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TPS723
SLVS346D – SEPTEMBER 2003 – REVISED DECEMBER 2019
TPS723 200-mA, Low-Noise, High-PSRR,
Negative Output Low-Dropout Linear Regulators
1 Features
3 Description
•
•
•
The TPS723 low-dropout (LDO) negative voltage
regulator offers an ideal combination of features to
support low noise applications. This device is capable
of operating with input voltages from –10 V to –2.7 V,
and support outputs from –10 V to –1.2 V. This
regulator is stable with small, low-cost ceramic
capacitors, and include enable (EN) and noise
reduction (NR) functions. Thermal short-circuit and
over-current protections are provided by internal
detection and shutdown logic. High PSRR (65 dB at
1 kHz) and low noise (60 μVRMS) make the TPS723
ideal for low-noise applications.
1
•
•
•
•
•
•
•
Ultralow noise: 60 μVRMS typical
High PSRR: 65 dB typical at 1 kHz
Low dropout voltage: 280 mV typical at 200 mA,
2.5 V
Available in –2.5-V and adjustable (–1.2 V to
–10 V) versions
Stable with a 2.2-μF ceramic output capacitor
Less than 2-μA typical quiescent current in
shutdown mode
2% overall accuracy
(line, load, temperature)
Thermal and over-current protection
Packages:
– SOT23-5 (DBV)
– SOT23-5 (DDC)
– WSON-6 (DRV)
Operating junction temperature range: –40°C to
125°C
The TPS723 uses a precision voltage reference to
achieve 2% overall accuracy over load, line, and
temperature variations. Available in a small SOT23-5
package, the TPS723 is fully specified over a
temperature range of –40°C to 125°C.
Device Information(1)
PART NUMBER
TPS723
2 Applications
•
•
•
•
•
PACKAGE(2)
BODY SIZE (NOM)
SOT-23 (5)
2.90 mm x 1.60 mm
SOT (5)
2.90 mm x 1.60 mm
WSON (6)
2.00 mm x 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) The two SOT23 packages are identical in size, but the SOT
package is thinner.
Optical modules
Semiconductor manufacturing
Medical accessories
Oscilloscopes
Active antenna system mMIMO (AAS)
Typical Application Circuit
2
IN
OUT
5
2.2 µF
2.2 µF
3
EN
NR
4
10 nF
GND
1
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS723
SLVS346D – SEPTEMBER 2003 – REVISED DECEMBER 2019
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
4
6.1
6.2
6.3
6.4
6.5
6.6
4
4
4
4
5
6
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Typical Characteristics ..............................................
Detailed Description ............................................ 11
7.1
7.2
7.3
7.4
Overview .................................................................
Functional Block Diagrams .....................................
Feature Description.................................................
Device Functional Modes........................................
11
11
12
12
8
Application and Implementation ........................ 13
8.1 Application Information............................................ 13
8.2 Typical Application .................................................. 13
8.3 What to Do and What Not to Do ............................. 14
9 Power Supply Recommendations...................... 15
10 Layout................................................................... 15
10.1 Layout Guidelines ................................................. 15
10.2 Layout Example .................................................... 15
11 Device and Documentation Support ................. 16
11.1
11.2
11.3
11.4
11.5
11.6
Device Support......................................................
Receiving Notification of Documentation Updates
Support Resources ...............................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
16
16
16
16
16
16
12 Mechanical, Packaging, and Orderable
Information ........................................................... 16
4 Revision History
Changes from Revision C (September 2014) to Revision D
Page
•
Added DRV package to document ........................................................................................................................................ 1
•
Changed Applications section to link to end equipment ........................................................................................................ 1
Changes from Revision B (July 2007) to Revision C
Page
•
Changed format to meet latest data sheet standards; added new sections, and moved existing sections .......................... 1
•
Added bullet item for DDC package to Features list ............................................................................................................. 1
•
Revised Device Information table to include SOT-5 package ................................................................................................ 1
•
Updated Typical Application Circuit to show SOT-5 (DDC) package pin configuration ......................................................... 1
•
Added pin configuration drawings ......................................................................................................................................... 3
•
Deleted Dissipation Ratings table; see Thermal Information ................................................................................................ 4
•
Changed y-axis title in Figure 11 to Feedback Current from Supply Current ....................................................................... 6
•
Reworded second paragraph in Current Limit subsection. .................................................................................................. 12
Changes from Revision A (June 2007) to Revision B
Page
•
Added second paragraph in Current Limit subsection ........................................................................................................ 12
•
Changed equation shown in Figure 27 ................................................................................................................................ 13
Changes from Original (September 2003) to Revision A
Page
•
Changed document format to correspond to current product line standards ......................................................................... 1
•
Removed Output Voltage vs Output Current graph (original Fig 2) ...................................................................................... 6
2
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SLVS346D – SEPTEMBER 2003 – REVISED DECEMBER 2019
5 Pin Configuration and Functions
DBV Package
5-Pin SOT23
Top View
GND
1
IN
2
EN
3
5
DRV Package
6-Pin WSON
Top View
OUT
4
1
IN
2
EN
3
1
FB,NR
2
N/C
3
NR/FB
6
IN
5
GND
4
EN
Thermal
DDC Package
5-Pin SOT23
Top View
GND
OUT
Pad
Not to scale
5
OUT
4
NR/FB
Pin Functions
PIN
NO.
I/O
DESCRIPTION
NAME
DBV,
DDC
DRV
GND
1
5
—
IN
2
6
I
Input supply
EN
3
4
I
Bipolar enable pin. Driving this pin above the positive enable threshold or below the negative
enable threshold turns on the regulator. Driving this pin below the positive disable threshold
and above the negative disable threshold puts the regulator into shutdown mode.
NR
4
2
—
Fixed voltage versions only. Connecting an external capacitor between this pin and ground,
bypasses noise generated by the internal band gap. This configuration allows output noise to
be reduced to very low levels.
FB
4
2
I
Adjustable voltage version only. This pin is the input to the control loop error amplifier. This
pin is used to set the output voltage of the device.
OUT
5
1
O
Regulated output voltage. A small, 2.2-μF ceramic capacitor is needed from this pin to GND
to ensure stability.
N/C
—
3
Ground
No internal connection
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SLVS346D – SEPTEMBER 2003 – REVISED DECEMBER 2019
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6 Specifications
6.1 Absolute Maximum Ratings
over operating junction temperature range (unless otherwise noted) (1) (2)
Voltage
Current
MIN
MAX
IN
–11
+0.3
NR
–11
+5.5
EN
–VI
+5.5
OUT
–11
+0.3
OUT
UNIT
V
Internally limited
Output short-circuit duration
A
Indefinite
See Thermal Information
table
Continuous total power dissipation
Operating junction temperature, TJ
–65
150
°C
Storage temperature, Tstg
–65
150
°C
(1)
(2)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltage values are with respect to network ground terminal.
6.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1)
±1000
Charged-device model (CDM), per JEDEC specification JESD22C101 (2)
±500
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
over operating junction temperature range (unless otherwise noted)
MIN
VI
Input supply voltage range
IO
Output current
TJ
Operating junction temperature
MAX
UNIT
–10
NOM
–2.7
V
0
200
mA
–40
125
°C
6.4 Thermal Information
TPS723
THERMAL METRIC (1)
DBV (SOT23)
DDC (SOT23)
DRV (WSON)
5 PINS
5 PINS
6 PINS
UNIT
RθJA
Junction-to-ambient thermal resistance
206.9
194.8
85.6
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
120.5
41.4
83.7
°C/W
RθJB
Junction-to-board thermal resistance
35.9
35.9
47.3
°C/W
ψJT
Junction-to-top characterization parameter
13.3
1.0
3.7
°C/W
ψJB
Junction-to-board characterization parameter
35.0
35.7
47.3
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
N/A
N/A
31.6
°C/W
(1)
4
For more information about traditional and new thermal metrics, see the Semiconductor and IC package thermal metrics application
report.
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SLVS346D – SEPTEMBER 2003 – REVISED DECEMBER 2019
6.5 Electrical Characteristics
Over operating junction temperature range, VI = VO(NOM) – 0.5 V, IO = 1 mA, VEN = 1.5 V, CO = 2.2 μF, and CNR = 0.01 μF,
unless otherwise noted. Typical values are at TJ = 25°C.
PARAMETER
TEST CONDITIONS
VI
Input voltage range (1)
VFB
Feedback reference voltage
TPS72301
Output voltage range
TPS72301
Accuracy
TJ = 25°C
TJ = 25°C
TPS72325 vs
VI/IO/T
TPS72301 vs
VI/IO/T
–10 V ≤ VI ≤ VO – 0.5 V,
10 μA ≤ IO ≤ 200 mA
ΔVO(ΔVI)
Line regulation
–10 V ≤ VI ≤ VO(NOM) – 0.5 V
ΔVO(ΔIO)
Load regulation
0 mA ≤ IO ≤ 200 mA
VDO
Dropout voltage at
VO = 0.96 × VO(NOM)
I(LIM)
Current limit
I(GND)
TYP
–10
Nominal
VO
MIN
TPS72325
–1.186
UNIT
–2.7
V
–1.162
V
–10 + VDO
VFB
V
–1%
1%
–2%
±1%
2%
–3%
±1
3%
IO = 200 mA
VO = 0.85 × VO(NOM)
Ground pin current
–1.210
MAX
300
0.04
%/V
0.002
%/mA
280
500
mV
mA
550
800
IO = 0 mA (IQ),
–10 V ≤ VI ≤ VO – 0.5 V
130
200
IO = 200 mA,
–10 V ≤ VI ≤ VO – 0.5 V
350
500
μA
I(SHDN)
Shutdown ground pin current
–0.4 V ≤ VEN ≤ 0.4 V,
–10 V ≤ VI ≤ VO – 0.5 V
0.1
2.0
μA
I(FB)
Feedback pin current
–10 V ≤ VI ≤ VO – 0.5 V
0.05
1.0
μA
PSRR
Power-supply rejection ratio
Vn
Output noise voltage
tSTR
Startup time
VEN(HI)
Enable threshold positive
VEN(LO)
Enable threshold negative
VDIS(HI)
Disable threshold positive
VDIS(LO)
Disable threshold negative
TPS72325
TPS72325
I(EN)
Enable pin current
Tsd
Thermal shutdown temperature
TJ
Operating junction temperature
(1)
IO = 200 mA, 1 kHz,
CI = CO = 10 μF
65
IO = 200 mA, 10 kHz,
CI = CO = 10 μF
48
CO = 10 μF, 10 Hz to 100 kHz,
IO = 200 mA
60
μVRMS
1
ms
dB
VO = –2.5 V, CO = 1 μF,
RL = 25 Ω
1.5
V
–1.5
V
0.4
V
–0.4
V
–10 V ≤ VI ≤ VO – 0.5 V,
–10 V ≤ VEN ≤ ±3.5 V
0.1
Shutdown, temperature increasing
165
Reset, temperature decreasing
145
–40
2.0
μA
°C
125
°C
Maximum VI = (VO – VDO) or – 2.7 V, whichever is more negative.
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6.6 Typical Characteristics
TPS72325 at VI = VO(NOM) – 0.5 V, IO = 1 mA, VEN = 1.5 V, CO = 2.2 μF, and CNR = 0.01 μF, unless otherwise noted.
-2.475
-2.488
TJ = +25°C
TJ = -40°C
-2.500
TJ = +85°C
-2.513
TJ = +125°C
-2.525
-10
VIN = 3V, IOUT = 200mA
Output Voltage, VOUT (V)
Output Voltage (V)
-2.475
-2.488
VIN = 10V, IOUT = 200mA
-2.500
VIN = 10V, IOUT = 0mA
-2.513
VIN = 3V, IOUT = 0mA
-2.525
-9
-8
-7
-6
-5
-4
-3
-2
-40
0
-20
Input Voltage (V)
Figure 1. Output Voltage vs Input Voltage
80
100
120
140
300
TJ = +125°C
Dropout Voltage (mV)
Dropout Voltage (mV)
60
350
300
250
TJ = +25°C
200
150
TJ = -40°C
100
50
TJ = +125°C
250
TJ = +25°C
200
150
TJ = -40°C
100
50
0
0
-10
-9
-8
-7
-6
-5
-4
-3
0
-2
25
50
Input Voltage (V)
75
100
125
150
175
200
Output Current (mA)
Figure 3. TPS72301 Dropout Voltage vs Input Voltage
Figure 4. Dropout Voltage vs Output Current
500
350
450
300
400
Ground Current (mA)
Dropout Voltage (mV)
40
Figure 2. Output Voltage vs Ambient Temperature
350
250
200
150
100
RL = 12.5W
350
300
250
200
150
No Load
100
50
50
0
0
-40
6
20
Ambient Temperature (°C)
-20
0
20
40
60
80
100
120
140
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
Junction Temperature (°C)
Input Voltage (V)
Figure 5. TPS72325 Dropout Voltage vs Junction
Temperature
Figure 6. Ground Current vs Input Voltage
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Typical Characteristics (continued)
TPS72325 at VI = VO(NOM) – 0.5 V, IO = 1 mA, VEN = 1.5 V, CO = 2.2 μF, and CNR = 0.01 μF, unless otherwise noted.
400
500
450
350
400
300
250
Ground Current (mA)
Ground Current (mA)
TJ = +25°C
TJ = +125°C
200
TJ = -40°C
150
100
VIN = 10V, IOUT = 200mA
350
300
250
200
VIN = 3V, IOUT = 0mA
150
100
50
VIN = 10V, IOUT = 0mA
50
0
0
0
50
100
150
200
-40
0
-20
20
40
60
80
100
120
140
Output Current (mA)
Junction Temperature (°C)
Figure 7. Ground Current vs Output Current
Figure 8. Ground Current vs Junction Temperature
800
250
750
200
Standby Current (nA)
Current Limit (mA)
700
650
600
550
500
450
400
VIN = -10V
150
VIN = -3V
100
50
350
300
0
-40
-20
0
20
40
60
80
100
120
140
-40
-20
0
20
40
60
80
100
120
140
Junction Temperature (°C)
Junction Temperature (°C)
Figure 9. TPS72325 Current Limit vs Junction Temperature
Figure 10. Standby Current vs Junction Temperature
200
1000
800
VOUT = -2.5V
-200
Enable Pin Current (nA)
Feedback Current (nA)
0
-400
-600
-800
-1000
VOUT = -1.2V
-1200
-1400
600
400
200
-200
-600
-1800
-800
-40
-20
0
20
40
60
80
100
120
140
VIN = -10V, VEN = 3.5V
-400
-1600
-2000
VIN = -10V, VEN = -0.5V
0
VIN = -10V, VEN = -10V
-1000
-40
Junction Temperature (°C)
-20
0
20
40
60
80
100
120
140
Ambient Temperature (°C)
Figure 11. TPS72301 Feedback Pin Current vs Junction
Temperature
Figure 12. Enable Pin Current vs Junction Temperature
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Typical Characteristics (continued)
TPS72325 at VI = VO(NOM) – 0.5 V, IO = 1 mA, VEN = 1.5 V, CO = 2.2 μF, and CNR = 0.01 μF, unless otherwise noted.
-2
Minimum Required Input Voltage (V)
Line Regulation (%/V)
Load Regulation (%/mA)
0.25
0.13
Load
0
Line
-0.13
-0.25
-3
TJ = -40°C
-4
-5
-6
TJ = +125°C
-7
-8
-9
-10
-40
0
-20
20
40
60
80
100
120
140
-10
-9
-8
50
0
-50
0
-3.0
CIN = 2.2mF
COUT = 2.2mF
CNR = 0mF
-4.5
0
20
40
60
80
100 120
140 160
-2
CIN = 2.2mF
COUT = 2.2mF
CNR = 0mF
-200
0
20
40
60
80
100 120
140 160
180 200
Time (ms)
Figure 16. TPS72325 Load Transient Response
Output Voltage (mV)
100
0
0
-100
CIN = 2.2mF
COUT = 2.2mF
CNR = 0mF
-200
0
20
40
60
80
100 120
140 160
180 200
Input Voltage (V)
Current Load (mA)
-3
0
-100
180 200
Figure 15. TPS72325 Line Transient Response
DVOUT, Change In
Output Voltage (mV)
-4
0
Time (ms)
CIN = 2.2mF
COUT = 2.2mF
IOUT = 50mA
CNR = 0mF
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Time (ms)
Time (ms)
Figure 17. TPS72325 Load Transient Response
8
-5
100
DVOUT, Change In
Output Voltage (mV)
100
-4.0
-6
Figure 14. TPS72301 Minimum Required Input Voltage vs
Output Voltage
Current Load (mA)
Input Voltage (V) Output Voltage (mV)
Figure 13. Line And Load Regulation vs Junction
Temperature
-3.5
-7
Output Voltage (V)
Junction Temperature (°C)
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Figure 18. TPS72325 Start-Up Response
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Typical Characteristics (continued)
0.5
0
0
1
-0.5
2
Voltage (V)
Input Voltage (V)
Output Voltage (mV)
TPS72325 at VI = VO(NOM) – 0.5 V, IO = 1 mA, VEN = 1.5 V, CO = 2.2 μF, and CNR = 0.01 μF, unless otherwise noted.
0
1
CIN = 2.2mF
COUT = 2.2mF
IOUT = 50mA
CNR = 0.01mF
2
3
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
VOUT
VIN
-1.0
-1.5
-2.0
CIN = 2.2mF
COUT = 2.2mF
IOUT = 50mA
CNR = 0mF
-2.5
-3.0
-3.5
1.0
0
1
2
3
4
Time (ms)
Figure 19. TPS72325 Start-Up Response
Total Noise (mVRMS)
COUT = 10mF, IOUT = 100mA
150
COUT = 2.2mF, IOUT = 25mA
100
50
COUT = 10mF, IOUT = 25mA
10
100
9
10
CIN = -2.2mF, COUT = 2.2mF
IOUT = 100mA, CNR = 0.01mF
1k
10k
100k
Time (1ms/div)
CNR (pF)
Figure 22. TPS72325 Output Noise vs Time
Figure 21. TPS72325 Total Noise vs CNR (10 Hz to 100 kHz)
10m
Noise Spectral Density (VRMS/ÖHz)
10m
Noise Spectral Density (VRMS/ÖHz)
8
Figure 20. TPS72325 Power-Up/Power-Down
0
1
7
CIN = 2.2mF
COUT = 2.2mF, IOUT = 100mA
200
6
Output Noise (100mV/div)
250
5
Time (ms)
IOUT = 25mA
1m
IOUT = 100mA
100n
CIN = 0.01mF
COUT = 2.2mF
CNR = 0.01mF
10n
IOUT = 100mA
1m
IOUT = 25mA
100n
CIN = 0mF
COUT = 2.2mF
CNR = 0.01mF
10n
100
1k
10k
100k
100
Frequency (Hz)
1k
10k
100k
Frequency (Hz)
Figure 23. TPS72325 Noise Spectral Density vs Frequency
Figure 24. TPS72325 Noise Spectral Density vs Frequency
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Typical Characteristics (continued)
TPS72325 at VI = VO(NOM) – 0.5 V, IO = 1 mA, VEN = 1.5 V, CO = 2.2 μF, and CNR = 0.01 μF, unless otherwise noted.
90
80
70
IOUT = 100mA
60
IOUT = 1mA
50
40
30
20
10
0
VIN = -5V
CIN = 10mF
COUT = 10mF
CNR = 0mF
IOUT = 200mA
-10
80
70
IOUT = 100mA
60
IOUT = 1mA
50
40
30
20
10
0
VIN = -5V
CIN = 10mF
COUT = 10mF
CNR = 0.01mF
IOUT = 200mA
-10
10
10
Power-Supply Rejection Ratio (dB)
Power-Supply Rejection Ratio (dB)
90
100
1k
10k
100k
1M
10M
10
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
Figure 25. PSRR vs Frequency
Figure 26. PSRR vs Frequency
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7 Detailed Description
7.1 Overview
The TPS723 is a low-dropout, negative linear voltage regulator with a rated current of 200 mA. It is offered in
trimmed output voltages between –1.5 V and –5.2 V and as an adjustable regulator from –1.2 V to –10 V. The
device features very low noise and high power-supply rejection ratio (PSRR), making the TPS723 ideal for highsensitivity analog and RF applications. A shutdown mode is available, reducing ground current to 2-μA maximum
over temperature and process.
7.2 Functional Block Diagrams
TPS72301
IN
OUT
EN
100kW
VREF
1.186V
Current Limit
/Thermal
Protection
5pF
R1
FB
GND
R2
R1 + R2 @ 100kW
TPS72325
IN
OUT
EN
100kW
VREF
1.186V
5pF
Current Limit
/Thermal
Protection
R1
GND
R2
R1 + R2 = 97kW
NR
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7.3 Feature Description
7.3.1 Current Limit
The TPS723 has internal circuitry that monitors and limits output current to protect the regulator from damage
under all load conditions. When output current reaches the output current limit (550 mA typical), protection
circuitry turns on, reducing output voltage to ensure that current does not increase. See Figure 9 in the Typical
Characteristics section.
Do not drive the output more than 0.3 V above the input. An output voltage more than 0.3 V above the input
voltage biases the body diode in the pass FET, and allows current to flow from the output to the input. This
current is not limited by the device. If this condition is expected, make sure to externally limit the reverse current.
7.3.2 Enable
The enable pin is active above +1.5 V and below –1.5 V, allowing it to be controlled by a standard TTL signal or
by connection to VI if not used. When driven to GND most internal circuitry is turned off, putting the TPS723 into
shutdown mode, drawing 2-μA maximum ground current.
7.4 Device Functional Modes
Driving EN over 1.5 V or below –1.5 V turns on the regulator. Driving EN between –1.5 V and +1.5 V puts the
regulator into shutdown mode, thus reducing the operating current to 100 nA, nominal.
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8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The TPS723 LDO regulator provides high PSRR and low noise. These features make the device a good fit for
high-sensitivity analog and RF applications.
8.2 Typical Application
The TPS72301 allows designers to specify any output voltage from –10 V to –1.2 V. As shown in the application
circuit in Figure 27, an external resistor divider is used to scale the output voltage (VO) to the reference voltage.
For best accuracy, use precision resistors for R1 and R2. Use the equations in Figure 27 to determine the values
for the resistor divider.
VOUT = –1.186 1 +
R1
R2
R1+R2 ≈ 100kΩ
2
5
IN
OUT
R1
4
3
FB
EN
GND
R2
1
Figure 27. TPS72301 Adjustable LDO Regulator Programming
8.2.1 Design Requirements
8.2.1.1 Capacitor Selection for Stability
Appropriate input and output capacitors should be used for the intended application. The TPS723 only requires a
2.2-μF ceramic output capacitor to be used for stable operation. Both the capacitor value and equivalent series
resistance (ESR) affect stability, output noise, PSRR, and transient response. For typical applications, a 2.2-μF
ceramic output capacitor located close to the regulator is sufficient.
8.2.1.2 Output Noise
Without external bypassing, output noise of the TPS723 from 10 Hz to 100 kHz is 200 μVRMS typical. The
dominant contributor to output noise is the internal bandgap reference. Adding an external 0.01-μF capacitor to
ground reduces noise to 60 μVRMS. Best noise performance is achieved using appropriate low ESR capacitors for
bypassing noise at the NR and OUT pins. See Figure 21 in the Typical Characteristics section.
8.2.1.3 Power-Supply Rejection
The TPS723 offers a very high PSRR for applications with noisy input sources or highly sensitive output supply
lines. For best PSRR, use high-quality input and output capacitors.
8.2.2 Detailed Design Procedure
Select the desired device based on the output voltage.
Provide an input supply with adequate headroom to account for dropout and output current to account for the
GND terminal current, and power the load.
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Typical Application (continued)
8.2.3 Application Curves
0.5
Voltage (V)
-0.5
Output Noise (100mV/div)
VOUT
0
VIN
-1.0
-1.5
-2.0
CIN = 2.2mF
COUT = 2.2mF
IOUT = 50mA
CNR = 0mF
-2.5
-3.0
CIN = -2.2mF, COUT = 2.2mF
IOUT = 100mA, CNR = 0.01mF
-3.5
0
1
2
3
4
5
6
7
8
9
Time (1ms/div)
10
Time (ms)
Figure 29. TPS72325 Output Noise vs Time
Figure 28. TPS72325 Power-Up/Power-Down
Power-Supply Rejection Ratio (dB)
90
80
70
IOUT = 100mA
60
IOUT = 1mA
50
40
30
20
10
0
VIN = -5V
CIN = 10mF
COUT = 10mF
CNR = 0.01mF
IOUT = 200mA
-10
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
Figure 30. PSRR vs Frequency
8.3 What to Do and What Not to Do
Do place at least one 2.2-µF ceramic capacitor as close as possible to the OUT terminal of the regulator.
Do not place the output capacitor more than 10 mm away from the regulator.
Do connect a 0.1-μF to 2.2-μF low ESR capacitor across the IN terminal and GND input of the regulator.
Do not exceed the absolute maximum ratings.
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9 Power Supply Recommendations
These devices are designed to operate from an input voltage supply range between –10 V and –2.7 V. The input
voltage range must provide adequate headroom in order for the device to have a regulated output. This input
supply must be well-regulated and stable. If the input supply is noisy, additional input capacitors with low ESR
can help improve the output noise performance.
10 Layout
10.1 Layout Guidelines
To improve ac performance (such as PSRR, output noise, and transient response), design the board with
separate ground planes for VI and VO, with each ground plane connected only at the GND pin of the device. In
addition, connect the bypass capacitor directly to the GND pin of the device.
10.1.1 Power Dissipation
The ability to remove heat from the die is different for each package type, presenting different considerations in
the printed circuit board (PCB) layout. The PCB area around the device that is free of other components moves
the head from the device to the ambient air. Performance data for JEDEC low- and high-K boards are given in
the Thermal Information table near the front of this data sheet. Using heavier copper increases the effectiveness
in removing heat from the device. The addition of plated through-holes to heat-dissipating layers also improves
heatsink effectiveness. Power dissipation depends on input voltage and load conditions. Power dissipation is
equal to the product of the output current times the voltage drop across the output pass element, as shown in
Equation 1:
P D + ǒVIN*V OUTǓ @ I OUT
(1)
10.1.2 Thermal Protection
As protection from damage due to excessive junction temperatures, the TPS723 has internal protection circuitry.
When junction temperature reaches approximately 165°C, the output device is turned off. After the device has
cooled to 145°C, the output device is enabled, allowing normal operation. For reliable operation, design is for
worst-case junction temperature of ≤ 125°C taking into account worst-case ambient temperature and load
conditions.
10.2 Layout Example
CO
Ground
Plane
VO
TPS723
VI
EN
R1
R2
CI
Ground
Plane
Figure 31. Example Layout
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11 Device and Documentation Support
11.1 Device Support
11.1.1 Development Support
11.1.1.1 Spice Models
Computer simulation of circuit performance using SPICE is often useful when analyzing the performance of
analog circuits and systems. A SPICE model for the TPS723xx is available through the product folders under
Simulation Models.
11.1.2 Device Nomenclature
Table 1. Device Nomenclature (1)
PRODUCT
TPS723xx yyy z
(1)
VOUT
XX is nominal output voltage (for example, 25 = 2.5 V, 01 = Adjustable).
YYY is package designator.
Z is package quantity.
For the most current package and ordering information see the Package Option Addendum at the end of this document, or visit the
device product folder at www.ti.com.
11.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
11.3 Support Resources
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight
from the experts. Search existing answers or ask your own question to get the quick design help you need.
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do
not necessarily reflect TI's views; see TI's Terms of Use.
11.4 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
11.5 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
11.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
12 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
16
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PACKAGE OPTION ADDENDUM
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6-Feb-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
TPS72301DBVR
ACTIVE
SOT-23
DBV
5
3000
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T08I
TPS72301DBVRG4
ACTIVE
SOT-23
DBV
5
3000
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T08I
TPS72301DBVT
ACTIVE
SOT-23
DBV
5
250
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T08I
TPS72301DBVTG4
ACTIVE
SOT-23
DBV
5
250
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T08I
TPS72301DDCR
ACTIVE
SOT-23-THIN
DDC
5
3000
Green (RoHS
& no Sb/Br)
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
T08I
TPS72301DDCT
ACTIVE
SOT-23-THIN
DDC
5
250
Green (RoHS
& no Sb/Br)
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
T08I
TPS72301DRVR
ACTIVE
WSON
DRV
6
3000
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
1TLM
TPS72301DRVT
ACTIVE
WSON
DRV
6
250
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
1TLM
TPS72325DBVR
ACTIVE
SOT-23
DBV
5
3000
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T02I
TPS72325DBVRG4
ACTIVE
SOT-23
DBV
5
3000
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T02I
TPS72325DBVT
ACTIVE
SOT-23
DBV
5
250
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T02I
TPS72325DBVTG4
ACTIVE
SOT-23
DBV
5
250
Green (RoHS
& no Sb/Br)
NIPDAU
Level-1-260C-UNLIM
-40 to 125
T02I
(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.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
6-Feb-2020
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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