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Part Number LM385B

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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
µ
A 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-226AA
plastic case and are available in two voltage versions of 1.235 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 and 2.500 V.
·
Operating Current from 10
µ
A to 20 mA
·
1.0%, 1.5%, 2.0% and 3.0% Initial Tolerance Grades
·
Low Temperature Coefficient
·
1.0
Dynamic Impedance
·
Surface Mount Package Available
Representative Schematic Diagram
Open
for 1.235 V
10 k
Cathode
Anode
100 k
500
600 k
600 k
425 k
74.3 k
8.45 k
600 k
360 k
Open
for 2.5 V
©
Semiconductor Components Industries, LLC, 2003
April, 2003 - Rev. 4
1
Publication Order Number:
LM285/D
ORDERING INFORMATION
-
+
LM385-1.2
1.235 V
3.3 k
1.5 V
Battery
Standard Application
Device
Operating
Temperature
Range
Tolerance
LM285D-1.2
LM285Z-1.2
T
A
= - 40
°
to
+85
°
C
±
1.0%
LM285D-2.5
LM285Z-2.5
LM385BD-1.2
LM385BZ-1.2
LM385D-1.2
LM385Z-1.2
LM385BD-2.5
LM385BZ-2.5
LM385D-2.5
LM385Z-2.5
Reverse
Break-
down
Voltage
1.235 V
±
1.5%
2.500 V
T
A
= 0
°
to
+70
°
C
±
1.0%
1.235 V
±
2.0%
1.235 V
±
1.5%
2.500 V
±
3.0%
2.500 V
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D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO-8)
(Bottom View)
1
3
2
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
Z SUFFIX
PLASTIC PACKAGE
CASE 29
LM285, LM385B
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2
MAXIMUM RATINGS
(T
A
= 25
°
C, unless otherwise noted)
Rating
Symbol
Value
Unit
Reverse Current
I
R
30
mA
Forward Current
I
F
10
mA
Operating Ambient Temperature Range
T
A
°
C
LM285
LM385
- 40 to + 85
0 to +70
Operating Junction Temperature
T
J
+ 150
°
C
Storage Temperature Range
T
stg
- 65 to + 150
°
C
ELECTRICAL CHARACTERISTICS
(T
A
= 25
°
C, unless otherwise noted)
LM285-1.2
LM385-1.2 /LM385B-1.2
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Reverse Breakdown Voltage (I
Rmin
p
I
R
p
20 mA)
V
(BR)R
V
LM285-1.2/LM385B-1.2
1.223
1.235
1.247
1.223
1.235
1.247
T
A
= T
low
to T
high
(Note 1)
1.200
-
1.270
1.210
-
1.260
LM385-1.2
-
-
-
1.205
1.235
1.260
T
A
= T
low
to T
high
(Note 1)
-
-
-
1.192
-
1.273
Minimum Operating Current
I
Rmin
m
A
T
A
= 25
°
C
-
8.0
10
-
8.0
15
T
A
= T
low
to T
high
(Note 1)
-
-
20
-
-
20
Reverse Breakdown Voltage Change with Current
V
(BR)R
mV
I
Rmin
p
I
R
p
1.0 mA, T
A
= +25
°
C
-
-
1.0
-
-
1.0
T
A
= T
low
to T
high
(Note 1)
-
-
1.5
-
-
1.5
1.0 mA
p
I
R
p
20 mA, T
A
= +25
°
C
-
-
10
-
-
20
T
A
= T
low
to T
high
(Note 1)
-
-
20
-
-
25
Reverse Dynamic Impedance
Z
0.6
-
-
0.6
-
W
I
R
= 100
µ
A, T
A
= +25
°
C
Average Temperature Coefficient
V
(BR)
/
T
-
80
-
-
80
-
ppm/
°
C
10
µ
A
p
I
R
p
20 mA, T
A
= T
low
to T
high
(Note 1)
Wideband Noise (RMS)
n
-
60
-
-
60
-
m
V
I
R
= 100
µ
A, 10 Hz
p
f
p
10 kHz
Long Term Stability
S
-
20
-
-
20
-
ppm/
I
R
= 100
µ
A, T
A
= +25
°
C
±
0.1
°
C
kHR
LM285, LM385B
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3
ELECTRICAL CHARACTERISTICS
(T
A
= 25
°
C, unless otherwise noted)
LM285-2.5
LM385-2.5 /LM385B-2.5
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Reverse Breakdown Voltage (I
Rmin
p
I
R
p
20 mA)
V
(BR)R
V
LM285-2.5/LM385B-2.5
2.462
2.5
2.538
2.462
2.5
2.538
T
A
= T
low
to T
high
(Note 1)
2.415
-
2.585
2.436
-
2.564
LM385-2.5
-
-
-
2.425
2.5
2.575
T
A
= T
low
to T
high
(Note 1)
-
-
-
2.400
-
2.600
Minimum Operating Current
I
Rmin
µ
A
T
A
= 25
°
C
-
13
20
-
13
20
T
A
= T
low
to T
high
(Note 1)
-
-
30
-
-
30
Reverse Breakdown Voltage Change with Current
V
(BR)R
mV
I
Rmin
p
I
R
p
1.0 mA, T
A
= +25
°
C
-
-
1.0
-
-
2.0
T
A
= T
low
to T
high
(Note 1)
-
-
1.5
-
-
2.5
1.0 mA
p
I
R
p
20 mA, T
A
= +25
°
C
-
-
10
-
-
20
T
A
= T
low
to T
high
(Note 1)
-
-
20
-
-
25
Reverse Dynamic Impedance
Z
0.6
-
-
0.6
-
W
I
R
= 100
µ
A, T
A
= +25
°
C
Average Temperature Coefficient
V
(BR)
/
T
-
80
-
-
80
-
ppm/
°
C
20
µ
A
p
I
R
p
20 mA, T
A
= T
low
to T
high
(Note 1)
Wideband Noise (RMS)
n
-
120
-
-
120
-
µ
V
I
R
= 100
µ
A, 10 Hz
p
f
p
10 kHz
Long Term Stability
S
-
20
-
-
20
-
ppm/
I
R
= 100
µ
A, T
A
= +25
°
C
±
0.1
°
C
kHR
NOTES: 1. T
low
= - 40
°
C for LM285-1.2, LM285-2.5
T
high
= +85
°
C for LM285-1.2, LM285-2.5
= 0
°
C for LM385-1.2, LM385B-1.2, LM385-2.5, LM385B-2.5
T
high
= +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
1.0
0.9
0.8
0.7
0.6
0.3
0.2
0.1
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
1.0 K
100 k
10 K
10
0
125
250
375
750
625
500
f, FREQUENCY (Hz)
e
n
, NOISE (nV/
Hz)
125
T
A
, AMBIENT TEMPERATURE (
°
C)
1.210
1.220
1.230
1.240
1.250
100
75
50
0
25
-25
-50
V
(BR)R
, REVERSE VOL
T
AGE (V)
10
0.01
100
1.0
0.1
1.2
1.0
0.8
0.6
0.4
0.2
0
I
F
, FORWARD CURRENT (mA)
V
F, FOR
W
ARD VOL
T
AGE (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)
µ
I R
0.1
1.0
10
100
0.01
8.0
6.0
4.0
2.0
0
-2.0
10
I
R
, REVERSE CURRENT (mA)
V
(BR)R
, REVERSE VOL
T
AGE CHANGE (mV)
T
A
= +85
°
C
+25
°
C
-40
°
C
T
A
= +85
°
C
+25
°
C
-40
°
C
T
A
= -40
°
C
+25
°
C
+85
°
C
I
R
= 100
µ
A
Figure 1. Reverse Characteristics
Figure 2. Reverse Characteristics
Figure 3. Forward Characteristics
Figure 4. Temperature Drift
Figure 5. Noise Voltage
Figure 6. Response Time
LM285, LM385B
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5
V(
BR)
, REVERSE VOLTAGE (V)
1.1
t, TIME (ms)
0
1.0
0.9
0.8
0.7
0.6
0.3
0.2
0.1
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
1.0 K
100 k
10 K
10
0
250
500
750
1500
1250
1000
f, FREQUENCY (Hz)
e
n
, NOISE (nV/
Hz)
125
T
A
, AMBIENT TEMPERATURE (
°
C)
2.450
2.470
2.490
2.510
2.520
100
75
50
0
25
-25
-50
V
(BR)R
, REVERSE VOL
T
AGE (V)
10
0.01
100
1.0
0.1
1.2
1.0
0.8
0.6
0.4
0.2
0
I
F
, FORWARD CURRENT (mA)
V
F, FOR
W
ARD VOL
T
AGE (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 7. Reverse Characteristics
, REVERSE CURRENT
(A)
µ
I R
Figure 8. Reverse Characteristics
0.1
1.0
10
100
0.01
8.0
6.0
4.0
2.0
0
-2.0
10
I
R
, REVERSE CURRENT (mA)
V
(BR)R
, REVERSE VOL
T
AGE CHANGE (mV)
T
A
= +85
°
C
+25
°
C
-40
°
C
T
A
= +85
°
C
+25
°
C
-40
°
C
Figure 9. Forward Characteristics
T
A
= -40
°
C
+25
°
C
+85
°
C
Figure 10. Temperature Drift
I
R
= 100
µ
A
Figure 11. Noise Voltage
Figure 12. Response Time
2.460
2.480
2.500
LM285, LM385B
http://onsemi.com
6
PACKAGE DIMENSIONS
PLASTIC PACKAGE
Z SUFFIX
CASE 29-11
ISSUE AL
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
X X
SEATING
PLANE
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
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
---
1
SEATING
PLANE
1
4
5
8
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
B
S
D
H
C
0.10 (0.004)
DIM
A
MIN
MAX
MIN
MAX
INCHES
4.80
5.00
0.189
0.197
MILLIMETERS
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
-X-
-Y-
G
M
Y
M
0.25 (0.010)
-Z-
Y
M
0.25 (0.010)
Z
S
X
S
M
_
_
_
_
PLASTIC PACKAGE
D SUFFIX
CASE 751-07
ISSUE AA
LM285, LM385B
http://onsemi.com
7
Notes
LM285, LM385B
http://onsemi.com
8
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changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
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PUBLICATION ORDERING INFORMATION
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2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051
Phone: 81-3-5773-3850
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local
Sales Representative.
LM285/D
SENSEFET is a trademark of Semiconductor Components Industries, LLC.
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