ST LD1086 User Manual

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REGULATOR ADJUSTABLE AND FIXED

■ TYPICAL DROPOUT 1.3V AT 1.5A

■ THREE TERMINAL ADJUSTABLE OR FIXED

OUTPUT VOLTAGE 1.5V, 1.8V, 2.5V, 2.85V,

3.3V,3.6V,5V,8V,9V,12V.

■ GUARANTEED OUTPUT CURRENT UP TO

1.5A

■ OUPUT TOLERANCE ±1% AT 25°C AND

±2% IN FULL TEMPERATURE RA N GE

■ INTERNAL POWER AND THE RMAL LIMIT

■ WIDE OPERATING TEMPERATURE RANGE

-40°C TO 125°C

■ PACKAGE AVAILABLE : TO-220, D

2

D

PAK/A, DPAK

■ PINOUT CO M PATIBILITY WITH STANDARD

ADJUSTABLE VREG

DESCRIPTION

The LD1086 is a LOW DROP Voltage Regulator
able to provide up to 1.5A of Out put Current.
Dropout is guaranteed at a m ax imum of 1.5V at
the maximum output current, decreasing at lower
loads. The LD1086 is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
better performances in term of drop and out put
tolerance .

LD1086

SERIES

1.5A LOW DROP POSITIVE VOLTAGE

TO-220 DPAK

2

PAK,

D2PAK D2PAK/A

A 2.85V output version is suitable for SCSI-2
active termination. Unlike PNP regulators, where
a p art of the output current is was te d as quiescent
current, the LD1086 quiescent current flows into
the load, so increase efficiency. Only a 10µF
minimum capacitor is need for stability. The
device is supplied in TO-220, D
andDPAK.Onchiptrimmingallowstheregulator
to reach a very tight output voltage tolerance,
within ±1% at 25°C.

2

PAK, D2PAK/A

SCHEMATIC DIAGRAM

1/19October 2002

LD1086 SERIES

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter² Value Unit

V
I

P

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.

THERMAL DATA

DC Input Voltage

I

Output Current

O

Power Dissipation

D

Storage Temperature Range

stg

Operating Junction Temperature Range

op

30 V
Internally Limited mA
Internally Limited mW

-55 to +150 °C

-40 to +125 °C

Symbol Parameter TO-220

R

thj-case

R

thj-amb

Thermal Resistance Junction-case
Thermal Resistance Junction-ambient

APPLICATION CIRCUITS

VO=V

REF

2

PAK

D

DPAK Unit

3 3 8 °C/W

50 62.5 °C/W

R

2

(1 + )

R

1

2/19

CONNECTION DIAGRAM (top view)

TO-220 D2PAK

ORDERING CODES

LD1086 SERIES

D2PAK/ADPAK

TO-220

LD1086V15 LD1086D2T15 LD1086D2M15 LD1086DT15 1.5 V
LD1086V18 LD1086D2T18 LD1086D2M18 LD1086DT18 1.8 V
LD1086V25 LD1086D2T25 LD1086D2M25 LD1086DT25 2.5 V
LD1086V28 LD1086D2T28 LD1086D2M28 LD1086DT28 2.85 V
LD1086V33 LD1086D2T33 LD1086D2M33 LD1086DT33 3.3 V
LD1086V36 LD1086D2T36 LD1086D2M36 LD1086DT36 3.6 V
LD1086V50 LD1086D2T50 LD1086D2M50 LD1086DT50 5.0 V
LD1086V80 LD1086D2T80 LD1086D2M80 LD1086DT80 8.0 V
LD1086V90 LD1086D2T90 LD1086D2M90 LD1086DT90 9.0 V
LD1086V12 LD1086D2T12 LD1086D2M12 LD1086DT12 12.0 V

LD1086V LD1086D2T LD1086D2M LD1086DT ADJ

(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.

2

PAK (*) D2PAK/A (*)

D

DPAK (*) OUTPUT VOLTAGE

3/19

LD1086 SERIES

ELECTRICAL CHARACTERISTICS OF LD1086#15 (VI=4.5V, CI=CO=10µF, TA= -40 to 125°C, unless

otherwise specified.)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage (note 1) IO=0mA TJ= 25°C 1.485 1.5 1.515 V

O

= 0 to 1.5A VI= 3.4 to 30V 1.47 1.5 1.53 V

I

O

∆V

∆V

SVR Supply Voltage Rejection f= 120 Hz, C

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

Line Regulation IO=0mA VI= 3.1 to 18V TJ= 25°C 0.2 4 mV

O

=0mA VI= 3.1 to 15V 0.4 4 mV

I

O

Load Regulation IO= 0 to 1.5A TJ= 25°C 0.5 8 mV

O

I

= 0 to 1.5A 1 16 V

O

Dropout Voltage IO= 1.5A 1.3 1.5 V

V

d

Quiescent Current VI≤ 30V 5 10 mA

I

q

Short Circuit Current VI-VO= 5V 1.5 2 A

I

sc

= 25V 0.05 0.02 A

V

I-VO

Termal Regulation T

eN RMS Output Noise Voltage

(% of V

)

O

= 25°C, 30ms pulse 0.01 0.04 %/W

A

=25µF, IO= 1.5A

V

= 6.5 ± 3V

I

T

= 25°C f =10Hz to 10KHz 0.003 %

A

O

60 82 dB

S Temperature Stability 0.5 %
S Long Term Stability T

= 125°C 1000Hrs 0.5 %

A

ELECTRICAL CHARACTERISTICS OF LD1086#18 (VI=4.8V, CI=CO=10µF, TA= -40 to 125°C, unless
otherwise specified.)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Output Voltage (note 1) IO=0mA TJ= 25°C 1.782 1.8 1.818 V

V

O

= 0 to 1.5A VI= 3.4 to 30V 1.764 1.8 1.836 V

I

O

∆V

∆V

SVR Supply Voltage Rejection f = 120 Hz, C

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

Line Regulation IO=0mA VI= 3.4 to 18V TJ= 25°C 0.2 4 mV

O

=0mA VI= 3.4 to 15V 0.4 4 mV

I

O

Load Regulation IO= 0 to 1.5A TJ= 25°C 0.5 8 mV

O

= 0 to 1.5A 1 16 V

I

O

Dropout Voltage IO= 1.5A 1.3 1.5 V

V

d

Quiescent Current VI≤ 30V 5 10 mA

I

q

Short Circuit Current VI-VO= 5V 1.5 2 A

I

sc

= 25V 0.05 0.02 A

V

I-VO

Termal Regulation T

eN RMS Output Noise Voltage

(% of V

)

O

= 25°C, 30ms pulse 0.01 0.04 %/W

A

=25µF, IO= 1.5A

= 6.8 ± 3V

V

I

T

= 25°C f =10Hz to 10KHz 0.003 %

A

O

60 82 dB

S Temperature Stability 0.5 %
S Long Term Stability T

= 125°C 1000Hrs 0.5 %

A

4/19

LD1086 SERIES

ELECTRICAL CHARACTERISTICS OF LD1086#25 (VI=5.5V, CI=CO=10µF, TA= -40 to 125°C, unless

otherwise specified.)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage (note 1) IO=0mA TJ= 25°C 2.475 2.5 2.525 V

O

= 0 to 1.5A VI= 4.1 to 30V 2.45 2.5 2.55 V

I

O

∆V

∆V

SVR Supply Voltage Rejection f = 120 Hz, C

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

Line Regulation IO=0mA VI= 4.1 to 18V TJ= 25°C 0.2 4 mV

O

=0mA VI= 4.1 to 18V 0.4 4 mV

I

O

Load Regulation IO= 0 to 1.5A TJ= 25°C 0.5 8 mV

O

I

= 0 to 1.5A 1 16 V

O

Dropout Voltage IO= 1.5A 1.3 1.5 V

V

d

Quiescent Current VI≤ 30V 5 10 mA

I

q

Short Circuit Current VI-VO= 5V 1.5 2 A

I

sc

= 25V 0.05 0.2 A

V

I-VO

Termal Regulation T

eN RMS Output Noise Voltage

(% of V

)

O

= 25°C, 30ms pulse 0.008 0.04 %/W

A

=25µF, IO= 1.5A

V

= 7.5 ± 3V

I

T

= 25°C f =10Hz to 10KHz 0.003 %

A

O

60 81 dB

S Temperature Stability 0.5 %
S Long Term Stability T

= 125°C 1000Hrs 0.5 %

A

ELECTRICAL CHARACTERISTICS OF LD1086#285 (VI=5.85V, CI=CO=10µF, TA= -40 to 125°C,
unless otherwise specified.)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Output Voltage (note 1) IO=0mA TJ= 25°C 2.821 2.85 2.879 V

V

O

= 0 to 1.5A VI= 4.5 to 30V 2.793 2.85 2.907 V

I

O

∆V

∆V

SVR Supply Voltage Rejection f = 120 Hz, C

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

Line Regulation IO=0mA VI= 4.5 to 18V TJ= 25°C 0.2 6 mV

O

=0mA VI= 4.5 to 18V 0.5 6 mV

I

O

Load Regulation IO= 0 to 1.5A TJ= 25°C 1 12 mV

O

= 0 to 1.5A 2 20 V

I

O

Dropout Voltage IO= 1.5A 1.3 1.5 V

V

d

Quiescent Current VI≤ 30V 5 10 mA

I

q

Short Circuit Current VI-VO= 5V 1.5 2 A

I

sc

= 25V 0.05 0.2 A

V

I-VO

Termal Regulation T

eN RMS Output Noise Voltage

(% of V

)

O

= 25°C, 30ms pulse 0.01 0.04 %/W

A

=25µF, IO= 1.5A

= 7.85 ± 3V

V

I

T

= 25°C f =10Hz to 10KHz 0.003 %

A

O

60 80 dB

S Temperature Stability 0.5 %
S Long Term Stability T

= 125°C 1000Hrs 0.5 %

A

5/19

LD1086 SERIES

ELECTRICAL CHARACTERISTICS OF LD1086#33 (VI=6.3V, CI=CO=10µF, TA= -40 to 125°C, unless

otherwise specified.)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage (note 1) IO=0mA TJ= 25°C 3.267 3.3 3.333 V

O

= 0 to 1.5A‘ VI= 4.9 to 30V 3.234 3.35 3.366 V

I

O

∆V

∆V

SVR Supply Voltage Rejection f = 120 Hz, C

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

Line Regulation IO=0mA VI= 4.9 to 18V TJ= 25°C 0.5 6 mV

O

=0mA VI= 4.9 to 18V 1 6 mV

I

O

Load Regulation IO= 0 to 1.5A TJ= 25°C 1 10 mV

O

I

= 0 to 1.5A 7 25 V

O

Dropout Voltage IO= 1.5A 1.3 1.5 V

V

d

Quiescent Current VI≤ 30V 5 10 mA

I

q

Short Circuit Current VI-VO= 5V 1.5 2 A

I

sc

= 25V 0.05 0.2 A

V

I-VO

Termal Regulation T

eN RMS Output Noise Voltage

(% of V

)

O

= 25°C, 30ms pulse 0.008 0.04 %/W

A

=25µF, IO= 1.5A

V

= 8.3 ± 3V

I

T

= 25°C f =10Hz to 10KHz 0.003 %

A

O

60 79 dB

S Temperature Stability 0.5 %
S Long Term Stability T

= 125°C 1000Hrs 0.5 %

A

ELECTRICAL CHARACTERISTICS OF LD1086#36 (VI=6.6V, CI=CO=10µF, TA= -40 to 125°C, unless
otherwise specified.)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Output Voltage (note 1) IO=0mA TJ= 25°C 3.564 3.6 3.636 V

V

O

= 0 to 1.5A VI= 5.2 to 30V 3.528 3.6 3.672 V

I

O

∆V

∆V

SVR Supply Voltage Rejection f = 120 Hz, C

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

Line Regulation IO=0mA VI= 5.2 to 18V TJ= 25°C 0.5 10 mV

O

=0mA VI= 5.2 to 18V 1 10 mV

I

O

Load Regulation IO= 0 to 1.5A TJ= 25°C 3 15 mV

O

= 0 to 1.5A 7 25 V

I

O

Dropout Voltage IO= 1.5A 1.3 1.5 V

V

d

Quiescent Current VI≤ 30V 5 10 mA

I

q

Short Circuit Current VI-VO= 5V 1.5 2 A

I

sc

= 25V 0.05 0.2 A

V

I-VO

Termal Regulation T

eN RMS Output Noise Voltage

(% of V

)

O

= 25°C, 30ms pulse 0.01 0.04 %/W

A

=25µF, IO= 1.5A

= 8.6 ± 3V

V

I

T

= 25°C f =10Hz to 10KHz 0.003 %

A

O

60 78 dB

S Temperature Stability 0.5 %
S Long Term Stability T

= 125°C 1000Hrs 0.5 %

A

6/19