SGS Thomson Microelectronics L4940V12, L4940V10, L4940D2T85, L4940D2T5, L4940D2T12 Datasheet



VERY LOW DROP 1.5 A REGULATORS

■ PRECISE5V, 8.5V, 10 V,12 V OUTPUTS

■ LOWDROPOUTVOLTAGE(500mV typ

at1.5A)

■ VERYLOW QUIESCENTCURRENT

■ THERMAL SHUTDOWN

■ SHORTCIRCUITPROTECTION

■ REVERSEPOLARITYPROTECTION

DESCRIPTION

The L4940 series of three terminal positive
regulators is available in TO-220 and D
package and with several fixed output voltages,
making it useful in a wide range of industrial and
consumer applications. Thanks to its very low
input/output voltage drop, these devices are
particularly suitable for battery powered
equipments, reducing consumption and
prolonging battery life. Each type employs
internal current limiting, antisaturation circuit,
thermalshut-down and safe area protection.

2

PAK

TO-220

L4940 series

2

PAK

D

TO-263

BLOCKDIAGRAM

November 1999

1/13

L4940 series

PIN CONNECTION AND ORDER CODES

ORDERING NUMBERS OUTPUT VOLTAGE

TO-220 D

L4940V5 L4940D2T 5 5V
L4940V85 L4940D2 T 85 8.5V
L4940V10 L4940D2 T 10 10V
L4940V12 L4940D2 T 12 12V

ABSOLUTE MAXIMUM RATING

2

PAK

Symbol Description Values Unit

V

ForwardInput Voltage 30 V

I

V

P

T

j,Tstg

Reverse Input Voltage

IR

OutputCurrent Internally Limited

I

O

PowerDissipation Internally Limited

tot

=5V RO=100

V

O

V

=8.5V RO= 180

O

=10V RO= 200

V

O

=12V RO= 240

V

O

Ω
Ω
Ω
Ω

Junctionand StorageTemperature -40 to 150

-15 V

THERMALDATA

Symbol Description Value Unit

2

PAK

3

62.5

o
o

R

thj-cas e

R

thj-amb

Thermal ResistanceJunction-case Max
Thermal ResistanceJunction-ambient Max

TO-220 D

3

50

o

C

C/W
C/W

2/13

TESTCIRCUITS
Figure1 : DC Parameter.

L4940 series

Figure2 :

Load Rejection.

Figure3 : Ripple Rejection.

3/13

L4940 series

ELECTRICAL CHARACTERISTICS FOR L4940V5

= 7V, Ci=0.1 µF, Co=22µF unless otherwisespecified)

V

i

(refer to the test circuits, T

=25oC,

j

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

OutputVoltage Io=500 mA 4.9 5 5.1 V

o

V

OutputVoltage Io=5 mA to 1500 mA

o

OperatingInput Voltage Io=5 mA 17 V

V

i

LineRegulation Io=5 mA Vi= 6 to 17V 4 10 mV

V

∆

o

LoadRegulation Io=5 to 1500 mA

V

∆

o

I

Quiescent Current Io=5mA

Q

Quiescent CurrentChange Io=5mA

I

∆

Q

OutputVoltageDrift 0.5 mV/oC

V

∆

o

∆

T

SVR Supply Voltage Rejection I

V

Dropout Voltage Io=0.5A

d

I

ShortCircuitCurrent Vi=14V

sc

= 6.5to 16 V

V

i

=500 to 1000 mA

I

o

=1.5A Vi= 6.5V

I

o

=1.5A Vi= 6.5to 16 V

I

o

=1 A f = 120 Hz 58 68 dB

o

=1.5A

I

o

= 6.5V

V

i

4.855.2V

8
5

5

30

25
15

8

50

3

15

200
500

2

2.2

400
900

2.7

2.9

mV

mA

mA

mV

A

ELECTRICAL CHARACTERISTICS FOR L4940V85(referto the test circuits,Tj=25oC,

= 10.5V,Ci= 0.1 µF, Co=22µF unlessotherwisespecified)

V

i

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

OutputVoltage Io=500 mA 8.3 8.5 8.7 V

o

V

OutputVoltage Io=5 mA to 1500 mA

o

OperatingInput Voltage Io=5 mA 17 V

V

i

LineRegulation Io=5 mA Vi= 9.5to 17 V 4 9 mV

V

∆

o

∆V

LoadRegulation Io=5 to 1500 mA

o

I

Quiescent Current Io=5mA

Q

Quiescent CurrentChange Io=5mA

I

∆

Q

OutputVoltageDrift 0.8 mV/oC

V

∆

o

T

∆

SVR Supply Voltage Rejection I

V

Dropout Voltage Io=0.5A

d

I

ShortCircuitCurrent Vi=14V

sc

= 10.2to 16V

V

i

I

=500 to 1000 mA

o

=1.5A Vi= 10.2V

I

o

=1.5A Vi= 10.2to16 V

I

o

=1 A f = 120 Hz 58 66 dB

o

=1.5A

I

o

= 10.2V

V

i

8.15 8.5 8.85 V

12

8
4

30

30
16

8

50

2.5
15

200
500

2

2.2

400
900

2.7

2.9

mV

mA

mA

mV

A

4/13

L4940 series

ELECTRICAL CHARACTERISTICS FOR L4940V10

= 12V, Ci= 0.1 µF, Co=22µF unless otherwisespecified)

V

i

(refer to the test circuits,T

=25oC,

j

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

OutputVoltage Io=500 mA 9.8 10 10.2 V

o

V

OutputVoltage Io=5 mA to 1500 mA

o

OperatingInput Voltage Io=5 mA 17 V

V

i

LineRegulation Io=5 mA Vi=11to17V 3 8 mV

V

∆

o

LoadRegulation Io=5 to 1500 mA

V

∆

o

I

Quiescent Current Io=5mA

Q

Quiescent CurrentChange Io=5mA

I

∆

Q

OutputVoltageDrift 1 mV/oC

V

∆

o

∆

T

SVR Supply Voltage Rejection I

V

Dropout Voltage Io=0.5A

d

I

ShortCircuitCurrent Vi=14V

sc

= 11.7to 16V

V

i

=500 to 1000 mA

I

o

=1.5A Vi= 11.7V

I

o

=1.5A Vi= 11.7to16 V

I

o

=1 A f = 120 Hz 56 62 dB

o

=1.5A

I

o

= 11.7V

V

i

9.6 10 10.4 V

15
10

4

30

35
20

8

50

2

13

200
500

2

2.2

400
900

2.7

2.9

mV

mA

mA

mV

A
A

ELECTRICAL CHARACTERISTICS FOR L4940V12(referto the test circuits,Tj=25oC,

= 14V, Ci= 0.1 µF, Co=22µF unless otherwisespecified)

V

i

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

OutputVoltage Io=500 mA 11.75 12 12.25 V

o

V

OutputVoltage Io=5 mA to 1500 mA

o

OperatingInput Voltage Io=5 mA 17 V

V

i

LineRegulation Io=5 mA Vi=13to17V 3 7 mV

V

∆

o

∆V

LoadRegulation Io=5 to 1500 mA

o

I

Quiescent Current Io=5mA

Q

Quiescent CurrentChange Io=5mA

∆I

Q

OutputVoltageDrift 1.2 mV/oC

V

∆

o

T

∆

SVR Supply Voltage Rejection I

V

Dropout Voltage Io=0.5A

d

I

ShortCircuitCurrent Vi=14V 2 2.7 A

sc

Z

OutputImpedance f = 1KHz Io=0.5A 40

o

= 13.8to 17V

V

i

=500 to 1000 mA

I

o

=1.5A Vi= 13.8V

I

o

=1.5A Vi= 13.8to16 V

I

o

=1 A f = 120 Hz 55 61 dB

o

=1.5A

I

o

11.5 12 12.5 V

15
10

4

30

35
25

8

50

1.5
10

200
500

400
900

m

mV

mA

mA

mV

Ω

5/13

L4940 series

Figure4 :

Dropoutvoltage vs. Output Current.

Figure6 : Output voltage vs. Temperature

(L4940V5).

Figure5 :

DropoutVoltage vs. Temperature.

Figure7 : Output Voltage vs. Temperature

(L4940V85).

Figure8 :

6/13

Outputvoltagevs. Temperature

(L4040V10).

Figure9 :

OutputVoltage vs. Temperature

(L4940V12).

L4940 series

Figure10 :

QuiescentCurrent vs. Temperature

(L4940V5).

Figure12 : QuiescentCurrent vs. Output Current

(L4940V5).

Figure11 :

QuiescentCurrent vs. Input Voltage

(L4940V5).

Figure13 : Short-circuitCurrent vs. Temperature

(L4940V5).

Figure14 : Peak Output Current vs.
Input/OutputDifferential Voltage (L4940V5).

Figure15 : Low VoltageBehavior (L4940V5 ).

7/13

L4940 series

Figure16 :

LowVoltage Behavior (L4940V85).

Figure17 :

Low Voltage Behavior (L4940V10).

Figure18 : Low Voltage Behavior (L4940V12). Figure 19 : SupplyVoltage Rejection vs.

Frequency (L4940V5).

Figure20 :

8/13

SupplyVoltage Rejection vs.

outputCurrent.

Figure21 :

LoadDump Characteristics

(L4940V5 ).

L4940 series

Figure22 :

Line TransientResponse (L4940V5).

Figure24 : Total Power Dissipation.

Figure23 :

LoadTransient Response.

Figure25 :

DistributedSupply with On-cardL4940 and L4941Low-drop Regulators.

9/13

L4940 series

Figure26 :

ADVANTAGES OF THESE APPLICATIONS ARE :
On card regulation with short-circuit and thermal protection on each output.

Very hightotal system efficiency due to the switching preregulation and very low-drop postregulations.

DistributedSupply with On-cardL4940 and L4941Low-drop Regulators.

Figure27.

ADVANTAGES OF THIS CONFIGURATION ARE :
Very highregulation (line and load) on both the output voltages.

12 V output short-circuit and thermally protected.
Very highefficiency on the 12 V outputdue to the very low drop regulator.

10/13

TO-220 MECHANICAL DATA

L4940 series

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

11/13

L4940 series

TO-263 (D2PAK) MECHANICALDATA

DIM.

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

A 4.4 4.6 0.173 0.181
A1 2.49 2.69 0.098 0.106

B 0.7 0.93 0.027 0.036
B2 1.14 1.7 0.044 0.067

C 0.45 0.6 0.017 0.023
C2 1.23 1.36 0.048 0.053

D 8.95 9.35 0.352 0.368

E 10 10.4 0.393 0.409

G 4.88 5.28 0.192 0.208

L 15 15.85 0.590 0.624

L2 1.27 1.4 0.050 0.055
L3 1.4 1.75 0.055 0.068

mm inch

12/13

D

A

C2

DETAIL”A”

C

A2

DETAIL”A”

A1

B2

E

L2

L

L3

B

G

P011P6/F

L4940 series

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13/13