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What is LM4128?

This electronic component, produced by the manufacturer "National Semiconductor", performs the same function as "SOT-23 Precision Micropower Series Voltage Reference".


LM4128 Datasheet PDF - National Semiconductor

Part Number LM4128
Description SOT-23 Precision Micropower Series Voltage Reference
Manufacturers National Semiconductor 
Logo National Semiconductor Logo 


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November 2006
LM4128
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 sta-
bility 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 advan-
tage, 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 VREF + 400 mV to 5.5V @10 mA
Stable with low ESR ceramic capacitors
SOT23-5 Package
−40°C to 125°C junction temperature range
Applications
Instrumentation & Process Control
Test Equipment
Data Acquisition Systems
Base Stations
Servo Systems
Portable, Battery Powered Equipment
Automotive & Industrial
Precision Regulators
Battery Chargers
Communications
Medical Equipment
Typical Application Circuit
*Note: The capacitor CIN is required and the capacitor COUT is optional.
© 2006 National Semiconductor Corporation 202110
20211001
www.national.com

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LM4128 equivalent
Electrical Characteristics LM4128-2.5 (VOUT = 2.5V) Limits in standard type are for TJ = 25°C
only, and limits in boldface type apply 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
ILOAD = 0A.
Symbol
Parameter
Conditions
Min Typ Max
(Note 4) (Note 5) (Note 4)
Unit
VREF
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
TCVREF / °C (Note Temperature Coefficient
6)
LM4128A-2.5
LM4128B-2.5
LM4128C-2.5
75
75
ppm / °C
100
LM4128D-2.5
100
IQ Supply Current
60 100
IQ_SD
Supply Current in Shutdown
EN = 0V
37
ΔVREFVIN Line Regulation
VREF + 400 mV VIN 5.5V
50
ΔVREFILOAD Load Regulation
0 mA ILOAD 20 mA
25 120
ΔVREF
Long Term Stability (Note 7)
Thermal Hysteresis (Note 8)
1000 Hrs
-40°C TJ +125°C
50
75
VIN - VREF
Dropout Voltage (Note 9)
ILOAD = 10 mA
175 400
VN Output Noise Voltage
0.1 Hz to 10 Hz
275
ISC Short Circuit Current
75
VIL Enable Pin Maximum Low Input Level
35
VIH Enable Pin Minimum High Input Level
65
µA
µA
ppm / V
ppm / mA
ppm
mV
µVPP
mA
%V
%V
5 www.national.com


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