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LM4121
www.ti.com
SNVS073C –APRIL 2000–REVISED APRIL 2013
LM4121 Precision Micropower Low Dropout Voltage Reference
Check for Samples: LM4121
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FEATURES (LM4121-1.2)
DESCRIPTION
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• Small SOT23-5 Package
The LM4121 is a precision bandgap voltage
• Low Voltage Operation
reference available in a fixed 1.25V and adjustable
• High Output Voltage Accuracy: 0.2%
version with up to 5 mA current source and sink
capability.
• Source and Sink Current Output: ±5 mA
• Supply current: 160 μA Typ.
This series reference operates with input voltages as
low as 1.8V and up to 12V consuming 160 µA (Typ.)
• Low Temperature Coefficient: 50 ppm/°C
supply current. In power down mode, device current
• Enable Pin
drops to less than 2 μA.
• Output Voltages: 1.25V and Adjustable
The LM4121 comes in two grades A and Standard.
• Industrial Temperature Range: −40°C to +85°C
The best grade devices (A) have an initial accuracy of
• (For Extended Temperature Range, −40°C to
0.2%, while the standard have an initial accuracy of
125°C, Contact Texas Instruments)
0.5%, both with a tempco of 50ppm/°C ensured from
−40°C to +125°C.
APPLICATIONS
The very low operating voltage, low supply current
and power-down capability of the LM4121 makes this
• Portable, Battery Powered Equipment
product an ideal choice for battery powered and
• Instrumentation and Process Control
portable applications.
• Automotive & Industrial
The device performance is ensured over the industrial
• Test Equipment
temperature range (−40°C to +85°C), while certain
• Data Acquisition Systems
specs are ensured over the extended temperature
range (−40°C to +125°C). Please contact Texas
• Precision Regulators
Instruments for full specifications over the extended
• Battery Chargers
temperature range. The LM4121 is available in a
• Base Stations
standard 5-pin SOT-23 package.
• Communications
• Medical Equipment
Block Diagram
* Resistors are removed on the LM4121-ADJ
†LM4121-ADJ only
Figure 1. LM4121-1.2 Block Diagram
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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