National Semiconductor LM4128, LM4128Q Technical data
October 23, 2008
LM4128/LM4128Q
SOT-23 Precision Micropower Series Voltage Reference
LM4128/LM4128Q SOT-23 Precision Micropower Series Voltage Reference
General Description
Ideal for space critical applications, the LM4128 precision
voltage reference is available in the SOT-23 surface-mount
package. The LM4128’s advanced design eliminates the
need for an external stabilizing capacitor while ensuring stability with capacitive loads up to 10 µF, thus making the
LM4128 easy to use.
Series references provide lower power consumption than
shunt references, since they do not have to idle the maximum
possible load current under no load conditions. This advantage, the low quiescent current (60 µA), and the low dropout
voltage (400 mV) make the LM4128 ideal for battery-powered
solutions.
The LM4128 is available in four grades (A, B, C, and D) for
greater flexibility. The best grade devices (A) have an initial
accuracy of 0.1% with guaranteed temperature coefficient of
75 ppm/°C or less, while the lowest grade parts (D) have an
initial accuracy of 1.0% and a tempco of 100 ppm/°C.
Features
Output voltage initial accuracy 0.1%
■
Low temperature coefficient 75 ppm/°C
■
Low Supply Current, 60 µA
■
Enable pin allowing a 3 µA shutdown mode
■
Up to 20 mA output current
■
Voltage options 1.8V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V
■
Custom voltage options available (1.8V to 4.096V)
■
VIN range of V
■
Stable with low ESR ceramic capacitors
■
SOT23-5 Package
■
−40°C to 125°C junction temperature range
■
LM4128AQ/BQ/CQ/DQ are AEC-Q100 Grade 1 qualified
■
and are manufactured on an Automotive Grade Flow
+ 400 mV to 5.5V @10 mA
REF
Applications
Instrumentation & Process Control
■
Test Equipment
■
Data Acquisition Systems
■
Base Stations
■
Servo Systems
■
Portable, Battery Powered Equipment
■
Automotive & Industrial Electronics
■
Precision Regulators
■
Battery Chargers
■
Communications
■
Medical Equipment
■
Typical Application Circuit
*Note: The capacitor CIN is required and the capacitor C
© 2008 National Semiconductor Corporation 202110 www.national.com
is optional.
OUT
20211001
Connection Diagram
LM4128/LM4128Q
Top View
Ordering Information
Input Output Voltage
Accuracy at 25°C And
Temperature Coefficient
0.1%, 75 ppm/°C (A grade)
0.2%, 75 ppm/°C (B grade)
0.5%, 100 ppm/°C (C grade)
1.0%, 100 ppm/°C max
(D grade)
SOT23-5 Package
NS Package Number MF05A
LM4128 Supplied as
1000 units, Tape and
Reel
LM4128AMF-1.8 LM4128AMFX-1.8 R5AA
LM4128AMF-2.0 LM4128AMFX-2.0 R5BA
LM4128AMF-2.5 LM4128AMFX-2.5 R5CA
LM4128AMF-3.0 LM4128AMFX-3.0 R5DA
LM4128AMF-3.3 LM4128AMFX-3.3 R5EA
LM4128AMF-4.1 LM4128AMFX-4.1 R5FA
LM4128BMF-1.8 LM4128BMFX-1.8 R5AB
LM4128BMF-2.0 LM4128BMFX-2.0 R5BB
LM4128BMF-2.5 LM4128BMFX-2.5 R5CB
LM4128BMF-3.0 LM4128BMFX-3.0 R5DB
LM4128BMF-3.3 LM4128BMFX-3.3 R5EB
LM4128BMF-4.1 LM4128BMFX-4.1 R5FB
LM4128CMF-1.8 LM4128CMFX-1.8 R5AC
LM4128CMF-2.0 LM4128CMFX-2.0 R5BC
LM4128CMF-2.5 LM4128CMFX-2.5 R5CC
LM4128CMF-3.0 LM4128CMFX-3.0 R5DC
LM4128CMF-3.3 LM4128CMFX-3.3 R5EC
LM4128CMF-4.1 LM4128CMFX-4.1 R5FC
LM4128DMF-1.8 LM4128DMFX-1.8 R5AD
LM4128DMF-2.0 LM4128DMFX-2.0 R5BD
LM4128DMF-2.5 LM4128DMFX-2.5 R5CD
LM4128DMF-3.0 LM4128DMFX-3.0 R5DD
LM4128DMF-3.3 LM4128DMFX-3.3 R5ED
LM4128DMF-4.1 LM4128DMFX-4.1 R5FD
LM4128 Supplied as
3000 units, Tape and
20211002
Part Marking Feature
Reel
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LM4128/LM4128Q
Input Output Voltage
Accuracy at 25°C And
Temperature Coefficient
0.1%, 75 ppm/°C
(AQ grade)
0.2%, 75 ppm/°C
(BQ grade)
0.5%, 100 ppm/°C
(CQ grade)
1.0%, 100 ppm/°C max
(DQ grade)
*Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies.
Reliability qualification is compliant with the requirements and temperature grades defined in the AEC-Q100 standard. Automotive grade products are identified
with the letter Q. For more information go to http://www.national.com/automotive.
LM4128 Supplied as
1000 units, Tape and
Reel
LM4128AQ1MF1.8 LM4128AQ1MFX1.8 R6AA AEC-Q100 Grade 1
LM4128AQ1MF2.0 LM4128AQ1MFX2.0 R6BA
LM4128AQ1MF2.5 LM4128AQ1MFX2.5 R6CA
LM4128AQ1MF3.0 LM4128AQ1MFX3.0 R6DA
LM4128AQ1MF3.3 LM4128AQ1MFX3.3 R6EA
LM4128AQ1MF4.1 LM4128AQ1MFX4.1 R6FA
LM4128BQ1MF1.8 LM4128BQ1MFX1.8 R6AB AEC-Q100 Grade 1
LM4128BQ1MF2.0 LM4128BQ1MFX2.0 R6BB
LM4128BQ1MF2.5 LM4128BQ1MFX2.5 R6CB
LM4128BQ1MF3.0 LM4128BQ1MFX3.0 R6DB
LM4128BQ1MF3.3 LM4128BQ1MFX3.3 R6EB
LM4128BQ1MF4.1 LM4128BQ1MFX4.1 R6FB
LM4128CQ1MF1.8 LM4128CQ1MFX1.8 R6AC AEC-Q100 Grade 1
LM4128CQ1MF2.0 LM4128CQ1MFX2.0 R6BC
LM4128CQ1MF2.5 LM4128CQ1MFX2.5 R6CC
LM4128CQ1MF3.0 LM4128CQ1MFX3.0 R6DC
LM4128CQ1MF3.3 LM4128CQ1MFX3.3 R6EC
LM4128CQ1MF4.1 LM4128CQ1MFX4.1 R6FC
LM4128DQ1MF1.8 LM4128DQ1MFX1.8 R6AD AEC-Q100 Grade 1
LM4128DQ1MF2.0 LM4128DQ1MFX2.0 R6BD
LM4128DQ1MF2.5 LM4128DQ1MFX2.5 R6CD
LM4128DQ1MF3.0 LM4128DQ1MFX3.0 R6DD
LM4128DQ1MF3.3 LM4128DQ1MFX3.3 R6ED
LM4128DQ1MF4.1 LM4128DQ1MFX4.1 R6FD
LM4128 Supplied as
3000 units, Tape and
Reel
Part Marking Feature
qualified. Automotive
Grade Production Flow*
qualified. Automotive
Grade Production Flow*
qualified. Automotive
Grade Production Flow*
qualified. Automotive
Grade Production Flow*
Pin Descriptions
Pin # Name Function
1 N/C No connect pin, leave floating
2 GND Ground
3 EN Enable pin
4 VIN Input supply
5 VREF Reference output
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Voltage on any input -0.3 to 6V
Output short circuit duration Indefinite
LM4128/LM4128Q
Power Dissipation (TA = 25°C)
(Note 2) 350 mW
Storage Temperature Range −65°C to 150°C
Vapor Phase (60 sec) 215°C
Infrared (15sec) 220°C
ESD Susceptibility (Note 3)
Human Body Model 2 kV
Operating Ratings
Maximum Input Supply Voltage 5.5V
Maximum Enable Input Voltage V
Maximum Load Current 20mA
Junction Temperature Range (TJ) −40°C to
Lead Temperature (soldering, 10sec) 260°C
Electrical Characteristics
LM4128-1.8 (V
the junction temperature (TJ) range of -40°C to +125°C unless otherwise specified. Minimum and Maximum limits are guaranteed
through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are
provided for reference purposes only. Unless otherwise specified VIN = 5V and I
Symbol Parameter Conditions Min
V
REF
TCV
/ °C (Note6)Temperature Coefficient LM4128A-1.8 75
REF
I
Q
I
Q_SD
ΔV
/ΔV
REF
ΔV
/ΔI
REF
ΔV
REF
VIN - V
REF
V
N
I
SC
V
IL
V
IH
Output Voltage Initial Accuracy
LM4128A-1.8 (A Grade - 0.1%) -0.1 +0.1 %
LM4128B-1.8 (B Grade - 0.2%) -0.2 +0.2
LM4128C-1.8 (C Grade - 0.5%) -0.5 +0.5
LM4128D-1.8 (D Grade - 1.0%) -1.0 +1.0
Supply Current 60 100 µA
Supply Current in Shutdown EN = 0V 3 7 µA
Line Regulation
IN
Load Regulation
LOAD
Long Term Stability (Note 7) 1000 Hrs 50 ppm
Thermal Hysteresis (Note 8)
Dropout Voltage (Note 9) I
Output Noise Voltage 0.1 Hz to 10 Hz 170 µV
Short Circuit Current 75 mA
Enable Pin Maximum Low Input Level 35 %V
Enable Pin Minimum High Input Level 65 %V
= 1.8V) Limits in standard type are for T
OUT
LM4128B-1.8 75
LM4128C-1.8 100
LM4128D-1.8 100
V
+ 400 mV ≤ VIN ≤ 5.5V
REF
0 mA ≤ I
-40°C ≤ TJ ≤ +125°C
= 10 mA 200 400 mV
LOAD
LOAD
= 25°C only, and limits in boldface type apply over
J
= 0A.
LOAD
(Note 4)
Typ
(Note 5)
Max
(Note 4)
30 ppm / V
≤ 20 mA
25 120 ppm / mA
75
IN
+125°C
Unit
ppm / °C
PP
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Electrical Characteristics
LM4128-2.0 (V
over the junction temperature (TJ) range of -40°C to +125°C unless otherwise specified. Minimum and Maximum limits are
guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C,
and are provided for reference purposes only. Unless otherwise specified VIN = 5V and I
Symbol Parameter Conditions Min
V
REF
TCV
/ °C (Note6)Temperature Coefficient LM4128A-2.0 75
REF
I
Q
I
Q_SD
ΔV
/ΔV
REF
ΔV
/ΔI
REF
ΔV
REF
VIN - V
REF
V
N
I
SC
V
IL
V
IH
Output Voltage Initial Accuracy
LM4128A-2.0 (A Grade - 0.1%) -0.1 +0.1 %
LM4128B-2.0 (B Grade - 0.2%) -0.2 +0.2
LM4128C-2.0 (C Grade - 0.5%) -0.5 +0.5
LM4128D-2.0 (D Grade - 1.0%) -1.0 +1.0
Supply Current 60 100 µA
Supply Current in Shutdown EN = 0V 3 7 µA
Line Regulation
IN
Load Regulation
LOAD
Long Term Stability (Note 7) 1000 Hrs 50 ppm
Thermal Hysteresis (Note 8)
Dropout Voltage (Note 9) I
Output Noise Voltage 0.1 Hz to 10 Hz 190 µV
Short Circuit Current 75 mA
Enable Pin Maximum Low Input Level 35 %V
Enable Pin Minimum High Input Level 65 %V
= 2.048V) Limits in standard type are for T
OUT
LM4128B-2.0 75
LM4128C-2.0 100
LM4128D-2.0 100
V
+ 400 mV ≤ VIN ≤ 5.5V
REF
0 mA ≤ I
LOAD
-40°C ≤ TJ ≤ +125°C
= 10 mA 175 400 mV
LOAD
≤ 20 mA
= 25°C only, and limits in boldface type apply
J
= 0A.
LOAD
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Unit
ppm / °C
30 ppm / V
25 120 ppm / mA
75
LM4128/LM4128Q
PP
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Electrical Characteristics
LM4128-2.5 (V
the junction temperature (TJ) range of -40°C to +125°C unless otherwise specified. Minimum and Maximum limits are guaranteed
through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are
provided for reference purposes only. Unless otherwise specified VIN = 5V and I
LM4128/LM4128Q
Symbol Parameter Conditions Min
V
REF
Output Voltage Initial Accuracy
LM4128A-2.5 (A Grade - 0.1%) -0.1 +0.1 %
LM4128B-2.5 (B Grade - 0.2%) -0.2 +0.2
LM4128C-2.5 (C Grade - 0.5%) -0.5 +0.5
LM4128D-2.5 (D Grade - 1.0%) -1.0 +1.0
TCV
/ °C (Note6)Temperature Coefficient LM4128A-2.5 75
REF
ΔV
ΔV
REF
REF
ΔV
I
I
Q_SD
Q
/ΔV
/ΔI
REF
Supply Current 60 100 µA
Supply Current in Shutdown EN = 0V 3 7 µA
Line Regulation
IN
Load Regulation
LOAD
Long Term Stability (Note 7) 1000 Hrs 50 ppm
Thermal Hysteresis (Note 8)
VIN - V
V
I
SC
V
V
REF
N
IL
IH
Dropout Voltage (Note 9) I
Output Noise Voltage 0.1 Hz to 10 Hz 275 µV
Short Circuit Current 75 mA
Enable Pin Maximum Low Input Level 35 %V
Enable Pin Minimum High Input Level 65 %V
= 2.5V) Limits in standard type are for T
OUT
LM4128B-2.5 75
LM4128C-2.5 100
LM4128D-2.5 100
V
+ 400 mV ≤ VIN ≤ 5.5V
REF
0 mA ≤ I
-40°C ≤ TJ ≤ +125°C
= 10 mA 175 400 mV
LOAD
LOAD
= 25°C only, and limits in boldface type apply over
J
= 0A.
LOAD
(Note 4)
Typ
(Note 5)
Max
(Note 4)
50 ppm / V
≤ 20 mA
25 120 ppm / mA
75
Unit
ppm / °C
PP
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