www.docs.chipfind.ru
LM4132
SOT-23 Precision Low Dropout Voltage Reference
General Description
The LM4132 family of precision voltage references performs
comparable to the best laser-trimmed bipolar references, but
in cost effective CMOS technology. The key to this break
through is the use of EEPROM registers for correction of
curvature, tempco, and accuracy on a CMOS bandgap ar-
chitecture that allows package level programming to over-
come assembly shift. The shifts in voltage accuracy and
tempco during assembly of die into plastic packages limit the
accuracy of references trimmed with laser techniques.
Unlike other LDO references, the LM4132 is capable of
delivering up to 20mA and does not require an output ca-
pacitor or buffer amplifier. These advantages and the SOT23
packaging are important for space-critical applications.
Series references provide lower power consumption than
shunt references, since they do not have to idle the maxi-
mum possible load current under no load conditions. This
advantage, the low quiescent current (60A), and the low
dropout voltage (400mV) make the LM4132 ideal for battery-
powered solutions.
The LM4132 is available in five grades (A, B, C, D and E) for
greater flexibility. The best grade devices (A) have an initial
accuracy of 0.05% with guaranteed temperature coefficient
of 10ppm/C or less, while the lowest grade parts (E) have
an initial accuracy of 0.5% and a tempco of 30ppm/C.
Features
n
Output initial voltage accuracy 0.05%
n
Low temperature coefficient 10ppm/C
n
Low Supply Current, 60A
n
Enable pin allowing a 3A shutdown mode
n
20mA output current
n
Voltage options 2.048V, 2.5V, 4.096V
n
Custom voltage options available (1.8V to 4.096V)
n
V
IN
range of V
REF
+ 400mV to 5.5V
@
10mA
n
Stable with low ESR ceramic capacitors
n
SOT23-5 Package
Applications
n
Instrumentation & Process Control
n
Test Equipment
n
Data Acquisition Systems
n
Base Stations
n
Servo Systems
n
Portable, Battery Powered Equipment
n
Automotive & Industrial
n
Precision Regulators
n
Battery Chargers
n
Communications
n
Medical Equipment
Typical Application Circuit
20151301
*Note: The capacitor C
IN
is required and the capacitor C
OUT
is optional.
September 2005
LM4132
SOT
-23
Precision
Low
Dropout
V
oltage
Reference
2005 National Semiconductor Corporation
DS201513
www.national.com
Connection Diagram
Top View
20151302
SOT23-5 Package
NS Package Number MA05B
Ordering Information
Input Output Voltage Accuracy at
25C And Temperature Coefficient
LM4132 Supplied as 1000
units, Tape and Reel
LM4132 Supplied as 3000 units,
Tape and Reel
Part Marking
0.05%, 10 ppm/C max (A grade)
LM4132AMF-2.0
LM4132AMFX-2.0
R4BA
LM4132AMF-2.5
LM4132AMFX-2.5
R4CA
LM4132AMF-4.1
LM4132AMFX-4.1
R4FA
0.1%, 20 ppm/C max (B grade)
LM4132BMF-2.0
LM4132BMFX-2.0
R4BB
LM4132BMF-2.5
LM4132BMFX-2.5
R4CB
LM4132BMF-4.1
LM4132BMFX-4.1
R4FB
0.2%, 20 ppm/C max (C grade)
LM4132CMF-2.0
LM4132CMFX-2.0
R4BC
LM4132CMF-2.5
LM4132CMFX-2.5
R4CC
LM4132CMF-4.1
LM4132CMFX-4.1
R4FC
0.4%, 20 ppm/C max (D grade)
LM4132DMF-2.0
LM4132DMFX-2.0
R4BD
LM4132DMF-2.5
LM4132DMFX-2.5
R4CD
LM4132DMF-4.1
LM4132DMFX-4.1
R4FD
0.5%, 30 ppm/C max (E grade)
LM4132EMF-2.0
LM4132EMFX-2.0
R4BE
LM4132EMF-2.5
LM4132EMFX-2.5
R4CE
LM4132EMF-4.1
LM4132EMFX-4.1
R4FE
Pin Descriptions
Pin #
Name
Function
1
N/C
No connect pin, leave floating
2
GND
Ground
3
EN
Enable pin
4
V
IN
Input supply
5
V
REF
Reference output
LM4132
www.national.com
2
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
Power Dissipation (T
A
= 25C)
(Note 2)
350mW
Storage Temperature Range
-65C to 150C
Lead Temperature
(soldering, 10sec)
260C
Vapor Phase (60 sec)
215C
Infrared (15sec)
220C
ESD Susceptibility (Note 3)
Human Body Model
2kV
Operating Ratings
Maximum Input Supply Voltage
5.5V
Maximum Enable Input Voltage
V
IN
Maximum Load Current
20mA
Junction Temperature Range (T
J
)
-40C to
+125C
Electrical Characteristics
LM4132-2.0 (V
OUT
= 2.048V)
Limits in standard type are for T
J
= 25C only, and limits in boldface type ap-
ply over the junction temperature (T
J
) range of -40C to +125C. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C, and are provided for
reference purposes only. Unless otherwise specified V
IN
= 5V and I
LOAD
= 0
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note
5)
Max
(Note 4)
Unit
V
REF
Output Voltage Initial Accuracy
LM4132A-2.0
(A Grade - 0.05%)
-0.05
0.05
%
LM4132B-2.0
(B Grade - 0.1%)
-0.1
0.1
LM4132C-2.0
(C Grade - 0.2%)
-0.2
0.2
LM4132D-2.0
(D Grade - 0.4%)
-0.4
0.4
LM4132E-2.0
(E Grade - 0.5%)
-0.5
0.5
TCV
REF
/ C
(Note 6)
Temperature Coefficient
LM4132A-2.0
0C
T
J
+ 85C
10
ppm / C
-40C
T
J
+125C
20
LM4132B-2.0
-40C
T
J
+125C
20
LM4132C-2.0
20
LM4132D-2.0
20
LM4132E-2.0
30
I
Q
Supply Current
60
100
A
I
Q_SD
Supply Current in Shutdown
EN = 0V
3
7
A
V
REF
/
V
IN
Line Regulation
V
REF
+ 400mV
V
IN
5.5V
30
ppm / V
V
REF
/
I
LOAD
Load Regulation
0mA
I
LOAD
20mA
25
120
ppm / mA
V
REF
Long Term Stability (Note 7)
1000 Hrs
50
ppm
Thermal Hysteresis (Note 8)
-40C
T
J
+125C
75
V
IN
- V
REF
Dropout Voltage (Note 9)
I
LOAD
= 10mA
175
400
mV
V
N
Output Noise Voltage
0.1 Hz to 10 Hz
190
V
PP
I
SC
Short Circuit Current
75
mA
V
IL
Enable Pin Maximum Low Input
Level
35
%V
IN
V
IH
Enable Pin Minimum High Input
Level
65
%V
IN
LM4132
www.national.com
3
Electrical Characteristics
LM4132-2.5 (V
OUT
= 2.5V)
Limits in standard type are for T
J
= 25C only, and limits in boldface type apply
over the junction temperature (T
J
) range of -40C to +125C. Minimum and Maximum limits are guaranteed through test, de-
sign, or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C, and are provided for ref-
erence purposes only. Unless otherwise specified V
IN
= 5V and I
LOAD
= 0
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note
5)
Max
(Note 4)
Unit
V
REF
Output Voltage Initial Accuracy
LM4132A-2.5
(A Grade - 0.05%)
-0.05
0.05
%
LM4132B-2.5
(B Grade - 0.1%)
-0.1
0.1
LM4132C-2.5
(C Grade - 0.2%)
-0.2
0.2
LM4132D-2.5
(D Grade - 0.4%)
-0.4
0.4
LM4132E-2.5
(E Grade - 0.5%)
-0.5
0.5
TCV
REF
/ C
(Note 6)
Temperature Coefficient
LM4132A-2.5
0C
T
J
+ 85C
10
ppm / C
-40C
T
J
+125C
20
LM4132B-2.5
-40C
T
J
+125C
20
LM4132C-2.5
20
LM4132D-2.5
20
LM4132E-2.5
30
I
Q
Supply Current
60
100
A
I
Q_SD
Supply Current in Shutdown
EN = 0V
3
7
A
V
REF
/
V
IN
Line Regulation
V
REF
+ 400mV
V
IN
5.5V
50
ppm / V
V
REF
/
I
LOAD
Load Regulation
0mA
I
LOAD
20mA
25
120
ppm / mA
V
REF
Long Term Stability (Note 7)
1000 Hrs
50
ppm
Thermal Hysteresis (Note 8)
-40C
T
J
+125C
75
V
IN
- V
REF
Dropout Voltage (Note 9)
I
LOAD
= 10mA
175
400
mV
V
N
Output Noise Voltage
0.1 Hz to 10 Hz
240
V
PP
I
SC
Short Circuit Current
75
mA
V
IL
Enable Pin Maximum Low Input
Level
35
%V
IN
V
IH
Enable Pin Minimum High Input
Level
65
%V
IN
LM4132
www.national.com
4
Electrical Characteristics
LM4132-4.1 (V
OUT
= 4.096V)
Limits in standard type are for T
J
= 25C only, and limits in boldface type ap-
ply over the junction temperature (T
J
) range of -40C to +125C. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C, and are provided for
reference purposes only. Unless otherwise specified V
IN
= 5V and I
LOAD
= 0
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note
5)
Max
(Note 4)
Unit
V
REF
Output Voltage Initial Accuracy
LM4132A-4.1
(A Grade - 0.05%)
-0.05
0.05
%
LM4132B-4.1
(B Grade - 0.1%)
-0.1
0.1
LM4132C-4.1
(C Grade - 0.2%)
-0.2
0.2
LM4132D-4.1
(D Grade - 0.4%)
-0.4
0.4
LM4132E-4.1
(E Grade - 0.5%)
-0.5
0.5
TCV
REF
/ C
(Note 6)
Temperature Coefficient
LM4132A-4.1
0C
T
J
+ 85C
10
ppm / C
-40C
T
J
+125C
20
LM4132B-4.1
-40C
T
J
+125C
20
LM4132C-4.1
20
LM4132D-4.1
20
LM4132E-4.1
30
I
Q
Supply Current
60
100
A
I
Q_SD
Supply Current in Shutdown
EN = 0V
3
7
A
V
REF
/
V
IN
Line Regulation
V
REF
+ 400mV
V
IN
5.5V
100
ppm / V
V
REF
/
I
LOAD
Load Regulation
0mA
I
LOAD
20mA
25
120
ppm / mA
V
REF
Long Term Stability (Note 7)
1000 Hrs
50
ppm
Thermal Hysteresis (Note 8)
-40C
T
J
+125C
75
V
IN
- V
REF
Dropout Voltage (Note 9)
I
LOAD
= 10mA
175
400
mV
V
N
Output Noise Voltage
0.1 Hz to 10 Hz
350
V
PP
I
SC
Short Circuit Current
75
mA
V
IL
Enable Pin Maximum Low Input
Level
35
%V
IN
V
IH
Enable Pin Minimum High Input
Level
65
%V
IN
Note 1: Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics.
Note 2: Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by T
JMAX
(maximum
junction temperature),
J-A
(junction to ambient thermal resistance) and T
A
(ambient temperature). The maximum power dissipation at any temperature is: P
DissMAX
= (T
JMAX
- T
A
) /
J-A
up to the value listed in the Absolute Maximum Ratings.
J-A
for SOT23-5 package is 220C/W, T
JMAX
= 125C.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin.
Note 4: Limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control.
Note 5: Typical numbers are at 25C and represent the most likely parametric norm.
Note 6: Temperature coefficient is measured by the "Box" method; i.e., the maximum
V
REF
is divided by the maximum
T.
Note 7: Long term stability is V
REF
@25C measured during 1000 hrs.
Note 8: Thermal hysteresis is defined as the change in +25C output voltage before and after cycling the device from (-40C to 125C).
Note 9: Dropout voltage is defined as the minimum input to output differential at which the output voltage drops by 0.5% below the value measured with a 5V input.
LM4132
www.national.com
5
Document Outline
PDF 
ZIP