LM4132 Datasheet, PDF (1/38 Pages) National Semiconductor (TI) – SOT-23 Precision Low Dropout Voltage Reference

LM4132
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SNVS372C – AUGUST 2005 – REVISED APRIL 2013
LM4132 SOT-23 Precision Low Dropout Voltage Reference
Check for Samples: LM4132
FEATURES
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•2 Output Initial Voltage Accuracy 0.05%
• Low Temperature Coefficient 10ppm/°C
• Low Supply Current, 60µA
• Enable Pin Allowing a 3µA Shutdown Mode
• 20mA 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 + 400mV to 5.5V @ 10mA
• Stable with Low ESR Ceramic Capacitors
• SOT23-5 Package
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
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
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 LM4132 is capable
of delivering up to 20mA and does not require an
output capacitor 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 maximum possible load current under no load
conditions. This advantage, the low quiescent current
(60µA), 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 a specified
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.
Typical Application Circuit
Input
5V
V_IN
C_IN^*
V_REF
LM4132
C_OU^*_T
Output
2.5V
Enable
EN
GND
*Note: The capacitor C_IN is required and the capacitor C_OUT is optional.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2013, Texas Instruments Incorporated