TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
FEATURES
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1.225-V Fixed and Adjustable (1.225-V to 10-V)
Outputs
Tight Output Tolerances and Low
Temperature Coefficient
– Max 0.1%, 50 ppm/°C – A Grade
– Max 0.2%, 50 ppm/°C – B Grade
– Max 0.5%, 50 ppm/°C – C Grade
Low Output Noise…20 µVRMS (Typ)
Wide Operating Current Range…
60 µA (Typ) to 12 mA
Stable With All Capacitive Loads; No Output
Capacitor Required
Available in
– Industrial Temperature: –40°C to 85°C
– Extended Temperature: –40°C to 125°C
1.2 V...DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
CATHODE
1
Data-Acquisition Systems
Power Supplies and Power-Supply Monitors
Instrumentation and Test Equipment
Process Control
Precision Audio
Automotive Electronics
Energy Management/Metering
Battery-Powered Equipment
1.2 V...DCK (SC-70) PACKAGE
(TOP VIEW)
ANODE
3 *
ANODE 2
1
5
NC
4
NC
* 2
CATHODE 3
* Pin 3 is attached to Substrate and must
be connected to ANODE or left open.
NC – No internal connection
* Pin 2 is attached to Substrate and must
be connected to ANODE or left open.
Adjustable...DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
Adjustable...DCK (SC-70) PACKAGE
(TOP VIEW)
FB
CATHODE
1
NC 1
3
ANODE
2
ANODE
CATHODE
5 FB
2
3
4 NC
NC – No internal connection
DESCRIPTION/ORDERING INFORMATION
The TL4051 series of shunt voltage references are versatile easy-to-use references suitable for a wide array of
applications. The device is available in a fixed 1.225-V output or an adjustable output whose voltage is
determined by an external resistor divider. The device requires no external capacitors for operation and is stable
with all capacitive loads. Additionally, the reference offers low dynamic impedance, low noise, and low
temperature coefficient to ensure a stable output voltage over a wide range of operating currents and
temperatures.
The TL4051 is offered in three initial tolerances, ranging from 0.1% (max) for the A grade to 0.5% (max) for the
C grade. Thus, a great deal of flexibility is offered to designers in choosing the best cost-to-performance ratio for
their applications. Packaged in the space-saving SOT-23-3 and SC-70 packages and requiring a minimum
current of 45 µA (typ), the TL4051 also is ideal for portable applications.
The TL4051xI is characterized for operation over an ambient temperature range of –40°C to 85°C. The
TL4051xQ is characterized for operation over an ambient temperature range of –40°C to 125°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated
TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
ORDERING INFORMATION (1)
TA
DEVICE GRADE
PACKAGE (2)
VZ
SOT-23-3 – DBZ
A grade:
0.1% initial
accuracy
and
50 ppm/°C
temperature
coefficient
ADJ
SC-70 – DCK
SOT-23-3 – DBZ
1.2 V
SC-70 – DCK
SOT-23-3 – DBZ
–40°C to 85°C
B grade:
0.2% initial
accuracy
and
50 ppm/°C
temperature
coefficient
ADJ
SC-70 – DCK
SOT-23-3 – DBZ
1.2 V
SC-70 – DCK
SOT-23-3 – DBZ
C grade:
0.5% initial
accuracy
and
50 ppm/°C
temperature
coefficient
ADJ
SC-70 – DCK
SOT-23-3 – DBZ
1.2 V
SC-70 – DCK
(1)
(2)
(3)
2
ORDERABLE
PART NUMBER
Reel of 3000
TL4051AIDBZR
Reel of 250
TL4051AIDBZT
Reel of 3000
TL4051AIDCKR
Reel of 250
TL4051AIDCKT
Reel of 3000
TL4051A12IDBZR
Reel of 250
TL4051A12IDBZT
Reel of 3000
TL4051A12IDCKR
Reel of 250
TL4051A12IDCKT
Reel of 3000
TL4051BIDBZR
Reel of 250
TL4051BIDBZT
Reel of 3000
TL4051BIDCKR
Reel of 250
TL4051BIDCKT
Reel of 3000
TL4051B12IDBZR
Reel of 250
TL4051B12IDBZT
Reel of 3000
TL4051B12IDCKR
Reel of 250
TL4051B12IDCKT
Reel of 3000
TL4051CIDBZR
Reel of 250
TL4051CIDBZT
Reel of 3000
TL4051CIDCKR
Reel of 250
TL4051CIDCKT
Reel of 3000
TL4051C12IDBZR
Reel of 250
TL4051C12IDBZT
Reel of 3000
TL4051C12IDCKR
Reel of 250
TL4051C12IDCKT
TOP-SIDE
MARKING (3)
TN2_
97_
TN8_
9D_
TN3_
98_
TN9_
9E_
TN4_
99_
TNU_
9F_
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
The actual top-side marking has one additional character that designates the assembly/test site.
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TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
ORDERING INFORMATION
TA
DEVICE GRADE
PACKAGE (2)
VZ
SOT-23-3 – DBZ
A grade:
0.1% initial
accuracy
and
50 ppm/°C
temperature
coefficient
ADJ
SC-70 – DCK
SOT-23-3 – DBZ
1.2 V
SC-70 – DCK
SOT-23-3 – DBZ
–40°C to 125°C
B grade:
0.2% initial
accuracy
and
50 ppm/°C
temperature
coefficient
ADJ
SC-70 – DCK
SOT-23-3 – DBZ
1.2 V
SC-70 – DCK
SOT-23-3 – DBZ
C grade:
0.5% initial
accuracy
and
50 ppm/°C
temperature
coefficient
ADJ
SC-70 – DCK
SOT-23-3 – DBZ
1.2 V
SC-70 – DCK
(1)
(2)
(3)
(1)
ORDERABLE
PART NUMBER
Reel of 3000
TL4051AQDBZR
Reel of 250
TL4051AQDBZT
Reel of 3000
TL4051AQDCKR
Reel of 250
TL4051AQDCKT
Reel of 3000
TL4051A12QDBZR
Reel of 250
TL4051A12QDBZT
Reel of 3000
TL4051A12QDCKR
Reel of 250
TL4051A12QDCKT
Reel of 3000
TL4051BQDBZR
Reel of 250
TL4051BQDBZT
Reel of 3000
TL4051BQDCKR
Reel of 250
TL4051BQDCKT
Reel of 3000
TL4051B12QDBZR
Reel of 250
TL4051B12QDBZT
Reel of 3000
TL4051B12QDCKR
Reel of 250
TL4051B12QDCKT
Reel of 3000
TL4051CQDBZR
Reel of 250
TL4051CQDBZT
Reel of 3000
TL4051CQDCKR
Reel of 250
TL4051CQDCKT
Reel of 3000
TL4051C12QDBZR
Reel of 250
TL4051C12QDBZT
Reel of 3000
TL4051C12QDCKR
Reel of 250
TL4051C12QDCKT
TOP-SIDE
MARKING (3)
TN5_
9A_
TNV_
9G_
TN6_
9B_
TNW_
9H_
TN7_
9C_
TNY_
9J_
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
The actual top-side marking has one additional character that designates the assembly/test site.
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TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
FUNCTIONAL BLOCK DIAGRAM
CATHODE
+
_
VREF
(see Note A)
See
Note B
FB
(see Note A)
See
Note B
ANODE
A.
TL4051x (Adjustable) only
B.
TL4051x12 only
Absolute Maximum Ratings (1)
over free-air temperature range (unless otherwise noted)
MIN
VZ
Continuous cathode voltage
IZ
Continuous cathode current
θJA
Package thermal impedance (2) (3)
TJ
Operating virtual junction temperature
Tstg
Storage temperature range
(1)
(2)
(3)
–10
MAX
V
20
mA
DBZ package
206
DCK package
252
–65
UNIT
15
°C/W
150
°C
150
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions
IZ
Cathode current
VZ
Reverse breakdown voltage (adjustable version)
TA
Free-air temperature
(1)
4
MIN
MAX
(1)
12
mA
10
V
I temperature
–40
85
Q temperature
–40
125
See parametric tables
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UNIT
°C
TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
TL4051x12I Electrical Characteristics
full range TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
Reverse
breakdown
voltage
VZ
TEST CONDITIONS
TL4051A12I
TA
MIN
TYP
TL4051B12I
MAX
MIN
TYP
TL4051C12I
MAX
MIN
TYP
MAX
IZ = 100 µA
25°C
Reverse
breakdown
IZ = 100 µA
voltage tolerance
25°C
–1.2
1.2
–2.4
2.4
–6
6
Full
range
–5.2
5.2
–6.4
6.4
–10.1
10.1
25°C
1.225
39
1.225
60
39
1.225
60
39
UNIT
V
mV
60
IZ,min
Minimum
cathode current
IZ = 10 mA
25°C
±20
±20
±20
IZ = 1 mA
25°C
±15
±15
±15
αVZ
Average
temperature
coefficient of
reverse
breakdown
voltage
25°C
±15
±15
±15
Reverse
breakdown
voltage change
with cathode
current change
IZ,min < IZ < 1 mA
ZZ
Reverse
dynamic
impedance
IZ = 1 mA,
f = 120 Hz,
IAC = 0.1 IZ
25°C
0.5
0.5
0.5
Ω
eN
Wideband noise
IZ = 100 µA,
10 Hz ≤ f ≤ 10 kHz
25°C
20
20
20
µVRMS
Long-term
stability of
reverse
breakdown
voltage
t = 1000 h,
TA = 25°C ± 0.1°C,
IZ = 100 µA
25°C
120
120
120
ppm
Thermal
hysteresis (1)
∆TA = –40°C to 125°C
0.36
0.36
0.36
mV/V
Full
range
IZ = 100 µA
Full
range
25°C
DVZ
DIZ
VHYST
(1)
65
±50
0.3
Full
range
25°C
1 mA < IZ < 12 mA
65
1.1
±50
0.3
1.5
1.8
Full
range
6
65
1.1
8
6
ppm/°C
±50
0.3
1.5
1.8
µA
1.1
1.5
1.8
8
6
mV
8
Thermal hysteresis is defined as VZ,25°C (after cycling to –40°C) – VZ,25°C (after cycling to 125°C).
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TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
TL4051x12Q Electrical Characteristics
full range TA = –40°C to 125°C (unless otherwise noted)
PARAMETER
Reverse
breakdown
voltage
VZ
TEST CONDITIONS
TL4051A12Q
TA
MIN
TL4051B12Q
MAX
MIN
TYP
TL4051C12Q
MAX
MIN
TYP
MAX
IZ = 100 µA
25°C
Reverse
breakdown
IZ = 100 µA
voltage tolerance
25°C
–1.2
1.2
–2.4
2.4
–6
6
Full
range
–7.4
7.4
–8.6
8.6
–12.2
12.2
25°C
1.225
39
1.225
60
39
1.225
60
39
UNIT
V
mV
60
IZ,min
Minimum
cathode current
IZ = 10 mA
25°C
±20
±20
±20
IZ = 1 mA
25°C
±15
±15
±15
αVZ
Average
temperature
coefficient of
reverse
breakdown
voltage
25°C
±15
±15
±15
Reverse
breakdown
voltage change
with cathode
current change
IZ,min < IZ < 1 mA
ZZ
Reverse
dynamic
impedance
IZ = 1 mA,
f = 120 Hz,
IAC = 0.1 IZ
25°C
0.5
0.5
0.5
Ω
eN
Wideband noise
IZ = 100 µA,
10 Hz ≤ f ≤ 10 kHz
25°C
20
20
20
µVRMS
Long-term
stability of
reverse
breakdown
voltage
t = 1000 h,
TA = 25°C ± 0.1°C,
IZ = 100 µA
25°C
120
120
120
ppm
Thermal
hysteresis (1)
∆TA = –40°C to 125°C
0.36
0.36
0.36
mV/V
Full
range
IZ = 100 µA
DVZ
DIZ
VHYST
(1)
65
±50
0.3
Full
range
25°C
1 mA < IZ < 12 mA
65
Full
range
25°C
6
TYP
1.1
±50
0.3
1.5
1.8
Full
range
6
1.1
1.8
6
0.3
ppm/°C
1.1
1.5
1.8
8
Thermal hysteresis is defined as VZ,25°C (after cycling to –40°C) – VZ,25°C (after cycling to 125°C).
µA
±50
1.5
8
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65
6
mV
8
TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
TL4051xI (Adjustable Version) Electrical Characteristics
full range TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
VREF
TEST CONDITIONS
Reference
voltage
IZ = 100 µA,
VZ = 5 V
Reference
voltage
tolerance (1)
IZ = 100 µA,
VZ = 5 V
IZ,min
Minimum
cathode current
DVREF
DIZ
Reference
voltage change
with cathode
current change
TL4051AI
TA
MIN
25°C
Reference
voltage change
with output
voltage change
IFB
Feedback
current
αVREF
eN
VHYST
TL4051CI
MAX
MIN
1.212
TYP
1.212
–2.4
2.4
–6
6
–5.2
5.2
–6.4
6.4
–10.1
10.1
36
36
65
0.3
Full
range
1.1
0.6
6
0.3
Full
range
–2.8
0.6
70
130
1.1
0.3
6
–1.69
–2.8
150
130
0.6
–1.69
6
mV
–2.8
–3.5
70
150
±20
±20
±20
IZ = 1 mA,
VZ = 2.5 V
25°C
±15
±15
±15
25°C
±15
±15
±15
±50
mV/V
130
150
25°C
±50
1.1
8
IZ = 10 mA,
VZ = 2.5 V
Full
range
µA
1.5
–3.5
70
mV
65
70
8
–3.5
Full
range
36
1.5
8
–1.69
60
65
1.5
Full
range
25°C
60
UNIT
V
1.2
25°C
IZ = 100 µA,
VZ = 2.5 V
MAX
–1.2
25°C
IZ = 1 mA
TYP
nA
ppm/°C
±50
IZ = 1 mA,
f = 120 Hz,
IAC = 0.1 IZ,
VZ = VREF
25°C
IZ = 1 mA,
f = 120 Hz,
IAC = 0.1 IZ,
VZ = 10 V
25°C
2
2
2
Wideband noise
IZ = 100 µA,
VZ = VREF,
10 Hz ≤ f ≤ 10 kHz
25°C
20
20
20
µVRMS
Long-term
stability of
reverse
breakdown
voltage
t = 1000 h,
TA = 25°C ± 0.1°C,
IZ = 100 µA
25°C
120
120
120
ppm
Thermal
hysteresis (2)
∆TA = –40°C to 125°C
0.3
0.3
0.3
mV/V
Reverse
dynamic
impedance
ZZ
(1)
(2)
Average
temperature
coefficient of
reference
voltage (1)
1.212
Full
range
1 mA < IZ < 12 mA
MIN
Full
range
25°C
IZ,min < IZ < 1 mA
TL4051BI
MAX
25°C
25°C
DVREF
DVKA
TYP
0.3
0.3
0.3
Ω
Reference voltage tolerance and average temperature coefficient change with output voltage (VZ). See Typical Characteristics.
Thermal hysteresis is defined as VZ,25°C (after cycling to –40°C) – VZ,25°C (after cycling to 125°C).
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TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
TL4051xQ (Adjustable Version) Electrical Characteristics
full range TA = –40°C to 125°C (unless otherwise noted)
PARAMETER
VREF
TEST CONDITIONS
Reference
voltage
IZ = 100 µA,
VZ = 5 V
Reference
voltage
tolerance (1)
IZ = 100 µA,
VZ = 5 V
IZ,min
Minimum
cathode current
DVREF
DIZ
Reference
voltage change
with cathode
current change
TL4051AQ
TA
MIN
25°C
Reference
voltage change
with output
voltage change
IFB
Feedback
current
αVREF
eN
VHYST
8
TL4051CQ
MAX
MIN
1.212
TYP
1.212
–2.4
2.4
–6
6
–7.4
7.4
–8.6
8.6
–12.2
12.2
36
36
70
0.3
Full
range
1.1
0.6
6
0.3
Full
range
–2.8
0.6
70
130
1.1
0.3
6
–1.69
–2.8
150
130
0.6
–1.69
6
mV
–2.8
–3.5
70
150
±20
±20
±20
IZ = 1 mA,
VZ = 2.5 V
25°C
±15
±15
±15
25°C
±15
±15
±15
±50
mV/V
130
150
25°C
±50
1.1
8
IZ = 10 mA,
VZ = 2.5 V
Full
range
µA
1.5
–3.5
70
mV
65
75
8
–3.5
Full
range
36
1.5
8
–1.69
60
70
1.5
Full
range
25°C
60
UNIT
V
1.2
25°C
IZ = 100 µA,
VZ = 2.5 V
MAX
–1.2
25°C
IZ = 1 mA
TYP
nA
ppm/°C
±50
IZ = 1 mA,
f = 120 Hz,
IAC = 0.1 IZ,
VZ = VREF
25°C
IZ = 1 mA,
f = 120 Hz,
IAC = 0.1 IZ,
VZ = 10 V
25°C
2
2
2
Wideband noise
IZ = 100 µA,
VZ = VREF,
10 Hz ≤ f ≤ 10 kHz
25°C
20
20
20
µVRMS
Long-term
stability of
reverse
breakdown
voltage
t = 1000 h,
TA = 25°C ± 0.1°C,
IZ = 100 µA
25°C
120
120
120
ppm
Thermal
hysteresis (2)
∆TA = –40°C to 125°C
0.3
0.3
0.3
mV/V
Reverse
dynamic
impedance
ZZ
(1)
(2)
Average
temperature
coefficient of
reference
voltage (1)
1.212
Full
range
1 mA < IZ < 12 mA
MIN
Full
range
25°C
IZ,min < IZ < 1 mA
TL4051BQ
MAX
25°C
25°C
DVREF
DVKA
TYP
0.3
0.3
0.3
Ω
Reference voltage tolerance and average temperature coefficient change with output voltage (VZ). See Typical Characteristics.
Thermal hysteresis is defined as VZ,25°C (after cycling to –40°C) – VZ,25°C (after cycling to 125°C).
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TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
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SLOS487 – JUNE 2007
TYPICAL CHARACTERISTICS
OUTPUT IMPEDANCE
vs
FREQUENCY
TEMPERATURE DRIFT FOR DIFFERENT AVERAGE
TEMPERATURE COEFFICIENTS
0.500
1000
IREF = 100 µA
IREF = 150 µA
0.400
VREF Change – %
0.200
aVREF = 10.4 ppm/°C
100
Impedance – W
0.300
aVREF = 16 ppm/°C
0.100
0.000
-0.100
aVREF = 5.5 ppm/°C
-0.200
VOUT = 10 V
10
VOUT = 5 V
VOUT = 2.5 V
1
-0.300
VOUT = 1.23 V
-0.400
-0.500
-40
-20
0
20
40
60
80
Temperature – °C
100
0.1
100
120
1k
10k
100k
1M
Frequency – Hz
OUTPUT IMPEDANCE
vs
FREQUENCY
NOISE VOLTAGE
vs
FREQUENCY
1000
1000
Voltage Noise – nV/ÖHz
IREF = 1 mA
Impedance – W
100
VOUT = 10 V
10
VOUT = 5 V
1
VOUT = 2.5 V
800
600
400
200
VOUT = 1.23 V
0.1
100
0
1k
10k
100k
1M
1
10
100
1k
10k
100k
Frequency – Hz
Frequency – Hz
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TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
TYPICAL CHARACTERISTICS (continued)
LARGE SIGNAL PULSE RESPONSE
VFB = 8 V
14
12
10
70
8
60
50
Voltage – V
Reverse Current – µA
80
VFB = 6 V
90
VFB = 4 V
VFB = 0 V
100
VFB = 2 V
REVERSE CHARACTERISTICS
40
30
20
6
4
2
10
0
0
0
2
4
6
Output Voltage – V
8
10
-2
-5
5
15
25
35
45
Time – µs
OUTPUT SATURATION
vs
OUTPUT CURRENT
REVERSE CURRENT
vs
REVERSE VOLTAGE
100
1.6
VADJ = VREF + 5 mV
1.4
80
TA = 25°C
Reverse Current – µA
TA = –40°C
Output Saturation – V
1.2
1
TA = 85°C
0.8
TA = 125°C
0.6
60
40
TA = 25°C
20
TA = -40°C
0.4
0
0.0
0.2
0
0
10
TA = 125°C
2
4
6
8
Output Current – mA
10
12
Submit Documentation Feedback
0.4
0.8
1.2
Reverse Voltage – V
1.6
2
TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
TYPICAL CHARACTERISTICS (continued)
REFERENCE VOLTAGE
vs
OUTPUT VOLTAGE
REFERENCE VOLTAGE
vs
TEMPERATURE
1.22
TA = -40°C
1.212
1.208
Reference Voltage – V
TA = 25°C
TA = 85°C
TA = 125°C
1.204
1.2
1.196
0
2
4
6
8
10
1.215
VOUT = VREF
VOUT = 2.5 V
1.21
VOUT = 5 V
VOUT = 10 V
1.205
1.2
1.195
Output Voltage – V
-40
-20
0
20
40
60
80
100
Temperature – °C
FEEDBACK CURRENT
vs
OUTPUT VOLTAGE
120
TA = 125°C
100
Feedback Current – nA
Reference Voltage – V
1.216
TA = 85°C
80
TA = 25°C
60
TA = –40°C
40
20
0
0
2
4
6
Output Voltage – V
Submit Documentation Feedback
8
10
11
TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
APPLICATION INFORMATION
RS = 30 kW
VIN
1-Hz rate
TL4051x12
VZ
Figure 1. Start-Up Characteristics Test Circuit
IR
(+)
TL4051x (Adj)
(-)
2 V/step
V
Figure 2. Reverse Characteristics Test Circuit
Output Capacitor
The TL4051 does not require an output capacitor across CATHODE and ANODE for stability. However, if an
output bypass capacitor is desired, the TL4051 is designed to be stable with all capacitive loads.
SOT-23 Pin Connections
There is a parasitic Schottky diode connected between pins 2 and 3 of the SOT-23 packaged device. Thus,
pin 3 of the SOT-23 package must be left floating or connected to pin 2.
12
Submit Documentation Feedback
TL4051
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS487 – JUNE 2007
APPLICATION INFORMATION (continued)
Adjustable Version
The adjustable version allows VZ to be set by a user-defined resistor divider. The output voltage, VZ, is set
according to the equation shown in Figure 3.
VS
RS
VZ = VREF(1 + R2/R1)
+
VREF
R1
-
TL4051x (Adj)
R2
Figure 3. Adjustable Shunt Regulator
Cathode and Load Currents
In a typical shunt regulator configuration (see Figure 4), an external resistor, RS, is connected between the
supply and the cathode of the TL4051. RS must be set properly, as it sets the total current available to supply
the load (IL) and bias the TL4051 (IZ). In all cases, IZ must stay within a specified range for proper operation of
the reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum IL
and minimum VS), RS must be small enough to supply the minimum IZ required for operation of the regulator, as
given by data sheet parameters. At the other extreme, maximum VS and minimum IL, RS must be large enough
to limit IZ to less than its maximum recommended rating of 12 mA.
RS is calculated as shown in Equation 1.
ǒVS * VZǓ
RS +
(I L ) I Z)
(1)
VS
RS
IZ + IL
IL
VZ
IZ
TL4051x12
Figure 4. Shunt Regulator
Submit Documentation Feedback
13
PACKAGE OPTION ADDENDUM
www.ti.com
13-Jul-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
TL4051A12IDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN8U
Samples
TL4051A12IDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN8U
Samples
TL4051A12QDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TNVU
Samples
TL4051A12QDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TNVU
Samples
TL4051A12QDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
9GU
Samples
TL4051AIDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN2U
Samples
TL4051AIDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN2U
Samples
TL4051AIDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
97U
Samples
TL4051AQDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TN5U
Samples
TL4051AQDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
9AU
Samples
TL4051B12IDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
(TN93, TN9U)
Samples
TL4051B12IDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
(TN93, TN9U)
Samples
TL4051B12QDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
(TNW3, TNWU)
Samples
TL4051B12QDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
9HU
Samples
TL4051BIDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN3U
Samples
TL4051BIDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN3U
Samples
TL4051BIDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
98U
Samples
TL4051BQDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TN6U
Samples
TL4051BQDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
9BU
Samples
TL4051C12IDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TNUU
Samples
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
13-Jul-2022
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
TL4051C12IDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TNUU
Samples
TL4051C12IDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
9FU
Samples
TL4051C12QDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TNYU
Samples
TL4051C12QDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TNYU
Samples
TL4051C12QDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
9JU
Samples
TL4051CIDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN4U
Samples
TL4051CIDBZT
ACTIVE
SOT-23
DBZ
3
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TN4U
Samples
TL4051CIDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
99U
Samples
TL4051CQDBZR
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
TN7U
Samples
TL4051CQDCKR
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
9CU
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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