Datasheet

ManualsBrandsMicrochip ManualsIntegrated Circuits (ICs)Shunt Voltage Reference SOT-23 1.24 ... 10V

 2017-2018 Microchip Technology Inc. DS20005757B-page 1

LM4040/LM4041

Features

• Small SOT-23 Package

• No Output Capacitor Required

• Tolerates Capacitive Loads

• Fixed Reverse-Breakdown Voltages of 1.225V,

2.500V, 4.096V, and 5.000V

• Adjustable Reverse-Breakdown Version

Applications

• Battery-Powered Equipment

• Data Acquisition Systems

• Instrumentation

• Process Control

• Energy Management

• Product Testing

• Automotive Electronics

• Precision Audio Components

General Description

Ideal for space critical applications, the LM4040 and

LM4041 precision voltage references are available in

the subminiature SOT-23 surface-mount package.

The LM4040 is available in fixed reverse-breakdown

voltages of 2.500V, 4.096V, and 5.000V. The LM4041

is available with a fixed 1.225V or an adjustable

reverse-breakdown voltage.

The minimum operating current ranges from 60 A for

the LM4041-1.2 to 74 A for the LM4040-5.0. LM4040

versions have a maximum operating current of 15 mA.

LM4041 versions have a maximum operating current of

12 mA.

The LM4040 and LM4041 have bandgap reference

temperature drift curvature correction and low dynamic

impedance, ensuring stable reverse-breakdown

voltage accuracy over a wide range of operating

temperatures and currents.

Package Types

LM4040/LM4041 (FIXED VERSION)

3-Pin SOT-23

LM4041 (ADJUSTABLE VERSION)

3-Pin SOT-23

Precision Micropower Shunt Voltage Reference

Summary of content (30 pages)

PAGE 1
LM4040/LM4041 Precision Micropower Shunt Voltage Reference Features General Description • • • • Small SOT-23 Package No Output Capacitor Required Tolerates Capacitive Loads Fixed Reverse-Breakdown Voltages of 1.225V, 2.500V, 4.096V, and 5.000V • Adjustable Reverse-Breakdown Version Ideal for space critical applications, the LM4040 and LM4041 precision voltage references are available in the subminiature SOT-23 surface-mount package.
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LM4040/LM4041 Typical Application Diagrams LM4041 Adjustable Shunt Regulator Application VS LM4040/LM4041 Fixed Shunt Regulator Application VS RS VR LM4040 I Q + IL IL RS VO VO R1 LM4041 Adjustable IQ VO = 1.233 (R2/R1 + 1) R2 Functional Block Diagrams LM4040/LM4041 Fixed LM4041 Adjustable + + VREF FB DS20005757B-page 2  2017-2018 Microchip Technology Inc.
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LM4040/LM4041 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Reverse Current......................................................................................................................................................20 mA Forward Current ......................................................................................................................................................10 mA Maximum Output Voltage (LM4041-ADJ) ...........................................................
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LM4040/LM4041 LM4040-2.5 ELECTRICAL CHARACTERISTICS (Note 1) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Sym. Min. Typ. Max. Units Conditions VR — 2.500 — V IR = 100 µA, TA = +25°C — — ±12 mV IR = 100 µA, TA = +25°C — — ±29 mV IR = 100 µA — 45 60 µA TA = +25°C — — 65 — ±20 — — ±15 ±100 — ±15 — — 0.3 0.8 — — 1.0 IRMIN ≤ IR ≤ 1 mA — 2.5 6.
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LM4040/LM4041 LM4040-2.5 ELECTRICAL CHARACTERISTICS (Note 1) (CONTINUED) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Reverse-Breakdown Voltage Change with Operating Current Change Sym. Min. Typ. Max. Units ∆VR/∆IR — 0.3 1.0 mV — — 1.2 IRMIN ≤ IR ≤ 1 mA — 2.5 8.0 1 mA ≤ IR ≤ 15 mA, TA = +25°C — — 10.0 1 mA ≤ IR ≤ 15 mA Reverse Dynamic Impedance ZR — 0.3 1.
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LM4040/LM4041 LM4040-4.1 ELECTRICAL CHARACTERISTICS (Note 1) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Sym. Min. Typ. Max. Units Conditions VR — 4.096 — V IR = 100 µA, TA = +25°C — — ±20 mV IR = 100 µA, TA = +25°C — — ±47 mV IR = 100 µA — 50 68 µA TA = +25°C — — 73 — ±30 — — ±20 ±100 — ±20 — — 0.5 0.9 — — 1.2 IRMIN ≤ IR ≤ 1 mA — 3.0 7.
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LM4040/LM4041 LM4040-4.1 ELECTRICAL CHARACTERISTICS (Note 1) (CONTINUED) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Reverse-Breakdown Voltage Change with Operating Current Change Sym. Min. Typ. Max. Units ∆VR/∆IR — 0.5 1.2 mV — — 1.5 IRMIN ≤ IR ≤ 1 mA — 3.0 9.0 1 mA ≤ IR ≤ 15 mA, TA = +25°C — — 13.0 1 mA ≤ IR ≤ 15 mA Reverse Dynamic Impedance ZR — 0.5 1.
PAGE 8
LM4040/LM4041 LM4040-5.0 ELECTRICAL CHARACTERISTICS (Note 1) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Sym. Min. Typ. Max. Units Conditions VR — 5.000 — V IR = 100 µA, TA = +25°C — — ±25 mV IR = 100 µA, TA = +25°C — — ±58 mV IR = 100 µA — 54 74 µA TA = +25°C — — 80 — ±30 — — ±20 ±100 — ±20 — — 0.5 1.0 — — 1.4 IRMIN ≤ IR ≤ 1 mA — 3.5 8.
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LM4040/LM4041 LM4040-5.0 ELECTRICAL CHARACTERISTICS (Note 1) (CONTINUED) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Reverse-Breakdown Voltage Change with Operating Current Change Sym. Min. Typ. Max. Units ∆VR/∆IR — 0.5 1.3 mV — — 1.8 IRMIN ≤ IR ≤ 1 mA — 3.5 10.0 1 mA ≤ IR ≤ 15 mA, TA = +25°C — — 15.0 1 mA ≤ IR ≤ 15 mA Reverse Dynamic Impedance ZR — 0.5 1.
PAGE 10
LM4040/LM4041 LM4041-1.2 ELECTRICAL CHARACTERISTICS (Note 1) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Sym. Min. Typ. Max. Units Conditions VR — 1.225 — V IR = 100 µA, TA = +25°C — — ±6 mV IR = 100 µA, TA = +25°C — — ±14 mV IR = 100 µA — 45 60 µA TA = +25°C — — 65 — ±20 — — ±15 ±100 — ±15 — — 0.7 1.5 — — 2.0 IRMIN ≤ IR ≤ 1 mA — 4.0 6.
PAGE 11
LM4040/LM4041 LM4041-1.2 ELECTRICAL CHARACTERISTICS (Note 1) (CONTINUED) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Reverse-Breakdown Voltage Change with Operating Current Change Sym. Min. Typ. Max. Units ∆VR/∆IR — 0.7 2.0 mV — — 2.5 IRMIN ≤ IR ≤ 1 mA — 2.5 8.0 1 mA ≤ IR ≤ 12 mA, TA = +25°C — — 10.0 1 mA ≤ IR ≤ 12 mA Reverse Dynamic Impedance ZR — 0.5 2.
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LM4040/LM4041 LM4041-ADJ ELECTRICAL CHARACTERISTICS (Note 1) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Sym. Min. Typ. Max. Units Conditions VR — 1.233 — V IR = 100 µA, VOUT = 5V — — ±6.2 mV IR = 100 µA, TA = +25°C — — ±14 mV IR = 100 µA — 45 60 µA TA = +25°C — — 65 — 0.7 1.5 — — 2.0 IRMIN ≤ IR ≤ 1 mA, VOUT ≥ 1.6V (Note 3) — 2.0 4.0 1 mA ≤ IR ≤ 12 mA, VOUT ≥ 1.6V (Note 3), TA = +25°C — — 6.0 1 mA ≤ IR ≤ 12 mA, VOUT ≥ 1.
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LM4040/LM4041 LM4041-ADJ ELECTRICAL CHARACTERISTICS (Note 1) (CONTINUED) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Reverse-Breakdown Voltage Long-Term Stability Sym. Min. Typ. Max. Units Conditions ∆VR — 120 — ppm VR — 1.233 — V IR = 100 µA, VOUT = 5V — — ±12 mV IR = 100 µA, TA = +25°C — — ±24 mV IR = 100 µA — 45 65 µA TA = +25°C — — 70 — 0.7 2.0 — — 2.5 IRMIN ≤ IR ≤ 1 mA, VOUT ≥ 1.6V (Note 3) — 2.0 6.
PAGE 14
LM4040/LM4041 LM4041-ADJ ELECTRICAL CHARACTERISTICS (Note 1) (CONTINUED) TA = Operating Temperature Range, TA = TJ = –40°C to +85°C, unless noted. Parameters Wideband Noise Reverse-Breakdown Voltage Long-Term Stability Note 1: 2: 3: Sym. Min. Typ. Max. eN — 20 — ∆VR — 120 — Units Conditions µVRMS IR = 100 µA, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz ppm t = 1000 hrs., TA = +25°C ±0.1°C, IR = 100 µA Specification for packaged product only.
PAGE 15
LM4040/LM4041 TEMPERATURE SPECIFICATIONS (Note 1) Parameters Sym. Min. Typ. Max.
PAGE 16
LM4040/LM4041 2.0 Note: TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. LM4040 Noise Voltage vs. FIGURE 2-1: vs.
PAGE 17
LM4040/LM4041 FIGURE 2-7: Frequency. LM4041 Noise Voltage vs. FIGURE 2-8: LM4041 Output Saturation. FIGURE 2-9: vs. Frequency. LM4041 Output Impedance  2017-2018 Microchip Technology Inc. FIGURE 2-10: Response.
PAGE 18
LM4040/LM4041 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin Number Fixed Pin Number Adjustable Pin Name 1 2 + — 1 FB 2 3 – 3 — NC DS20005757B-page 18 Description Cathode. Connect to positive voltage. Feedback. Connect to a resistive divider network to set the output voltage. Anode. Connect to negative voltage. Not internally connected. This pin must be left floating or connected to –.  2017-2018 Microchip Technology Inc.
PAGE 19
LM4040/LM4041 4.0 APPLICATION INFORMATION The stable operation of the LM4040 and LM4041 references require an external capacitor greater than 10 nF connected between the (+) and (–) pins. Bypass capacitors with values between 100 pF and 10 nF have been found to cause the devices to exhibit instabilities. The actual value of the internal VREF is a function of VO. The corrected VREF is determined by: EQUATION 4-3: V REF V REF = V O   ---------------- + V Y  V O  Where: 4.
PAGE 20
LM4040/LM4041 5.0 TYPICAL APPLICATION CIRCUITS VIN R1 + FB 120k LM4041-ADJ – D1 I R2 1M λ < –12V R3 LED ON 200 + LM4041-ADJ FB – D1 1N457 R1 VOUT R2 D2 510k – 1N457 FB LM4041-ADJ + R3 510k –5V Voltage Level Detector. FIGURE 5-1: Bidirectional Clamp ±2.4V.
PAGE 21
LM4040/LM4041 0 to 20mA + 5V R1 390Ω ± 2% 1N4002 D2 + LM4041-ADJ FB D1* λ N.C. I THRESHOLD = R2 470k – 1 6 2 5 3 N.C. CMOS 4 4N28 5A 1.24V + = 3.2mA R1 4N28 GAIN * D1 can be any LED, VF = 1.5V to 2.2V at 3mA. D1 may act as an indicator. D1 will be on if ITHRESHOLD falls below the threshold current, except with I = O. FIGURE 5-7: Floating Current Detector. +15V + LM4041-ADJ R1 FB – 2N2905 2N 3964 R2 120k 1A < IOUT = 100mA 1.24V I OUT = R1 FIGURE 5-8: Current Source.
PAGE 22
LM4040/LM4041 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 3-Pin SOT-23* Top Side Bottom Side XXX NNN Example Top Side Bottom Side Y2D J9M Device Top Side Marking LM4040CYM3-2.5-TR Y2C LM4040CYM3-4.1-TR Y4C LM4040CYM3-5.0-TR Y5C LM4040DYM3-2.5-TR Y2D LM4040DYM3-4.1-TR Y4D LM4040DYM3-5.0-TR Y5D LM4041CYM3-ADJ-TR YAC LM4041CYM3-1.2-TR Y1C LM4041DYM3-ADJ-TR YAD LM4041DYM3-1.2-TR Y1D Legend: XX...
PAGE 23
LM4040/LM4041 3-Lead SOT-23 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.  2017-2018 Microchip Technology Inc.
PAGE 24
LM4040/LM4041 NOTES: DS20005757B-page 24  2017-2018 Microchip Technology Inc.
PAGE 25
LM4040/LM4041 APPENDIX A: REVISION HISTORY Revision A (April 2017) • Converted Micrel data sheet LM4040/LM4041 to Microchip DS20005757A. • Minor text changes throughout. • Updated temperature information in all Electrical Characteristics tables to better reflect which values are valid for TA = +25°C. Revision B (July 2018) • Corrected part number for Reverse Current in Operating Ratings ‡ to LM4041-ADJ. • Updated Section 6.1 “Package Marking Information” drawing and information.
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LM4040/LM4041 NOTES: DS20005757B-page 26  2017-2018 Microchip Technology Inc.
PAGE 27
LM4040/LM4041 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. PART NO. Device X X XX Accuracy, Temperature Package Temperature Range Coefficient Device: LM4040: -X.X -XX Voltage Media Type Precision Micropower Shunt Voltage Reference Precision Micropower Shunt Voltage Reference LM4041: Examples: a) LM4040CYM3-2.5-TR: LM4040, ±0.5%, 100 ppm/°C, –40°C to +85°C Temp. Range, 3-Lead SOT-23, 2.
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LM4040/LM4041 NOTES: DS20005757B-page 28  2017-2018 Microchip Technology Inc.
PAGE 29
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
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