© Semiconductor Components Industries, LLC, 2008
March, 2008 - Rev. 8
1Publication Order Number:
LM285/D
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
Figure 1. Representative Schematic Diagram
Open
for 1.235 V
10 k
Cathode
Anode
100 k
500 W
600 k
600 k
425 k
74.3 k
8.45 k
600 k
360 k
Open
for 2.5 V
-
+
LM385-1.2
1.235 V
3.3 k
1.5 V
Battery
Standard Application
SOIC-8
D SUFFIX
CASE 751
http://onsemi.com
(Bottom View)
312
8
7
6
5
Cathode
N.C.
N.C.
N.C.
4
3
2
Anode
N.C.
N.C.
1
N.C.
N.C.
Cathode
Anode
TO-92
(TO-226)
Z SUFFIX
CASE 29
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
ORDERING INFORMATION
MARKING
DIAGRAMS
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
LMy85
Z-xxx
ALYWWG
G
1
8
(Note: Microdot may be in either location)
y85-z
ALYW
G
1
8
LM285, LM385B
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2
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted)
Rating Symbol Value Unit
Reverse Current IR30 mA
Forward Current IF10 mA
Operating Ambient Temperature Range
LM285
LM385
TA-40 to +85
0 to +70
°C
Operating Junction Temperature TJ+150 °C
Storage Temperature Range Tstg -65 to + 150 °C
Electrostatic Discharge Sensitivity (ESD)
Human Body Model (HBM)
Machine Model (MM)
Charged Device Model (CDM)
ESD
4000
400
2000
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted)
Characteristic Symbol
LM285-1.2 LM385-1.2/LM385B-1.2
Unit
Min Typ Max Min Typ Max
Reverse Breakdown Voltage (IRmin v IR v 20 mA)
LM285-1.2/LM385B-1.2
TA = Tlow to Thigh (Note 1)
LM385-1.2
TA = Tlow to Thigh (Note 1)
V(BR)R
1.223
1.200
-
-
1.235
-
-
-
1.247
1.270
-
-
1.223
1.210
1.205
1.192
1.235
-
1.235
-
1.247
1.260
1.260
1.273
V
Minimum Operating Current
TA = 25°C
TA = Tlow to Thigh (Note 1)
IRmin
-
-
8.0
-
10
20 -
8.0
-
15
20
mA
Reverse Breakdown Voltage Change with Current
IRmin v IR v 1.0 mA, TA = +25°C
TA = Tlow to Thigh (Note 1)
1.0 mA v IR v 20 mA, TA = +25°C
TA = Tlow to Thigh (Note 1)
DV(BR)R
-
-
-
-
-
-
-
-
1.0
1.5
10
20
-
-
-
-
-
-
-
-
1.0
1.5
20
25
mV
Reverse Dynamic Impedance
IR = 100 mA, TA = +25°C
Z
- 0.6 - - 0.6 -
W
Average Temperature Coefficient
10 mA v IR v 20 mA, TA = Tlow to Thigh (Note 1)
DV(BR)/DT
- 80 - - 80 -
ppm/°C
Wideband Noise (RMS)
IR = 100 mA, 10 Hz v f v 10 kHz
n
- 60 - - 60 -
mV
Long Term Stability
IR = 100 mA, TA = +25°C ± 0.1°C
S
- 20 - - 20 -
ppm/kHR
Reverse Breakdown Voltage (IRmin v IR v 20 mA)
LM285-2.5/LM385B-2.5
TA = Tlow to Thigh (Note 1)
LM385-2.5
TA = Tlow to Thigh (Note 1)
V(BR)R
2.462
2.415
-
-
2.5
-
-
-
2.538
2.585
-
-
2.462
2.436
2.425
2.400
2.5
-
2.5
-
2.538
2.564
2.575
2.600
V
Minimum Operating Current
TA = 25°C
TA = Tlow to Thigh (Note 1)
IRmin -
-
13
-
20
30
-
-
13
-
20
30
mA
1. Tlow = -40°C for LM285-1.2, LM285-2.5
Thigh =+85°C for LM285-1.2, LM285-2.5
Tlow = 0°C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
Thigh =+70°C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
LM285, LM385B
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3
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted)
Characteristic Symbol
LM285-1.2 LM385-1.2/LM385B-1.2
Unit
Min Typ Max Min Typ Max
Reverse Breakdown Voltage Change with Current
IRmin v IR v 1.0 mA, TA = +25°C
TA = Tlow to Thigh (Note 2)
1.0 mA v IR v 20 mA, TA = +25°C
TA = Tlow to Thigh (Note 2)
DV(BR)R
-
-
-
-
-
-
-
-
1.0
1.5
10
20
-
-
-
-
-
-
-
-
2.0
2.5
20
25
mV
Reverse Dynamic Impedance
IR = 100 mA, TA = +25°C
Z
- 0.6 - - 0.6 -
W
Average Temperature Coefficient
20 mA v IR v 20 mA, TA = Tlow to Thigh (Note 2)
DV(BR)/DT
- 80 - - 80 -
ppm/°C
Wideband Noise (RMS)
IR = 100 mA, 10 Hz v f v 10 kHz
n
- 120 - - 120 -
mV
Long Term Stability
IR = 100 mA, TA = +25°C ± 0.1°C
S
- 20 - - 20 -
ppm/kHR
2. Tlow = -40°C for LM285-1.2, LM285-2.5
Thigh =+85°C for LM285-1.2, LM285-2.5
Tlow = 0°C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
Thigh =+70°C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
LM285, LM385B
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4
1.1
t, TIME (ms)
0 1.00.90.80.70.60.30.20.1
1.25
1.50
0.75
0.50
0
5.0
0.25
10
0
1.00
OUTPUT (V)INPUT (V)
Input
DUT
Output
100 k
√
100
875
1.0K 100k10K10
0
125
250
375
750
625
500
f, FREQUENCY (Hz)
en, NOISE (nV/ Hz)
125
TA, AMBIENT TEMPERATURE (°C)
1.210
1.220
1.230
1.240
1.250
1007550025-25-50
V(BR)R, REVERSE VOLTAGE (V)
100.01 1001.00.1
1.2
1.0
0.8
0.6
0.4
0.2
0
IF, FORWARD CURRENT (mA)
VF, FORWARD VOLTAGE (V)
TYPICAL PERFORMANCE CURVES FOR LM285-1.2/385-1.2/385B-1.2
0.2 0.4 0.6 0.8 1.0 1.2
10
1.4
100
1.0
0.1 0
V(BR), REVERSE VOLTAGE (V)
, REVERSE CURRENT (A)μIR
0.1 1.0 10 1000.01
8.0
6.0
4.0
2.0
0
-2.0
10
IR, REVERSE CURRENT (mA)
V(BR)R, REVERSE VOLTAGE CHANGE (mV)Δ
TA = +85°C
+25°C-40°C
TA = +85°C
+25°C
-40°C
TA = -40°C
+25°C
+85°C
IR = 100 mA
Figure 2. Reverse Characteristics Figure 3. Reverse Characteristics
Figure 4. Forward Characteristics Figure 5. Temperature Drift
Figure 6. Noise Voltage Figure 7. Response Time
LM285, LM385B
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5
V(BR), REVERSE VOLTAGE (V)
1.1
t, TIME (ms)
0 1.00.90.80.70.60.30.20.1
2.50
3.00
1.50
1.00
0
5.0
0.50
10
0
2.00
OUTPUT (V)INPUT (V)
Input
DUT
Output
100 k
√
100 1.0K 100k10K10
0
250
500
750
1500
1250
1000
f, FREQUENCY (Hz)
en, NOISE (nV/ Hz)
125
TA, AMBIENT TEMPERATURE (°C)
2.450
2.470
2.490
2.510
2.520
1007550025-25-50
V(BR)R, REVERSE VOLTAGE (V)
100.01 1001.00.1
1.2
1.0
0.8
0.6
0.4
0.2
0
IF, FORWARD CURRENT (mA)
VF, FORWARD VOLTAGE (V)
TYPICAL PERFORMANCE CURVES FOR LM285-2.5/385-2.5/385B-2.5
0.5 1.0 1.5 2.0 2.5 3.0
10
3.5
100
1.0
0.1 0
Figure 8. Reverse Characteristics
, REVERSE CURRENT (A)μIR
Figure 9. Reverse Characteristics
0.1 1.0 10 1000.01
8.0
6.0
4.0
2.0
0
-2.0
10
IR, REVERSE CURRENT (mA)
V(BR)R, REVERSE VOLTAGE CHANGE (mV)Δ
TA = +85°C
+25°C
-40°C
TA = +85°C
+25°C-40°C
Figure 10. Forward Characteristics
TA = -40°C
+25°C
+85°C
Figure 11. Temperature Drift
IR = 100 mA
Figure 12. Noise Voltage Figure 13. Response Time
2.460
2.480
2.500
LM285, LM385B
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6
ORDERING INFORMATION
Device Operating Temperature Range
Reverse Break-Down
Voltage Package Shipping†
LM285D-1.2
TA = -40°C to +85°C
1.235 V
SOIC-8 98 Units / Rail
LM285D-1.2G SOIC-8
(Pb-Free)
98 Units / Rail
LM285D-1.2R2 SOIC-8 2500 / Tape & Reel
LM285D-1.2R2G SOIC-8
(Pb-Free)
2500 / Tape & Reel
LM285D-2.5
2.500 V
SOIC-8 98 Units / Rail
LM285D-2.5G SOIC-8
(Pb-Free)
98 Units / Rail
LM285D-2.5R2 SOIC-8 2500 / Tape & Reel
LM285D-2.5R2G SOIC-8
(Pb-Free)
2500 / Tape & Reel
LM285Z-1.2
1.235 V
TO-92 2000 Units / Bag
LM285Z-1.2G TO-92
(Pb-Free)
2000 Units / Bag
LM285Z-2.5
2.500 V
TO-92 2000 Units / Bag
LM285Z-2.5G TO-92
(Pb-Free)
2000 Units / Bag
LM285Z-1.2RA
1.235 V
TO-92 2000 / Tape & Reel
LM285Z-1.2RAG TO-92
(Pb-Free)
2000 / Tape & Reel
LM285Z-2.5RA
2.500 V
TO-92 2000 / Tape & Reel
LM285Z-2.5RAG TO-92
(Pb-Free)
2000 / Tape & Reel
LM285Z-2.5RP TO-92 2000 Units / Fan-Fold
LM285Z-2.5RPG TO-92
(Pb-Free)
2000 Units / Fan-Fold
LM385BD-1.2
TA = 0°C to +70°C
1.235 V
SOIC-8 98 Units / Rail
LM385BD-1.2G SOIC-8
(Pb-Free)
98 Units / Rail
LM385BD-1.2R2 SOIC-8 2500 / Tape & Reel
LM385BD-1.2R2G SOIC-8
(Pb-Free)
2500 / Tape & Reel
LM385BD-2.5
2.500 V
SOIC-8 98 Units / Rail
LM385BD-2.5G SOIC-8
(Pb-Free)
98 Units / Rail
LM385BD-2.5R2 SOIC-8 2500 / Tape & Reel
LM385BD-2.5R2G SOIC-8
(Pb-Free)
2500 / Tape & Reel
LM385BZ-1.2
1.235 V
TO-92 2000 Units / Bag
LM385BZ-1.2G TO-92
(Pb-Free)
2000 Units / Bag
LM385BZ-1.2RA TO-92 2000 / Tape & Reel
LM385BZ-1.2RAG TO-92
(Pb-Free)
2000 / Tape & Reel
†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.
LM285, LM385B
http://onsemi.com
7
ORDERING INFORMATION
Device Shipping†
Package
Reverse Break-Down
VoltageOperating Temperature Range
LM385BZ-2.5
TA = 0°C to +70°C
2.500 V
TO-92 2000 Units / Bag
LM385BZ-2.5G TO-92
(Pb-Free)
2000 Units / Bag
LM385BZ-2.5RA TO-92 2000 / Tape & Reel
LM385BZ-2.5RAG TO-92
(Pb-Free)
2000 / Tape & Reel
LM385D-1.2
1.235 V
SOIC-8 98 Units / Rail
LM385D-1.2G SOIC-8
(Pb-Free)
98 Units / Rail
LM385D-1.2R2 SOIC-8 2500 / Tape & Reel
LM385D-1.2R2G SOIC-8
(Pb-Free)
2500 / Tape & Reel
LM385D-2.5
2.500 V
SOIC-8 98 Units / Rail
LM385D-2.5G SOIC-8
(Pb-Free)
98 Units / Rail
LM385D-2.5R2 SOIC-8 2500 / Tape & Reel
LM385D-2.5R2G SOIC-8
(Pb-Free)
2500 / Tape & Reel
LM385Z-1.2
1.235 V
TO-92 2000 Units / Bag
LM385Z-1.2G TO-92
(Pb-Free)
2000 Units / Bag
LM385Z-1.2RA TO-92 2000 / Tape & Reel
LM385Z-1.2RAG TO-92
(Pb-Free)
2000 / Tape & Reel
LM385Z-1.2RP TO-92 2000 / Ammo Box
LM385Z-1.2RPG TO-92
(Pb-Free)
2000 / Ammo Box
LM385Z-2.5
2.500 V
TO-92 2000 Units / Bag
LM385Z-2.5G TO-92
(Pb-Free)
2000 Units / Bag
LM385Z-2.5RP TO-92 2000 / Ammo Box
LM385Z-2.5RPG TO-92
(Pb-Free)
2000 / Ammo Box
†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.
LM285, LM385B
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8
PACKAGE DIMENSIONS
TO-92 (TO-226)
CASE 29-11
ISSUE AM
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.
R
A
P
J
L
B
K
G
H
SECTION X-X
C
V
D
N
N
XX
SEATING
PLANE DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.175 0.205 4.45 5.20
B0.170 0.210 4.32 5.33
C0.125 0.165 3.18 4.19
D0.016 0.021 0.407 0.533
G0.045 0.055 1.15 1.39
H0.095 0.105 2.42 2.66
J0.015 0.020 0.39 0.50
K0.500 --- 12.70 ---
L0.250 --- 6.35 ---
N0.080 0.105 2.04 2.66
P--- 0.100 --- 2.54
R0.115 --- 2.93 ---
V0.135 --- 3.43 ---
1
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. CONTOUR OF PACKAGE BEYOND
DIMENSION R IS UNCONTROLLED.
4. LEAD DIMENSION IS UNCONTROLLED IN P
AND BEYOND DIMENSION K MINIMUM.
RA
P
J
B
K
G
SECTION X-X
C
V
D
N
XX
SEATING
PLANE DIM MIN MAX
MILLIMETERS
A4.45 5.20
B4.32 5.33
C3.18 4.19
D0.40 0.54
G2.40 2.80
J0.39 0.50
K12.70 ---
N2.04 2.66
P1.50 4.00
R2.93 ---
V3.43 ---
1
T
STRAIGHT LEAD
BULK PACK
BENT LEAD
TAPE & REEL
AMMO PACK
LM285, LM385B
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9
PACKAGE DIMENSIONS
SOIC-8 NB
CASE 751-07
ISSUE AJ
SEATING
PLANE
1
4
58
N
J
X 45 _
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.
A
BS
D
H
C
0.10 (0.004)
DIM
A
MIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B3.80 4.00 0.150 0.157
C1.35 1.75 0.053 0.069
D0.33 0.51 0.013 0.020
G1.27 BSC 0.050 BSC
H0.10 0.25 0.004 0.010
J0.19 0.25 0.007 0.010
K0.40 1.27 0.016 0.050
M0 8 0 8
N0.25 0.50 0.010 0.020
S5.80 6.20 0.228 0.244
-X-
-Y-
G
M
Y
M
0.25 (0.010)
-Z-
Y
M
0.25 (0.010) ZSXS
M
____
1.52
0.060
7.0
0.275
0.6
0.024
1.270
0.050
4.0
0.155
ǒmm
inchesǓ
SCALE 6:1
*For additional information on our Pb-Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
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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Phone: 81-3-5773-3850
LM285/D
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