MSG PRECISION MICROPOWER SHUNT V0
IncoI-GIAYED
Description
Pin Assignments
The LM4041 is a bandgap Cll’CulI designed to achieve a
precislon micro-power voltage reference of 1.225 V. The
devlce is available in the small outline SOT23 and 5070-5
surlace mount packages whlch are ideal for appllcatlohs
where space saving is important
Both packages are available to 0.5% C grade and 1%
Dgrade lor precision applications. Excellent performance l5
maintained over the BOpA to 12mA operating current range
wrth a typlcal temperature coelllcleht ol only 20ppm/“C. The
device has been deslgned to be hlghly tolerant ol capacitive
loads so maintaining excellent stability.
This device offers a pin for pin compatible alternative to the
LMADAT voltage relerence in both adjustable and 1.225V
output variants
Features
. Small packages:
. No output capacitor required
. Output voltage tolerance
SOT23. 8070-5
- LM4041C: 10.5% at 25"C
- LM4041D: 11% at 25"C
. Low output noise: 20erms
(1on to 10kHz)
. Wide operatlhg current range: SOuA to 12mA
. Extended temperature range: -40"C to +125°c
. Low temperature coelliclent : TUUppm/‘fl (max)
- All parts AEC-Q100 Grade1 qualllled
Applications
. Battery powered equipment
. Preclsloh power supplles
. Portable instrumehtatlon
. Portable commuhlcatiohs devices
. Notebook and palmtop computers
. Data acquisitlon systems
LM4041
Document number D532020 Rev 572
LMAML
CATHODE m
ANODE
Pm 3 must lett tlaatlng or no
LM40417ADJF.”
REF E
CATHODE E
LM40417H5 (sc
ANODE I: :|
MO l:
CATHODE E :|
Pm 2 must be leil floating or c
LM40417ADJH5 (
El
l_ll_ll_l
El
LM4041
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LM4041
Document number: DS32020 Rev. 8 - 2
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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 qualified
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
HODES
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PDIs
LM4041
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Absolute Maximum Ratings
Description Rating Unit
Continuous Reverse Current (IR) 20 mA
Continuous Forward 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
MSG
Incol-nnAYEn
LM4041
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LM4041
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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 Breakdown 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 Breakdown 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
wDESQ ms
Incor-olnvsn
Typical Characteristics LM4041 1.225
400
mu
350 Q 90
A 3 so
N -
1300 S 70
Z r. 60
20
E 5 a 50
40
$200 “1
E E 30
o a:
Z150 a 20
n: 10
100 —“ 0
1 10 wk 100k a 2
100 1k
Frequency (Hz)
1
VW Reverse Voltage (V)
Noise Voltage vs Frequency
Reverse Current vs Voltage
m
u
e
n:
0mm
o
lnpul and Output Voltage (V)
u
U 2 4 6 E W l2 N IE
Time (us)
Pulse Response
100
:3
Relevance Impedance (m
o
um
n1 1 10 mm 10
Frequency (kHz)
LM4041
Ducumenl number D532020 Rev 872 WWW-
LM4041
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LM4041
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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. Frequency
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LM4041
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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 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 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 with 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 attached to pin 1, which results 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
m5.
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Package outline - SOT23
Dim. M Ine‘els Inches Dim. lmhus
Mln Max. Min Max. Max. Max.
A , 1.12 , 0.044 e! 1.90 NDM 0.075 NOM
A1 0.01 0.10 0.0004 0.000 E 2.10 2.54 0.083 0.104
b 0 30 0,50 0,0! 2 0 020 El L20 1 ‘0 0 0A7 [I 055
C 0,055 0120 0,003 0 008 L 0 25 0 62 0 "IE D 02‘
D 2E0 3,0! 0,!10 0120 L‘ 045 062 (“NE 0024
e 095 NOM 00375 NOM , , ,
mm. Cam”... mmum are .n mummy; Auvmme mmsm m pram... .. mm;
Package autline scv7075
. H7 z ‘
w x
.
.
.
.L .
M lane‘s!) Inches DH“ 0‘": Inchos
Max Min Max. Mm, Max. Max. Max.
1.”) 0.03l5 0 0433 E Z.ID ESC 0.0326 ESE:
0,10 , 0 0035 El I25 ESC 0.0432 ESE:
A2 0.30 1.00 0.03|5 0.0394 2 0.55 ESC 0.0255 ESE:
b 015 030 0006 Hunt! 2‘ 130 ESC 0051! ESE
C 0 05 025 00031 El 0095 L 025 0 ‘5 Cl 0102 0 0181
D 2.00 BSC 0.0787 BSC an O E 0 8
LM4041
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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 3000
LM4041DADJH5TA Commercial SC70-5 RAD 7”, 180mm 8mm 3000
† All parts AEC-Q100 grade 1 qualified
Package Outline Information
MSG
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LM4041
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