TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
ULTRALOW QUIESCENT CURRENT 250-mA
LOW DROPOUT VOLTAGE REGULATORS
FEATURES
1
• 250-mA Low Dropout Voltage Regulator
• Available in 1.5 V, 1.8 V, 2.5 V, 2.7 V, 2.8 V,
3.0 V, 3.3 V, 5.0 V Fixed Output and Adjustable
Versions
• Dropout Voltage to 140 mV (Typ) at 250 mA
(TPS76650)
• Ultralow 35-µA Typical Quiescent Current
• 3% Tolerance Over Specified Conditions for
Fixed Output Versions
• Open-Drain Power Good
• 8-Pin SOIC Package
• Thermal Shutdown Protection
2
DESCRIPTION
Power good (PG) is an active high output that can be
used to implement a power-on reset or a low-battery
indicator.
The TPS766xx is offered in 1.5 V, 1.8 V, 2.5 V, 2.7 V,
2.8 V, 3.0 V, 3.3 V and 5.0 V fixed voltage versions
and in an adjustable version (programmable over the
range of 1.25 V to 5.5 V). Output voltage tolerance is
specified as a maximum of 3% over line, load, and
temperature ranges. The TPS766xx family is
available in an 8-pin SOIC package.
VDO - Output Voltage - V
This device is designed to have an ultralow quiescent
current and be stable with a 4.7-µF capacitor. This
combination provides high performance at a
reasonable cost.
Because the PMOS device behaves as a low-value
resistor, the dropout voltage is very low (typically 230
mV at an output current of 250 mA for the TPS76650)
and is directly proportional to the output current.
Additionally, since the PMOS pass element is a
voltage-driven device, the quiescent current is very
low and independent of output loading (typically 35
µA over the full range of output current, 0 mA to 250
mA). These two key specifications yield a significant
improvement in operating life for battery-powered
systems. This LDO family also features a sleep
mode; applying a TTL high signal to EN (enable)
shuts down the regulator, reducing the quiescent
current to less than 1 µA (typ).
1
2
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.
All trademarks are the property of their respective owners.
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 © 1999–2009, Texas Instruments Incorporated
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
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.
ORDERING INFORMATION (1)
VOUT (2)
PRODUCT
TPS766xxyz
(1)
XX is nominal output voltage (for example, 28 = 2.8V, 01 = Adjustable). (3)
Y 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 see the TI
website at www.ti.com.
Output voltages from 1.5 V to 5.0 V in 50-mV increments are available through the use of innovative factory EEPROM programming;
minimum order quantities may apply. Contact factory for details and availability.
The TPS76601 is programmable using an external resistor divider (see Application Information).
(2)
(3)
ABSOLUTE MAXIMUM RATINGS
Over operating free-air temperature range (unless otherwise noted). (1)
PARAMETER
VI
TPS766xx
UNIT
Input voltage range (2)
–0.3 to 13.5
V
Voltage range at EN
–0.3 to 16.5
V
16.5
V
Maximum PG voltage
Peak output current
Internally limited
Continuous total power dissipation
See Dissipation Ratings Table
VO
Output voltage (OUT, FB)
7
V
TJ
Tstg
Operating virtual junction temperature range
–40 to +125
°C
Storage temperature range
–65 to +150
°C
2
kV
ESD rating, HBM
(1)
Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not implied.
All voltage values are with respect to network terminal ground.
(2)
DISSIPATION RATINGS
PACKAGE
AIR FLOW
(CFM)
TA < +25°C
POWER RATING
DERATING FACTOR
ABOVE TA = +25°C
TA = +70°C
POWER RATING
TA = +85°C
POWER RATING
0
568 mW
5.68 mW/°C
312 mW
227 mW
250
904 mW
9.04 mW/°C
497 mW
361 mW
D
RECOMMENDED OPERATING CONDITIONS
MIN
(1)
VI
Input voltage
VO
Output voltage range
IO
Output current (2)
TJ
Operating virtual junction temperature(2)
(1)
(2)
2
MAX
UNIT
2.7
10
1.2
5.5
V
V
0
250
mA
–40
125
°C
VI(min) = VO(max) + VDO(max load)
To calculate the minimum input voltage for your maximum output current, use the following equation:
Continuous current and operating junction temperature are 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.
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Copyright © 1999–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range, Vi = VO(typ) + 1 V, IO = 10 µA, EN = 0 V, CO = 4.7 µF (unless
otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
5.5 V ≥ VO ≥ 1.25 V,
TJ = +25°C
5.5 V ≥ VO ≥ 1.25 V,
TJ = –40°C to +125°C
TJ = +25°C,
2.7 V < VIN < 10 V
TJ = –40°C to +125°C,
2.7 V < VIN < 10 V
TJ = +25°C,
2.8 V < VIN < 10 V
TJ = –40°C to +125°C,
2.8 V < VIN < 10 V
TJ = +25°C,
3.5 V < VIN < 10 V
TJ = –40°C to +125°C,
3.5 V < VIN < 10 V
TJ = +25°C,
3.7 V < VIN < 10 V
TJ = –40°C to +125°C,
3.7 V < VIN < 10 V
TJ = +25°C,
3.8 V < VIN < 10 V
TJ = –40°C to +125°C,
3.8 V < VIN < 10 V
TJ = +25°C,
4.0 V < VIN < 10 V
TJ = –40°C to +125°C,
4.0 V < VIN < 10 V
TJ = +25°C,
4.3 V < VIN < 10 V
TJ = –40°C to +125°C,
4.3 V < VIN < 10 V
TJ = +25°C,
6.0 V < VIN < 10 V
TJ = –40°C to +125°C,
6.0 V < VIN < 10 V
10 µA < IO < 250 mA,
TJ = +25°C
IO = 250 mA,
TJ = –40°C to +125°C
Output voltage line regulation (ΔVO/VO) (1), (2)
VO + 1 V < VI ≤ 10 V,
TJ = +25°C
Load regulation
IO = 10 µA to 250 mA
TPS76601
TPS76615
TPS76618
TPS76625
Output voltage
(10 µA to 250 mA load)(1)
TPS76627
TPS76628
TPS76630
TPS76633
TPS76650
Quiescent current (GND current) EN = 0 V (1)
CO = 4.7 µF,
Output current limit
0.97 VO
TPS76601
1.03 VO
1.455
1.545
1.8
1.746
1.854
2.5
2.425
2.575
2.7
2.619
2.781
2.884
3.0
2.910
3.090
3.3
3.201
3.399
5.0
4.850
5.150
35
50
0.01
µVrms
0.8
TJ = +25°C
2.7 V < VI < 10 V
EN = VI,
TJ = –40°C to +125°C
2.7 V < VI < 10 V
1.2
°C
1
µA
10
FB = 1.5 V
2
µA
nA
2.0
V
0.8
CO = 4.7 µF,
TJ = +25°C
A
150
Low level enable input voltage
(1)
(2)
%/V
200
TJ = +25°C
EN = VI,
f = 1 kHz,
IO = 10 µA,
µA
0.5%
High level enable input voltage
Power-supply ripple rejection (1)
V
2.8
2.716
VO = 0 V
FB input current
UNIT
1.5
Thermal shutdown junction temperature
Standby current
MAX
VO
BW = 300 Hz to 50 kHz,
Output noise voltage
TYP
63
V
dB
Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V.
If VO ≥ 1.8 V then Vimin = 2.7 V, Vimax = 10 V:
Line Reg. (mV) = (%/V) ´
VO(Vimax - 2.7 V)
100
´ 1000
If VO ≤ 2.5 V then Vimin = VO + 1 V, Vimax = 10 V:
Line Reg. (mV) = (%/V) ´
VO(Vimax - (VO + 1 V))
100
´ 1000
Copyright © 1999–2009, Texas Instruments Incorporated
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
3
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over recommended operating free-air temperature range, Vi = VO(typ) + 1 V, IO = 10 µA, EN = 0 V, CO = 4.7 µF (unless
otherwise noted).
PARAMETER
PG
TEST CONDITIONS
Minimum input voltage for valid PG
IO(PG) = 300 µA
Trip threshold voltage
VO decreasing
Hysteresis voltage
Measured at VO
Output low voltage
VI = 2.7 V,
Leakage current
V(PG) = 5 V
Input current (EN)
TPS76628
TPS76630
Dropout voltage
(3)
TPS76633
TPS76650
(3)
MIN
TYP
MAX
UNIT
98
%VO
1.1
92
0.5
IO(PG) = 1 mA
0.15
EN = 0 V
–1
EN = VI
–1
IO = 250 mA,
TJ = +25°C
IO = 250 mA,
TJ = –40°C to +125°C
IO = 250 mA,
TJ = +25°C
IO = 250 mA,
TJ = –40°C to +125°C
IO = 250 mA,
TJ = +25°C
IO = 250 mA,
TJ = –40°C to +125°C
IO = 250 mA,
TJ = +25°C
IO = 250 mA,
TJ = –40°C to +125°C
0
%VO
0.4
V
1
µA
1
1
µA
310
540
270
470
230
mV
400
140
250
IN voltage equals VO(Typ) – 100 mV; TPS76601 output voltage set to 3.3 V nominal with external resistor divider. TPS76615, TPS76618,
TPS76625, and TPS76627 dropout voltage limited by input voltage range limitations (that is, TPS76630 input voltage must drop to 2.9 V
for purpose of this test).
(1)
CO
(1)
See Applications Information section for capacitor selection details.
Figure 1. Typical Application Configuration for Fixed Output Options
4
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Copyright © 1999–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION
FUNCTIONAL BLOCK DIAGRAM—FIXED-VOLTAGE VERSION
Copyright © 1999–2009, Texas Instruments Incorporated
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
5
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
D PACKAGE
SOIC-8
(TOP VIEW)
NC/FB
1
8
OUT
PG
2
7
OUT
GND
3
6
IN
EN
4
5
IN
PIN DESCRIPTIONS
TPS766xx
NAME
NO.
I/O
DESCRIPTION
EN
4
I
Enable input.
FB/NC
1
I
Feedback input voltage for adjustable device (not connected for fixed options).
GND
3
Regulator ground.
IN
5, 6
I
Input voltage.
OUT
7, 8
O
Regulated output voltage.
2
O
Power good output.
PG
Table 1. Table of Graphs
FIGURE
Output voltage
Ground current
vs Load current
Figure 2, Figure 3
vs Free-air temperature
Figure 4, Figure 5
vs Load current
Figure 6, Figure 7
vs Free-air temperature
Figure 8, Figure 9
Power-supply ripple rejection
vs Frequency
Figure 10
Output spectral noise density
vs Frequency
Figure 11
Output impedance
vs Frequency
Figure 12
Dropout voltage
vs Free-air temperature
Figure 13, Figure 14
Line transient response
Figure 15, Figure 17
Load transient response
Figure 16, Figure 18
Output voltage
vs Time
Dropout voltage
vs Input voltage
Equivalent series resistance (ESR)
vs Output current
Equivalent series resistance (ESR)
vs Added ceramic capacitance
6
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Figure 19
Figure 20
Figure 21 to Figure 24
Figure 25, Figure 26
Copyright © 1999–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
TYPICAL CHARACTERISTICS
TPS76633
OUTPUT VOLTAGE
vs
LOAD CURRENT
TPS76615
OUTPUT VOLTAGE
vs
LOAD CURRENT
Figure 2.
Figure 3.
TPS76633
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
TPS76615
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
Figure 4.
Figure 5.
Copyright © 1999–2009, Texas Instruments Incorporated
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
7
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
8
TPS76633
GROUND CURRENT
vs
LOAD CURRENT
TPS76615
GROUND CURRENT
vs
LOAD CURRENT
Figure 6.
Figure 7.
TPS76633
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
TPS76615
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
Figure 8.
Figure 9.
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
TYPICAL CHARACTERISTICS (continued)
TPS76633
POWER-SUPPLY RIPPLE REJECTION
vs
FREQUENCY
TPS76633
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
Figure 10.
Figure 11.
TPS76633
OUTPUT IMPEDANCE
vs
FREQUENCY
TPS76650
DROPOUT VOLTAGE
vs
FREE-AIR TEMPEATURE
Figure 12.
Figure 13.
Copyright © 1999–2009, Texas Instruments Incorporated
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
9
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
10
TPS76633
DROPOUT VOLTAGE
vs
FREE-AIR TEMPEATURE
TPS76615
LINE TRANSIENT RESPONSE
Figure 14.
Figure 15.
TPS76633
LOAD TRANSIENT RESPONSE
TPS76633
LINE TRANSIENT RESPONSE
Figure 16.
Figure 17.
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
TYPICAL CHARACTERISTICS (continued)
TPS76633
LOAD TRANSIENT RESPONSE
TPS76633
OUTPUT VOLTAGE
vs
TIME (AT STARTUP)
Figure 18.
Figure 19.
TPS76601
DROPOUT VOLTAGE
vs
INPUT VOLTAGE
Figure 20.
Copyright © 1999–2009, Texas Instruments Incorporated
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TPS76601
11
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE(1)
vs
OUTPUT CURRENT
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE(1)
vs
OUTPUT CURRENT
Figure 21.
Figure 22.
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE(1)
vs
OUTPUT CURRENT
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE(1)
vs
OUTPUT CURRENT
Figure 23.
Figure 24.
(1)
Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any
series resistance added externally, and PWB trace resistance to CO.
12
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
TYPICAL CHARACTERISTICS (continued)
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE(1)
vs
ADDED CERAMIC CAPACITANCE
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE(1)
vs
ADDED CERAMIC CAPACITANCE
Figure 25.
Figure 26.
(1)
Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any
series resistance added externally, and PWB trace resistance to CO.
Figure 27. Test Circuit for Typical Regions of Stability (Figure 21 through Figure 24) (Fixed Output
Options)
Copyright © 1999–2009, Texas Instruments Incorporated
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TPS76601
13
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
APPLICATION INFORMATION
The TPS766xx family includes eight fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, 2.7 V, 2.8 V, 3.0 V,
3.3 V, and 5.0 V), and an adjustable regulator, the TPS76601 (adjustable from 1.25 V to 5.5 V).
DEVICE OPERATION
The TPS766xx features very low quiescent current that remains virtually constant even with varying loads.
Conventional LDO regulators use a pnp pass element, the base current of which is directly proportional to the
load current through the regulator (IB = IC/β). The TPS766xx uses a PMOS transistor to pass current; because
the gate of the PMOS is voltage driven, operating current is low and invariable over the full load range.
Another pitfall associated with the pnp pass element is its tendency to saturate when the device goes into
dropout. The resulting drop in β forces an increase in IB to maintain the load. During power up, this increase in IB
translates to large start-up currents. Systems with limited supply current may fail to start up. In battery-powered
systems, it means rapid battery discharge when the voltage decays below the minimum required for regulation.
The TPS766xx quiescent current remains low even when the regulator drops out, eliminating both problems.
The TPS766xx family also features a shutdown mode that places the output in the high-impedance state
(essentially equal to the feedback-divider resistance) and reduces quiescent current to 1 µA (typ). If the
shutdown feature is not used, EN should be tied to ground. Response to an enable transition is quick; regulated
output voltage is reestablished in typically 160 µs.
MINIMUM LOAD REQUIREMENTS
The TPS766xx family is stable even at zero load; no minimum load is required for operation.
FB—PIN CONNECTION (ADJUSTABLE VERSION ONLY)
The FB pin is an input pin to sense the output voltage and close the loop for the adjustable option. The output
voltage is sensed through a resistor divider network to close the loop as shown in Figure 29. Normally, this
connection should be as short as possible; however, the connection can be made near a critical circuit to
improve performance at that point. Internally, FB connects to a high-impedance, wide-bandwidth amplifier and
noise pickup feeds through to the regulator output. Routing the FB connection to minimize or avoid noise pickup
is essential.
EXTERNAL CAPACITOR REQUIREMENTS
An input capacitor is not usually required; however, a ceramic bypass capacitor (0.047 µF or larger) improves
load transient response and noise rejection if the TPS766xx is located more than a few inches from the power
supply. A higher-capacitance electrolytic capacitor may be necessary if large (hundreds of milliamps) load
transients with fast rise times are anticipated.
Like most low dropout regulators, the TPS766xx requires an output capacitor connected between OUT and GND
to stabilize the internal control loop. The minimum recommended capacitance value is 4.7 µF and the ESR
(equivalent series resistance) must be between 300 mW and 20 Ω. Capacitor values 4.7 µF or larger are
acceptable, provided the ESR is less than 20 Ω. Solid tantalum electrolytic and aluminum electrolytic capacitors
are all suitable, provided they meet the requirements described previously. Ceramic capacitors, with series
resistors that are sized to meet the previously described requirements, may also be used.
14
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009
Figure 28. Typical Application Circuit (Fixed Versions)
PROGRAMMING THE TPS76601 ADJUSTABLE LDO REGULATOR
The output voltage of the TPS76601 adjustable regulator is programmed using an external resistor divider as
shown in Figure 29. The output voltage is calculated using:
(1)
Where:
•
Vref = 1.224 V typ (the internal reference voltage)
Resistors R1 and R2 should be chosen for approximately 7-µA divider current. Lower value resistors can be
used but offer no inherent advantage and waste more power. Higher values should be avoided because leakage
currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 169 kΩ
to set the divider current at 7 µA, and then calculate R1 using:
(2)
Figure 29. TPS76601 Adjustable LDO Regulator Programming
Copyright © 1999–2009, Texas Instruments Incorporated
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Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
15
TPS76615,, TPS76618,, TPS76625
TPS76627, TPS76628, TPS76630
TPS76633, TPS76650, TPS76601
SLVS237C – AUGUST 1999 – REVISED JANUARY 2009................................................................................................................................................. www.ti.com
POWER-GOOD INDICATOR
The TPS766xx features a power-good (PG) output that can be used to monitor the status of the regulator. The
internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal
regulated value, the PG output transistor turns on, taking the signal low. The open-drain output requires a pullup
resistor. If not used, it can be left floating. PG can be used to drive power-on reset circuitry or used as a
low-battery indicator.
REGULATOR PROTECTION
The TPS766xx PMOS-pass transistor has a built-in back diode that conducts reverse currents when the input
voltage drops below the output voltage (for example, during power down). Current is conducted from the output
to the input and is not internally limited. When extended reverse voltage is anticipated, external limiting may be
appropriate.
The TPS766xx also features internal current limiting and thermal protection. During normal operation, the
TPS766xx limits output current to approximately 0.8 A (typ). When current limiting engages, the output voltage
scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross
device failure, care should be taken not to exceed the power dissipation ratings of the package. If the
temperature of the device exceeds +150°C (typ), thermal-protection circuitry shuts it down. Once the device has
cooled below +130°C (typ), regulator operation resumes.
POWER DISSIPATION AND JUNCTION TEMPERATURE
Specified regulator operation is assured to a junction temperature of +125°C; the maximum junction temperature
should be restricted 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).
The maximum-power-dissipation limit is determined using the following equation:
(3)
Where:
•
•
•
TJmax is the maximum allowable junction temperature;
RθJA is the thermal resistance junction-to-ambient for the package (that is, 176°C/W for the 8-terminal SOIC);
and
TA is the ambient temperature.
The regulator dissipation is calculated using:
(4)
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation triggers the thermal
protection circuit.
16
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Copyright © 1999–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS76615 TPS76618 TPS76625 TPS76627 TPS76628 TPS76630 TPS76633 TPS76650
TPS76601
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-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)
TPS76601D
LIFEBUY
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76601
TPS76601DG4
LIFEBUY
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76601
TPS76601DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76601
Samples
TPS76615D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76615
Samples
TPS76615DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76615
Samples
TPS76618D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76618
Samples
TPS76618DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76618
Samples
TPS76625D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76625
Samples
TPS76625DR
LIFEBUY
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76625
TPS76628D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76628
Samples
TPS76628DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76628
Samples
TPS76630D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76630
Samples
TPS76633D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
76633
Samples
TPS76633DG4
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
76633
Samples
TPS76633DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
76633
Samples
TPS76650D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76650
Samples
TPS76650DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76650
Samples
TPS76650DRG4
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
76650
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.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2022
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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