October 23, 2008
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 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)
■
V
IN
range of V
REF
+ 400 mV to 5.5V @10 mA
■
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
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
20211001
*Note: The capacitor C
IN
is required and the capacitor C
OUT
is optional.
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LM4128/LM4128Q SOT-23 Precision Micropower Series Voltage Reference
