Datasheet LD1117AV50, LD1117AV33, LD1117AV28, LD1117AV25, LD1117AV18 Datasheet (SGS Thomson Microelectronics)

1/16October 2003

■ LOW DROPOUT VOLTAGE

(1.15V TYP. @ I

OUT

=1A,25°C)

■ VERY LOW QUIESCENT CURRENT

(5 mA TYP. @ 25°C)

■ OUTPUT CURRENT UP TO 1A

■ FIXED OUTPUT VOLTAGE OF: 1.8V, 2.5V,

2.85V, 3.3V, 5.0V

■ ADJUSTABLE VERSION AVAILABILITY

(V

rel

= 1.25V)

■ INTERNAL CURRENT AND THERMAL LIMIT

■ ONLY 10 µFFOR STABILITY

■ AVAILABLEIN ± 2% (AT 25°C) AND 4% IN

FULL TEMPERATURE RANGE

■ HIGH SUPPLY VOLTAGE REJECTION:

(80dB TYP. AT 25°C)

■ TEMPERATURE RANGE: 0°C TO 125°C

DESCRIPTION

The LD1117A is a LOW DROP Voltage Regulator
able to provide up to 1A of Output Current,
available even in adjustable version (V ref=1.25V).
Concerning fixed v ers ions, are offered the
following Output Voltages: 1.8V, 2.5V, 2.85V,

3.3V and 5.0V. The 2. 85V type is ideal for SCSI-2
lines active termination. The device is suppl ied in:

SOT-223, D PAK and TO-220. The surface mount
packages optimize the thermal characteristics
even offering a relevant space saving effect. High
efficiency is assured by NPN pas s transistor. Only
a very common 10µF minimum capac it or is
needed for stability. Only chip trimming allows the
regulator to rea ch a very tight out put voltage
tolerance, within ± 2% at 25 ° C.

LD1117A

SERIES

LOW DROP FIXED AND ADJUSTABLE

POSITIVE VOLTAGE REGULATORS

BLOCK DIAGRAM

SOT-223

DPAK

TO-220

LD1117A SER IES

2/16

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied. Over the above suggested Max Power Dissipation a Short Circuit could definitively damage the device.

THERMAL DATA

APPLICATION CIRCUIT (FOR OTHER FIXED OUTPUT VOLTAGES)

Symbol Parameter² Value Unit

V

IN

DC Input Voltage

10 V

P

tot

Power Dissipation

12 W

T

stg

Storage Temperature Range

-40 to +150 °C

T

op

Operating Junction Temperature Range

0 to +125 °C

Symbol Parameter TO-220 SOT-223 DPAK Unit

R

thj-case

Thermal Resistance Junction-case

3 15 8 °C/W

R

thj-amb

Thermal Resistance Junction-ambient

50 °C/W

LD1117A SERIES

3/16

CONNECTION DIAGRAM (top view)

NOTE: The TAB is connected to the V

OUT

.

ORDERING CODES

SOT-223 DPAK TO-220 OUTPUT VOLTAGE

LD1117AS18TR LD1117ADT18TR LD1117AV18 1.8 V
LD1117AS25TR LD1117ADT25TR LD1117AV25 2.5 V
LD1117AS28TR LD1117ADT28TR LD1117AV28 2.85 V
LD1117AS33TR LD1117ADT33TR LD1117AV33 3.3 V
LD1117AS50TR LD1117ADT50TR LD1117AV50 5 V

LD1117AST-R LD1117ADT-R LD1117AV ADJUSTABLE FROM 1.25

TO 15 V

SOT-223

DPAK

TO-220

LD1117A SER IES

4/16

ELECTRICAL CHARACTERISTICS OF LD1117A#18 (refer to the test circuits, TJ= 0 to 125°C,
C

O

=10µF,CI= 10 µF unless otherwise specified)

ELECTRICAL CHARACTERISTICS OF LD1117A#25 (refer to the test circuits, T

J

= 0 to 125°C,

C

O

=10µF,CI= 10 µF unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

O

Output Voltage VI= 3.8 V IO=10mA TJ= 25°C 1.764 1.8 1.836 V

V

O

Output Voltage IO=0to1A VI= 3.3 to 8 V 1.728 1.872 V

∆V

O

Line Regulation VI= 3.3 to 8 V IO= 0 mA 1 6 mV

∆V

O

Load Regulation VI= 3.3 V IO= 0 to 1 A 1 10 mV

∆V

O

Temperature Stability 0.5 %

∆V

O

Long Term Stability 1000 hrs, TJ= 125°C 0.3 %

V

I

Operating Input Voltage IO= 100 mA 10 V

I

d

Quiescent Current VI≤ 8V IO= 0 mA 5 10 mA

I

O

Output Current VI-VO=5VTJ= 25°C 1000 mA

eN Output Noise Voltage B =10Hz to 10KHz T

J

= 25°C 100 µV

SVR Supply Voltage Rejection I

O

= 40 mA f = 120Hz

V

I-VO

=3VV

ripple

=1V

PP

60 80 dB

V

D

Dropout Voltage IO= 100 mA 1 1.10 V

I

O

= 500 mA 1.05 1.15

I

O

= 1 A 1.15 1.30

∆V

O(pwr)

Thermal Regulation Ta= 25°C 30ms Pulse 0.08 0.2 %/W

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

O

Output Voltage VI= 4.5 V IO=10mA TJ= 25°C 2.45 2.5 2.55 V

V

O

Output Voltage IO=0to1A VI= 3.9 to 8 V 2.4 2.6 V

∆V

O

Line Regulation VI= 3.9 to 8 V IO= 0 mA 1 6 mV

∆V

O

Load Regulation VI= 3.9 V IO= 0 to 1 A 1 10 mV

∆V

O

Temperature Stability 0.5 %

∆V

O

Long Term Stability 1000 hrs, TJ= 125°C 0.3 %

V

I

Operating Input Voltage IO= 100 mA 10 V

I

d

Quiescent Current VI≤ 10 V IO= 0 mA 5 10 mA

I

O

Output Current VI-VO=5VTJ= 25°C 1000 1200 mA

eN Output Noise Voltage B =10Hz to 10KHz T

J

= 25°C 100 µV

SVR Supply Voltage Rejection I

O

= 40 mA f = 120Hz

V

I-VO

=3VV

ripple

=1V

PP

60 80 dB

V

D

Dropout Voltage IO= 100 mA 1 1.10 V

I

O

= 500 mA 1.05 1.15

I

O

= 1 A 1.15 1.30

∆V

O(pwr)

Thermal Regulation Ta= 25°C 30ms Pulse 0.08 0.2 %/W

LD1117A SERIES

5/16

ELECTRICAL CHARACTERISTICS OF LD1117A#28 (refer to the test circuits, TJ= 0 to 125°C,
C

O

=10µF,CI= 10 µF unless otherwise specified)

ELECTRICAL CHARACTERISTICS OF LD1117A#33 (refer to the test circuits, T

J

= 0 to 125°C,

C

O

=10µF,CI= 10 µF unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

O

Output Voltage VI= 4.85 V IO=10mA TJ= 25°C 2.793 2.85 2.907 V

V

O

Output Voltage IO=0to1A VI= 4.25 to 10 V 2.736 2.964 V

∆V

O

Line Regulation VI= 4.25 to 8 V IO= 0 mA 1 6 mV

∆V

O

Load Regulation VI= 4.25 V IO= 0 to 1 A 1 10 mV

∆V

O

Temperature Stability 0.5 %

∆V

O

Long Term Stability 1000 hrs, TJ= 125°C 0.3 %

V

I

Operating Input Voltage IO= 100 mA 10 V

I

d

Quiescent Current VI≤ 10 V IO= 0 mA 4.5 10 mA

I

O

Output Current VI-VO=5VTJ= 25°C 1000 1200 mA

eN Output Noise Voltage B =10Hz to 10KHz T

J

= 25°C 100 µV

SVR Supply Voltage Rejection I

O

= 40 mA f = 120Hz

V

I-VO

=3VV

ripple

=1V

PP

60 75 dB

V

D

Dropout Voltage IO= 100 mA 1 1.10 V

I

O

= 500 mA 1.05 1.15

I

O

= 1 A 1.15 1.30

∆V

O(pwr)

Thermal Regulation Ta= 25°C 30ms Pulse 0.08 0.2 %/W

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

O

Output Voltage VI= 5.3 V IO=10mA TJ= 25°C 3.234 3.3 3.366 V

V

O

Output Voltage IO=0to1A VI= 4.75 to 10 V 3.168 3.432 V

∆V

O

Line Regulation VI= 4.75 to 8 V IO= 0 mA 1 6 mV

∆V

O

Load Regulation VI= 4.75 V IO= 0 to 1 A 1 10 mV

∆V

O

Temperature Stability 0.5 %

∆V

O

Long Term Stability 1000 hrs, TJ= 125°C 0.3 %

V

I

Operating Input Voltage IO= 100 mA 10 V

I

d

Quiescent Current VI≤ 10 V IO= 0 mA 5 10 mA

I

O

Output Current VI-VO=5VTJ= 25°C 1000 1200 mA

eN Output Noise Voltage B =10Hz to 10KHz T

J

= 25°C 100 µV

SVR Supply Voltage Rejection I

O

= 40 mA f = 120Hz

V

I-VO

=3VV

ripple

=1V

PP

60 75 dB

V

D

Dropout Voltage IO= 100 mA 1 1.10 V

I

O

= 500 mA 1.05 1.15

I

O

= 1 A 1.15 1.30

∆V

O(pwr)

Thermal Regulation Ta= 25°C 30ms Pulse 0.08 0.2 %/W

LD1117A SER IES

6/16

ELECTRICAL CHARACTERISTICS OF LD1117A#50 (refer to the test circuits, TJ= 0 to 125°C,
C

O

=10µF,CI= 10 µF unless otherwise specified)

ELECTRICAL CHARACTERISTICS OF LD1117A (ADJUSTABLE) (refer to the test circuits, T

J

=0to

125°C, C

O

=10µF,CI= 10 µF unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

O

Output Voltage VI=7V IO=10mA TJ= 25°C 4.9 5 5.1 V

V

O

Output Voltage IO=0to1A VI= 6.4 to 10 V 4.8 5.2 V

∆V

O

Line Regulation VI= 6.4 to 8 V IO= 0 mA 1 6 mV

∆V

O

Load Regulation VI= 6.4 V IO= 0 to 1 A 1 10 mV

∆V

O

Temperature Stability 0.5 %

∆V

O

Long Term Stability 1000 hrs, TJ= 125°C 0.3 %

V

I

Operating Input Voltage IO= 100 mA 10 V

I

d

Quiescent Current VI≤ 10 V IO= 0 mA 5 10 mA

I

O

Output Current VI-VO=5VTJ= 25°C 1000 1200 mA

eN Output Noise Voltage B =10Hz to 10KHz T

J

= 25°C 100 µV

SVR Supply Voltage Rejection I

O

= 40 mA f = 120Hz

V

I-VO

=3VV

ripple

=1V

PP

60 80 dB

V

D

Dropout Voltage IO= 100 mA 1 1.10 V

I

O

= 500 mA 1.05 1.15

I

O

= 1 A 1.15 1.30

∆V

O(pwr)

Thermal Regulation Ta= 25°C 30ms Pulse 0.08 0.2 %/W

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

O

Output Voltage VI= 5.3 V IO=10mA TJ= 25°C 1.225 1.25 1.275 V

V

O

Output Voltage IO=0to1A VI= 2.75 to 10 V 1.2 1.3 V

∆V

O

Line Regulation VI= 2.75 to 8 V IO= 0 mA 1 6 mV

∆V

O

Load Regulation VI= 2.75 V IO= 0 to 1 A 1 10 mV

∆V

O

Temperature Stability 0.5 %

∆V

O

Long Term Stability 1000 hrs, TJ= 125°C 0.3 %

V

I

Operating Input Voltage IO= 100 mA 10 V

I

d

Quiescent Current VI≤ 8V IO= 0 mA 5 10 mA

I

O

Output Current VI-VO=5VTJ= 25°C 1000 1200 mA

eN Output Noise Voltage B =10Hz to 10KHz T

J

= 25°C 100 µV

SVR Supply Voltage Rejection I

O

= 40 mA f = 120Hz

V

I-VO

=3VV

ripple

=1V

PP

60 80 dB

V

D

Dropout Voltage IO= 100 mA 1 1.10 V

I

O

= 500 mA 1.05 1.15

I

O

= 1 A 1.15 1.30

∆V

O(pwr)

Thermal Regulation Ta= 25°C 30ms Pulse 0.08 0.2 %/W

LD1117A SERIES

7/16

TYPICAL APPLICATIONS
Figure1 : Negative Supply

Figure2 : Active Terminator for SCSI-2 BUS

Figure3 : Circuit for Increasing Output Voltage

LD1117A SER IES

8/16

Figure4 : Voltage Regulator With Reference

Figure5 : Battery Backed-up Regulated Supply

LD1117A SERIES

9/16

Figure6 : Post-Regulated Dual Supply

LD1117A SER IES

10/16

LD1117A ADJUSTABLE: APPLICATION NOTE

The LD1117A ADJUSTABLE has a thermal stabilized 1.25±0.012V reference voltage between the OUT
and ADJ pins. I

ADJ

is 60µA typ. (120µA max.) and ∆I

ADJ

is 1µA typ. (5µA max.).
R1 is normally fixed to 120Ω. From figure 7 we obtain:
V

OUT=VREF

+R2(I

ADJ+IR1

)=V

REF

+R2(I

ADJ+VREF

/R1) = V

REF

(1 + R2 / R1) + R2 x I

ADJ

.

In normal application R2 value is in the range of few Kohm, so t he R2 x I

DJ

product could not be

considered in the V

OUT

calculation; then the above expression becomes:

V

OUT=VREF

(1 + R2 / R1).
In order to have the better load regulation it is important to realize a good Kelvin connection of R1 and R2
resistors. In particular R1 c onnection must be realized very close to OUT and ADJ pin, while R2 grou nd
connection mus t be placed as near as possible to the negative Load pin. Ripple rejection can be improved
by introducing a 10µF electrolytic capacitor placed in parallel to the R2 resistor (see F ig.8).

Figure7 : Adjustable Output Voltage Application

Figure8 : Adjustable Output Voltage Application with improved Ripple Rejection

LD1117A SERIES

11/16

DIM.

mm. mils

MIN. TYP MAX. MIN. TYP. MAX.

A 1.8 70.9

A1 0.02 0.1 0.8 3.9

B 0.6 0.7 0.8523.627.633.5

B1 2.9 3 3.15 114.2 118.1 124.0

c 0.24 0.26 0.35 9.4 10.2 13.8

D 6.3 6.5 6.7 248.0 255.9 263.8

e 2.3 90.6

e1 4.6 181.1

E 3.3 3.5 3.7 129.9 137.8 145.7

H 6.7 7 7.3 129.9 137.8 145.7

V 10˚

SOT-223 MECHANICAL DATA

0046067/H

10˚

LD1117A SER IES

12/16

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

DPAK MECHANI

CAL DATA

0068772-B

LD1117A SERIES

13/16

DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 4.40 4.60 0.173 0.181

C 1.23 1.32 0.048 0.051

D 2.40 2.72 0.094 0.107
D1 1.27 0.050

E 0.49 0.70 0.019 0.027

F 0.61 0.88 0.024 0.034
F1 1.14 1.70 0.044 0.067
F2 1.14 1.70 0.044 0.067

G 4.95 5.15 0.194 0.203
G1 2.4 2.7 0.094 0.106
H2 10.0 10.40 0.393 0.409
L2 16.4 0.645
L4 13.0 14.0 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.25 15.75 0.600 0.620
L7 6.2 6.6 0.244 0.260
L9 3.5 3.93 0.137 0.154

DIA. 3.75 3.85 0.147 0.151

TO-220 MECHANICAL DAT

A

P011C

LD1117A SER IES

14/16

DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 180 7.086

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N 60 2.362

T 14.4 0.567
Ao 6.73 6.83 6.93 0.265 0.269 0.273
Bo 7.32 7.42 7.52 0.288 0.292 0.296
Ko 1.78 2 0.070 0.078
Po 3.9 4.0 4.1 0.153 0.157 0.161

P 7.9 8.0 8.1 0.311 0.315 0.319

Tape & Reel SOT223 MECHANICAL DATA

LD1117A SERIES

15/16

DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 330 12.992

C 12.8 13.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N 60 2.362

T 14.4 0.567
Ao 6.80 6.90 7.00 0.268 0.272 0.2.76
Bo 10.40 10.50 10.60 0.409 0.413 0.417
Ko 2.55 2.65 2.75 0.100 0.104 0.105
Po 3.9 4.0 4.1 0.153 0.157 0.161

P 7.9 8.0 8.1 0.311 0.315 0.319

Tape & Reel DPAK-PPAK MECHANICAL DATA

LD1117A SER IES

16/16

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