TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
ULTRA LOW-POWER, 10 mA, LDO LINEAR REGULATORS WITH POWER GOOD OUTPUT
FEATURES
APPLICATIONS
•
•
1
•
•
•
•
•
•
•
•
•
•
•
(1)
Controlled Baseline
– One Assembly Site
– One Test Site
– One Fabrication Site
Extended Temperature Performance of
–55°C to 125°C
Enhanced Diminishing Manufacturing Sources
(DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree(1)
10 mA Low-Dropout Regulator
Ultralow 1.2 µA Quiescent Current at 10 mA
5-Pin SC70/SOT-323 (DCK) Package
Integrated Power Good Output
Stable With Any Capacitor (> 0.47 µF)
Dropout Voltage Typically 105 mV at 10 mA
(TPS79733)
Overcurrent Limitation
Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
Battery-Powered Microcontrollers and
Microprocessors
DESCRIPTION/ORDERING INFORMATION
The TPS797xx family of low-dropout (LDO) voltage
regulators offers the benefits of low-dropout voltage
and ultralow-power operation. The device is stable
with any capacitor (> 0.47 µF). Therefore,
implementations of this device require little board
space due to the miniaturized packaging and
potentially small output capacitor. In addition, the
family includes an integrated open drain active-high
power good (PG) output. Intended for use in
microcontroller based, battery-powered applications,
the
TPS797xx
family's
low
dropout
and
ultralow-powered operation results in a significant
increase in system battery operating life. The small
packaging minimizes consumption of board space.
The device is enabled when the applied voltage
exceeds the minimum input voltage. The usual PNP
pass transistor has been replaced by a PMOS pass
element. Because the PMOS pass element behaves
as a low-value resistor, the dropout voltage is low,
125 mV (typ) at 10 mA of load current and is directly
proportional to the load current. The quiescent current
is ultralow (1.2 µA typ) and is stable over the entire
range of output load current (0 mA to 10 mA). When
properly configured with a pullup resistor, the PG
output can be used to implement a power-on reset or
low battery indicator. The TPS797xx is offered in
1.8 V, 3 V, and 3.3 V fixed options.
ORDERING INFORMATION (1)
TA
PACKAGE (2)
VOLTAGE
1.8 V
–55°C to 125°C
3V
SC70/SOT-323 (DCK)
3.3 V
(1)
(2)
(3)
PART NUMBER
SYMBOL
TPS79718MDCKREP
CKW
TPS79730MDCKREP
BUA
TPS79733MDCKREP (3)
TBD
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
Product Preview. Parameters in electrical characteristics are subject to change.
1
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.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2007, Texas Instruments Incorporated
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
DCK PACKAGE
(TOP VIEW)
1
GND
2
NC
3
5
OUT
2
VI = 4.3 V
VO = 3.3 V
Co = 1 µF
IO = 10 mA
1.75
4
Ground Current − µ A
PG
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
IN
1.50
1.25
1
0.75
0.50
−40
−15
10
35
60
TA − Free-Air Temperature − °C
85
DEVICE INFORMATION
FUNCTIONAL BLOCK DIAGRAM
VOUT
VIN
Current
Sense
ILIM
_
R1
+
GND
R2
Vref = 1.235 V
Bandgap
Reference
VIN
PG
Delay
TERMINAL FUNCTIONS
TERMINAL
NAME
NO.
IN
4
GND
2
NC
3
OUT
5
PG
2
1
I/O
I
DESCRIPTION
The IN terminal is the power supply input to the device.
Ground
No connection
O
The OUT terminal provides the regulated output voltage of the device.
O
The PG terminal for the fixed voltage option devices is an open-drain active-high output that indicates
the status of VO (output of the LDO). When VO exceeds approximately 90% of the regulated voltage,
PG goes to a high impedance state. It goes to a low-impedance state when VO falls below
approximately 90% (i.e. overload condition) of the regulated voltage. The open drain output of the PG
terminal requires a pullup resistor.
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Copyright © 2006–2007, Texas Instruments Incorporated
Product Folder Link(s): TPS79718-EP TPS79730-EP TPS79733-EP
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
ABSOLUTE MAXIMUM RATINGS (1)
over operating free-air temperature range (unless otherwise noted)
Input voltage range (2)
Maximum dc output voltage
Peak output current
VALUE
UNIT
0.3 to 6
V
4.9
V
Internally limited
ESD rating, HBM
3
kV
ESD rating, CDM
1
kV
Continuous total power dissipation
See Dissipation Rating Table
TJ
Operating junction temperature range
–55 to 145
°C
TA
Operating ambient temperature range
–55 to 125
°C
Tstg
Storage temperature range
–65 to 150
°C
(1)
(2)
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.
All voltage values are with respect to network ground terminal.
DISSIPATION RATINGS
BOARD
PACKAGE
RθJC
(°C/W)
RθJA
(°C/W)
DERATING
FACTOR
ABOVE
TA = 25°C
TA ≥ 25°C
POWER
RATING
TA = 70°C
POWER
RATING
TA = 85°C
POWER
RATING
Low K
DCK
165.39
396.24
2.52 mW/°C
252 mW
139 mW
101 mW
0W
High K
DCK
165.39
314.74
3.18 mW/°C
318 mW
175 mW
127 mW
127 mW
Copyright © 2006–2007, Texas Instruments Incorporated
TA = 125°C
POWER
RATING
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3
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
VI
TEST CONDITIONS
MIN
IO = 3 mA
Input voltage (1)
Continuous output current
Operating ambient temperature
V
5.5
V
0
10
mA
–55
125
°C
1.895
V
3.12
V
3.432
V
TA = 25°C, 2.8 V < VI < 5.5 V
TPS79718
1.8
TJ = –55°C to 125°C,
2.8 V < VI < 5.5 V
1.705
TA = 25°C, 4 V < VI < 5.5 V
Output voltage
(1mA to 10mA load) (3)
TPS79730
3
TJ = –55°C to 125°C,
4 V < VI < 5.5 V
2.88
TA = 25°C, 4.3 V < VI < 5.5 V
TPS79733
Quiescent current (GND current) (3)
Load regulation
4
1.2
TJ = –55°C to 125°C, IO = 10 mA
5
17
VO + 1 V < VI ≤ 5.5 V, TA = 25°C
VO = 0 V, See Note 4
190
Power supply ripple rejection (TPS79718)
f = 100 Hz, CO = 10 mF, IO = 10 mA,
TA = 25°C
105
IO = 10 mA, TA = –55°C to 125°C
VO decreasing
VI = 1.4 V, I(PG) = 100 uA
PG leakage current
V(PG) = 5 V
mA
dB
400
IO = 10 mA, TA = 25°C
PG output low voltage
300
125
IO = 10 mA, TA = –55°C to 125°C
PG trip threshold voltage
%/V
µVRMS
50
IO = 10 mA, TA = 25°C
I(PG) = 100 uA, V(PG) ≥ 0.8 V
mV
0.8
Output current limit
Minimum input voltage for valid PG
µA
0.15
VO + 1 V < VI ≤ 5.5 V,
TJ = –55°C to 125°C
600
TPS79733
(4)
TA = 25°C, 0 mA < IO < 10 mA
BW = 200 Hz to 100 kHz,
CO = 10 mF,
IO = 10 mA, TA = 25°C
Dropout voltage (4)
(3)
3.168
Output noise voltage (TPS79718)
TPS79730
(1)
(2)
3.3
TJ = –55°C to 125°C,
4.3 V < VI < 5.5 V
TA = 25°C, IO = 1 mA to 10 mA
Output voltage line regulation
(ΔVout/ΔVin) (3)
UNIT
2
(2)
TA
MAX
5.5
IO = 10 mA
IO
TYP
1.8
mV
400
1.2
V
90
0.14
0.1
%VO
0.4
V
nA
To calculate the minimum input voltage for your maximum output current, use the following formula: VI(min) = VO(max) + VDO (max load)
Continuous output current is limited by internal protection circuitry, but it is not recommended that the device operate under conditions
beyond those specified in this table for extended periods of time.
The minimum IN operating voltage is 1.8 V or VO (typ) + 1 V, whichever is greater. The maximum IN voltage is 5.5 V. There is no
minimum output current requirement and the maximum output current is 10 mA.
IN voltage equals VO(typ) – 100 mV; The TPS79730 input voltage is set to 2.9 V and the TPS79733 input voltage is set to 3.2 V. The
TPS79718 dropout voltage is limited by input voltage range limitations.
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Copyright © 2006–2007, Texas Instruments Incorporated
Product Folder Link(s): TPS79718-EP TPS79730-EP TPS79733-EP
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
TPS797xx PG TIMING DIAGRAM
VIN
Vmin
(see Note A)
t
VOUT
Threshold
Voltage
VIT +
(see Note B)
VIT −
(see Note B)
t
PG
Output
t
A.
Vmin = VOUT + VDO
B.
The PG trip voltage is typically 10% lower than the output voltage (90%VO). VIT- to VIT+ is the hysteresis voltage.
Copyright © 2006–2007, Texas Instruments Incorporated
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5
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.315
1.815
VI = 4.3 V
Co = 1 µF
TA = 25°C
3.35
VI = 2.8 V
Co = 1 µF
TA = 25°C
3.305
3.300
3.295
3.33
1.805
1.800
1.795
3.290
1.790
3.285
1.785
VI = 4.3 V
Co = 1 µF
3.34
V O − Output Voltage − V
1.810
V O − Output Voltage − V
3.310
V O − Output Voltage − V
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
3.32
3.31
IO = 1 mA
3.30
3.29
IO = 10 mA
3.28
3.27
3.26
0
2
4
6
8
IO − Output Current − mA
2
4
6
8
IO − Output Current − mA
10
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
Ground Current − µ A
IO = 1 mA
IO = 10 mA
1.79
VI = 4.3 V
VO = 3.3 V
Co = 1 µF
IO = 10 mA
1.50
1.25
1
0.75
−15
10
35
60
TA − Free-Air Temperature − °C
0.50
−40
85
IO = 10 mA
6
IO = 1 mA
4
2
0
−15
10
35
60
TA − Free-Air Temperature − °C
85
100
1k
10 k
f − Frequency − Hz
Figure 6.
OUTPUT IMPEDANCE
vs
FREQUENCY
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
vs
POWER UP / POWER DOWN
IO = 1 mA
25
20
IO = 10 mA
15
10
VI = 3.2 V
Co = 1 µF
100
IO = 10 mA
80
60
40
IO = 1 mA
20
5
0
100
1k
10k
100k
1M
10 M
f − Frequency − Hz
0
−40 −25
−10
VO = 3.3 V
RL = 330 Ω
6
VO − Output Voltage − V
V − Input Voltage − V
I
120
5
20
35
5
VI
4
3
VO
2
1
0
50
65
80
0
TA − Free-Air Temperature − °C
Figure 7.
10 20
30 40 50
60 70 80 90 100
t − Time − ms
Figure 8.
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100 k
7
140
V DO − Dropout Voltage − mV
Zo − Output Impedance − Ω
8
Figure 5.
VI = 4.3 V
VO = 3.3 V
Co = 1 µF
TJ = 25°C
10
VI = 2.8 V
VO = 1.8 V
Co = 1 µF
Figure 4.
40
6
10
Output Spectral Noise Density − nV/
1.75
Hz
2
1.80
30
85
Figure 3.
1.81
35
−15
10
35
60
TA − Free-Air Temperature − °C
Figure 2.
VI = 2.8 V
Co = 1 µF
1.78
−40
−40
Figure 1.
1.82
V O − Output Voltage − V
3.25
0
10
Figure 9.
Copyright © 2006–2007, Texas Instruments Incorporated
Product Folder Link(s): TPS79718-EP TPS79730-EP TPS79733-EP
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
TYPICAL CHARACTERISTICS (continued)
100
50
IO = 10 mA
VO = 1.8 V
Co = 4.7 µF
0
50
100
50
0
−50
VI = 2.8 V
VO = 1.8 V
Co = 4.7 µF
−100
10
5
1 mA
0
IO = 10 mA
Co = 4.7 µF
5.3
4.3
dv
0.14 V
=
dt
µs
200
100
0
−100
0 200 400 600 800 1 k 12
−100
V − Input Voltage − V
I
2.8
TPS79733
LINE TRANSIENT RESPONSE
V − Output Voltage − mV
O
3.8
∆ VO− Change In
Output Voltage − mV
0.14 V
dv
=
µs
dt
TPS79718
LOAD TRANSIENT RESPONSE
Current Load − mA
VO − Output Voltage − mV V − Input Voltage − V
I
TPS79718
LINE TRANSIENT RESPONSE
0 100 200 300 400 500 600 700 800 900 1 k
14 16
18
2k
t − Time − µs
t − Time − µs
Figure 10.
−200
0 100 200 300 400 500 600 700 800 900 1 k
Figure 11.
t − Time − µs
Figure 12.
VI = 4.3 V
Co = 4.7 µF
100
50
I O − Output Current − mA
0
−50
−100
10
∆ V − Change In
O
Output Voltage − mV
TPS79733
LOAD TRANSIENT RESPONSE
5
1 mA
0
0
200 400 600 800 1 k 12 14
16 18
2k
t − Time − µs
Figure 13.
Copyright © 2006–2007, Texas Instruments Incorporated
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7
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
APPLICATION INFORMATION
The TPS797xx family of low-dropout (LDO) regulators haS been optimized for use in micropower applications.
The devices feature extremely low dropout voltages and ultralow quiescent current (1.2 µA typ).
A typical application circuit is shown in Figure 14.
TPS797xx
4
IN
PG 1
100 kΩ
+
C1
0.1 µF
OUT
5
VO
3
−
NC
GND
+
0.47 µF
2
Figure 14. Typical Application Circuit
External Capacitor Requirements
Although not required, a 0.1 µF or larger input bypass capacitor, connected between IN and GND and located
close to the TPS797xx, is recommended, especially when a highly resistive power supply is powering the LDO in
addition to other devices.
Like all low-dropout regulators, the TPS797xx requires an output capacitor connected between OUT and GND to
stabilize the internal control loop. The minimum recommended capacitance is 0.47 µF. Any 0.47 µF capacitor is
suitable. Capacitor values larger than 0.47 µF are acceptable.
Power Dissipation and Junction Temperature
Specified regulator operation is assured to a junction temperature of 125°C; restrict the maximum junction
temperature to 125°C under normal operating conditions. This restriction limits the power dissipation the
regulator can handle in any given application. To ensure the junction temperature is within acceptable limits,
calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than or
equal to PD(max).
T max * T
A
P
+ J
D(max)
R
θJA
The maximum-power-dissipation limit is determined using the following equation:
Where:
TJmax is the maximum allowable junction temperature.
RθJA is the thermal resistance junction-to-ambient for the package (see the Power Dissipation Rating Table).
TA is the ambient temperature.
The regulator dissipation is calculated using:
PD = (VI - VO) × IO
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation triggers the thermal
protection circuit.
8
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Product Folder Link(s): TPS79718-EP TPS79730-EP TPS79733-EP
TPS79718-EP, TPS79730-EP, TPS79733-EP
www.ti.com
SGLS348A – AUGUST 2006 – REVISED OCTOBER 2007
Regulator Protection
The TPS797xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input
voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the
input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might be
appropriate.
The TPS797xx features internal current limiting. During normal operation, the TPS797xx limits output current to
approximately 190 mA. When current limiting engages, the output voltage scales back linearly until the
overcurrent condition ends. Take care not to exceed the power dissipation ratings of the package.
Microcontroller Application
One application for which this device is particularly suited is providing a regulated input voltage and power good
(PG) supervisory signal to low-power devices such as mixed-signal microcontrollers. The quiescent or ground
current of the TPS797xx family is typically 1.2 µA even at full load; therefore, the reduction in battery life by
including the TPS797xx in the system is negligible. The primary benefits of using the TPS797xx to power low
power digital devices include:
• Regulated output voltage that protects the device from battery droop and noise on the line (e.g., switch
bounce)
• Smooth, monotonic power up
• PG signal for controlled device RESET
• Potential to use an existing 5-V power rail to power a 3.3 V or lower device
• Potential to provide separate digital and analog power and ground supplies for a system with only one power
source
Figure 15 shows an application in which the TPS79718 is used to power Texas Instruments MSP430 mixed
signal microcontroller.
VOUT
VIN
VCC
1.8 V
+
0.47 µF
TPS79718
−
MSP430
or Equivalent
0.1 µF
PG
GND
RESET
VSS
Figure 15. MSP430 Microcontroller Powered by the TPS79718 Regulator
Minimal board space is needed to accommodate the DCK (SC70/SOT-323) packaged TPS79718, the 0.1 µF
output capacitor, the 0.47 µF input capacitor, and the pullup resistor on the PG pin.
Copyright © 2006–2007, Texas Instruments Incorporated
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Product Folder Link(s): TPS79718-EP TPS79730-EP TPS79733-EP
9
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
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)
(4/5)
(6)
TPS79718MDCKREP
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAUAG
Level-1-260C-UNLIM
-55 to 125
CKW
TPS79730MDCKREP
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAUAG
Level-1-260C-UNLIM
-55 to 125
BUA
V62/06673-01XE
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAUAG
Level-1-260C-UNLIM
-55 to 125
CKW
V62/06673-02XE
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAUAG
Level-1-260C-UNLIM
-55 to 125
BUA
(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