TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
D Open Drain Power-On Reset With 220-ms
TPS773xx
DGK Package
(TOP VIEW)
Delay (TPS773xx)
D Open Drain Power-Good (PG) Status
D
D
D
D
D
D
D
D
D
D
Output (TPS774xx)
250-mA Low-Dropout Voltage Regulator
Available in 1.5-V, 1.6-V (TPS77316 Only),
1.8-V, 2.7-V, 2.8-V, 3.3-V, 5.0-V Fixed Output
and Adjustable Versions
Dropout Voltage Typically 200 mV
at 250 mA (TPS77333, TPS77433)
Ultralow 92-µA Quiescent Current (Typ)
8-Pin MSOP (DGK) Package
Low Noise (55 µVrms) Without an External
Filter (Bypass) Capacitor (TPS77318,
TPS77418)
2% Tolerance Over Specified Conditions
For Fixed-Output Versions
Fast Transient Response
Thermal Shutdown Protection
See the TPS779xx Family of Devices for
Active High Enable
FB/SENSE
RESET
EN
GND
FB/SENSE
PG
EN
GND
7
3
6
4
5
OUT
OUT
IN
IN
1
8
2
7
3
6
4
5
OUT
OUT
IN
IN
TPS77x33
DROPOUT VOLTAGE
vs
JUNCTION TEMPERATURE
300
VDO – Dropout Voltage – mV
The TPS773xx and TPS774xx are low-dropout
regulators with integrated power-on reset and
power good (PG) function respectively. These
devices are capable of supplying 250 mA of output
current with a dropout of 200 mV (TPS77333,
TPS77433). Quiescent current is 92 µA at full load
dropping down to 1 µA when device is disabled.
These devices are optimized to be stable with a
wide range of output capacitors including low ESR
ceramic (10 µF) or low capacitance (1 µF)
tantalum capacitors. These devices have extremely low noise output performance (55 µVrms)
without using any added filter capacitors.
TPS773xx and TPS774xx are designed to have
fast transient response for larger load current
changes.
8
2
TPS774xx
DGK Package
(TOP VIEW)
250
description
1
IO = 250 mA
200
150
100
IO = 10 mA
50
IO = 0 A
0
–50
–40
0
40
80
120
TJ – Junction Temperature – °C
160
The TPS773xx or TPS774xx is offered in 1.5-V, 1.6 V (TPS77316 only), 1.8-V, 2.7-V, 2.8-V, 3.3-V, and 5.0-V
fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 V to 5.5 V). Output
voltage tolerance is 2% over line, load, and temperature ranges. The TPS773xx and TPS774xx families are
available in 8-pin MSOP (DGK) packages.
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.
Copyright 2001, Texas Instruments Incorporated
PRODUCTION DATA information is 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
description (continued)
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 200 mV
at an output current of 250 mA for 3.3-volt option) 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 92 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.
The device is enabled when the EN pin is connected to a low-level input voltage. 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 at TJ = 25°C.
The TPS773xx features an integrated power-on reset, commonly used as a supply voltage supervisor (SVS),
or reset output voltage. The RESET output of the TPS773xx initiates a reset in DSP, microcomputer or
microprocessor systems at power up and in the event of an undervoltage condition. An internal comparator in
the TPS773xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated
output voltage. When OUT reaches 95% of its regulated voltage, RESET will go to a high-impedance state after
a 220-ms delay. RESET will go to low-impedance state when OUT is pulled below 95% (i.e. over load condition)
of its regulated voltage.
For the TPS774xx, the power good terminal (PG) is an active high output, which can be used to implement a
power-on reset or a low-battery indicator. An internal comparator in the TPS774xx monitors the output voltage
of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT falls below 82%
of its regulated voltage, PG will go to a low-impedance state. PG will go to a high-impedance state when OUT
is above 82% of its regulated voltage.
AVAILABLE OPTIONS
OUTPUT VOLTAGE (V)
TJ
PACKAGED DEVICES MSOP (DGK)
TPS773xx
SYMBOL
TYP
TPS774xx
SYMBOL
5.0
TPS77350DGK
AGN
TPS77450DGK
AGW
3.3
TPS77333DGK
AGM
TPS77433DGK
AGV
2.8
TPS77328DGK
AGK
TPS77428DGK
AGT
2.7
TPS77327DGK
AGJ
TPS77427DGK
AGS
1.8
TPS77318DGK
AGH
TPS77418DGK
AGQ
1.6
TPS77316DGK
AWF
—
—
1.5
TPS77315DGK
AGG
TPS77415DGK
AGP
Adjustable
1.5 V to 5.5 V
TPS77301DGK
AGF
TPS77401DGK
AGO
– 40°C to 125°C
NOTE: The TPS77301 and TPS77401 are programmable using an external resistor divider (see application information).
The DGK package is available taped and reeled. Add an R suffix to the device type (e.g., TPS77301DGKR).
VI
5
IN
OUT
6
OUT
IN
SENSE
0.1 µF
3
PG or
RESET
EN
7
VO
8
1
2
GND
PG or RESET Output
+
10 µF
4
Figure 1. Typical Application Configuration (For Fixed Output Options)
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
functional block diagrams
adjustable version
IN
EN
PG or RESET
_
+
OUT
+
_
220 ms Delay
(for TPS773xx Option)
Vref = 1.183 V
R1
FB/SENSE
R2
External to the Device
GND
fixed-voltage version
IN
EN
PG or RESET
_
+
OUT
+
_
220 ms Delay
(for TPS773xx Option)
SENSE
R1
Vref = 1.183 V
R2
GND
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
TPS773XX
FB/SENSE
1
I
Feedback input voltage for adjustable device (sense input for fixed options)
RESET
2
O
Reset output
EN
3
I
Enable input
GND
4
Regulator ground
IN
5, 6
I
Input voltage
OUT
7, 8
O
Regulated output voltage
FB/SENSE
1
I
Feedback input voltage for adjustable device (sense input for fixed options)
PG
2
O
Power good
EN
3
I
Enable input
TPS774XX
GND
4
Regulator ground
IN
5, 6
I
Input voltage
OUT
7, 8
O
Regulated output voltage
TPS773xx RESET timing diagram
VI
Vres†
Vres†
t
VO
VIT +‡
VIT +‡
Threshold
Voltage
VIT –‡
VIT –‡
t
RESET
Output
Output
Undefined
ÎÎ
ÎÎ
ÎÎ
ÎÎ
220 ms
Delay
220 ms
Delay
ÎÎ
ÎÎ
ÎÎ
ÎÎ
Output
Undefined
t
† Vres is the minimum input voltage for a valid RESET. The symbol Vres is not currently listed within EIA or JEDEC standards for semiconductor
symbology.
‡ VIT – Trip voltage is typically 5% lower than the output voltage (95%VO) VIT– to VIT+ is the hysteresis voltage.
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TPS774xx PG timing diagram
VI
Vres†
Vres†
t
VO
VIT +‡
VIT +‡
Threshold
Voltage
VIT –‡
VIT –‡
t
PG
Output
ÎÎ
ÎÎ
ÎÎ
ÎÎ
ÎÎ
ÎÎ
ÎÎ
ÎÎ
Output
Undefined
Output
Undefined
t
† Vres is the minimum input voltage for a valid PG. The symbol Vres is not currently listed within EIA or JEDEC standards for semiconductor
symbology.
‡ VIT – Trip voltage is typically 18% lower than the output voltage (82%VO) VIT– to VIT+ is the hysteresis voltage.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
absolute maximum ratings over operating free-air temperature (unless otherwise noted)†
Input voltage range‡, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 13.5 V
Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 16.5 V
Maximum RESET voltage (TPS773xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Maximum PG voltage (TPS774xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Output voltage, VO (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 125°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
† 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 terminal ground.
DISSIPATION RATING TABLE – FREE-AIR TEMPERATURES
PACKAGE
AIR FLOW
(CFM)
θJA
(°C/W)
θJC
(°C/W)
TA < 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
0
266.2
3.84
376 mW
3.76 mW/°C
207 mW
150 mW
DGK
150
255.2
3.92
392 mW
3.92 mW/°C
216 mW
157 mW
250
242.8
4.21
412 mW
4.12 mW/°C
227 mW
165 mW
recommended operating conditions
MIN
MAX
Input voltage, VI§
2.7
10
Output voltage range, VO
1.5
5.5
V
0
250
mA
Output current, IO (see Note 1)
UNIT
V
Operating virtual junction temperature, TJ (see Note 1)
– 40
125
°C
§ To calculate the minimum input voltage for your maximum output current, use the following equation: VI(min) = VO(max) + VDO(max load).
NOTE 1: 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.
6
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• DALLAS, TEXAS 75265
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
electrical characteristics over recommended operating junction temperature range (TJ = –40°C to
125°C), VI = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted)
PARAMETER
TEST CONDITIONS
1.5 V ≤ VO ≤ 5.5 V,
Adjustable
voltage
TJ = 25°C
1.5 V ≤ VO ≤ 5.5 V
TJ = 25°C,
2.7 V < VIN < 10 V
2.7 V < VIN < 10 V
1 6 V Output
1.6-V
TJ = 25°C,
2.7 V < VIN < 10 V
2.7 V < VIN < 10 V
1 8 V Output
1.8-V
TJ = 25°C,
2.8 V < VIN < 10 V
2.8 V < VIN < 10 V
2 7 V Output
2.7-V
TJ = 25°C,
3.7 V < VIN < 10 V
3.7 V < VIN < 10 V
2 8 V Output
2.8-V
TJ = 25°C,
3.8 V < VIN < 10 V
3.8 V < VIN < 10 V
3 3 V Output
3.3-V
TJ = 25°C,
4.3 V < VIN < 10 V
4.3 V < VIN < 10 V
5 0 V Output
5.0-V
TJ = 25°C,
6.0 V < VIN < 10 V
6.0 V < VIN < 10 V
1.02VO
1.470
1.530
1.632
Output current limit
Peak output current
2.7
2.646
2.754
V
2.8
2.744
2.856
3.3
3.234
3.366
5.0
4.900
5.100
0.005
55
µVrms
1.3
400
A
mA
°C
1
µA
EN = VI
3
µA
FB = 1.5 V
1
µA
EN = VI,
TJ = 25°C
High level enable input voltage
2
Low level enable input voltage
Enable input current
–1
Power supply ripple rejection (TPS77318, TPS77418)
%/V
mV
144
Adjustable
voltage
µA
A
1
0.9
50% duty cycle
V
%/V
0.05
Thermal shutdown junction temperature
Standby current
V
1.836
92
VO = 0 V
2 ms pulse width,
V
1.8
1.764
TJ = 25°C
BW = 300 Hz to 100 kHz, TJ = 25°C,
TPS77318, TPS77418
Output noise voltage
V
1.6
1.568
VO + 1 V < VI ≤ 10 V, TJ = 25°C
VO + 1 V < VI ≤ 10 V
Load regulation
UNIT
1.5
125
Output voltage line regulation (∆VO/VO)(see Note 3)
FB input current
MAX
VO
TJ = 25°C
Quiescent current (GND current) (see Notes 2 and 4)
TYP
0.98VO
1 5 V Output
1.5-V
Output voltage (see Notes 2 and 4)
MIN
V
0.7
V
1
µA
TJ = 25°C
55
dB
NOTES: 2. Minimum input operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum input voltage = 10 V, minimum output
current 1 mA.
3. If VO < 1.8 V then VI(max) = 10 V, VI(min) = 2.7 V:
Line regulation (mV) + ǒ%ńVǓ
f = 1 kHz,
V
O
ǒVI(max) * 2.7 VǓ
100
1000
If VO > 2.5 V then VI(max) = 10 V, VI(min) = VO + 1 V:
Line regulation (mV) + ǒ%ńVǓ
V
O
ǒVI(max) * ǒVO ) 1ǓǓ
100
1000
4. IO = 1 mA to 250 mA
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TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
electrical characteristics over recommended operating junction temperature range (TJ = –40°C to
125°C), VI = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted) (continued)
PARAMETER
TEST CONDITIONS
Trip threshold voltage
I(PG) = 300 µA,
VO decreasing
Hysteresis voltage
Measured at VO
Output low voltage
VI = 2.7 V,
V(PG) = 5 V
Minimum input voltage for valid PG
PG
(TPS774xx)
Leakage current
Reset
(TPS773xx)
V(PG) ≤ 0.8 V
VDO
UNIT
85
%VO
%VO
1.1
I(PG) = 1 mA
V
Hysteresis voltage
Measured at VO
Output low voltage
VI = 2.7 V,
V(RESET) = 5 V
0.15
0.4
V
1
µA
1.1
92
V
98
%VO
%VO
0.5
I(RESET) = 1 mA
RESET time-out delay
VDO
MAX
0.5
Trip threshold voltage
Leakage current
TYP
79
I(RESET) = 300 µA
VO decreasing
Minimum input voltage for valid RESET
MIN
0.15
0.4
V
1
µA
220
IO = 250 mA,
IO = 250 mA
TJ = 25°C
270
2 8 V Output
2.8-V
TJ = 25°C
200
3 3 V Output
3.3-V
IO = 250 mA,
IO = 250 mA
5 0 V Output
5.0-V
IO = 250 mA,
IO = 250 mA
TJ = 25°C
Dropout voltage (see Note 5)
Dropout voltage (see Note 5)
ms
475
mV
330
125
190
NOTE 5: IN voltage equals VO(typ) – 100 mV; 1.5 V, 1.6 V, 1.8-V, and 2.7-V dropout voltage limited by input voltage range limitations (i.e., 3.3
V input voltage needs to drop to 3.2 V for purpose of this test).
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
vs Output current
2, 3
vs Junction temperature
4, 5
Ground current
vs Junction temperature
6
Power supply rejection ratio
vs Frequency
7
Output spectral noise density
vs Frequency
8
Zo
Output impedance
vs Frequency
9
vs Input voltage
10
VDO
Dropout voltage
vs Junction temperature
11
VO
Output voltage
Line transient response
12, 14
Load transient response
8
13, 15
Output voltage and enable pulse
vs Time
Equivalent series resistance (ESR)
vs Output current
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18 – 21
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TPS77x33
TPS77x18
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.302
1.802
3.301
1.801
VO – Output Voltage – V
VO – Output Voltage – V
TYPICAL CHARACTERISTICS
3.3
1.800
1.799
3.299
3.298
1.798
0
50
100
150
200
IO – Output Current – mA
0
250
50
100
150
200
IO – Output Current – mA
Figure 2
Figure 3
TPS77x33
TPS77x18
OUTPUT VOLTAGE
vs
JUNCTION TEMPERATURE
OUTPUT VOLTAGE
vs
JUNCTION TEMPERATURE
1.86
3.35
VI = 2.8 V
VI = 4.3 V
1.84
VO – Output Voltage – V
VO – Output Voltage – V
3.33
IO = 250 mA
3.31
3.29
1.82
1.80
IO = 1 mA
IO = 50 mA
IO = 250 mA
1.78
3.27
3.25
–40
250
0
40
80
120
TJ – Junction Temperature – °C
160
1.76
–40
0
40
80
120
160
TJ – Junction Temperature – °C
Figure 5
Figure 4
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TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TYPICAL CHARACTERISTICS
TPS77xxx
GROUND CURRENT
vs
JUNCTION TEMPERATURE
115
110
Ground Current – µ A
105
100
IO = 1 mA
95
90
85
IO = 250 mA
80
–40
10
60
110
160
TJ – Junction Temperature – °C
Figure 6
TPS77x33
TPS77x33
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
10
90
IO = 1 mA
CO = 10 µF
TJ = 25 °C
Output Spectral Noise Density – µV Hz
PSRR – Power Supply Rejection Ratio – dB
100
80
70
60
50
40
30
IO = 250 mA
20
10
0
10
100
1k
10k
100k
1M
10M
CO = 10 µF
TJ = 25 °C
IO = 250 mA
1
IO = 1 mA
0.1
0.01
100
f – Frequency – Hz
Figure 8
POST OFFICE BOX 655303
10k
f – Frequency – Hz
Figure 7
10
1k
• DALLAS, TEXAS 75265
100k
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TYPICAL CHARACTERISTICS
TPS77x33
OUTPUT IMPEDANCE
vs
FREQUENCY
10
TJ = 25 °C
Zo – Output Impedance – Ω
IO = 1 mA
1
0.1
IO = 250 mA
0.01
10
100
1k
10k
100k
f – Frequency – Hz
1M
10M
Figure 9
TPS77x01
TPS77x33
DROPOUT VOLTAGE
vs
INPUT VOLTAGE
DROPOUT VOLTAGE
vs
JUNCTION TEMPERATURE
400
300
IO = 250 mA
TJ = 125 °C
250
TJ = 25 °C
300
VDO – Dropout Voltage – mV
VDO – Dropout Voltage – mV
350
TJ = –40 °C
250
200
150
100
200
150
100
IO = 10 mA
50
IO = 0 A
0
50
0
2.7
IO = 250 mA
3.2
3.7
4.2
VI – Input Voltage – V
4.7
–50
–40
0
40
80
120
TJ – Junction Temperature – °C
160
Figure 11
Figure 10
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TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TPS77x18
TPS77x18
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
IO – Output Current – mA
VI – Input Voltage – V
TYPICAL CHARACTERISTICS
3.8
2.8
250
0
+50
∆ VO – Change in
Output Voltage – mV
∆ VO – Change in
Output Voltage – mV
10
0
–10
CO = 10 µF
TJ = 25 °C
IO = 250 mA
0
0.1
0.2 0.3
0.4 0.5 0.6 0.7 0.8
t – Time – ms
0.9
0
–50
CO = 10 µF
TJ = 25 °C
IO = 250 mA
0
1
0.2
0.8 1 1.2 1.4 1.6
t – Time – ms
1.8
2
Figure 13
Figure 12
TPS77x33
TPS77x33
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
IO – Output Current – mA
VI – Input Voltage – V
0.4 0.6
5.3
4.3
250
0
∆ VO – Change in
Output Voltage – mV
∆ VO – Change in
Output Voltage – mV
10
0
–10
CO = 10 µF
TJ = 25 °C
IO = 250 mA
0
0.1
0.2 0.3
0.4 0.5 0.6 0.7 0.8
t – Time – ms
0.9
1
0
–50
CO = 10 µF
TJ = 25 °C
IO = 250 mA
–100
0
0.1
0.4 0.5 0.6 0.7 0.8
t – Time – ms
Figure 15
Figure 14
12
0.2 0.3
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0.9
1
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TYPICAL CHARACTERISTICS
TPS77x33
VO – Output Voltage – V
Enable Pulse – V
OUTPUT VOLTAGE AND
ENABLE PULSE
vs
TIME (AT STARTUP)
CO = 10 µF
TJ = 25 °C
EN
0
0
0
0.2 0.4
0.6
0.8 1.0 1.2 1.4
t – Time – ms
1.6 1.8
2.0
Figure 16
VI
To Load
IN
OUT
+
EN
RL
CO
GND
ESR
Figure 17. Test Circuit for Typical Regions of Stability (Figures 18 through 21) (Fixed Output Options)
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250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
TYPICAL CHARACTERISTICS
TYPICAL REGION OF STABILITY
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
10
Region of Instability
ESR – Equivalent Series Resistance – Ω
ESR – Equivalent Series Resistance – Ω
10
Region of Instability
VO = 3.3 V
CO = 1 µF
VI = 4.3 V
TJ = 25°C
1
Region of Stability
1
Region of Stability
0.1
VO = 3.3 V
CO = 10 µF
VI = 4.3 V
TJ = 25°C
Region of Instability
Region of Instability
0.1
0
50
100
150
200
250
0.01
0
50
100
150
200
250
IO – Output Current – mA
IO – Output Current – mA
Figure 18
Figure 19
TYPICAL REGION OF STABILITY
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
10
10
ESR – Equivalent Series Resistance – Ω
ESR – Equivalent Series Resistance – Ω
Region of Instability
Region of Instability
VO = 3.3 V
CO = 1 µF
VI = 4.3 V
TJ = 125 °C
1
Region of Stability
1
Region of Stability
0.1
VO = 3.3 V
CO = 10 µF
VI = 4.3 V
TJ = 125°C
Region of Instability
Region of Instability
0.01
0.1
0
50
100
150
200
250
0
50
100
150
200
250
IO – Output Current – mA
IO – Output Current – mA
Figure 20
Figure 21
† 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.
14
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SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
APPLICATION INFORMATION
pin functions
enable (EN)
The EN terminal is an input which enables or shuts down the device. If EN is a logic high, the device will be in
shutdown mode. When EN goes to logic low, then the device will be enabled.
power good (PG) (TPS774xx)
The PG terminal is an open drain, active high output that indicates the status of Vout (output of the LDO). When
Vout reaches 82% of the regulated voltage, PG will go to a high-impedance state. It will go to a low-impedance
state when Vout falls below 82% (i.e. over load condition) of the regulated voltage. The open drain output of the
PG terminal requires a pullup resistor.
sense (SENSE)
The SENSE terminal of the fixed-output options must be connected to the regulator output, and the connection
should be as short as possible. Internally, SENSE connects to a high-impedance wide-bandwidth amplifier
through a resistor-divider network and noise pickup feeds through to the regulator output. It is essential to route
the SENSE connection in such a way to minimize/avoid noise pickup. Adding RC networks between the SENSE
terminal and Vout to filter noise is not recommended because it may cause the regulator to oscillate.
feedback (FB)
FB is an input terminal used for the adjustable-output options and must be connected to an external feedback
resistor divider. The FB connection should be as short as possible. It is essential to route it in such a way to
minimize/avoid noise pickup. Adding RC networks between FB terminal and Vout to filter noise is not
recommended because it may cause the regulator to oscillate.
reset (RESET) (TPS773xx)
The RESET terminal is an open drain, active low output that indicates the status of Vout. When Vout reaches 95%
of the regulated voltage, RESET will go to a high-impedance state after a 220-ms delay. RESET will go to a
low-impedance state when Vout is below 95% of the regulated voltage. The open-drain output of the RESET
terminal requires a pullup resistor.
external capacitor requirements
An input capacitor is not usually required; however, a bypass capacitor (0.047 µF or larger) improves load
transient response and noise rejection if the TPS773xx or TPS774xx is located more than a few inches from
the power supply. A higher-capacitance capacitor may be necessary if large (hundreds of milliamps) load
transients with fast rise times are anticipated.
Most low noise LDOs require an external capacitor to further reduce noise. This will impact the cost and board
space. The TPS773xx and TPS774xx have very low noise specification requirements without using any external
components.
Like all low dropout regulators, the TPS773xx or TPS774xx requires an output capacitor connected between
OUT (output of the LDO) and GND (signal ground) to stabilize the internal control loop. The minimum
recommended capacitance value is 1 µF provided the ESR meets the requirement in Figures 19 and 21. In
addition, a low-ESR capacitor can be used if the capacitance is at least 10 µF and the ESR meets the
requirements in Figures 18 and 20. Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic
capacitors are all suitable, provided they meet the requirements described previously.
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250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
APPLICATION INFORMATION
external capacitor requirements (continued)
Ceramic capacitors have different types of dielectric material with each exhibiting different temperature and
voltage variation. The most common types are X5R, X7R, Y5U, Z5U, and NPO. The NPO type ceramic type
capacitors are generally the most stable over temperature. However, the X5R and X7R are also relatively stable
over temperature (with the X7R being the more stable of the two) and are therefore acceptable to use. The Y5U
and Z5U types provide high capacitance in a small geometry, but exhibit large variations over temperature;
therefore, the Y5U and Z5U are not generally recommended for use on this LDO. Independent of which type
of capacitor is used, one must make certain that at the worst case condition the capacitance/ESR meets the
requirement specified in Figures 18 – 21.
Figure 22 shows the output capacitor and its parasitic impedances in a typical LDO output stage.
IO
LDO
–
VESR
RESR
+
+
VI
RLOAD
VO
–
CO
Figure 22. LDO Output Stage With Parasitic Resistances ESR
In steady state (dc state condition), the load current is supplied by the LDO (solid arrow) and the voltage across
the capacitor is the same as the output voltage (VCout = Vout). This means no current is flowing into the Cout
branch. If Iout suddenly increases (transient condition), the following occurs:
D The LDO is not able to supply the sudden current need due to its response time (t1 in Figure 23). Therefore,
capacitor Cout provides the current for the new load condition (dashed arrow). Cout now acts like a battery
with an internal resistance, ESR. Depending on the current demand at the output, a voltage drop will occur
at RESR. This voltage is shown as VESR in Figure 22.
D When Cout is conducting current to the load, initial voltage at the load will be Vout = VCout – VESR. Due to
the discharge of Cout, the output voltage Vout will drop continuously until the response time t1 of the LDO
is reached and the LDO will resume supplying the load. From this point, the output voltage starts rising again
until it reaches the regulated voltage. This period is shown as t2 in Figure 23.
The figure also shows the impact of different ESRs on the output voltage. The left brackets show different levels
of ESRs where number 1 displays the lowest and number 3 displays the highest ESR.
From above, the following conclusions can be drawn:
D The higher the ESR, the larger the droop at the beginning of load transient.
D The smaller the output capacitor, the faster the discharge time and the bigger the voltage droop during the
LDO response period.
16
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250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
APPLICATION INFORMATION
conclusion
To minimize the transient output droop, capacitors must have a low ESR and be large enough to support the
minimum output voltage requirement.
Iout
Vout
1
2
ESR 1
3
ESR 2
ESR 3
t1
t2
Figure 23. Correlation of Different ESRs and Their Influence to the Regulation of Vout at a
Load Step From Low-to-High Output Current
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250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
APPLICATION INFORMATION
programming the TPS77x01 adjustable LDO regulator
The output voltage of the TPS77x01 adjustable regulator is programmed using an external resistor divider as
shown in Figure 24. The output voltage is calculated using:
V
O
+V
ǒ1 ) R1
Ǔ
R2
ref
(1)
Where:
Vref = 1.1834 V typ (the internal reference voltage)
Resistors R1 and R2 should be chosen for approximately 50-µA divider current. Lower value resistors can be
used but offer no inherent advantage and waste more power. Higher values should be avoided, as leakage
currents at FB increase the output voltage error. The recommended design procedure is to choose
R2 = 30.1 kΩ to set the divider current at 50 µA and then calculate R1 using:
R1 +
ǒ
V
V
Ǔ
O *1
ref
(2)
R2
OUTPUT VOLTAGE
PROGRAMMING GUIDE
TPS77x01
VI
0.1 µF
PG or
RESET
IN
PG or RESET Output
250 kΩ
EN
OUT
VO
R1
FB/SENSE
GND
CO
R2
OUTPUT
VOLTAGE
R1
R2
UNIT
2.5 V
33.5
30.1
kΩ
3.3 V
53.8
30.1
kΩ
3.6 V
61.5
30.1
kΩ
NOTE: To reduce noise and prevent
oscillation, R1 and R2 need to be as
close as possible to the FB/SENSE
terminal.
Figure 24. TPS77x01 Adjustable LDO Regulator Programming
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SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
APPLICATION INFORMATION
regulator protection
The TPS773xx or TPS774xx PMOS-pass transistor has a built-in back diode that conducts reverse currents
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. When extended reverse voltage is anticipated, external
limiting may be appropriate.
The TPS773xx or TPS774xx also features internal current limiting and thermal protection. During normal
operation, the TPS773xx or TPS774xx limits output current to approximately 0.9 A. 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:
P
D(max)
T max * T
A
+ J
R
qJA
Where:
TJmax is the maximum allowable junction temperature.
RθJA is the thermal resistance junction-to-ambient for the package, i.e., 266.2°C/W for the 8-terminal
MSOP with no airflow.
TA is the ambient temperature.
The regulator dissipation is calculated using:
P
D
ǒ
Ǔ
+ V *V
I
O
I
O
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the
thermal protection circuit.
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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)
TPS77301DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGF
Samples
TPS77301DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGF
Samples
TPS77315DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGG
Samples
TPS77315DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGG
Samples
TPS77316DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AWF
Samples
TPS77316DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AWF
Samples
TPS77318DGK
LIFEBUY
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGH
TPS77318DGKG4
LIFEBUY
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGH
TPS77318DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGH
Samples
TPS77328DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGK
Samples
TPS77333DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGM
Samples
TPS77333DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGM
Samples
TPS77350DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGN
Samples
TPS77350DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGN
Samples
TPS77401DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGO
Samples
TPS77415DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGP
Samples
TPS77418DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGQ
Samples
TPS77428DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGT
Samples
TPS77433DGK
ACTIVE
VSSOP
DGK
8
80
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGV
Samples
TPS77433DGKR
ACTIVE
VSSOP
DGK
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AGV
Samples
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
10-Dec-2022
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
RoHS & Green
NIPDAU
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
TPS77450DGK
ACTIVE
VSSOP
DGK
8
80
Level-1-260C-UNLIM
-40 to 125
AGW
(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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