LM4130
Precision Micropower Low Dropout Voltage Reference
LM4130 Precision Micropower Low Dropout Voltage Reference
General Description
The LM4130 family of precision voltage references performs
comparable to thebestlaser-trimmed bipolar references, but
in cost effective CMOS technology. Key to this break through
is the use of EEPROM registers for correction of curvature,
tempco, and accuracy on a CMOS bandgap architecture that
allows package level programming to overcome 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 LM4130 requires no output
capacitor. Neither is a buffer amplifier required, even with
loads up to 20mA. These advantages and the SOT23 packaging are important for cost-critical and space-critical applications.
Series references provide lower power consumption than
shunt references, since they don’t have to idle the maximum
possible load current under no load conditions. This advantage, the low quiescent current (75µA), and the low dropout
voltage(275mV) make the LM4130 ideal for battery-powered
solutions.
The LM4130 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 Small SOT23-5 package
n High output voltage accuracy0.05
n Low Temperature Coefficient10 ppm/˚C
n Stable with capacitive loads to 100µF
n Low dropout voltage≤275 mV
n Supply Current≤75 µA
n Full accuracy−40˚C to 85˚C
n Extended operation to 125˚C
n Excellent load and line regulation
n Output current20 mA
n Output impedance
n Voltage options:2.048V, 2.500V, and 4.096V
Applications Summary
n Portable, battery powered equipment
n Instrumentation and process control
n Automotive & Industrial
n Test equipment
n Data acquisition systems
n Precision regulators
n Battery chargers
n Base stations
n Communications
n Medical equipment
n Servo systems
Connection Diagram and Pin Configuration
@
10 mA
<
1Ω
%
*
Optional, Recommended for improved transient response and
input noise reduction.
(See Application Information)
Only four fields of marking are possible on the SOT23-5’s small surface. This
table gives the meaning of the four fields.
Field Information
First Field:
R=Reference
Second and Third Field:
02=2.048V Voltage Option
03=2.50V Voltage Option
04=4.096V Voltage Option
Fourth Field:
A-E=Initial Reference Voltage Tolerance and Temperature Coefficient
=
±
A
0.05%, 10ppm/˚C
=
±
B
0.2%, 10ppm/˚C
=
±
C
0.1%, 20ppm/˚C
=
±
D
0.4%, 20ppm/˚C
=
±
E
0.5%, 30ppm/˚C
LM4130 Supplied as
3000 Units, Tape and
Reel
Part Marking
www.national.com2
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−0.3V to 6V
Output Short-Circuit DurationIndefinite
Power Dissipation (T
=
25˚C)350 mW
A
(Note 2)
ESD Susceptibility (Note 3)
Human Body Model2 kV
Machine Model200V
LM4130-2.048
Electrical Characteristics
Unless otherwise specified V
face type apply over the operating temperature range.
=
5V, I
CC
SymbolParameterConditions
V
REF
Output Voltage Initial
Accuracy
LM4130A-2.048
LM4130B-2.048
LM4130C-2.048
LM4130D-2.048
LM4130E-2.048
TCV
REF
(Note 6)
/˚C
Temperature Coefficientppm/˚C
LM4130A, B0˚C ≤ T
LM4130C, D20
LM4130E30
∆V
∆V
REF
REF
/∆V
/∆I
IN
LOAD
Line RegulationI
Load Regulation0 mA ≤ I
Long-Term Stability
∆V
REF
(Note 7)
Thermal Hysteresis
(Note 8)
V
IN-VREF
V
N
I
S
I
SC
Dropout Voltage
(Note 9)
Output Noise Voltage0.1 Hz to 10 Hz125µV
Supply Current5075