ON Semiconductor LM285, LM385B Technical data

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LM285, LM385B

Micropower Voltage
Reference Diodes

The LM285/LM385 series are micropower two−terminal bandgap
voltage regulator diodes. Designed to operate over a wide current
range of 10 mA to 20 mA, these devices feature exceptionally low
dynamic impedance, low noise and stable operation over time and
temperature. Tight voltage tolerances are achieved by on−chip
trimming. The large dynamic operating range enables these devices to
be used in applications with widely varying supplies with excellent
regulation. Extremely low operating current make these devices ideal
for micropower circuitry like portable instrumentation, regulators and
other analog circuitry where extended battery life is required.

The LM285/LM385 series are packaged in a low cost TO−226
plastic case and are available in two voltage versions of 1.235 V and

2.500 V as denoted by the device suffix (see Ordering Information
table). The LM285 is specified over a −40°C to +85°C temperature
range while the LM385 is rated from 0°C to +70°C.

The LM385 is also available in a surface mount plastic package in
voltages of 1.235 V and 2.500 V.

Features

• Operating Current from 10 mA to 20 mA

• 1.0%, 1.5%, 2.0% and 3.0% Initial Tolerance Grades

• Low Temperature Coefficient

• 1.0 W Dynamic Impedance

• Surface Mount Package Available

• Pb−Free Packages are Available

Cathode

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SOIC−8

8

1

N.C.

Cathode

Anode

xxx = 1.2 or 2.5
y = 2 or 3
z = 1 or 2
A = Assembly Location
L = Wafer Lot
Y = Year
W, WW = Work Week
G = Pb−Free Package

(Note: Microdot may be in either location)

D SUFFIX
CASE 751

TO−92

(TO−226)

Z SUFFIX

CASE 29

MARKING

DIAGRAMS

8

y85−z
ALYW

G

1

LMy85

Z−xxx

AL YWWG

G

360 k
Open
for 1.235 V

600 k

for 2.5 V

600 k

Open

8.45 k

74.3 k

425 k

Figure 1. Representative Schematic Diagram

© Semiconductor Components Industries, LLC, 2005

November, 2005 − Rev. 7

600 k

Anode

10 k

(Bottom View)

132

N.C.
N.C.
N.C.

Anode

1

2

3

4

Standard Application

+

−

500 W

1.5 V

Battery

100 k

ORDERING INFORMATION

See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.

1 Publication Order Number:

8

7

6

5

3.3 k

1.235 V

LM385−1.2

Cathod
N.C.
N.C.
N.C.

LM285/D

LM285, LM385B

MAXIMUM RATINGS (T

= 25°C, unless otherwise noted)

A

Rating Symbol Value Unit

Reverse Current I
Forward Current I
Operating Ambient Temperature Range

LM285

LM385
Operating Junction Temperature T
Storage Temperature Range T
Electrostatic Discharge Sensitivity (ESD)

ESD
Human Body Model (HBM)
Machine Model (MM)
Charged Device Model (CDM)

R
F

T

A

J

stg

30 mA
10 mA

°C

−40 to +85
0 to +70

+150 °C

−65 to + 150 °C
V

4000

400

2000

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.

ELECTRICAL CHARACTERISTICS (T

= 25°C, unless otherwise noted)

A

LM285−1.2 LM385−1.2/LM385B−1.2

Characteristic Symbol

Reverse Breakdown Voltage (I

v IR v 20 mA)

Rmin

LM285−1.2/LM385B−1.2

TA = T

low

to T

high

(Note 1)

LM385−1.2

TA = T

low

to T

high

(Note 1)

Minimum Operating Current

TA = 25°C
TA = T

low

to T

high

(Note 1)

Reverse Breakdown Voltage Change with Current

I

v IR v 1.0 mA, TA = +25°C

Rmin

TA = T

low

to T

high

(Note 1)

1.0 mA v IR v 20 mA, TA = +25°C
TA = T

low

to T

high

(Note 1)

Reverse Dynamic Impedance

IR = 100 mA, TA = +25°C

Average Temperature Coefficient

10 mA v IR v 20 mA, TA = T

low

to T

high

(Note 1)

Wideband Noise (RMS)

IR = 100 mA, 10 Hz v f v 10 kHz

Long Term Stability

IR = 100 mA, TA = +25°C ± 0.1°C

Reverse Breakdown Voltage (I

v IR v 20 mA)

Rmin

LM285−2.5/LM385B−2.5

TA = T

low

to T

high

(Note 1)

LM385−2.5

TA = T

low

to T

high

(Note 1)

Minimum Operating Current

TA = 25°C

1. T

TA = T

low

T

high

T

low

T

high

to T

high

(Note 1)

low

= −40°C for LM285−1.2, LM285−2.5
= +85°C for LM285−1.2, LM285−2.5
= 0°C for LM385−1.2, LM385B−1.2, LM385−2.5, LM385B−2.5
=+70°C for LM385−1.2, LM385B−1.2, LM385−2.5, LM385B−2.5

DV

DV

V

I

(BR)

V

I

(BR)R

Rmin

(BR)R

Z

n

S

(BR)R

Rmin

Min Typ Max Min Typ Max

1.223

1.200

1.235

−

−

−

8.0

−

−

−

−

−

1.247

−

1.270

−

−

1.223

1.210

−

1.205

−

1.192

10

−

−

−

−

−

20

1.0

1.5
10
20

−

−

−

−

−

− 0.6 − − 0.6 −

/DT

− 80 − − 80 −

− 60 − − 60 −

− 20 − − 20 −

2.462

2.415

−

−

−

−

2.5

13

2.538

−

2.585

−

−

−

20
30

2.462

2.436

−

2.425

−

2.400

−

−

1.235

−

1.235

−

8.0

−

−

−

−

−

2.5

−

2.5

−

13

−

Unit

V

1.247

1.260

1.260

1.273
mA

15
20

mV

1.0

1.5
20
25

W

ppm/°C

mV

ppm/kHR

V

2.538

2.564

2.575

2.600
mA

20
30

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2

LM285, LM385B

ELECTRICAL CHARACTERISTICS (T

A

Characteristic Symbol

Reverse Breakdown Voltage Change with Current

I

v IR v 1.0 mA, TA = +25°C

Rmin

T

= T

to T

A

low

1.0 mA v I
TA = T

low

(Note 2)

high

v 20 mA, TA = +25°C

R

to T

(Note 2)

high

Reverse Dynamic Impedance

IR = 100 mA, TA = +25°C

Average Temperature Coefficient

20 mA v IR v 20 mA, TA = T

low

to T

high

(Note 2)

Wideband Noise (RMS)

IR = 100 mA, 10 Hz v f v 10 kHz

Long Term Stability

IR = 100 mA, TA = +25°C ± 0.1°C

2. T

= −40°C for LM285−1.2, LM285−2.5

low

T

= +85°C for LM285−1.2, LM285−2.5

high

T

= 0°C for LM385−1.2, LM385B−1.2, LM385−2.5, LM385B−2.5

low

T

=+70°C for LM385−1.2, LM385B−1.2, LM385−2.5, LM385B−2.5

high

= 25°C, unless otherwise noted)

Min Typ Max Min Typ Max

DV

(BR)R

−

−

−

−

Z

− 0.6 − − 0.6 −

DV

/DT

(BR)

− 80 − − 80 −

n

− 120 − − 120 −

S

− 20 − − 20 −

LM285−1.2 LM385−1.2/LM385B−1.2

−

−

−

−

1.0

1.5
10

20

−

−

−

−

−

−

−

−

2.0

2.5
20

25

Unit

mV

W

ppm/°C

mV

ppm/kHR

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3

√

TYPICAL PERFORMANCE CURVES FOR LM285−1.2/385−1.2/385B−1.2

100

LM285, LM385B

10

1.0

, REVERSE CURRENT (A)μI

R

0.1

1.2

1.0

0.8

0.6

0.4

, FORWARD VOLTAGE (V)

F

V

0.2

8.0

6.0

, REVERSE VOLTAGE CHANGE (mV)Δ

(BR)R

V

−2.0

4.0

2.0

0

TA = +85°C

+25 °C

−40 °C

0.2 0.4 0.6 0.8 1.0 1.2101.4

0

V(

, REVERSE VOLTAGE (V)

BR)

Figure 2. Reverse Characteristics Figure 3. Reverse Characteristics

1.250

1.240

TA = −40°C

1.230

+25 °C

0

IF, FORWARD CURRENT (mA)

+85 °C

, REVERSE VOLTAGE (V)

1.220

(BR)R

V

100.01 1001.00.1

1.210

Figure 4. Forward Characteristics Figure 5. Temperature Drift

TA = +85°C

+25 °C

0.1 1.0 10 1000.01
IR, REVERSE CURRENT (mA)

TA, AMBIENT TEMPERATURE (°C)

−40 °C

IR = 100 mA

1007550025−25−50

125

, NOISE (nV/ Hz)

n

e

875

750

625

500

375

250

125

0

100

f, FREQUENCY (Hz)

1.0K 100k10K10

Figure 6. Noise Voltage

OUTPUT (V)INPUT (V)

1.50

1.25

1.00

0.75

0.50

0.25

5.0

Input

100 k

Output

DUT

0

10

0

0 1.00.90.80.70.60.30.20.1

t, TIME (ms)

1.1

Figure 7. Response Time

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4

√

TYPICAL PERFORMANCE CURVES FOR LM285−2.5/385−2.5/385B−2.5

100

LM285, LM385B

10

1.0

, REVERSE CURRENT (A)μI

R

0.1

1.2

1.0

0.8

0.6

0.4

, FORWARD VOLTAGE (V)

F

V

0.2

8.0

, REVERSE VOLTAGE CHANGE (mV)Δ

(BR)R

V

−2.0

6.0

4.0

2.0

0

TA = +85°C

+25 °C

−40 °C

0.5 1.0 1.5 2.0 2.5 3.0103.5

0

V(

, REVERSE VOLTAGE (V)

BR)

Figure 8. Reverse Characteristics

2.520

2.510

TA = −40°C

+85 °C

+25 °C

0

IF, FORWARD CURRENT (mA)

100.01 1001.00.1

2.500

2.490

2.480

, REVERSE VOLTAGE (V)

2.470

(BR)R

2.460

V

2.450

Figure 10. Forward Characteristics

TA = +85°C

+25 °C

0.1 1.0 10 1000.01
IR, REVERSE CURRENT (mA)

Figure 9. Reverse Characteristics

IR = 100 mA

TA, AMBIENT TEMPERATURE (°C)

Figure 11. Temperature Drift

−40 °C

1007550025−25−50

125

3.00

1500

1250

1000

, NOISE (nV/ Hz)

n

e

750

500

250

2.50

2.00

1.50

OUTPUT (V)INPUT (V)

1.00

0.50

0

10

5.0

0

100 1.0K 100k10K10

f, FREQUENCY (Hz)

0

0 1.00.90.80.70.60.30.20.1

t, TIME (ms)

Input

DUT

100 k

Output

1.1

Figure 12. Noise Voltage Figure 13. Response Time

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5

LM285, LM385B

ORDERING INFORMATION

Device

LM285D−1.2
LM285D−1.2G SOIC−8

LM285D−1.2R2 SOIC−8 2500 / Tape & Reel
LM285D−1.2R2G SOIC−8

LM285D−2.5
LM285D−2.5G SOIC−8

LM285D−2.5R2 SOIC−8 2500 / Tape & Reel
LM285D−2.5R2G SOIC−8

LM285Z−1.2
LM285Z−1.2G TO−92

LM285Z−2.5
LM285Z−2.5G TO−92

LM285Z−1.2RA
LM285Z−1.2RAG TO−92

LM285Z−2.5RA
LM285Z−2.5RAG TO−92

LM285Z−2.5RP TO−92 2000 Units / Fan−Fold
LM285Z−2.5RPG TO−92

LM385BD−1.2
LM385BD−1.2G SOIC−8

LM385BD−1.2R2 SOIC−8 2500 / Tape & Reel
LM385BD−1.2R2G SOIC−8

LM385BD−2.5
LM385BD−2.5G SOIC−8

LM385BD−2.5R2 SOIC−8 2500 / Tape & Reel
LM385BD−2.5R2G SOIC−8

LM385BZ−1.2
LM385BZ−1.2G TO−92

LM385BZ−1.2RA TO−92 2000 / Tape & Reel
LM385BZ−1.2RAG TO−92

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

Operating Temperature Range

TA = −40°C to +85°C

TA = 0°C to +70°C

Reverse Break−Down

Voltage

1.235 V

2.500 V

1.235 V

2.500 V

1.235 V

2.500 V

1.235 V

2.500 V

1.235 V

Package

SOIC−8 98 Units / Rail

(Pb−Free)

(Pb−Free)

SOIC−8 98 Units / Rail

(Pb−Free)

(Pb−Free)

TO−92 2000 Units / Bag

(Pb−Free)

TO−92 2000 Units / Bag

(Pb−Free)

TO−92 2000 / Tape & Reel

(Pb−Free)

TO−92 2000 / Tape & Reel

(Pb−Free)

(Pb−Free)

SOIC−8 98 Units / Rail

(Pb−Free)

(Pb−Free)

SOIC−8 98 Units / Rail

(Pb−Free)

(Pb−Free)

TO−92 2000 Units / Bag

(Pb−Free)

(Pb−Free)

Shipping

98 Units / Rail

2500 / Tape & Reel

98 Units / Rail

2500 / Tape & Reel

2000 Units / Bag

2000 Units / Bag

2000 / Tape & Reel

2000 / Tape & Reel

2000 Units / Fan−Fold

98 Units / Rail

2500 / Tape & Reel

98 Units / Rail

2500 / Tape & Reel

2000 Units / Bag

2000 / Tape & Reel

†

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6

LM285, LM385B

ORDERING INFORMATION

Reverse Break−Down

Device

LM385BZ−2.5
LM385BZ−2.5G TO−92

LM385BZ−2.5RA TO−92 2000 / Tape & Reel
LM385BZ−2.5RAG TO−92

LM385D−1.2
LM385D−1.2G SOIC−8

LM385D−1.2R2 SOIC−8 2500 / Tape & Reel
LM385D−1.2R2G SOIC−8

LM385D−2.5
LM385D−2.5G SOIC−8

LM385D−2.5R2 SOIC−8 2500 / Tape & Reel
LM385D−2.5R2G SOIC−8

LM385Z−1.2
LM385Z−1.2G TO−92

LM385Z−1.2RA TO−92 2000 / Tape & Reel
LM385Z−1.2RAG TO−92

LM385Z−1.2RP TO−92 2000 / Ammo Box
LM385Z−1.2RPG TO−92

LM385Z−2.5
LM385Z−2.5G TO−92

LM385Z−2.5RP TO−92 2000 / Ammo Box
LM385Z−2.5RPG TO−92

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

TA = 0°C to +70°C

VoltageOperating Temperature Range

2.500 V

1.235 V

2.500 V

1.235 V

2.500 V

Package

TO−92 2000 Units / Bag

(Pb−Free)

(Pb−Free)

SOIC−8 98 Units / Rail

(Pb−Free)

(Pb−Free)

SOIC−8 98 Units / Rail

(Pb−Free)

(Pb−Free)

TO−92 2000 Units / Bag

(Pb−Free)

(Pb−Free)

(Pb−Free)

TO−92 2000 Units / Bag

(Pb−Free)

(Pb−Free)

Shipping

2000 Units / Bag

2000 / Tape & Reel

98 Units / Rail

2500 / Tape & Reel

98 Units / Rail

2500 / Tape & Reel

2000 Units / Bag

2000 / Tape & Reel

2000 / Ammo Box

2000 Units / Bag

2000 / Ammo Box

†

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7

LM285, LM385B

PACKAGE DIMENSIONS

SOIC−8 NB

CASE 751−07

ISSUE AG

−Y−

−Z−

−X−
A

58

B

1

S

0.25 (0.010)

4

M

M

Y

K

NOTES:

1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.

5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.

6. 751−01 THRU 751−06 ARE OBSOLETE. NEW
STANDARD IS 751−07.

G

MILLIMETERS

C

SEATING
PLANE

0.10 (0.004)

H

D

0.25 (0.010) Z

M

Y

SXS

N

X 45

_

M

J

DIMAMIN MAX MIN MAX

4.80 5.00 0.189 0.197

B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010
J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050

M 0 8 0 8

____

N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244

INCHES

SOLDERING FOOTPRINT*

1.52

0.060

7.0

0.275

0.6

0.024

4.0

0.155

1.270

0.050

SCALE 6:1

ǒ

inches

mm

Ǔ

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.

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8

LM285, LM385B

r

PACKAGE DIMENSIONS

TO−92 (TO−226)

CASE 29−11

ISSUE AL

SEATING
PLANE

A

B

R

P

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.

4. LEAD DIMENSION IS UNCONTROLLED IN P AND
BEYOND DIMENSION K MINIMUM.

L

MILLIMETERSINCHES

XX

V

1

K

D

G

H

J

C

SECTION X−X

N

DIM MIN MAX MIN MAX

A 0.175 0.205 4.45 5.20
B 0.170 0.210 4.32 5.33
C 0.125 0.165 3.18 4.19
D 0.016 0.021 0.407 0.533
G 0.045 0.055 1.15 1.39
H 0.095 0.105 2.42 2.66
J 0.015 0.020 0.39 0.50
K 0.500 −−− 12.70 −−−
L 0.250 −−− 6.35 −−−
N 0.080 0.105 2.04 2.66
P −−− 0.100 −−− 2.54
R 0.115 −−− 2.93 −−−
V 0.135 −−− 3.43 −−−

N

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to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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LM285/D

9