MICREL LM4041DIM3-ADJ, LM4041CIM3-ADJ, LM4041CIM3-1.2, LM4040CIM3-5.0, LM4040CIM3-2.5 Datasheet

LM4040/4041 Micrel

LM4040/4041

Precision Micropower Shunt Voltage Reference

General Description

Ideal for space critical applications, the LM4040 and LM4041
precision voltage references are available in the subminia­ture (3mm × 1.3mm) SOT-23 surface-mount package.

The LM4040 is the 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 LM4040 and LM4041’s advanced design eliminates the
need for an external stabilizing capacitor while ensuring
stability with any capacitive load, making them easy to use.

The minimum operating current ranges from 60µA for the
LM4041-1.2 to 74µA for the LM4040-5.0. LM4040 versions
have a maximum operating current of 15mA. LM4041
versions have a maximum operating current of 12mA.

The LM4040 and LM4041 utilizes zener-zap reverse break­down voltage trim during wafer sort to ensure that the prime
parts have an accuracy of better than ±0.1% (A grade) at
25°C. Bandgap reference temperature drift curvature correc­tion and low dynamic impedance ensure stable reverse
breakdown voltage accuracy over a wide range of operating
temperatures and currents.

Features

• Small SOT-23 package

• No output capacitor required

• Tolerates capacitive loads

• Fixed reverse breakdown voltages of 1.225, 2.500V,

4.096V and 5.000V

• Adjustable reverse breakdown version

• Contact Micrel for parts with extended temperature
range.

Key Specifications

• Output voltage tolerance (A grade, 25°C) .. ±0.1% (max)

• Low output noise (10Hz to 100Hz)

LM4040 ................................................35µV

LM4041 ................................................20µV

RMS
RMS

(typ)
(typ)

• Wide operating current range

LM4040 ................................................ 60µA to 15mA

LM4041 ................................................ 60µA to 12mA

• Industrial temperature range ..................–40°C to +85°C

• Low temperature coefficient ................100ppm/°C (max)

Applications

• Battery-Powered Equipment

• Data Acquisition Systems

• Instrumentation

• Process Control

• Energy Management

• Product Testing

• Automotive Electronics

• Precision Audio Components

Typical Applications

V

S

V

S

IQ + I

R

S

V

R

LM4040
LM4041

Figure 1. LM4040, LM4041 Fixed

Shunt Regulator Application

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com

L

I

L

V

O

I

Q

Adjustable

Figure 2. LM4041 Adjustable

Shunt Regulator Application

January 2000 1 LM4040/4041

LM4041

R

S

V

R

V

O

R

1

VO = 1.233 (R2/R1 + 1)

R

2

LM4040/4041 Micrel

Pin Configuration

1

+

3

–

2

Pin 3 must float or

be connected to pin 2.

Fixed Version

SOT-23 (M3) Package

Top View

Ordering Information

Part Number * Voltage Accuracy,

Temp. Coefficient

LM4040AIM3-2.5 2.500V ±0.1%, 100ppm/°C
LM4040BIM3-2.5 2.500V ±0.2%, 100ppm/°C
LM4040CIM3-2.5 2.500V ±0.5%, 100ppm/°C
LM4040DIM3-2.5 2.500V ±1.0%, 150ppm/°C
LM4040AIM3-4.1 4.096V ±0.1%, 100ppm/°C
LM4040BIM3-4.1 4.096V ±0.2%, 100ppm/°C
LM4040CIM3-4.1 4.096V ±0.5%, 100ppm/°C
LM4040DIM3-4.1 4.096V ±1.0%, 150ppm/°C
LM4040AIM3-5.0 5.000V ±0.1%, 100ppm/°C
LM4040BIM3-5.0 5.000V ±0.2%, 100ppm/°C
LM4040CIM3-5.0 5.000V ±0.5%, 100ppm/°C
LM4040DIM3-5.0 5.000V ±1.0%, 150ppm/°C

1

FB

3 –

+

2

Adjustable Version

SOT-23 (M3) Package

Top View

Part Number * Voltage Accuracy,

Temp. Coefficient

LM4041AIM3-1.2 1.225V ±0.1%, 100ppm/°C
LM4041BIM3-1.2 1.225V ±0.2%, 100ppm/°C
LM4041CIM3-1.2 1.225V ±0.5%, 100ppm/°C
LM4041DIM3-1.2 1.225V ±1.0%, 150ppm/°C
LM4041CIM3-ADJ 1.24V to 10V ±0.5%, 100ppm/°C
LM4041DIM3-ADJ 1.24V to 10V ±1.0%, 150ppm/°C

SOT-23 Package Markings

Example Field Code

R _ _ 1st Character R = Reference

Example: R2C represents

±

0.5%

(LM4040CIM3-2.5)

Reference, 2.500V,

LM4040/4041 2 January 2000

Example Field Code

_ 2 _ 2nd Character 1 = 1.225V

2 = 2.500V
4 = 4.096V
5 = 5.000V
A = Adjustable

Example Field Code

_ _ A 3rd Character A = ±0.1%

B = ±0.2%
C = ±0.5%
D = ±1.0%

Note: If 3rd character is omitted, container will
indicate tolerance.

LM4040/4041 Micrel

Functional Diagram
LM4040, LM4041 Fixed

Functional Diagram
LM4041 Adjustable

+

V

REF

FB

+

Absolute Maximum Ratings

Reverse Current.........................................................20mA

Forward Current .........................................................10mA

Maximum Output Voltage

LM4041-Adjustable ...................................................15V

Power Dissipation at TA = 25°C (Note 2) ................306mW

Storage Temperature ............................... –65°C to +150°C

Lead Temperature

Vapor phase (60 seconds) .............................. +215°C

Infrared (15 seconds) ...................................... +220°C

ESD Susceptibility

Human Body Model (Note 3).................................2kV

Machine Model (Note 3) ......................................200V

Operating Ratings (Notes 1 and 2)

Temperature Range

(T

≤ TA ≤ T

MIN

Reverse Current

LM4040-2.5 .......................................... 60µA to 15mA

LM4040-4.1 .......................................... 68µA to 15mA

LM4040-5.0 .......................................... 74µA to 15mA

LM4041-1.2 .......................................... 60µA to 12mA

LM4041-ADJ ........................................ 60µA to 12mA

Output Voltage Range

LM4041-ADJ .......................................... 1.24V to 10V

).......................... –40°C ≤ TA ≤ +85°C

MAX

January 2000 3 LM4040/4041

LM4040/4041 Micrel

LM4040-2.5 Electrical Characteristics

Boldface limits apply for TA = TJ = T

Breakdown Voltage tolerance of ±0.1%, ±0.2%, ±0.5%, and ±1.0 respectively.

Symbol Parameter Conditions Typical Units

V

R

Reverse Breakdown Voltage IR = 100µA 2.500 V
Reverse Breakdown Voltage I

Tolerance ±19 ±21 ±29 mV (max)

I

RMIN

∆V

R

Minimum Operating Current 45 µA

/∆T Average Reverse Breakdown IR = 10mA 20 ppm/°C

Voltage Temperature I
Coefficient IR = 100µA 15 ppm/°C (max)

/∆IRReverse Breakdown Voltage I

∆V

R

Change with Operating 0.8 0.8 0.8 mV (max)
Current Change 1.0 1.0 1.0 mV (max)

Z

e

∆V

R

N

R

Reverse Dynamic Impedance IR = 1mA, f = 120Hz 0.3 Ω

Wideband Noise IR = 100µA

Reverse Breakdown Voltage t = 1000hrs
Long Term Stability T = 25°C ±0.1°C 120 ppm

MIN

to T

; all other limits TA = TJ = 25°C. The grades A, B, C, and D designate initial Reverse

MAX

LM4040AIM3 LM4040BIM3 LM4040CIM3

(Note 4) Limits Limits Limits (Limit)

(Note 5) (Note 5) (Note 5)

= 100µA ±2.5 ±5.0 ±12 mV (max)

R

60 60 60 µA (max)
65 65 65 µA (max)

= 1mA 15 100 100 100 ppm/°C (max)

R

≤ IR 1mA 0.3 mV

RMIN

1mA ≤ I

15mA 2.5 mV

R

0.6 0.6 0.6 mV (max)

8.0 8.0 8.0 mV (max)

IAC = 0.1 I

R

0.8 0.8 0.9 Ω (max)

10Hz ≤ f ≤ 10kHz 35 µV

IR = 100µA

RMS

Symbol Parameter Conditions Typical Units

LM4040DIM3

(Note 4) Limits (Limit)

(Note 5)

V

R

I

RMIN

Reverse Breakdown Voltage IR = 100µA 2.500 V
Reverse Breakdown Voltage I

Tolerance ±49 mV (max)

= 100µA ±25 mV (max)

R

Minimum Operating Current 45 µA

65 µA (max)
70 µA (max)

/∆T Average Reverse Breakdown IR = 10mA 20 ppm/°C

∆V

R

Voltage Temperature I
Coefficient IR = 100µA 15 ppm/°C (max)

/∆IRReverse Breakdown Voltage I

∆V

R

Change with Operating 1.0 mV (max)

= 1mA 15 150 ppm/°C (max)

R

≤ IR 1mA 0.3 mV

RMIN

Current Change 1.2 mV (max)

1mA ≤ I

15mA 2.5 mV

R

8.0 mV (max)

10.0 mV (max)

Z

e

∆V

R

N

R

Reverse Dynamic Impedance IR = 1mA, f = 120Hz 0.3 Ω

IAC = 0.1 I

R

1.1 Ω (max)

Wideband Noise IR = 100µA

10Hz ≤ f ≤ 10kHz 35 µV

RMS

Reverse Breakdown Voltage t = 1000hrs
Long Term Stability T = 25°C ±0.1°C 120 ppm

IR = 100µA

LM4040/4041 4 January 2000

LM4040/4041 Micrel

LM4040-4.1 Electrical Characteristics

Boldface limits apply for TA = TJ = T

Breakdown Voltage tolerance of ±0.1%, ±0.2%, ±0.5%, and ± 1.0% respectively.

Symbol Parameter Conditions Typical Units

V

R

Reverse Breakdown Voltage IR = 100µA 4.096 V
Reverse Breakdown Voltage I

Tolerance ±31 ±35 mV (max)

I

RMIN

∆V

R

Minimum Operating Current 50 µA

/∆T Average Reverse Breakdown IR = 10mA 30 ppm/°C

Voltage Temperature I
Coefficient IR = 100µA 20 ppm/°C (max)

/∆IRReverse Breakdown Voltage I

∆V

R

Change with Operating 0.9 0.9 mV (max)
Current Change 1.2 1.2 mV (max)

Z

e

∆V

R

N

R

Reverse Dynamic Impedance IR = 1mA, f = 120Hz 0.5 Ω

Wideband Noise IR = 100µA

Reverse Breakdown Voltage t = 1000hrs
Long Term Stability T = 25°C ±0.1°C 120 ppm

MIN

to T

; all other limits TA = TJ = 25°C. The grades A, B, C, and D designate initial Reverse

MAX

LM4040AIM3 LM4040BIM3

(Note 4) Limits Limits (Limit)

(Note 5) (Note 5)

= 100µA ±4.1 ±8.2 mV (max)

R

68 68 µA (max)
73 73 µA (max)

= 1mA 20 100 100 ppm/°C (max)

R

≤ IR 1mA 0.5 mV

RMIN

1mA ≤ I

15mA 3.5 mV

R

7.0 7.0 mV (max)

10.0 10.0 mV (max)

IAC = 0.1 I

R

1.0 1.0 Ω (max)

10Hz ≤ f ≤ 10kHz 80 µV

IR = 100µA

RMS

Symbol Parameter Conditions Typical Units

LM4040CIM3 LM4040DIM3

(Note 4) Limits Limits (Limits)

(Note 5) (Note 5)

V

R

I

RMIN

Reverse Breakdown Voltage IR = 100µA 4.096 V
Reverse Breakdown Voltage I

Tolerance ±47 ±81 mV (max)

= 100µA ±20 ±41 mV (max)

R

Minimum Operating Current 50 µA

68 73 µA (max)
73 78 µA (max)

/∆T Average Reverse Breakdown IR = 10mA 30 ppm/°C

∆V

R

Voltage Temperature I
Coefficient IR = 100µA 20 ppm/°C (max)

/∆IRReverse Breakdown Voltage I

∆V

R

Change with Operating 0.9 1.2 mV (max)

= 1mA 20 100 150 ppm/°C (max)

R

≤ IR 1mA 0.5 mV

RMIN

Current Change 1.2 1.5 mV (max)

1mA ≤ I

15mA 3.0 mV

R

7.0 9.0 mV (max)

10.0 13.0 mV (max)

Z

e

∆V

R

N

R

Reverse Dynamic Impedance IR = 1mA, f = 120Hz 0.5 Ω

IAC = 0.1 I

R

1.0 1.3 Ω (max)

Wideband Noise IR = 100µA

10Hz ≤ f ≤ 10kHz 80 µV

RMS

Reverse Breakdown Voltage t = 1000hrs
Long Term Stability T = 25°C ±0.1°C 120 ppm

IR = 100µA

January 2000 5 LM4040/4041