TPS77818 [TI]
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS; 快速瞬态响应750 mA低压差稳压器
| 型号： | TPS77818 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS |
| 文件： | 总21页 (文件大小：306K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
PWP PACKAGE
(TOP VIEW)
Open Drain Power-On Reset With 200-ms
Delay (TPS777xx)
Open Drain Power Good (TPS778xx)
750-mA Low-Dropout Voltage Regulator
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND/HSINK
GND/HSINK
GND/HSINK
NC
GND/HSINK
GND
Available in 1.5-V, 1.8-V, 2.5-V, 3.3-V Fixed
Output and Adjustable Versions
NC
NC
EN
RESET/PG
FB/NC
Dropout Voltage to 260 mV (Typ) at 750 mA
(TPS77x33)
IN
IN
OUT
Ultra Low 85 µA Typical Quiescent Current
NC
OUT
Fast Transient Response
GND/HSINK
GND/HSINK
GND/HSINK
GND/HSINK
2% Tolerance Over Specified Conditions for
Fixed-Output Versions
NC – No internal connection
8-Pin SOIC and 20-Pin TSSOP PowerPAD
(PWP) Package
D PACKAGE
(TOP VIEW)
Thermal Shutdown Protection
GND
EN
IN
RESET/PG
FB/NC
OUT
1
2
3
4
8
7
6
5
description
TPS777xx and TPS778xx are designed to have a
fast transient response and be stable with a 10-µF
low ESR capacitors. This combination provides
high performance at a reasonable cost.
IN
OUT
TPS77x33
DROPOUT VOLTAGE
vs
TPS77x33
FREE-AIR TEMPERATURE
LOAD TRANSIENT RESPONSE
3
2
1
0
10
10
10
10
C
= 2x47 µF
O
ESR = 1/2x100 mΩ
= 3.3 V
50
0
V
O
I
= 750 mA
O
V = 4.3 V
I
–50
1000
500
0
I
O
= 10 mA
–1
10
10
I
= 0
O
C
= 10 µF
O
–2
–60 –40 –20
T
0
20 40 60 80 100 120 140
0
20 40 60 80 100 120 140 160 180 200
– Free-Air Temperature – °C
t – Time – µs
A
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.
PowerPAD is a trademark of Texas Instruments Incorporated.
Copyright 1999, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
description (continued)
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 260 mV
at an output current of 750 mA for the TPS77x33) 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 85 µA over the full range of output current, 0 mA to 750 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 1 µA at T = 25°C.
J
TheRESET output of the TPS777xx initiates a reset in microcomputer and microprocessor systems in the event
of an undervoltage condition. An internal comparator in the TPS777xx monitors the output voltage of the
regulator to detect an undervoltage condition on the regulated output voltage.
Power good (PG) of the TPS778xx is an active high output, which can be used to implement a power-on reset
or a low-battery indicator.
The TPS777xx and TPS778xx are offered in 1.5-V, 1.8-V, 2.5-V, and 3.3-V fixed-voltage versions and in an
adjustable version (programmable over the range of 1.5 V to 5.5 V for TPS77701 option and 1.2 V to 5.5 V for
TPS77801 option). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature
ranges. The TPS777xx and TPS778xx families are available in 8 pin SOIC and 20 pin PWP packages.
AVAILABLE OPTIONS
OUTPUT
VOLTAGE
(V)
PACKAGED DEVICES
T
J
TSSOP
(PWP)
SOIC
(D)
TYP
3.3
2.5
1.8
1.5
TPS77733PWP TPS77833PWP
TPS77725PWP TPS77825PWP
TPS77718PWP TPS77818PWP
TPS77715PWP TPS77815PWP
TPS77733D
TPS77833D
TPS77825D
TPS77818D
TPS77815D
TPS77725D
TPS77718D
TPS77715D
–40°C to 125°C
Adjustable
1.5 V to 5.5 V
TPS77701PWP
—
—
TPS77701D
—
—
Adjustable
1.2 V to 5.5 V
TPS77801PWP
TPS77801D
TheTPS77x01isprogrammableusinganexternalresistordivider(seeapplicationinformation).TheDandPWP
packages are available taped and reeled. Add an R suffix to the device type (e.g., TPS77701DR).
6
7
16
RESET/
PG
V
I
IN
IN
RESET/PG
14
13
OUT
OUT
V
O
5
0.1 µF
EN
†
C
O
+
10 µF
GND
3
†
See application information section for capacitor selection details.
Figure 1. Typical Application Configuration for Fixed Output Options
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
functional block diagram—adjustable version
IN
EN
PG or RESET
OUT
_
+
+
_
200 ms Delay
(for RESET Option)
R1
V
ref
= 1.1834 V
FB/NC
R2
GND
External to the device
functional block diagram—fixed-voltage version
IN
EN
PG or RESET
OUT
_
+
+
_
200 ms Delay
(for RESET Option)
R1
V
ref
= 1.1834 V
R2
GND
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
Terminal Functions – SOIC Package (TPS777xx)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
2
EN
I
I
Enable input
FB/NC
GND
IN
7
Feedback input voltage for adjustable device (no connect for fixed options)
1
Regulator ground
Input voltage
3, 4
5, 6
8
I
OUT
O
O
Regulated output voltage
RESET output
RESET
Terminal Functions – TSSOP Package (TPS777xx)
TERMINAL
NAME
I/O
DESCRIPTION
NO.
EN
5
15
3
I
I
Enable input
FB/NC
GND
Feedback input voltage for adjustable device (no connect for fixed options)
Regulator ground
Ground/heatsink
GND/HSINK
1, 2, 9, 10, 11,
12, 19, 20
IN
6, 7
4, 8, 17, 18
13, 14
I
Input
NC
No connect
OUT
RESET
O
O
Regulated output voltage
RESET output
16
Terminal Functions – SOIC Package (TPS778xx)
TERMINAL
NAME
I/O
DESCRIPTION
NO.
2
EN
I
I
Enable input
FB/NC
GND
IN
7
Feedback input voltage for adjustable device (no connect for fixed options)
1
Regulator ground
Input voltage
3, 4
5, 6
8
I
OUT
PG
O
O
Regulated output voltage
PG output
Terminal Functions – TSSOP Package (TPS778xx)
TERMINAL
NAME
I/O
DESCRIPTION
NO.
EN
5
15
3
I
I
Enable input
FB/NC
GND
Feedback input voltage for adjustable device (no connect for fixed options)
Regulator ground
Ground/heatsink
GND/HSINK
1, 2, 9, 10, 11,
12, 19, 20
IN
6, 7
4, 8, 17, 18
13, 14
I
Input
NC
OUT
PG
No connect
O
O
Regulated output voltage
PG output
16
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TPS777xx RESET timing diagram
V
I
†
V
res
V
res
t
‡
‡
V
O
V
IT+
V
IT+
Threshold
Voltage
Less than 5% of the
output voltage
‡
‡
V
IT–
V
IT–
t
RESET
Output
200 ms
Delay
200 ms
Delay
Output
Undefined
Output
Undefined
t
†
V
is the minimum input voltage for a valid RESET. The symbol V is not currently listed within EIA or JEDEC standards
res
res
for semiconductor symbology.
‡
VIT –Trip voltage is typically 5% lower than the output voltage (95%V ) V
O
IT–
to V
is the hysteresis voltage.
IT+
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Input voltage range , V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 13.5 V
I
Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 16.5 V
Maximum RESET voltage (TPS777xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Maximum PG voltage (TPS778xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Output voltage, V (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
O
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating tables
Operating virtual junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 125°C
J
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
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 1 – FREE-AIR TEMPERATURES
AIR FLOW
(CFM)
T
< 25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING POWER RATING
A
0
568 mW
5.68 mW/°C
9.04 mW/°C
312 mW
497 mW
227 mW
361 mW
D
250
904 mW
DISSIPATION RATING TABLE 2 – FREE-AIR TEMPERATURES
AIR FLOW
(CFM)
T
< 25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING POWER RATING
A
0
2.9 W
23.5 mW/°C
34.6 mW/°C
23.8 mW/°C
57.9 mW/°C
1.9 W
2.8 W
1.9 W
4.6 W
1.5 W
2.2 W
1.5 W
3.8 W
#
PWP
PWP
300
0
4.3 W
3 W
||
300
7.2 W
#
||
This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in × 5-in PCB, 1 oz. copper,
2-in × 2-in coverage (4 in ).
This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in × 2-in PCB, 1 oz. copper
2
2
2
with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in ) and layers 3 and 6 at 100% coverage (6 in ). For more information, refer
to TI technical brief SLMA002.
recommended operating conditions
MIN
2.7
1.5
1.2
0
MAX
10
UNIT
V
Input voltage, V
I
TPS77701
TPS77801
5.5
Output voltage range, V
V
O
5.5
Output current, I (Note 1)
750
125
mA
O
Operating virtual junction temperature, T (Note 1)
–40
°C
J
To calculate the minimum input voltage for your maximum output current, use the following equation: V
I(min)
= V
+ V
.
DO(max load)
O(max)
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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
electrical characteristics over recommended operating free-air temperature range,
V = V
+ 1 V, I = 1 mA, EN = 0 V, C = 10 µF (unless otherwise noted)
i
O(typ)
O
O
PARAMETER
TEST CONDITIONS
1.5 V ≤ V ≤ 5.5 V, T = 25°C
MIN
TYP
MAX
UNIT
V
O
O
J
TPS77701
TPS77801
TPS77x15
TPS77x18
TPS77x25
TPS77x33
1.5 V ≤ V ≤ 5.5 V,
T = –40°C to 125°C
0.98V
1.02V
O
J
O
O
1.2 V ≤ V ≤ 5.5 V,
T = 25°C
J
V
O
O
1.2 V ≤ V ≤ 5.5 V,
T = –40°C to 125°C
J
0.98V
1.02V
O
O
O
T = 25°C,
J
2.7 V < V < 10 V
IN
1.5
1.8
2.5
3.3
85
Output voltage
(10 µA to 750 mA load)
(see Note 2)
T = –40°C to 125°C, 2.7 V < V < 10 V
J IN
1.470
1.764
2.450
3.234
1.530
1.836
2.550
3.366
125
V
T = 25°C,
J
2.8 V < V < 10 V
IN
T = –40°C to 125°C, 2.8 V < V < 10 V
J IN
T = 25°C,
J
3.5 V < V < 10 V
IN
T = –40°C to 125°C, 3.5 V < V < 10 V
J IN
T = 25°C,
J
4.3 V < V < 10 V
IN
T = –40°C to 125°C, 4.3 V < V < 10 V
J IN
10 µA < I < 750 mA, T = 25°C
O
J
Quiescent current (GND current) (see Note 2)
µA
I
O
= 750 mA,
T = –40°C to 125°C
J
Output voltage line regulation (∆V /V
(see Notes 2 and 3)
O
O
)
V
O
+ 1 V < V ≤ 10 V, T = 25°C
0.01
3
%/V
mV
I
J
Load regulation
BW = 300 Hz to 50 kHz,
Output noise voltage
Output current Limit
190
µVrms
C
= 10 µF,
T = 25°C
J
O
V
O
= 0 V
1.7
2
A
Thermal shutdown junction temperature
150
°C
EN = V
EN = V
T = 25°C,
J
I,
I,
1
µA
µA
2.7 V < V < 10 V
I
Standby current
T = –40°C to 125°C
J
10
2.7 V < V < 10 V
I
FB input current
TPS77x01
FB = 1.5 V
2
nA
V
High level enable input voltage
Low level enable input voltage
1.7
92
0.9
V
f = 1 KHz,
T = 25°C
J
C
= 10 µF,
O
Power supply ripple rejection (see Note 2)
Minimum input voltage for valid RESET
60
dB
V
I
= 300µA
1.1
O(RESET)
decreasing
Trip threshold voltage
Hysteresis voltage
V
98
%V
%V
V
O
O
Measured at V
0.5
Reset
O
O
(TPS777xx)
Output low voltage
V = 2.7 V,
I
I
= 1mA
O(RESET)
0.15
0.4
1
Leakage current
V
= 5 V
µA
ms
V
(RESET)
RESET time-out delay
Minimum input voltage for valid PG
Trip threshold voltage
Hysteresis voltage
200
1.1
I
= 300µA
O(PG)
V
O
decreasing
92
98
%V
%V
V
O
PG
(TPS778xx)
Measured at V
0.5
O
O
Output low voltage
V = 2.7 V,
I
I
= 1mA
O(PG)
0.15
0.4
1
Leakage current
V
(PG)
= 5 V
µA
NOTE 2: Minimum IN operating voltage is 2.7 V or V
+ 1 V, whichever is greater. Maximum IN voltage 10V.
O(typ)
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
electrical characteristics over recommended operating free-air temperature range,
V = V
+ 1 V, I = 1 mA, EN = 0 V, C = 10 µF (unless otherwise noted) (continued)
i
O(typ)
O
O
PARAMETER
TEST CONDITIONS
MIN
–1
TYP
MAX
UNIT
EN = 0 V
0
1
1
Input current (EN)
µA
EN = V
–1
I
I
O
I
O
I
O
I
O
= 750 mA,
= 750 mA,
= 750 mA,
= 750 mA,
T = 25°C
260
260
J
TPS77733
TPS77833
T = –40°C to 125°C
J
427
427
Dropout voltage
(See Note 4)
mV
T = 25°C
J
T = –40°C to 125°C
J
NOTES: 3. If V ≤ 1.8 V then V
imin
= 2.7 V, V = 10 V:
imax
O
V
V
V
2.7 V
1000
O
O
imax
100
Line Reg. (mV)
% V
If V ≥ 2.5 V then V
imin
= V + 1 V, V
imax
= 10 V:
% V
O
O
V
V
1 V
imax
O
Line Reg. (mV)
1000
100
4. IN voltage equals V (Typ) – 100 mV; TPS77x01 output voltage set to 3.3 V nominal with external resistor divider. TPS77x15,
O
TPS77x18, and TPS77x25 dropout voltage limited by input voltage range limitations (i.e., TPS77x33 input voltage needs to drop
to 3.2 V for purpose of this test).
Table of Graphs
FIGURE
vs Output current
vs Free-air temperature
vs Free-air temperature
vs Frequency
2, 3, 4
5, 6, 7
8
V
Output voltage
O
Ground current
Power supply ripple rejection
Output spectral noise density
Output impedance
9
vs Frequency
10
Z
o
vs Frequency
11
vs Input voltage
12
V
DO
Dropout voltage
vs Free-air temperature
13
Line transient response
Load transient response
Output voltage
14, 16
15, 17
18
vs Time
Equivalent series resistance (ESR)
vs Output current
20 – 23
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TYPICAL CHARACTERISTICS
TPS77x15
TPS77x33
OUTPUT VOLTAGE
OUTPUT VOLTAGE
vs
vs
OUTPUT CURRENT
OUTPUT CURRENT
1.4985
3.2835
3.2830
V = 2.7 V
I
V = 4.3 V
I
T
A
= 25°C
T
A
= 25°C
1.4980
1.4975
1.4970
1.4965
1.4960
3.2825
3.2820
3.2815
3.2810
3.2805
3.2800
1.4955
1.4950
0
0.125
0.25 0.375
0.5
0.675
0.75
0
0.125
0.25 0.375
O
0.5
0.675
0.75
I
– Output Current – A
I
– Output Current – A
O
Figure 2
Figure 3
TPS77x25
TPS77x33
OUTPUT VOLTAGE
vs
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
FREE-AIR TEMPERATURE
2.4960
2.4955
2.4950
2.4945
3.32
3.31
V = 4.3 V
V = 3.5 V
I
A
I
T
= 25°C
3.30
3.29
3.28
3.27
3.26
3.25
I
O
= 750 mA
2.4940
2.4935
2.4930
I
O
= 1 mA
2.4925
2.4920
0
0.125
0.25 0.375
0.5
0.675
0.75
–60 –40 –20
0
20 40 60 80 100 120 140
I
O
– Output Current – A
T
A
– Free-Air Temperature – °C
Figure 4
Figure 5
9
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TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TYPICAL CHARACTERISTICS
TPS77x15
OUTPUT VOLTAGE
vs
TPS77x25
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
1.515
2.515
2.510
2.505
2.500
2.495
2.490
V = 3.5 V
I
V = 2.7 V
I
1.510
1.505
1.500
1.495
1.490
1.485
I
O
= 750 mA
I
O
= 750 mA
I
= 1 mA
O
I
O
= 1 mA
2.485
2.480
–60 –40 –20
0
20 40 60 80 100 120 140
–60 –40 –20
0
20
40
60
80 100 120
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 6
Figure 7
TPS77xxx
GROUND CURRENT
vs
TPS77x33
POWER SUPPLY RIPPLE REJECTION
vs
FREE-AIR TEMPERATURE
FREQUENCY
90
100
V = 4.3 V
I
80
70
C
= 10 µF
= 25°C
O
T
A
95
90
85
80
75
60
50
40
30
20
I
= 500 mA
O
I
= 1 mA
O
I
= 750 mA
O
10
0
–10
10
100
1k
10k
100k
1M
–60 –40 –20
0
20 40 60 80 100 120 140
f – Frequency – Hz
T
A
– Free-Air Temperature – °C
Figure 8
Figure 9
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TYPICAL CHARACTERISTICS
TPS77x33
TPS77x33
OUTPUT IMPEDANCE
vs
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
FREQUENCY
–5
–6
10
0
–1
–2
V = 4.3 V
I
V = 4.3 V
I
C
= 10 µF
= 25°C
O
C
T
A
= 10 µF
= 25°C
O
T
A
I
O
= 1 mA
I
O
= 7 mA
10
10
I
O
= 750 mA
–7
–8
10
I
O
= 750 mA
10
10
2
3
10
4
10
5
10
10
1
2
10
3
10
4
10
5
10
6
10
10
f – Frequency – Hz
f – Frequency – kHz
Figure 10
Figure 11
TPS77x01
TPS77x33
DROPOUT VOLTAGE
vs
DROPOUT VOLTAGE
vs
INPUT VOLTAGE
FREE-AIR TEMPERATURE
600
500
400
300
200
100
0
3
2
1
0
10
10
10
10
I
O
= 750 mA
I
O
= 750 mA
T
A
= 125°C
T
A
= 25°C
I
O
= 10 mA
T
A
= –40°C
–1
10
I
O
= 0
C
= 10 µF
O
–2
10
2.5
3
3.5
4
4.5
5
–60 –40 –20
0
20 40 60 80 100 120 140
V – Input Voltage – V
I
T
A
– Free-Air Temperature – °C
Figure 12
Figure 13
11
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TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TYPICAL CHARACTERISTICS
TPS77x15
TPS77x15
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
C
= 2x47 µF
O
ESR = 1/2x100 mΩ
= 1.5 V
V = 2.7 V
I
3.7
2.7
50
0
V
O
–50
1000
500
10
0
0
–10
C
T
A
= 10 µF
= 25°C
L
0
20 40 60 80 100 120 140 160 180 200
0
20 40 60 80 100 120 140 160 180 200
t – Time – µs
t – Time – µs
Figure 14
Figure 15
TPS77x33
TPS77x33
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
C
= 2x47 µF
O
C
T
= 10 µF
= 25°C
L
A
ESR = 1/2x100 mΩ
= 3.3 V
50
0
V
O
V = 4.3 V
I
5.3
–50
4.3
10
1000
500
0
0
–10
0
20 40 60 80 100 120 140 160 180 200
0
20 40 60 80 100 120 140 160 180 200
t – Time – µs
t – Time – µs
Figure 16
Figure 17
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TYPICAL CHARACTERISTICS
TPS77x33
OUTPUT VOLTAGE
vs
TIME (AT STARTUP)
4
3
2
1
0
0
0
20 40 60 80 100 120 140 160 180 200
t – Time – µs
Figure 18
To Load
IN
V
I
OUT
+
R
C
O
R
L
EN
GND
ESR
Figure 19. Test Circuit for Typical Regions of Stability (Figures 20 through 23) (Fixed Output Options)
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
TYPICAL CHARACTERISTICS
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
vs
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
vs
†
†
OUTPUT CURRENT
OUTPUT CURRENT
10
10
Region of Instability
Region of Instability
1
1
Region of Stability
Region of Stability
V
C
= 3.3 V
= 4.7 µF
o
L
V
= 3.3 V
o
C = 4.7 µF
l
V = 4.3 V
V = 4.3 V
I
A
I
J
T
= 125°C
T
= 25°C
0.1
0.1
0
125
250
375
500
625
750
0
125
250
375
500
625
750
I
O
– Output Current – mA
I
O
– Output Current – mA
Figure 20
Figure 21
TYPICAL REGION OF STABILITY
TYPICAL REGION OF STABILITY
†
†
EQUIVALENT SERIES RESISTANCE
EQUIVALENT SERIES RESISTANCE
vs
vs
OUTPUT CURRENT
OUTPUT CURRENT
10
10
Region of Instability
Region of Instability
1
1
Region of Stability
Region of Stability
V
C
= 3.3 V
= 22 µF
V = 3.3 V
o
o
L
C = 22 µF
l
V = 4.3 V
I
J
V = 4.3 V
I
A
T
= 125°C
T
= 25°C
0.1
0.1
0
125
250
375
500
625
750
0
125
I
250
375
500
625
750
I
O
– Output Current – mA
– Output Current – mA
O
Figure 22
Figure 23
†
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 C
.
O
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
APPLICATION INFORMATION
The TPS777xx and TPS778xx families include four fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, and
3.3 V), and an adjustable regulator, the TPS77x01 (adjustable from 1.5 V to 5.5 V for TPS77701 option and 1.2
V to 5.5 V for TPS77801 option).
device operation
The TPS777xx and TPS778xx feature very low quiescent current, which 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 (I = I /β). The TPS777xx and TPS778xx use a PMOS
B
C
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 I to maintain the load. During power up, this translates
B
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
TPS777xx and TPS778xx quiescent currents remain low even when the regulator drops out, eliminating both
problems.
The TPS777xx and TPS778xx families also feature a shutdown mode that places the output in the
high-impedance state (essentially equal to the feedback-divider resistance) and reduces quiescent current to
2 µA. If the shutdown feature is not used, EN should be tied to ground. Response to an enable transition is quick;
regulated output voltage is typically reestablished in 120 µs.
minimum load requirements
The TPS777xx and TPS778xx families are 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 it is shown in Figure 25. 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/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 TPS777xx or TPS778xx are 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 all low dropout regulators, the TPS777xx and TPS778xx require an output capacitor connected between
OUT and GND to stabilize the internal control loop. The minimum recommended capacitance value is 10 µF
and the ESR (equivalent series resistance) must be between 50 mΩ and 1.5 Ω. Capacitor values 10 µF or larger
are acceptable, provided the ESR is less than 1.5 Ω. Solid tantalum electrolytic, aluminum electrolytic, and
multilayer ceramic capacitors are all suitable, provided they meet the requirements described previously.
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
APPLICATION INFORMATION
external capacitor requirements (continued)
6
7
16
RESET/PG
RESET/
PG
V
I
IN
IN
250 kΩ
14
13
V
OUT
OUT
O
C1
0.1 µF
5
EN
C
+
O
10 µF
GND
3
Figure 24. Typical Application Circuit (Fixed Versions)
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 25. The output voltage is calculated using:
R1
R2
(1)
V
V
1
O
ref
Where
V
= 1.1834 V typ (the internal reference voltage)
ref
Resistors R1 and R2 should be chosen for approximately 10-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 = 110 kΩ to set the divider current at approximately 10 µA and then calculate R1 using:
V
O
R1
1
R2
(2)
V
ref
OUTPUT VOLTAGE
PROGRAMMING GUIDE
TPS77x01
RESET/
OUTPUT
VOLTAGE
R1
121
R2
110
UNIT
Reset or PG Output
250 kΩ
V
I
IN
PG
0.1 µF
≤ 0.9 V
2.5 V
3.3 V
kΩ
kΩ
kΩ
kΩ
≥ 1.7 V
196
226
332
110
110
110
EN
OUT
V
O
3.6 V
R1
C
4.75 V
O
FB / NC
GND
R2
Figure 25. TPS77x01 Adjustable LDO Regulator Programming
16
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TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
APPLICATION INFORMATION
reset indicator
The TPS777xx features a RESET 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 RESET output transistor turns on, taking the signal low. The open-drain output requires
a pullup resistor. If not used, it can be left floating. RESET can be used to drive power-on reset circuitry or as
a low-battery indicator. RESET does not assert itself when the regulated output voltage falls outside the
specified 2% tolerance, but instead reports an output voltage low relative to its nominal regulated value (refer
to timing diagram for start-up sequence).
power-good indicator
The TPS778xx 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
TheTPS777xxandTPS778xxPMOS-passtransistorshaveabuilt-inbackdiodethatconductsreversecurrents
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 TPS777xx and TPS778xx also feature internal current limiting and thermal protection. During normal
operation, the TPS777xx and TPS778xx limit output current to approximately 1.7 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.
17
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TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
APPLICATION INFORMATION
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, P
, and the actual dissipation, P , which must be less than
D(max)
D
or equal to P
.
D(max)
The maximum-power-dissipation limit is determined using the following equation:
T max
J
T
A
P
D(max)
R
JA
Where
T max is the maximum allowable junction temperature
J
R
is the thermal resistance junction-to-ambient for the package, i.e., 176°C/W for the 8-terminal
θJA
SOIC and 32.6°C/W for the 20-terminal PWP with no airflow.
T is the ambient temperature.
A
The regulator dissipation is calculated using:
P
V
V
I
D
I
O
O
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the
thermal protection circuit.
18
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TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
MECHANICAL DATA
D (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
PINS **
0.050 (1,27)
8
14
16
DIM
0.020 (0,51)
0.014 (0,35)
0.010 (0,25)
0.197
(5,00)
0.344
(8,75)
0.394
(10,00)
M
A MAX
14
8
0.189
(4,80)
0.337
(8,55)
0.386
(9,80)
A MIN
0.244 (6,20)
0.228 (5,80)
0.008 (0,20) NOM
0.157 (4,00)
0.150 (3,81)
Gage Plane
1
7
A
0.010 (0,25)
0°–8°
0.044 (1,12)
0.016 (0,40)
Seating Plane
0.004 (0,10)
0.010 (0,25)
0.004 (0,10)
0.069 (1,75) MAX
4040047/B 03/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
D. Four center pins are connected to die mount pad.
E. Falls within JEDEC MS-012
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT
TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT
FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999
MECHANICAL DATA
PWP (R-PDSO-G**)
PowerPAD PLASTIC SMALL-OUTLINE PACKAGE
20-PIN SHOWN
0,30
0,19
0,65
20
M
0,10
11
Thermal Pad
(See Note D)
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
1
10
0,25
A
0°–8°
0,75
0,50
Seating Plane
0,10
0,15
0,05
1,20 MAX
PINS **
14
16
20
24
28
DIM
5,10
4,90
5,10
4,90
6,60
6,40
7,90
7,70
9,80
9,60
A MAX
A MIN
4073225/E 03/97
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusions.
D. Thepackagethermalperformancemaybeenhancedbybondingthethermalpadtoanexternalthermalplane.Thispadiselectrically
and thermally connected to the backside of the die and possibly selected leads.
E. Falls within JEDEC MO-153
PowerPAD is a trademark of Texas Instruments Incorporated.
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
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