LM4041DIM3-ADJ [MICREL]
Precision Micropower Shunt Voltage Reference; 精密微功耗并联型电压基准
| 型号： | LM4041DIM3-ADJ |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Precision Micropower Shunt Voltage Reference |
| 文件： | 总16页 (文件大小：108K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM4040/4041
Precision Micropower Shunt Voltage Reference
General Description
Features
Ideal for space critical applications, the LM4040 and LM4041
precision voltage references are available in the subminia-
ture (3mm × 1.3mm) SOT-23 surface-mount package.
• Small SOT-23 package
• No output capacitor required
• Tolerates capacitive loads
• Fixed reverse breakdown voltages of 1.225, 2.500V,
4.096V and 5.000V
• Adjustable reverse breakdown version
• Contact Micrel for parts with extended temperature
range.
The LM4040 is the available in fixed reverse breakdown
voltages of 2.500V, 4.096V and 5.000V. The LM4041 is
available with a fixed 1.225V or an adjustable reverse break-
down voltage.
The LM4040 and LM4041’s advanced design eliminates the
need for an external stabilizing capacitor while ensuring
stability with any capacitive load, making them easy to use.
Key Specifications
• Output voltage tolerance (A grade, 25°C) .. ±0.1% (max)
The minimum operating current ranges from 60µA for the
LM4041-1.2 to 74µA for the LM4040-5.0. LM4040 versions
have a maximum operating current of 15mA. LM4041
versions have a maximum operating current of 12mA.
• Low output noise (10Hz to 100Hz)
LM4040 ................................................ 35µV
LM4041 ................................................ 20µV
• Wide operating current range
(typ)
(typ)
RMS
RMS
LM4040 ................................................ 60µA to 15mA
LM4041 ................................................ 60µA to 12mA
• Industrial temperature range .................. –40°C to +85°C
• Low temperature coefficient ................100ppm/°C (max)
The LM4040 and LM4041 utilizes zener-zap reverse break-
down voltage trim during wafer sort to ensure that the prime
parts have an accuracy of better than ±0.1% (A grade) at
25°C. Bandgapreferencetemperaturedriftcurvaturecorrec-
tion and low dynamic impedance ensure stable reverse
breakdown voltage accuracy over a wide range of operating
temperatures and currents.
Applications
• Battery-Powered Equipment
• Data Acquisition Systems
• Instrumentation
• Process Control
• Energy Management
• Product Testing
• Automotive Electronics
• Precision Audio Components
Typical Applications
VS
VS
RS
VR
VO
IQ + IL
RS
IL
R1
VO
VR
VO = 1.233 (R2/R1 + 1)
LM4041
Adjustable
LM4040
LM4041
IQ
R2
Figure 1. LM4040, LM4041 Fixed
Shunt Regulator Application
Figure 2. LM4041 Adjustable
Shunt Regulator Application
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
January 2000
1
LM4040/4041
LM4040/4041
Micrel
Pin Configuration
1
2
1
2
+
FB
+
3
3 –
–
Pin 3 must float or
be connected to pin 2.
Fixed Version
SOT-23 (M3) Package
Top View
Adjustable Version
SOT-23 (M3) Package
Top View
Ordering Information
Part Number *
Voltage
Accuracy,
Part Number *
Voltage
Accuracy,
Temp. Coefficient
Temp. Coefficient
±0.1%, 100ppm/°C
±0.2%, 100ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
LM4040AIM3-2.5
LM4040BIM3-2.5
LM4040CIM3-2.5
LM4040DIM3-2.5
LM4040AIM3-4.1
LM4040BIM3-4.1
LM4040CIM3-4.1
LM4040DIM3-4.1
LM4040AIM3-5.0
LM4040BIM3-5.0
LM4040CIM3-5.0
LM4040DIM3-5.0
2.500V
2.500V
2.500V
2.500V
4.096V
4.096V
4.096V
4.096V
5.000V
5.000V
5.000V
5.000V
±0.1%, 100ppm/°C
±0.2%, 100ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.1%, 100ppm/°C
±0.2%, 100ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
±0.1%, 100ppm/°C
±0.2%, 100ppm/°C
±0.5%, 100ppm/°C
±1.0%, 150ppm/°C
LM4041AIM3-1.2
LM4041BIM3-1.2
LM4041CIM3-1.2
LM4041DIM3-1.2
LM4041CIM3-ADJ
LM4041DIM3-ADJ
1.225V
1.225V
1.225V
1.225V
1.24V to 10V
1.24V to 10V
SOT-23 Package Markings
Example
Field
Code
Example
Field
Code
Example
Field
Code
R _ _
1st Character R = Reference
_ 2 _
2nd Character 1 = 1.225V
2 = 2.500V
_ _ A
3rd Character A = ±0.1%
B = ±0.2%
Example: R2C represents Reference, 2.500V,
±0.5% (LM4040CIM3-2.5)
4 = 4.096V
C = ±0.5%
5 = 5.000V
D = ±1.0%
A = Adjustable
Note: If 3rd character is omitted, container will
indicate tolerance.
LM4040/4041
2
January 2000
LM4040/4041
Micrel
Functional Diagram
LM4040, LM4041 Fixed
Functional Diagram
LM4041 Adjustable
+
+
VREF
FB
Absolute Maximum Ratings
Operating Ratings (Notes 1 and 2)
Reverse Current.........................................................20mA
Forward Current .........................................................10mA
Temperature Range
(T
≤ T ≤ T
) .......................... –40°C ≤ T ≤ +85°C
MIN
A
MAX A
Reverse Current
Maximum Output Voltage
LM4040-2.5 .......................................... 60µA to 15mA
LM4040-4.1 .......................................... 68µA to 15mA
LM4040-5.0 .......................................... 74µA to 15mA
LM4041-1.2 .......................................... 60µA to 12mA
LM4041-ADJ ........................................ 60µA to 12mA
LM4041-Adjustable ...................................................15V
Power Dissipation at T = 25°C (Note 2) ................306mW
A
Storage Temperature ............................... –65°C to +150°C
Lead Temperature
Vapor phase (60 seconds) .............................. +215°C
Infrared (15 seconds) ...................................... +220°C
ESD Susceptibility
Output Voltage Range
LM4041-ADJ .......................................... 1.24V to 10V
Human Body Model (Note 3) ................................. 2kV
Machine Model (Note 3) ......................................200V
January 2000
3
LM4040/4041
LM4040/4041
Micrel
LM4040-2.5 Electrical Characteristics
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A, B, C, and D designate initial Reverse
Breakdown Voltage tolerance of ±0.1%, ±0.2%, ±0.5%, and ±1.0 respectively.
LM4040AIM3 LM4040BIM3 LM4040CIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
2.500
45
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±2.5
±19
±5.0
±21
±12
±29
mV (max)
mV (max)
I
Minimum Operating Current
µA
µA (max)
µA (max)
RMIN
60
65
60
65
60
65
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
20
15
15
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
100
100
100
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.3
2.5
0.3
mV
mV (max)
mV (max)
R
R
RMIN
R
0.8
1.0
0.8
1.0
0.8
1.0
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
0.6
8.0
0.6
8.0
0.6
8.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
0.8
0.8
0.9
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
35
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4040DIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
2.500
45
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±25
±49
mV (max)
mV (max)
I
Minimum Operating Current
µA
RMIN
65
70
µA (max)
µA (max)
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
20
15
15
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
150
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.3
2.5
0.3
mV
mV (max)
mV (max)
R
R
RMIN
R
1.0
1.2
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
8.0
10.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
1.1
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
35
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4040/4041
4
January 2000
LM4040/4041
Micrel
LM4040-4.1 Electrical Characteristics
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A, B, C, and D designate initial Reverse
Breakdown Voltage tolerance of ±0.1%, ±0.2%, ±0.5%, and ± 1.0% respectively.
LM4040AIM3
LM4040BIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
Limits
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
4.096
50
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±4.1
±31
±8.2
±35
mV (max)
mV (max)
I
Minimum Operating Current
µA
µA (max)
µA (max)
RMIN
68
73
68
73
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
30
20
20
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
100
100
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.5
3.5
0.5
mV
mV (max)
mV (max)
R
R
RMIN
R
0.9
1.2
0.9
1.2
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
7.0
10.0
7.0
10.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
1.0
1.0
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
80
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4040CIM3
LM4040DIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limits)
Limits
Limits
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
4.096
50
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±20
±47
±41
±81
mV (max)
mV (max)
I
Minimum Operating Current
µA
RMIN
68
73
73
78
µA (max)
µA (max)
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
30
20
20
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
100
150
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.5
3.0
0.5
mV
mV (max)
mV (max)
R
R
RMIN
R
0.9
1.2
1.2
1.5
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
7.0
10.0
9.0
13.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
1.0
1.3
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
80
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
January 2000
5
LM4040/4041
LM4040/4041
Micrel
LM4040-5.0 Electrical Characteristics
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A, B, C, and D designate initial Reverse
Breakdown Voltage tolerance of ±0.1%, ±0.2%, ±0.5%, and ± 1.0% respectively.
LM4040AIM3
LM4040BIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
Limits
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
5.000
54
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±5.0
±38
±10
±43
mV (max)
mV (max)
I
Minimum Operating Current
µA
µA (max)
µA (max)
RMIN
74
80
74
80
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
30
20
20
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
100
100
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.5
3.5
0.5
mV
mV (max)
mV (max)
R
R
RMIN
R
1.0
1.4
1.0
1.4
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
8.0
12.0
8.0
12.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
1.1
1.1
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
80
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4040CIM3
LM4040DIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limits)
Limits
Limits
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
5.000
54
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±25
±58
±50
±99
mV (max)
mV (max)
I
Minimum Operating Current
µA
RMIN
74
80
79
85
µA (max)
µA (max)
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
30
20
20
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
100
150
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.5
3.5
0.5
mV
mV (max)
mV (max)
R
R
RMIN
R
1.0
1.3
1.3
1.8
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
8.0
12.0
10.0
15.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
1.1
1.5
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
80
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4040/4041
6
January 2000
LM4040/4041
Micrel
LM4040 Typical Characteristics
Output Impedance
vs. Frequency
Temperature Drift for Different
Average Temperature Coefficient
Output Impedance
vs. Frequency
1k
100
10
+0.5
1k
100
10
IR = IRMIN + 100 µA
IR= 1mA
TJ = 25 °C, ∆IR = IR
IR = 150µA
+0.4
T
= 25 °C, ∆ I = 0.1 I
R
J
R
+0.3
CL = 0
CL= 0
+0.2
VR = 5V
2.5V
12ppm/°C
+0.1
0
CL = 1µF
TANTALUM
VR = 5V
2.5V
CL= 1µF
TANTALUM
-0.1
-0.2
1
1
-22ppm/°C
-0.3
-51ppm/°C
-0.4
XCL
0.1
0.1
100
-0.5
-40 -20
100
1k
10k
100k
1M
0
20 40 60 80 100
1k
10k
100k 1M
FREQUENCY (Hz)
TEMPERATURE (°C)
FREQUENCY (Hz)
Reverse Characteristics and
Minimum Operating Current
Noise Voltage
vs. Frequency
120
10.0
5.0
IR = 200µA
TJ = 25°C
•
100
80
60
40
20
0
Guaranteed
D Suffix
I
RMIN
A, B, C, Suffix
2.0
1.0
0.5
0.2
•
•
•
5V
l
Typica
2.5V
TJ = 25°C
0.1
1
10
100
1k
10k 100k
0
2
4
6
8
10
REVERSE VOLTAGE (V)
FREQUENCY (Hz)
RS
VIN
VR
LM4040
1Hz rate
Test Circuit
LM4040-2.5 RS = 30k
LM4040-5.0
R = 30k
S
10
0
5
0
TJ = 25°C
IJ = 25°C
6
4
2
0
6
4
2
0
0
100 200 300
RESPONSE TIME (µs)
400
0
20
40
60
80
RESPONSE TIME (µs)
January 2000
7
LM4040/4041
LM4040/4041
Micrel
LM4041-1.2 Electrical Characteristics
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A, B, C, and D designate initial Reverse
Breakdown Voltage tolerance of ±0.1%, ±0.2%, ±0.5%, and ± 1.0%, respectively.
LM4041AIM3 LM4041BIM3 LM4041CIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
Limits
Limits
(Note 5)
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
1.225
45
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±1.2
±9.2
±2.4
±10.4
±6
±14
mV (max)
mV (max)
I
Minimum Operating Current
µA
µA (max)
µA (max)
RMIN
60
65
60
65
60
65
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
20
15
15
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
±100
±100
±100
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.7
4.0
0.5
mV
mV (max)
mV (max)
R
R
RMIN
R
1.5
2.0
1.5
2.0
1.5
2.0
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
6.0
8.0
6.0
8.0
6.0
8.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
1.5
1.5
1.5
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
20
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4041DIM3
LM4041EIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
Limits
(Note 5)
(Note 5)
V
Reverse Breakdown Voltage
I
I
= 100µA
= 100µA
1.225
45
V
R
R
R
Reverse Breakdown Voltage
Tolerance
±12
±24
±25
±36
mV (max)
mV (max)
I
Minimum Operating Current
µA
RMIN
65
70
65
70
µA (max)
µA (max)
∆V /∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient
I
I
I
= 10mA
= 1mA
= 100µA
20
15
15
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
R
R
R
±150
±150
∆V /∆I
Reverse Breakdown Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.3
2.5
0.3
mV
mV (max)
mV (max)
R
R
RMIN
R
2.0
2.5
2.0
2.5
1mA ≤ I 15mA
mV
mV (max)
mV (max)
R
8.0
10.0
8.0
10.0
Z
e
Reverse Dynamic Impedance
Wideband Noise
I
I
= 1mA, f = 120Hz
= 0.1 I
Ω
R
R
2.0
2.0
Ω (max)
AC
R
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
35
µV
RMS
∆V
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
R
120
ppm
I
= 100µA
R
LM4040/4041
8
January 2000
LM4040/4041
Micrel
LM4041-Adjustable Electrical Characteristics
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TJ = 25°C unless otherwise specified (SOT-23, see Note 7),
I
RMIN ≤ IR < 12mA, VREF ≤ VOUT ≤ 10V. The grades C and D designate initial Reverse Breakdown Voltage tolerance of ±0.5% and
±1%, respectively for VOUT = 5V.
LM4041CIM3
LM4041DIM3
Symbol Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
Limits
Limits
(Note 5)
(Note 5)
V
Reference Breakdown Voltage
I
V
= 100µA
R
1.233
V
REF
= 5V
OUT
Reference Breakdown Voltage
Tolerance (Note 8)
I
= 100µA
±6.2
±14
±12
±24
mV (max)
mV (max)
R
I
Minimum Operating Current
45
µA
RMIN
60
65
65
70
µA (max)
µA (max)
∆V
Reference Voltage
Change with Operating
Current Change
I
≤ I 1mA
0.7
mV
mV (max)
mV (max)
REF
RMIN
R
/∆I
SOT-23:
≥ 1.6V
1.5
2.0
2.0
2.5
R
V
OUT
(Note 7)
1mA ≤ I 15mA
SOT-23:
2
mV
mV (max)
mV (max)
R
4
6
6
8
V
≥ 1.6V
OUT
(Note 7)
= 1mA
R
∆V
/∆V
Reference Voltage Change
with Output Voltage Change
I
–1.3
mV/V
mV/V (max)
mV/V (max)
REF
–2.0
–2.5
–2.5
–3.0
O
I
Feedback Current
60
nA
FB
100
120
150
200
nA (max)
nA (max)
∆V
/∆T
Average Reference
Voltage Temperature
Coefficient
V
I
= 5V
= 10mA
= 1mA
= 100µA
REF
OUT
20
15
15
ppm/°C
ppm/°C (max)
ppm/°C (max)
R
I
I
±100
±150
R
(Note 8)
R
Z
Dynamic Output Impedance
I
I
= 1mA, f = 120Hz
= 0.1 I
OUT
R
AC
R
V
= V
0.3
2
Ω
OUT
OUT
REF
V
= 10V
Ω (max)
e
Wideband Noise
I
= 100µA
R
N
10Hz ≤ f ≤ 10kHz
20
µV
RMS
∆V
Reference Voltage
Long Term Stability
t = 1000hrs
T = 25°C ±0.1°C
REF
120
ppm
I
= 100µA
R
January 2000
9
LM4040/4041
LM4040/4041
Micrel
LM4040 and LM4041 Electrical Characteristic Notes
Note 1. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the
device is functional, but do not guarantee specific performance limits. For guaranteed specification and test conditions, see the Electrical
Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when
the device is not operated under the listed test conditions.
Note 2. The maximum power dissipation must be derated at elevated temperatures and is dictated by T
(maximum junction temperature), θ
JA
JMAX
(junction to ambient thermal resistance), and T (ambient temperature). The maximum allowable power dissipation at any temperature is
A
PD
T
= (T
– T )/θ or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4040 and LM4041,
= 125°C, and the typical thermal resistance (θ ), when board mounted, is 326°C/W for the SOT-23 package.
MAX
JMAX A JA
JMAX
JA
Note 3. The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor
discharged directly into each pin.
Note 4. Typicals are at T = 25°C and represent most likely parametric norm.
J
Note 5. Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQL)
methods.
Note 6. The boldface (over temperature limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown
Voltage Tolerance ±[(∆V /∆T)(65°C)(V )]. ∆V /∆T is the V temperature coefficient, 65°C is the temperature range from –40°C to the
R
R
R
R
reference point of 25°C, and V is the reverse breakdown voltage. The total over temperature tolerance for the different grades follows:
R
A-grade: ±0.75% = ±0.1% ±100ppm/°C × 65°C
B-grade: ±0.85% = ±0.2% ±100ppm/°C × 65°C
C-grade: ±1.15% = ±0.5% ±100ppm/°C × 65°C
D-grade: ±1.98% = ±1.0% ±150ppm/°C × 65°C
Example: The A-grade LM4040-2.5 has an over temperature Reverse Breakdown Voltage tolerance of ±2.5 × 0.75% = ±19mV.
Note 7. When V
≤ 1.6V, the LM4041-ADJ must operate at reduced I . This is caused by the series resistance of the die attach between the die (–)
R
OUT
output and the package (–) output pin. See the Output Saturation curve in the Typical Performance Characteristics section.
Note 8. Reference voltage and temperature coefficient will change with output voltage. See Typical Performance Characteristics curves.
LM4041 Typical Characteristics
Temperature Drift for Different
Average Temperature Coefficient
Output Impedence
vs. Frequency
Voltage Impedance
+0.5
1k
100
10
1000
800
600
400
200
0
TJ = 25° C
∆IR = 0.1IR
LM4041-1.2
IR = 150µA
+0.4
IR = 200µA
= 25°C
LM4041-1.2
LM4041-1.2
+0.3
T
J
CL= 0
LM4041-ADJ: VOUT = VREF
+0.2
12ppm/°C
+0.1
0
CL= 1µF
TANTALUM
IR= 150µA
-0.1
-0.2
-22ppm/°C
-0.3
1
IR = 1mA
-51ppm/°C
-0.4
XC
-0.5
-40 -20
0.1
0
20 40 60 80 100
1
10
100
1k
10k 100k
100
1k
10k
100k
1M
TEMPERATURE (°C)
FREQUENCY (Hz)
FREQUENCY (Hz)
Reverse Characteristics and
Minimum Operating Current
Reverse Characteristics and
Minimum Operating Current
100
80
60
40
20
0
100
80
60
40
20
0
RS 30k
VIN
1Hz rate
V
R
LM4041-1.2
Typical
Typical
Test Circuit
TJ = 25°C
TJ = 25°C
LM4041-1.2
LM4041-1.2
0
0.4
0.8
1.2
1.6 2.0
0
0.4
0.8
1.2
1.6 2.0
REVERSE VOLTAGE (V)
REVERSE VOLTAGE (V)
LM4040/4041
10
January 2000
LM4040/4041
Micrel
LM4041 Typical Characteristics
Reference Voltage vs. Output
Voltage and Temperature
Feedback Current vs.
Output Voltage and Temperature
Reference Voltage vs.
Temperature and Output Voltage
1.244
1.244
100
LM4041-ADJ
IR = 1mA
LM4041-ADJ
25°C
LM4041-ADJ
85°C
1.240
1.236
1.232
1.228
1.224
1.220
1.240
1.236
1.232
1.228
1.224
1.220
80
60
40
20
0
VOUT = VREF
TJ = 85°C
-40°C
-40°C
VOUT = 5V
VOUT = 10V
TJ = 25°C, -40°C
85°C
0
2
4
6
8
10
-40 -20
0
20 40 60 80 100
0
2
4
6
8
10
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
Output Impedence
vs. Frequency *
Output Impedence
vs. Frequency *
Output Saturation
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1K
100
10
1
1K
100
10
1
LM4041-ADJ
LM4041-ADJ
CL = 0
LM4041-ADJ
T
J = 25 °C
TJ = 25 °C
VADJ = VREF + 5µV
I
R = 1mA
∆IR = 0.1 IR
I
R = 1mA
∆IR = 0.1IR
-40°C
VOUT = 10V
CL = 0
85°C
5V
2.5V
1.23V
VOUT = 10V
5V
CL=1µF
XC
CL=1µF
2.5V
1.23V
25°C
XC
0
100
0
0
2
4
6
8
10
12
1k
10k
100k
1M
100
1k
10k
100k
1M
OUTPUT CURRENT (mA)
FREQUENCY (Hz)
FREQUENCY (Hz)
†
Reverse Characteristics
FB STEPS (V)
IR
0
2
4
6
8
100
80
60
40
20
0
( + )
FB
IR
VOUT
LM4041-ADJ
( – )
2V / step
+
120k
FB
V
CL
–
TJ = 25°C
LM4041-ADJ
†
Reverse Characteristics
Test Circuit
* Output Impedance vs. Freq.
Test Circuit
0
2
4
6
8
10
OUTPUT VOLTAGE (V)
‡
Large Signal Response
+ 15V
5.1k
LM4041-ADJ
TJ = -40°C
-40°C
OUTPUT
INPUT
25°C
85°C
10
8
( + )
INPUT
100k
FB
-40°C
LM4041 - ADJ
( - )
6
V
OUT
4
2
0
‡
Large Signal Response
Test Circuit
0
10
20
30
40
RESPONSE TIME (µs)
January 2000
11
LM4040/4041
LM4040/4041
Micrel
Adjustable Regulator
Applications Information
The LM4041-ADJ’s output voltage can be adjusted to any
value in the range of 1.24V through 10V. It is a function of the
internal reference voltage (V
feedback resistors as shown in Figure 2. The output is found
using the equation
The LM4040 and LM4041 have been designed for stable
operation without the need of an external capacitor con-
nected between the (+) and (–) pins. If a bypass capacitor is
used, the references remain stable.
) and the ratio of the external
REF
Schottky Diode
(1)
V = V
´ [ (R2/R1) + 1 ]
REF
O
LM4040-x.x and LM4041-1.2 in the SOT-23 package have a
parasitic Schottky diode between pin 2 (–) and pin 3 (die
attach interface connect). Pin 3 of the SOT-23 package must
float or be connected to pin 1. LM4041-ADJs use pin 3 as the
(–) output.
where V is the desired output voltage. The actual value of
O
the internal V
is a function of V . The “corrected” V
is
REF
O
REF
determined by
(2)
V
´ = V (∆V
/ ∆V ) + V
REF
O
REF O Y
where V is the desired output voltage. ∆V
/ ∆V is found
O
Conventional Shunt Regulator
O
REF
intheElectricalCharacteristicsandistypically–1.3mV/Vand
In a conventional shunt regulator application (see Figure 1),
V isequalto1.233V. ReplacethevalueofV
´inequation
Y
REF
an external series resistor (R ) is connected between the
S
(1) with the value found using equation (2).
supplyvoltageandtheLM4040-x.xorLM4041-1.2reference.
R determines the current that flows through the load (I ) and
Note that actual output voltage can deviate from that pre-
S
L
dicted using the typical ∆V
/ ∆V in equation (2); for C-
thereference(I ). Sinceloadcurrentandsupplyvoltagemay
REF
O
Q
grade parts, the worst-case ∆V
/ ∆V is –2.5mV/V and
vary, R should be small enough to supply at least the
REF
O
S
V = 1.248V.
minimum acceptable I to the reference even when the
Y
Q
supply voltage is at its minimum and the load current is at its
maximum value. When the supply voltage is at its maximum
and I is at its minimum, R should be large enough so that
the current flowing through the LM4040-x.x is less than
15mA, and the current flowing through the LM4041-1.2 or
LM4041-ADJ is less than 12mA.
Thefollowingexampleshowsthedifferenceinoutputvoltage
resulting from the typical and worst case values of
∆V
/ ∆V :
L
S
REF
O
Let V = +9V. Using the typical values of ∆V
/∆V , V
O REF
O
REF
is 1.223V. Choosing a value of R1 = 10kΩ, R2 = 63.272kΩ.
Using the worst case ∆V / ∆V for the C-grade and D-
REF
O
R is determined by the supply voltage (V ), the load and
grade parts, the output voltage is actually 8.965V and 8.946V
respectively. Thisresultsinpossibleerrorsaslargeas0.39%
for the C-grade parts and 0.59% for the D-grade parts. Once
again, resistor values found using the typical value of
S
S
operating current, (I and I ), and the reference’s reverse
L
Q
breakdown voltage (V ).
R
R = (V – V ) / (I + I )
s
s
R
L
Q
∆V
/ ∆V will work in most cases, requiring no further
REF
O
adjustment.
R1
R1
120k
+
+
λ
FB 120k
FB
D1
LM4041-ADJ
D1
R2
1M
LM4041-
ADJ
R2
1M
–
–
λ
< –12V
> –12V
LED ON
R3
R3
LED ON
200
–5V
Figure 3. Voltage Level Detector
330
–5V
Figure 4. Voltage Level Detector
LM4040/4041
12
January 2000
LM4040/4041
Micrel
VIN
R1
I
VOUT
D1
1N914
R2
VIN
R1
50µA
I
D2
1N914
VOUT
R2
510k
D2
R3
240k
+
+
–
1N457
FB
FB
FB
LM4041-ADJ
LM4041-ADJ
LM4041-ADJ
–
–
+
R4
240k
R3
510k
D1
1N457
Figure 5. Fast Positive Clamp
Figure 6. Bidirectional Clamp
2.4V + ∆V
±2.4V
D1
VIN
VIN
I
R1
I
R1
VOUT
VOUT
D2
1N457
D2
R2
R2
330k
1N457
390k
–
+
FB
LM4041-ADJ
FB
R3
500k
LM4041-ADJ
+
–
R3
1M
+
–
FB
FB
LM4041-ADJ
LM4041-ADJ
–
+
R4
390k
D1
1N457
R4
330k
D1
1N457
Figure 7. Bidirectional Adjustable Clamp
Figure 8. Bidirectional Adjustable Clamp
±18V to ±2.4V
±2.4 to ±6V
0 to 20mA
+ 5V
R1
390Ω
+
± 2%
1N4002
D2
LM4041-ADJ
FB
R2
–
470k
D1*
1
2
3
6
λ
N.C.
5
4
CMOS
N.C.
5µA
4N28
1.24V
R1 4N28 GAIN
ITHRESHOLD
=
+
= 3.2mA
Figure 9. Floating Current Detector
January 2000
13
LM4040/4041
LM4040/4041
Micrel
+15V
R1
+
FB
LM4041-ADJ
–
2N2905
2N
3964
R2
120k
1µA < IOUT = 100mA
1.24V
IOUT
=
R1
Figure 10. Current Source
0 to 20 mA
R1
+5V
+
332Ω
±1%
LM4041-ADJ
–
FB
1N914
D2
1N4002
R3
100k
2N2222
R2
22k
1
2
3
6
D1*
5
4
λ
CMOS
R4
10M
N.C.
= 3.7mA ± 2%
4N28
1.24V
R1
ITHRESHOLD
=
Figure 11. Precision Floating Current Detector
* D1 can be any LED, V = 1.5V to 2.2V at 3mA. D1 may act as an indicator. D1 will
F
be on if I
falls below the threshold current, except with I = O.
THRESHOLD
LM4040/4041
14
January 2000
LM4040/4041
Micrel
Package Information
1.40 (0.055) 2.50 (0.098)
1.19 (0.047) 2.10 (0.083)
C
L
C
L
2.36 (0.093)
2.28 (0.090)
DIMENSIONS:
MM (INCH)
1.15 (0.045)
3.05 (0.120)
2.67 (0.105)
0.76 (0.030)
0.15 (0.006)
0.076 (0.0030)
8°
0°
0.10 (0.004)
0.013 (0.0005)
0.445 (0.0175) TYP 3 PLACES
0.41 (0.016)
0.13 (0.005)
SOT-23 (M3)
January 2000
15
LM4040/4041
LM4040/4041
Micrel
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
LM4040/4041
16
January 2000
相关型号：
LM4041DIM3-ADJT&R
Two Terminal Voltage Reference, 1 Output, 1.233V, Trim/Adjustable, BIPolar, PDSO3, SOT-23, 3 PIN
MICROCHIP
LM4041DIM3ADJ
1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.233V, PDSO3, PLASTIC, TO-236AB, SOT-23, 3 PIN
TI
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