. Figure9 : DigitallySelected Outputs.

LM317M

LM317M

(R2 sets maximum Vo)

6/11

TO-220 MECHANICALDATA

LM217M/LM317M

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 4.8 0.189
C 1.37 0.054
D 2.4 2.8 0.094 0.110

D1 1.2 1.35 0.047 0.053

E 0.35 0.55 0.014 0.022

F 0.61 0.94 0.024 0.037

F2 1.15 1.4 0.045 0.055

G 4.95 5.08 5.21 0.195 0.200 0.205

H2 10.4 0.409
H3 10.05 10.4 0.396 0.409

L2 16.2 0.638
L3 26.3 26.7 27.1 1.035 1.051 1.067
L5 2.6 3 0.102 0.118
L6 15.1 15.8 0.594 0.622
L7 6 6.6 0.236 0.260

Dia. 3.65 3.85 0.144 0.152

mm inch

P011D

7/11

LM217M/LM317M

TO-252 (DPAK) MECHANICAL DATA

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 2.2 2.4 0.086 0.094

A1 0.9 1.1 0.035 0.043
A2 0.03 0.23 0.001 0.009

B 0.64 0.9 0.025 0.035

B2 5.2 5.4 0.204 0.212

C 0.45 0.6 0.017 0.023

C2 0.48 0.6 0.019 0.023

D 6 6.2 0.236 0.244

E 6.4 6.6 0.252 0.260
G 4.4 4.6 0.173 0.181
H 9.35 10.1 0.368 0.397

L2 0.8 0.031
L4 0.6 1 0.023 0.039

8/11

H

A

E

C2

L2

B2

==

==

DETAIL”A”

D

2

13

L4

A1

C

A2

DETAIL”A”

B

G

==

0068772-B

SOT-82 MECHANICAL DATA

LM217M/LM317M

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 7.4 7.8 0.291 0.307

B 10.5 11.3 0.413 0.445

b 0.7 0.9 0.028 0.035

b1 0.49 0.75 0.019 0.030

C 2.4 2.7 0.04 0.106

c1 1.2 0.047

D 15.7 0.618

e 2.2 0.087

e3 4.4 0.173

F 3.8 0.150
H 2.54 0.100

mm inch

C

c1

b

b1

A

F

BD

H

e

e3

P032A

9/11

LM217M/LM317M

SOT-194 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 7.4 7.8 0.291 0.307

B 10.5 11.3 0.413 0.445

b 0.7 0.9 0.028 0.035

b1 0.49 0.75 0.019 0.030

C 2.4 2.7 0.094 0.106

c1 1.2 0.047
c2 1.3 0.051

D 6 0.236

e 2.2 0.087

e3 4.4 0.173

F 3.8 0.150
H 2.54 0.100

P 45 (typ.)

S 4 0.157

S1 2 0.079

T 0.1 0.004

mm inch

C

A

F

B

C1

H

D

b1

T

e

SS1

P

b

c2

e3

P032B

10/11

LM217M/LM317M

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consequences of use ofsuch informationnor for anyinfringement of patents or other rights of thirdparties whichmay results from its use. No
licenseis granted by implicationor otherwise underany patentorpatentrights ofSGS-THOMSON Microelectronics.Specifications mentioned
in this publication are subject tochange withoutnotice. This publication supersedesand replaces all informationpreviouslysupplied.
SGS-THOMSONMicroelectronicsproducts arenotauthorizedfor use ascriticalcomponents inlife support devices orsystemswithoutexpress
writtenapproval ofSGS-THOMSON Microelectonics.

 1997 SGS-THOMSONMicroelectronics- Printedin Italy - AllRights Reserved

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11/11