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LM4040 Precision micropower shunt voltage references
Description
The LM4040 is a family of bandgap circuits designed to achieve precision micro-power voltage references of 2.5V, 3.0V and 5.0V. The devices are available in 0.2% B-grade, 0.5% Cgrade and 1% D-grade initial tolerances. They are available in small outline SOT23 and SC75 surface mount package which are ideal for applications where space saving is important. Excellent performance is maintained over the 60A to 15mA 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 LM4040 voltage reference. The LM4040 is also available with AEC-Q100 approval; see LM4040Q datasheet
Features
* * * Small packages: SOT23 & SC75 No output capacitor required Output voltage tolerance * * * * * * * LM4040B LM4040C LM4040D 0.2% at 25C 0.5% at 25C 1% at 25C
Applications
* * * * * * Battery powered equipment Precision power supplies Portable instrumentation Portable communications devices Notebook and palmtop computers Data acquisition systems
Low output noise (10Hz to 10kHz) .............. 45 VRMS Wide operating current range 60 A to 15mA Extended temperature range -40C to +125C Low temperature coefficient 100 ppm/C (max)
Pinout information
LM4040 F (SOT23) Cathode 3
1*
LM4040 H5 (SC70) Anode N/C Cathode N/C
Top view
* Pin 1 must be left floating or connected to pin 2
N/C
Anode 2
Top view
* Pin 1 must be left floating or connected to pin 2
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LM4040
Ordering information
25oC Tol Voltage (V) Order Code Package Part mark Status Reel Size Tape Width Quantity per reel
2.5 0.2% 3.0 5.0 2.5 0.5% 3.0 5.0 2.5 1% 3.0 5.0
LM4040B25FTA LM4040B25H5TA LM4040B30FTA LM4040B30H5TA LM4040B50FTA LM4040B50H5TA LM4040C25FTA LM4040C25H5TA LM4040C30FTA LM4040C30H5TA LM4040C50FTA LM4040C50H5TA LM4040D25FTA LM4040D25H5TA LM4040D30FTA LM4040D30H5TA LM4040D50FTA LM4040D50H5TA
SOT23 SC75 SOT23 SC75 SOT23 SC75 SOT23 SC75 SOT23 SC75 SOT23 SC75 SOT23 SC75 SOT23 SC75 SOT23 SC75
R2B R2B R3B R3B R5B R5B R2C R2C R3C R3C R5C R5C R2D R2D R3D R3D R5D R5D
Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active
7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7", 7",
180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm 180mm
8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm 8mm
3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000
Absolute maximum ratings
Continuous reverse current (IR) ...................................... 20mA Continuous forward current (IREF) .................................. 10mA Operating junction temperature ..................................... -40C to 150C Storage temperature ....................................................... -55C to 150C Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin.
Package thermal data
Package SOT23 SC75
JA
PDIS Tamb =25C, TJ = 150C 330mW 330mW
380C/W 380C/W
Recommended operating conditions
Min. Reverse current Operating ambient temperature range 0.06 -40 Max. 15 125 Units mA C
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LM4040 - 2.5
Electrical characteristics
Over recommended operating conditions, Tamb = 25C, unless otherwise stated.
Symbol Parameter Conditions Tamb Reverse breakdown voltage VREF Reverse breakdown voltage tolerance IR = 100 A 25C 2.5 Typ. LM404 B limits LM4040 C limits LM4040 D limits Units
V
25C IR = 100 A -40 to 85C -40 to 125C 25C 45
5 21 30 60 65 68 20
12 29 38 60 65 68
25 49 63 65 70 73 A mV
IRMIN
Minimum operating current IR = 10mA IR = 1mA, IR = 100 A
-40 to 85C -40 to 125C
Average reverse breakdown VR/ T voltage temperature coefficient
-40 to 125C
15 15
100
100
150
ppm/C
25C Reverse breakdown VR/ IR change with current IRMIN < IR < 1mA -40 to 85C -40 to 125C 25C 1mA < IR < 15 mA -40 to 85C -40 to 125C ZR en VR Dynamic output impedance Noise voltage Long term stability (non cumulative) Thermal hysteresis IR = 1mA, f = 120Hz IAC = 0.1IR IR = 100 A 10Hz < f < 10kHz t = 1000Hrs IR = 100 A
0.3
0.8 1.0 1.0
0.8 1.0 1.0 6.0 8.0 8.0 0.9
1.0 1.2 1.2 mV 8.0 10.0 10.0 1.1
2.5
6.0 8.0 8.0
0.3
0.8
35 120
VRMS ppm
VHYST
T = -40C to +125C
0.08
%
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LM4040 - 3.0
Electrical characteristics
Over recommended operating conditions, Tamb = 25C, unless otherwise stated
Symbol Parameter
Conditions Tamb
Typ.
LM404 B limits
LM4040 C limits
LM4040 D limits
Units
Reverse breakdown voltage VREF Reverse breakdown voltage tolerance
IR = 100 A
25C
3.0
V
25C IR = 100 A -40 to 85C -40 to 125C 25C 47
6 26 TBD 62 67 70 20
15 34 45 62 67 70
30 59 75 67 72 75 A mV
IRMIN
Minimum operating current IR = 10mA IR = 1mA, IR = 100 A
-40 to 85C -40 to 125C
Average reverse breakdown VR/ T voltage temperature coefficient
-40 to 125C
15 15
100
100
150
ppm/C
25C Reverse breakdown VR/ IR change with current IRMIN < IR < 1mA -40 to 85C -40 to 125C 25C 1mA < IR < 15 mA -40 to 85C -40 to 125C ZR en VR Dynamic output impedance Noise voltage Long term stability (non cumulative) Thermal hysteresis IR = 1mA, f = 120Hz IAC = 0.1IR IR = 100 A 10Hz < f < 10kHz t = 1000Hrs IR = 100 A
0.4
0.8 1.1 1.1
0.8 1.1 1.1 6.0 9.0 9.0 0.9
1.1 1.3 1.3 mV 8.0 11.0 11.0 1.2
2.7
6.0 9.0 9.0
0.4
0.9
35 120
VRMS ppm
VHYST
T = -40C to +125C
0.08
%
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LM4040 - 5.0
Electrical characteristics
Over recommended operating conditions, Tamb = 25C, unless otherwise stated.
Symbol Parameter Conditions Tamb Reverse breakdown voltage VREF Reverse breakdown voltage tolerance IR = 100 A 25C 5.0 Typ. LM404 B limits 5.0 LM4040 C limits LM4040 D limits Units
V
25C IR = 100 A -40 to 85C -40 to 125C 25C 54
10 43 60 74 80 83 30
25 58 75 74 80 83
50 99 125 79 85 88 A mV
IRMIN
Minimum operating current IR = 10mA IR = 1mA, IR = 100 A
-40 to 85C -40 to 125C
Average reverse breakdown VR/ T voltage temperature coefficient
-40 to 125C
20 20
100
100
150
ppm/C
25C Reverse breakdown VR/ IR change with current IRMIN < IR < 1mA -40 to 85C -40 to 125C 25C 1mA < IR < 15 mA -40 to 85C -40 to 125C ZR en VR Dynamic output impedance Noise voltage Long term stability (non cumulative) Thermal hysteresis IR = 1mA, f = 120Hz IAC = 0.1IR IR = 100 A 10Hz < f < 10kHz t = 1000Hrs IR = 100 A
0.5
1.0 1.4 1.4
1.0 1.4 1.4 8.0 12.0 12.0 1.1
1.3 1.8 1.8 mV 10.0 15.0 15.0 1.5
3.5
8.0 12.0 12.0
0.5
1.1
80 120
VRMS ppm
VHYST
T = -40C to +125C
0.08
%
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LM4040-2.5 Typical Characteristics
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LM4040-3.0 Typical characteristics
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LM4040
LM4040-5.0 Typical characteristics
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LM4040 - 2.5, 3.0 and 5.0 Start up characteristics
LM4040-3.0
LM4040-5.0
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Application information
VS IR + IL IL VR IR
In a conventional shunt regulator application, an external series resistor (RS) is connected between the supply voltage, VS, and the LM4040 RS determines the current that flows through the load (IL) and the LM4040 (IR). Since load current and supply voltage may vary, RS should be small enough 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 15 mA. RS is determined by the supply voltage, (VS), the load and operating current, (IL and IR), and the LM4040's reverse breakdown voltage, VR.
RS
RS =
VS - VR IL + IR
Printed circuit board layout considerations
LM4040s in the SOT23 package have the die attached to pin 1, which results in an electrical contact between pin 2 and pin 3. Therefore, pin 1 of the SOT-23 package must be left floating or connected to pin 2. LM4040s in the SC75 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.
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LM4040
Package outline - SOT23
E
e b 3 leads e1
L1
E1
D
A A1 L c
Dim. A A1 b C D e
Millimeters Min. 0.01 0.30 0.085 2.80 Max. 1.12 0.10 0.50 0.120 3.04 -
Inches Min. 0.0004 0.012 0.003 0.110 Max. 0.044 0.004 0.020 0.008 0.120
Dim. e1 E E1 L L1 -
Millimeters Min. 2.10 1.20 0.25 0.45 Max. 2.64 1.40 0.62 0.62 1.90 NOM
Inches Max. 0.083 0.047 0.018 0.018 Max. 0.104 0.055 0.024 0.024 0.075 NOM
0.95 NOM
0.0375 NOM
Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches
Package outline SC-70-5
Dim. A A1 A2 b C D
Millimeters Min. 0.80 0.80 0.15 0.08 Max. 1.10 0.10 1.00 0.30 0.25
Inches Min. 0.0315 0.0315 0.006 0.0031 Max. 0.0433 0.0039 0.0394 0.0118 0.0098
Dim. E E1 e e1 L ao
Millimeters Min. Max. 2.10 BSC 1.25 BSC 0.65 BSC 1.30 BSC 0.26 0 0.46 8
Inches Max. Max. 0.0826 BSC 0.0492 BSC 0.0255 BSC 0.0511 BSC 0.0102 0 0.0181 8
2.00 BSC
0.0787 BSC
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LM4040
Definitions Product change Diodes Incorporated reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. Customers are solely responsible for obtaining the latest relevant information before placing orders. Applications disclaimer The circuits in this design/application note are offered as design ideas. It is the responsibility of the user to ensure that the circuit is fit for the user's application and meets with the user's requirements. No representation or warranty is given and no liability whatsoever is assumed by Diodes Inc. with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Diodes Inc. does not assume any legal responsibility or will not be held legally liable (whether in contract, tort (including negligence), breach of statutory duty, restriction or otherwise) for any damages, loss of profit, business, contract, opportunity or consequential loss in the use of these circuit applications, under any circumstances. Life support Diodes Zetex products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated . As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labelling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Reproduction The product specifications contained in this publication are issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. Terms and Conditions All products are sold subjects to Diodes Zetex' terms and conditions of sale, and this disclaimer (save in the event of a conflict between the two when the terms of the contract shall prevail) according to region, supplied at the time of order acknowledgement. For the latest information on technology, delivery terms and conditions and prices, please contact your nearest Diodes sales office or visit: www.zetex.com Quality of product Diodes Zetex Semiconductors Limited is an ISO 9001 and TS16949 certified semiconductor manufacturer. To ensure quality of service and products we strongly advise the purchase of parts directly from Diodes Zetex Semiconductors Limited or one of our regionally authorized distributors. For a complete listing of authorized distributors please visit: www.zetex.com or www.diodes.com. Diodes Zetex Semiconductors does not warrant or accept any liability whatsoever in respect of any parts purchased through unauthorized sales channels. ESD (Electrostatic discharge) Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices. The possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. The extent of damage can vary from immediate functional or parametric malfunction to degradation of function or performance in use over time. Devices suspected of being affected should be replaced. Green compliance Diodes Zetex Semiconductors is committed to environmental excellence in all aspects of its operations which includes meeting or exceeding regulatory requirements with respect to the use of hazardous substances. Numerous successful programs have been implemented to reduce the use of hazardous substances and/or emissions. All Diodes Zetex components are compliant with the RoHS directive, and through this it is supporting its customers in their compliance with WEEE and ELV directives. Product status key: "Preview" Future device intended for production at some point. Samples may be available "Active" Product status recommended for new designs "Last time buy (LTB)" Device will be discontinued and last time buy period and delivery is in effect "Not recommended for new designs" Device is still in production to support existing designs and production "Obsolete" Production has been discontinued Datasheet status key: "Draft version" This term denotes a very early datasheet version and contains highly provisional information, which may change in any manner without notice. "Provisional version" This term denotes a pre-release datasheet. It provides a clear indication of anticipated performance. However, changes to the test conditions and specifications may occur, at any time and without notice. "Issue" This term denotes an issued datasheet containing finalized specifications. However, changes to specifications may occur, at any time and without notice. Diodes Zetex sales offices Europe Zetex GmbH Kustermann-park Balanstrae 59 D-81541 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 europe.sales@zetex.com Americas Zetex Inc 700 Veterans Memorial Highway Hauppauge, NY 11788 USA Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 usa.sales@zetex.com Asia Pacific Diodes Zetex (Asia) Ltd 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com Corporate Headquarters Diodes Incorporated 15660 N. Dallas Parkway Suite 850, Dallas TX75248, USA
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(c) 2008 Published by Diodes Incorporated
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