LM4041CEX3-1.2+T - Maxim - Datasheet.Directory

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 1 of 7

www.diodes.com September 2011

Description

The LM4041 is a bandgap circuit designed to achieve a

precision micro-power voltage reference of 1.225 V. The

device is available in the small outline SOT23 and SC70-5

surface mount packages which are ideal for applications

where space saving is important.

Both packages are available to 0.5% C grade and 1%

D grade for precision applications. Excellent performance is

maintained over the 60µA to 12mA operating current range

with a typical temperature coefficient of only 20ppm/°C. The

device has been designed to be highly tolerant of capacitive

loads so maintaining excellent stability.

This device offers a pin for pin compatible alternative to the

LM4041 voltage reference in both adjustable and 1.225V

output variants.

Features

• Small packages: SOT23, SC70-5

• No output capacitor required

• Output voltage tolerance

• LM4041C: ±0.5% at 25°C

• LM4041D: ±1% at 25°C

• Low output noise: 20µVrms

(10Hz to 10kHz)

• Wide operating current range: 60µA to 12mA

• Extended temperature range: -40°C to +125°C

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

• All parts AEC-Q100 Grade1 qua lified

Applications

• Battery powered equipment

• Precision power supplies

• Portable instrumentation

• Portable communications devices

• Notebook and palmtop computers

• Data acquisition systems

Pin Assignments

LM4041_F (SOT23)

Pin 3 must left floating or connected to pin 2.

LM4041_ADJF….(SOT23)

LM4041_H5 (SC70-5)

Pin 2 must be left floating or connected to pin 1

LM4041_ADJH5 (SC70-5)

3 N/C

CATHODE 1

ANODE 2

3 ANODE

REF 1

CATHODE 2

5 N/C

ANODE 1

CATHODE 3

N/C 2

4 N/C

5 REF

4 N/C

N/C 1

A

NODE 2

CATHODE 3

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 2 of 7

www.diodes.com September 2011

Absolute Maximum Ratings

Description Rating Unit

Continuous Reverse Current (IR) 20 mA

Continuous For ward Current (IF) 10 mA

Maximum Output Voltage (LM4041_ADJ) 15 V

Junction Temperature -40 to 155 °C

Storage Temperature -55 to 150 °C

ESD Ratings

Human Body Model 4000 V

Machine Model 200 V

These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure. Operation at the absolute

maximum rating, for extended periods may reduce device reliability.

Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken

when handling and transporting these devices.

Package Thermal Data

Package θJA PDIS

T

A

= 25°C, TJ = 150°C

SOT23 380°C/W 330mW

SC70-5 420°C/W 300mW

Recommended Operating Conditions

Parameter Min Max Units

Reverse Current 0.06 12 mA

Output Voltage Range 1.24 10 V

Operating Ambient Temperature Range -40 125 °C

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 3 of 7

www.diodes.com September 2011

Electrical Characteristics

LM4041-1.2

Electrical characteristics over recommended operating conditions, TA = 25°C, unless otherwise stated, IRMIN <IR<12mA, VREF<VOUT<10V.

LM4041C and LM4041D have initial tolerances of 0.5% and 1% respectively.

Symbol Parameter Conditions Typ LM4041C

Limits LM4041D

Limits Units

T

A

VREF

Reverse Breakdown Voltage

IR = 100 µA

25°C 1.225 V

Reverse Breakdown Voltage

Tolerance

25°C ±6 ±12

mV

-40 to 85°C ±14 ±24

-40 to 125°C ±18.4 ±31

IRMIN Minimum Operating Current 25°C 45 60 65 µA -40 to 85°C 65 70

-40 to 125°C 68 73

ΔVR/ΔΤ Average Reverse Breakdown

Voltage Temperature Coefficient

IR = 10 mA -40 to 125°C ±20 ppm/°C

IR = 1 mA, ±15 ±100 ±150

IR = 100 µA ±15

ΔVR/ΔΙR Reverse Breakdow n Change With

Current

IRMIN < IR < 1mA 25°C 0.7 1.5 2.0

mV

-40 to 85°C 2.0 2.5

-40 to 125°C 2.0 2.5

1mA < IR < 12 mA 25°C 2.5 6.0 8.0

-40 to 85°C 8.0 10.0

-40 to 125°C 8.0 10.0

ZR Dynamic Output Impedance IR = 1mA, f = 120Hz, IAC = 0.1IR 0.5 1.5 2.0

Ω

en Noise Voltage IR = 100µA 10Hz < f < 10kHz 20 µVRMS

ΔVR Long Term Stability (Non

cumulative) t = 1000Hrs IR = 100µA 120 ppm

LM4041-Adj

Electrical characteristics over recommended operating conditions, TA = 25°C, IRMIN <IR <12 mA, VREF <VOUT <10V unless otherwise stated. The

grade D designates initial reference voltage tolerance of ±1% and is measured at an output/cathode voltage of 5V.

Symbol Parameter Conditions Typ LM4041D

Limits Units

T

A

VREF

Reverse Breakdown Voltage

IR = 100 µA, VKA = 5V

25°C 1.233 V

Reverse Breakdown Voltage

Tolerance

25°C ±12

mV

-40 to 85°C ±24

-40 to 125°C ±30

IRMIN Minimum Operating Current 25°C 45 65 µA -40 to 85°C 70

-40 to 125°C 73

ΔVR/ΔΤ Average Reverse Breakdown

Voltage Temperature

Coefficient

IR = 10 mA -40 to 125°C ±20

ppm/°C

IR = 1 mA, ±15 ±150

IR = 100 µA ±15

ΔVR/ΔVK Reference voltage change with

cathode voltage change IR = 1mA 25°C -1.55 -2.5 mV/V -40 to 85°C -3.0

-40 to 125°C -4.0

IREF Reference input current 25°C 60 150 nA -40 to 85°C 200

-40 to 125°C 200

ΔVR/ΔΙR Reverse Breakdow n Change

With Current

IRMIN < IR < 1mA

VOUT > 1.6V

25°C 0.7 2.0

mV

-40 to 85°C 2.5

-40 to 125°C 2.5

1mA < IR < 12 mA

VOUT > 1.6V

25°C 2 6.0

-40 to 85°C 8.0

-40 to 125°C 10.0

ZR Dynamic Output Impedance IR = 1mA,

f = 120Hz

IAC = 0.1IR

VKA = VREF 0.5

Ω

VKA = 10V 2

en Noise Voltage IR = 100µA 10Hz < f < 10kHz 20 µVRMS

ΔVR Long Term Stability

(Non cumulative) t = 1000Hrs IR = 100µA 120 ppm

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 4 of 7

www.diodes.com September 2011

Typical Characteristics LM4041 1.225

0.01

0.1

1

10

100

0.1 1 10 100 1000

Frequency (kHz)

Reference Impedance (Ω)

1mA, 1µF tant

1mA, no cap

150uA, no cap

150uA, 1uF

Output Impedance vs. Frequen cy

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 5 of 7

www.diodes.com September 2011

Application Information

In a conventional shunt regulator application (Figure 1), an

external series resistor (RS) is connected between the

supply voltage, VS, and the LM4041.

RS determines the current that flows through the load (IL)

and the LM4041 (IR). Since load current and supply

voltage may vary, RS should be small enou gh to supply at

least the minimum acceptable IR to the LM4040 even

when the supply voltage is at its minimum and the load

current is at its maximum value. When the supply voltage

is at its maximum and IL is at its minimum, RS should be

large enough so that the current flowing through the

LM4040 is less than 12 mA.

RS is determined by the supply voltage, (VS), the load and

operating current, (IL and IQ), and the LM4040’s reverse

breakdown voltage, VR.

RL

RS

SII VV

R+

−

=

The LM4041 comes in two varients:

• LM4041 with fixed 1.225V output

• LM4041_ADJ wit h variable output voltage.

The LM4041-ADJ’s output voltage can be adjusted to any

value in the range of 1.24V through 10V. The output

voltage is set by the ratio of two external feedback

resistors as shown in Figure 2 and the internal reference

voltage (VR).

The output voltage is found using the equation:

⎟

⎠

⎞

⎜

⎝

⎛+×=

1

2

RO R

R

1VV

Printed circuit board layout considerations

LM4041 with fixed output voltage in the SOT23 package

has the die att ached to pin 1, which res ults in an electrical

contact between pin 2 and pin 1. Therefore, pin 1 of the

SOT23 package must be left floating or connected to

pin 2.

LM4041 with fixed output voltage in the SC70-5 package

have the die attached to pin 2, which results in an

electrical contact between pin 2 and pin 1. Therefore, pin

2 must be left floating or connected to pin1.

RS

VS

IR +

IL

IR

IL

VR

Figure 1

RS

VS

IR + IL

IR

IL

VR

VO

Figure 2

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 6 of 7

www.diodes.com September 2011

Ordering Information

25°C

Tol Voltage

(V) ORDER CODE QUALIFICATION† PACK PART

MARK REEL SIZE TAPE

WIDTH QUANTITY

PER REEL

0.5% 1.225 LM4041CFTA Commercial SOT23 R1C 7”, 180mm 8mm 3000

LM4041CQFTA Automotive SOT23 R1C 7”, 180mm 8mm 3000

LM4041CH5TA Commercial SC70-5 R1C 7”, 180mm 8mm 3000

1% 1.225 LM4041DFTA Commercial SOT23 R1D 7”, 180mm 8mm 3000

LM4041DQFTA Automotive SOT23 R1D 7”, 180mm 8mm 3000

LM4041DH5TA Commercial SC70-5 R1D 7”, 180mm 8mm 3000

Adj LM4041DADJFTA Commercial SOT23 RAD 7”, 180mm 8mm 300 0

LM4041DADJH5TA Commercial SC70-5 RAD 7”, 180mm 8mm 3000

† All parts AEC-Q100 grade 1 qualified

Package Outline Information

LM4041

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4041

Document number: DS32020 Rev. 8 - 2 7 of 7

www.diodes.com September 2011

IMPORT ANT NOTI CE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS

DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE (AND THE IR EQUIVALENTS UNDER THE LAWS OF ANY JURIS DICTION).

Diodes Incorporat ed and its subsidiaries reserve t he right to make modifications, enhancements , improvements, correc tions or other

changes without furt her notice to this document and any product descri bed herein. Diodes Inc orporated does not assume any liability

arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any

license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described

herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies

whose products are repres ented on Diodes Incorporated websit e, harm l ess against all damages.

Diodes Incorporat ed does not warrant or acc ept any liabi lity whatsoever in respect of any products purchased t hrough unauthorized

sales c hannel.

Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall

indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees

arising out of, directly or indirectly, any cl aim of personal i nj ury or death ass ociated with such unintended or unauthorized application.

Products desc ribed herein may be covered by one or more Unit ed States, int ernational or foreign patents pending. Product names

and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

LIFE SUPPORT

Diodes Incorporat ed products are specific ally not authorized for use as critical components in life support devices or systems without

the express written app roval of t he Chief Executive Off icer of Diodes Incorporated. As used herein:

A. Life support device s or syst ems are devices or systems which:

1. are intended to impl ant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with i nst ruct i ons for us e provided

in the labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a lif e support devic e or system whose failure to perform can be reasonably expected

to cause the failure of t he life support devi ce or to affect its safety or effecti veness .

Customers represent t hat they have all necessary expertise in the safety and regulatory ramifications of their life support devices or

systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements

concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,

notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,

Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes

Incorporat ed products in such safety-critical, life support devices or syst ems .

www.diodes.com