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LM4125

www.ti.com

SNVS238A –MAY 2004–REVISED APRIL 2013

LM4125 Precision Micropower Low Dropout Voltage Reference

Check for Samples: LM4125

FEATURES

DESCRIPTION

The LM4125 is a precision low power low dropout

• Small SOT23-5 Package

bandgap voltage reference with up to 5 mA output

• Low Dropout Voltage: 120 mV Typ @ 1 mA

current source and sink capability.

• High Output Voltage Accuracy: 0.2%

This series reference operates with input voltages as

• Source and Sink Current Output: ±5 mA

low as 2V and up to 6V consuming 160 µA (Typ.)

• Supply Current: 160 μA Typ.

supply current. In power down mode, device current

drops to less than 2 μA.

• Low Temperature Coefficient: 50 ppm/°C

The LM4125 comes in two grades (A and Standard)

• Fixed Output Voltages: 2.048, 2.5,and 4.096

and three voltage options for greater flexibility. The

• Industrial Temperature Range: −40°C to +85°C

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 TI)

0.5%, both with a tempco of 50ppm/°C ensured from

−40°C to +125°C.

APPLICATIONS

The very low dropout voltage, low supply current and

• Portable, Battery Powered Equipment

power-down capability of the LM4125 makes this

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

• Precision Regulators

range (−40°C to +125°C). Please contact TI for full

specifications over the extended temperature range.

• Battery Chargers

The LM4125 is available in a standard 5-pin SOT-23

• Base Stations

package.

• Communications

• Medical Equipment

Connection Diagram

Figure 1. 5-Pin SOT-23 Surface Mount Package

See Package Number DBV

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

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.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (18 pages)

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LM4125 www.ti.com SNVS238A – MAY 2004 – REVISED APRIL 2013 LM4125 Precision Micropower Low Dropout Voltage Reference Check for Samples: LM4125 FEATURES DESCRIPTION • • • • • • • • • The LM4125 is a precision low power low dropout bandgap voltage reference with up to 5 mA output current source and sink capability. 1 2 Small SOT23-5 Package Low Dropout Voltage: 120 mV Typ @ 1 mA High Output Voltage Accuracy: 0.2% Source and Sink Current Output: ±5 mA Supply Current: 160 μA Typ.
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LM4125 SNVS238A – MAY 2004 – REVISED APRIL 2013 www.ti.com Absolute Maximum Ratings (1) (2) −0.3V to 8V Maximum Voltage on input or enable pins Output Short-Circuit Duration Power Dissipation (TA = 25°C) (3) ESD Susceptibility (4) Indefinite DBV package − θJA 280°C/W Power Dissipation 350 mW Human Body Model Machine Model Lead Temperature: (1) (2) (3) (4) 2 kV 200V Soldering, (10 sec.) +260°C Vapor Phase (60 sec.) +215°C Infrared (15 sec.
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LM4125 www.ti.com SNVS238A – MAY 2004 – REVISED APRIL 2013 Electrical Characteristics — LM4125-2.048V and 2.5V Unless otherwise specified VIN = 3.3V, ILOAD = 0, COUT = 0.01µF, TA = Tj = 25°C. Limits with standard typeface are for Tj = 25°C, and limits in boldface type apply over the −40°C ≤ TA ≤ +85°C temperature range. Symbol VOUT Parameter Conditions Output Voltage Initial Accuracy LM4125A-2.048 LM4125A-2.500 ±0.2 % LM4125-2.048 LM4125-2.500 ±0.
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LM4125 SNVS238A – MAY 2004 – REVISED APRIL 2013 www.ti.com Electrical Characteristics — LM4125-4.096V Unless otherwise specified VIN = 5V, ILOAD = 0, COUT = 0.01µF, TA = Tj = 25°C. Limits with standard typeface are for Tj = 25°C, and limits in boldface type apply over the −40°C ≤ TA ≤ +85°C temperature range. Symbol VOUT Parameter Conditions Output Voltage Initial Accuracy LM4125A-4.096 ±0.2 % LM4125-4.096 ±0.
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LM4125 www.ti.com SNVS238A – MAY 2004 – REVISED APRIL 2013 LM4125 Typical Operating Characteristics Unless otherwise specified, VIN = 3.3V, VOUT = 2.5V, ILOAD = 0, COUT = 0.022µF and TA = 25°C. Long Term Drift Typical Temperature Drift Figure 2. Figure 3. Short Circuit Current vs Temperature Dropout Voltage vs Output Error Figure 4. Figure 5. Dropout Voltage vs Load Current Load Regulation Figure 6. Figure 7.
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LM4125 SNVS238A – MAY 2004 – REVISED APRIL 2013 www.ti.com LM4125 Typical Operating Characteristics (continued) Unless otherwise specified, VIN = 3.3V, VOUT = 2.5V, ILOAD = 0, COUT = 0.022µF and TA = 25°C. 6 GND Pin Current GND Pin Current at No Load vs Temperature Figure 8. Figure 9. GND Pin Current vs Load 0.1Hz to 10Hz output Noise Figure 10. Figure 11. Output Impedance vs Frequency PSRR vs Frequency Figure 12. Figure 13.
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LM4125 www.ti.com SNVS238A – MAY 2004 – REVISED APRIL 2013 LM4125 Typical Operating Characteristics (continued) Unless otherwise specified, VIN = 3.3V, VOUT = 2.5V, ILOAD = 0, COUT = 0.022µF and TA = 25°C. Start-Up Response Load Step Response Figure 14. Figure 15. Load Step Response Line Step Response Figure 16. Figure 17. Thermal Hysteresis Figure 18.
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LM4125 SNVS238A – MAY 2004 – REVISED APRIL 2013 www.ti.com PIN FUNCTIONS Output (Pin 5): Reference Output. Input (Pin 4): Positive Supply. Ground (Pin 2): Negative Supply or Ground Connection. APPLICATION HINTS The standard application circuit for the LM4125 is shown in Figure 19. It is designed to be stable with ceramic output capacitors in the range of 0.022µF to 0.1µF. Note that 0.022µF is the minimum required output capacitor. These capacitors typically have an ESR of about 0.1 to 0.5Ω.
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LM4125 www.ti.com SNVS238A – MAY 2004 – REVISED APRIL 2013 Typical Application Circuits Figure 20. Voltage Reference with Negative Output Figure 21. Precision High Current Low Dropout Regulator Figure 22. Precision High Current Negative Voltage Regulator Figure 23. Voltage Reference with Complimentary Output Figure 24. Precision High Current Low Droput Regulator Figure 25.
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LM4125 SNVS238A – MAY 2004 – REVISED APRIL 2013 www.ti.com Figure 26. Programmable Current Source Figure 27. Precision Regulator with Current Limiting Circuit Figure 28.
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LM4125 www.ti.com SNVS238A – MAY 2004 – REVISED APRIL 2013 REVISION HISTORY Changes from Original (April 2013) to Revision A • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM4125AIM5-2.5/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 R81A LM4125IM5-2.0/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 R80B LM4125IM5-2.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LM4125AIM5-2.5/NOPB SOT-23 DBV 5 1000 178.0 8.4 LM4125IM5-2.0/NOPB SOT-23 DBV 5 1000 178.0 LM4125IM5-2.5 SOT-23 DBV 5 1000 178.0 LM4125IM5-2.5/NOPB SOT-23 DBV 5 1000 178.0 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM4125AIM5-2.5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM4125IM5-2.0/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM4125IM5-2.5 SOT-23 DBV 5 1000 210.0 185.0 35.0 LM4125IM5-2.5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.
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