TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
D Qualified for Automotive Applications
D ESD Protection Exceeds 2000 V Per
D
D
D
D
D
D
D
D
D
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
1-A 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 Down to 230 mV at 1 A
(TPS76850)
Ultralow 85-µA Typical Quiescent Current
Fast Transient Response
2% Tolerance Over Specified Conditions for
Fixed-Output Versions
Open-Drain Power Good (See TPS767xx for
Power-On Reset With 200-ms Delay Option)
20-Pin TSSOP (PWP) Package
Thermal Shutdown Protection
PWP PACKAGE
(TOP VIEW)
GND/HSINK
GND/HSINK
GND
NC
EN
IN
IN
NC
GND/HSINK
GND/HSINK
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
GND/HSINK
GND/HSINK
NC
NC
PG
FB/NC
OUT
OUT
GND/HSINK
GND/HSINK
NC − No internal connection
description
This device is designed to have a fast transient response and be stable with 10-µF low ESR capacitors. 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 1 A for the TPS76850) 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 1 A). 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 at TJ = 25°C.
Power good (PG) is an active high output, which can be used to implement a power-on reset or a low-battery
indicator.
The TPS768xx 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 1.2 V to 5.5 V). Output voltage tolerance is specified
as a maximum of 2% over line, load, and temperature ranges. The TPS768xx family is available in a 20-pin PWP
package.
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 2008, 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
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
description (continued)
TPS76833
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
LOAD TRANSIENT RESPONSE
103
∆ VO − Change in
Output Voltage − mV
100
102
101
I O − Output Current − A
VDO − Dropout Voltage − mV
IO = 1 A
IO = 10 mA
100
10−1
IO = 0
Co = 10 µF
10−2
−60 −40 −20
0
20
40
60
80 100 120 140
Co = 10 µF
TA = 25°C
50
0
−50
−100
1
0.5
0
0
TA − Free-Air Temperature − °C
100 200 300 400 500 600 700 800 900 1000
t − Time − µs
ORDERING INFORMATION{
TJ
OUTPUT
VOLTAGE
(V)
PACKAGE}
ORDERABLE PART
NUMBER
TOP-SIDE
MARKING
TYP
−40°C to 125°C
5.0
TPS76850QPWPRQ1
76850Q1
3.3
TPS76833QPWPRQ1
76833Q1
3.0
TPS76830QPWPRQ1§
76830Q1§
2.8
TPS76828QPWPRQ1§
76828Q1§
2.7
TPS76827QPWPRQ1§
76827Q1§
2.5
TPS76825QPWPRQ1
76825Q1
1.8
TPS76818QPWPRQ1
76818Q1
1.5
TPS76815QPWPRQ1
76815Q1
Adjustable
1.2 V to 5.5 V
TPS76801QPWPRQ1
76801Q1
TSSOP - PWP
Tape and reel
†
For the most current package and ordering information, see the Package Option Addendum at the end of this document,
or see the TI web site at http://www.ti.com.
‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
§ This device is Product Preview.
The TPS76801 is programmable using an external resistor divider (see application information). The PWP package is
available taped and reeled. Note R suffix to the device type (e.g., TPS76801QPWPRQ1).
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
description (continued)
TPS768xx
6
VI
IN
PG
16
PG
7
IN
OUT
5
0.1 µF
OUT
EN
14
VO
13
+
GND
Co†
10 µF
3
†
See application information section for capacitor selection details.
Figure 1. Typical Application Configuration (For Fixed Output Options)
functional block diagram—adjustable version
IN
EN
PG
_
+
OUT
+
_
R1
Vref = 1.1834 V
FB/NC
R2
GND
External to the device
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
functional block diagram—fixed-voltage version
IN
EN
PG
_
+
OUT
+
_
R1
Vref = 1.1834 V
R2
GND
Terminal Functions
PWP Package
TERMINAL
NAME
NO.
I/O
DESCRIPTION
GND/HSINK
1
Ground/heatsink
GND/HSINK
2
Ground/heatsink
GND
3
LDO ground
NC
4
No connect
EN
5
I
Enable input
IN
6
I
Input
IN
7
I
Input
NC
8
No connect
GND/HSINK
9
Ground/heatsink
GND/HSINK
10
Ground/heatsink
GND/HSINK
11
Ground/heatsink
GND/HSINK
12
Ground/heatsink
OUT
13
O
Regulated output voltage
OUT
14
O
Regulated output voltage
FB/NC
15
I
Feedback input voltage for adjustable device (no connect for fixed options)
PG
16
O
PG output
NC
17
No connect
NC
18
No connect
GND/HSINK
19
Ground/heatsink
GND/HSINK
20
Ground/heatsink
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Input voltage range‡, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 13.5 V
Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VI + 0.3 V
Maximum PG voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating tables
Output voltage, VO (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Thermal impedance, Junction-to-Air, ΘJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.55°C/W
Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 150°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.
recommended operating conditions
MIN
Input voltage,
VI§
Output voltage range, VO
Output current, IO (see Note 1)
Operating virtual junction temperature, TJ (see Note 1)
MAX
UNIT
2.7
10
V
1.2
5.5
V
0
1.0
A
−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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
electrical characteristics over recommended operating free-air temperature range,
VI = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, Co = 10 µF (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TPS76801
TPS76815
TPS76818
TPS76825
Output voltage
(10 µA to 1 A load)
(see Note 2)
TPS76827
TPS76828
TPS76830
MIN
5.5 V ≥ VO ≥ 1.5 V,
TJ = 25°C
5.5 V ≥ VO ≥ 1.5 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 V < VIN < 10 V
TJ = −40°C to 125°C,
4 V < VIN < 10 V
4.3 V < VIN < 10 V
TJ = −40°C to 125°C,
4.3 V < VIN < 10 V
TJ = 25°C,
6 V < VIN < 10 V
TJ = −40°C to 125°C,
6 V < VIN < 10 V
Quiescent current (GND current)
EN = 0V, (see Note 2)
10 µA < IO < 1 A,
TJ = 25°C
IO = 1 A,
TJ = −40°C to 125°C
Output voltage line regulation (∆VO/VO)
(see Notes 2 and 3)
VO + 1 V < VI ≤ 10 V,
TJ = 25°C
TPS76850
MAX
UNIT
VO
TJ = 25°C,
TPS76833
TYP
0.98VO
1.02VO
1.5
1.470
1.530
1.8
1.764
1.836
2.5
2.450
2.550
2.7
2.646
2.754
V
2.8
2.744
2.856
3.0
2.940
3.060
3.3
3.234
3.366
5.0
4.900
5.100
85
125
Load regulation
µA
A
0.01
%/V
3
mV
Output noise voltage (TPS76818)
BW = 200 Hz to 100 kHz,
Co = 10 µF, IC = 1 A, TJ = 25°C
55
µVrms
Output current limit
VO = 0 V
1.7
Thermal shutdown junction temperature
Standby current
FB input current
TPS76801
EN = VI,
2.7 V < VI < 10 V
TJ = 25°C,
EN = VI,
2.7 V < VI < 10 V
TJ = −40°C to 125°C
°C
1
µA
2
V
0.9
Power supply ripple rejection (see Note 2)
Co = 10 µF,
60
NOTES: 2. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V.
3. If VO ≤ 1.8 V then VImax = 10 V, VImin = 2.7 V:
Line Reg. (mV) + ǒ%ńVǓ
V
O
ǒVImax * 2.7 VǓ
100
If VO ≥ 2.5 V then VImax = 10 V, VImin = VO + 1 V:
Line Reg. (mV) + ǒ%ńVǓ
V
O
1000
ǒVImax * ǒVO ) 1 VǓǓ
POST OFFICE BOX 655303
100
• DALLAS, TEXAS 75265
1000
µA
nA
1.7
Low level enable input voltage
f = 1 KHz,
TJ = 25°C
A
150
10
FB = 1.5 V
High level enable input voltage
6
2
V
dB
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
electrical characteristics over recommended operating free-air temperature range,
VI = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, Co = 10 µF (unless otherwise noted) (continued)
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)
TPS76828
TPS76830
Dropout voltage
(see Note 4)
TPS76833
TPS76850
MIN
TYP
MAX
UNIT
98
%VO
1.1
92
V
0.5
IO(PG) = 1 mA
0.15
EN = 0 V
−1
EN = VI
−1
IO = 1 A,
TJ = 25°C
IO = 1 A,
TJ = −40°C to 125°C
IO = 1 A,
TJ = 25°C
IO = 1 A,
TJ = −40°C to 125°C
IO = 1 A,
TJ = 25°C
IO = 1 A,
TJ = −40°C to 125°C
IO = 1 A,
TJ = 25°C
IO = 1 A,
TJ = −40°C to 125°C
0
%VO
0.4
V
1
µA
1
µA
A
1
500
825
450
675
mV
350
575
230
380
NOTE 4: IN voltage equals VO(typ) − 100 mV; TPS76801 output voltage set to 3.3 V nominal with external resistor divider. TPS76815, TPS76818,
TPS76825, and TPS76827 dropout voltage limited by input voltage range limitations (i.e., TPS76830 input voltage needs to drop to
2.9 V for purpose of this test).
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
VO
Output voltage
vs Output current
2, 3, 4
vs Free-air temperature
5, 6, 7
Ground current
vs Free-air temperature
8, 9
Power supply ripple rejection
vs Frequency
10
Output spectral noise density
vs Frequency
11
Input voltage (min)
vs Output voltage
12
Zo
Output impedance
vs Frequency
13
VDO
Dropout voltage
vs Free-air temperature
Line transient response
Load transient response
VO
14
15, 17
16, 18
Output voltage
vs Time
Dropout voltage
vs Input voltage
Equivalent series resistance (ESR)
vs Output current
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
19
20
22 − 25
7
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
TPS76815
TPS76833
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
1.4985
3.2835
VI = 4.3 V
TA = 25°C
1.4980
VO − Output Voltage − V
VO − Output Voltage − V
3.2830
VI = 2.7 V
TA = 25°C
3.2825
3.2820
3.2815
3.2810
1.4975
1.4970
1.4965
1.4960
1.4955
3.2805
1.4950
3.2800
0
0.1
0.2 0.3 0.4 0.5 0.6 0.7 0.8
IO − Output Current − A
0.9
0
1
0.1
0.2 0.3
Figure 2
0.6 0.7
0.8
TPS76825
TPS76833
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
0.9
1
3.32
VI = 3.5 V
TA = 25°C
2.4955
VI = 4.3 V
3.31
VO − Output Voltage − V
2.4950
VO − Output Voltage − V
0.5
Figure 3
2.4960
2.4945
2.4940
2.4935
2.4930
3.30
3.29
IO = 1 A
IO = 1 mA
3.28
3.27
3.26
2.4925
2.4920
0
0.1 0.2 0.3
0.4 0.5
0.6 0.7
0.8 0.9
1
3.25
−60 −40 −20
0
20
40
Figure 4
Figure 5
POST OFFICE BOX 655303
60
80
100 120 140
TA − Free-Air Temperature − °C
IO − Output Current − A
8
0.4
IO − Output Current − A
• DALLAS, TEXAS 75265
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
TPS76815
TPS76825
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
1.515
2.515
VI = 3.5 V
VI = 2.7 V
2.510
VO − Output Voltage − V
1.505
1.500
IO = 1 A
IO = 1 mA
1.495
1.490
2.505
2.500
IO = 1 A
2.495
IO = 1 mA
2.490
2.485
1.485
−60 −40 −20
0
20
40
60
80
2.480
−60 −40
100 120 140
TA − Free-Air Temperature − °C
−20
0
20
40
60
80
100 120
TA − Free-Air Temperature − °C
Figure 6
Figure 7
TPS76833
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
92
90
VI = 4.3 V
88
Ground Current − µ A
VO − Output Voltage − V
1.510
86
84
82
IO = 1 mA
80
IO = 1 A
78
IO = 500 mA
76
74
72
−60 −40 −20
0
20
40
60
80
100 120 140
TA − Free-Air Temperature − °C
Figure 8
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
9
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
TPS76815
TPS76833
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
POWER SUPPLY RIPPLE REJECTION
vs
FREQUENCY
90
PSRR − Power Supply Ripple Rejection − dB
100
VI = 2.7 V
Ground Current − µ A
95
90
IO = 1 A
IO = 1 mA
85
IO = 500 mA
80
75
−60 −40 −20
0
20
40
60
80
70
60
50
40
30
20
10
0
−10
10
100 120 140
VI = 4.3 V
Co = 10 µF
IO = 1 A
TA = 25°C
80
100
TA − Free-Air Temperature − °C
Figure 9
Figure 10
TPS76833
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
Output Spectral Noise Density − µV Hz
10−5
VI = 4.3 V
Co = 10 µF
TA = 25°C
IO = 7 mA
10−6
IO = 1 A
10−7
10−8
102
103
104
f − Frequency − Hz
Figure 11
10
1k
10k
f − Frequency − Hz
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
105
100k
1M
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
INPUT VOLTAGE (MIN)
vs
OUTPUT VOLTAGE
4
IO = 1 A
VI − Input Voltage (Min) − V
TA = 25°C
TA = 125°C
3
TA = −40°C
2.7
2
1.5
1.75
2
3
2.25 2.5 2.75
VO − Output Voltage − V
3.25
3.5
Figure 12
TPS76833
TPS76833
OUTPUT IMPEDANCE
vs
FREQUENCY
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
103
0
IO = 1 A
VDO − Dropout Voltage − mV
Zo − Output Impedance − Ω
VI = 4.3 V
Co = 10 µF
TA = 25°C
IO = 1 mA
10−1
IO = 1 A
102
101
IO = 10 mA
100
10−1
IO = 0
Co = 10 µF
10−2
101
102
103
104
f − Frequency − kHz
105
106
10−2
−60 −40 −20
0
20
40
60
80 100 120 140
TA − Free-Air Temperature − °C
Figure 13
Figure 14
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• DALLAS, TEXAS 75265
11
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
TPS76815
TPS76815
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
∆ VO − Change in
Output Voltage − mV
VI − Input Voltage − V
100
3.7
2.7
Co = 10 µF
TA = 25°C
50
0
−50
I O − Output Current − A
∆ VO − Change in
Output Voltage − mV
−100
10
0
−10
Co = 10 µF
TA = 25°C
0
20
40
60
1
0.5
0
0
80 100 120 140 160 180 200
t − Time − µs
100 200 300 400 500 600 700 800 900 1000
t − Time − µs
Figure 16
TPS76833
TPS76833
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
100
∆ VO − Change in
Output Voltage − mV
VI − Input Voltage − V
Figure 15
Co = 10 µF
TA = 25°C
5.3
I O − Output Current − A
∆ VO − Change in
Output Voltage − mV
4.3
10
0
−10
0
20
40
60
80 100 120 140 160 180 200
t − Time − µs
Co = 10 µF
TA = 25°C
50
0
−50
−100
1
0.5
0
0
100 200 300 400 500 600 700 800 900 1000
t − Time − µs
Figure 18
Figure 17
12
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
TPS76833
TPS76801
OUTPUT VOLTAGE
vs
TIME (AT STARTUP)
DROPOUT VOLTAGE
vs
INPUT VOLTAGE
900
IO = 1 A
Co = 10 µF
IO = 1 A
TA = 25°C
3
800
VDO − Dropout Voltage − mV
VO− Output Voltage − V
4
2
1
Enable Pulse − V
0
700
600
500
TA = 25°C
400
TA = 125°C
300
200
TA = −40°C
100
0
0
0.1
0.2 0.3
0.4 0.5 0.6 0.7 0.8
t − Time − ms
0.9
1
2.5
3.5
4
VI − Input Voltage − V
4.5
5
Figure 20
Figure 19
VI
3
To Load
IN
OUT
+
EN
Co
GND
RL
ESR
Figure 21. Test Circuit for Typical Regions of Stability (Figures 22 through 25) (Fixed Output Options)
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
13
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
TYPICAL CHARACTERISTICS
TYPICAL REGION OF STABILITY
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
10
ESR − Equivalent Series Resistance − Ω
ESR − Equivalent Series Resistance − Ω
10
Region of Instability
1
Region of Stability
VO = 3.3 V
Co = 4.7 µF
VI = 4.3 V
TA = 25°C
0.1
0
200
400
600
800
Region of Instability
VO = 3.3 V
Co = 4.7 µF
VI = 4.3 V
TJ = 125°C
1
Region of Stability
0.1
1000
0
200
IO − Output Current − mA
400
Figure 22
TYPICAL REGION OF STABILITY
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
EQUIVALENT SERIES RESISTANCE†
vs
OUTPUT CURRENT
ESR − Equivalent Series Resistance − Ω
ESR − Equivalent Series Resistance − Ω
1000
10
Region of Instability
1
Region of Stability
VO = 3.3 V
Co = 22 µF
VI = 4.3 V
TA = 25°C
0.1
0
200
400
600
800
1000
Region of Instability
VO = 3.3 V
Co= 22 µF
VI = 4.3 V
TJ = 125°C
1
Region of Stability
0.1
0
IO − Output Current − mA
200
400
600
800
1000
IO − Output Current − mA
Figure 24
14
800
Figure 23
10
†
600
IO − Output Current − mA
Figure 25
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.
POST OFFICE BOX 655303
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TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
APPLICATION INFORMATION
The TPS768xx 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 offers an adjustable device, the TPS76801 (adjustable from 1.2 V to 5.5 V).
device operation
The TPS768xx features 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 (IB = IC/β). The TPS768xx 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 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
TPS768xx quiescent current remains low even when the regulator drops out, eliminating both problems.
The TPS768xx 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 2 µA. If the shutdown
feature is not used, EN should be tied to ground.
minimum load requirements
The TPS768xx 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 27. 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 TPS768xx 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 all low dropout regulators, the TPS768xx requires 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 above. Most of
the commercially available 10 µF surface-mount ceramic capacitors, including devices from Sprague and
Kemet, meet the ESR requirements stated above.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
15
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
APPLICATION INFORMATION
external capacitor requirements (continued)
TPS768xx
6
VI
7
IN
PG
5
PG
250 kΩ
IN
OUT
C1
0.1 µF
16
OUT
EN
14
VO
13
Co
+
10 µF
GND
3
Figure 26. Typical Application Circuit (Fixed Versions)
programming the TPS76801 adjustable LDO regulator
The output voltage of the TPS76801 adjustable regulator is programmed using an external resistor divider as
shown in Figure 27. 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
TPS76801
VI
0.1 µF
IN
PG
PG
250 kΩ
≥ 1.7 V
≤ 0.9 V
OUTPUT
VOLTAGE
EN
OUT
VO
R1
FB / NC
GND
R1
R2
UNIT
2.5 V
33.2
30.1
kΩ
3.3 V
53.6
30.1
kΩ
3.6 V
61.9
30.1
kΩ
4.75 V
90.8
30.1
kΩ
R2
Figure 27. TPS76801 Adjustable LDO Regulator Programming
16
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1
TPS76828-Q1, TPS76830-Q1 TPS76833-Q1, TPS76850-Q1, TPS76801-Q1
FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS155A − FEBRUARY 2003 − REVISED SEPTEMBER 2008
APPLICATION INFORMATION
power-good indicator
The TPS768xx 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. PG does not assert itself when the regulated output voltage falls out of the specified 2%
tolerance, but instead reports an output voltage low, relative to its nominal regulated value.
regulator protection
The TPS768xx 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 TPS768xx also features internal current limiting and thermal protection. During normal operation, the
TPS768xx limits 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.
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
T max * T
A
+ J
D(max)
R
qJA
Where:
TJmax is the maximum allowable junction temperature.
RθJA is the thermal resistance junction-to-ambient for the package, i.e., 172°C/W for the 8-terminal
SOIC and 32.6°C/W for the 20-terminal PWP 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.
POST OFFICE BOX 655303
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PACKAGE OPTION ADDENDUM
www.ti.com
24-May-2010
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
Samples
(Requires Login)
TPS76801QPWPRG4Q1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Request Free Samples
TPS76801QPWPRQ1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Contact TI Distributor
or Sales Office
TPS76815QPWPRQ1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Purchase Samples
TPS76818QPWPRQ1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Request Free Samples
TPS76825QPWPRQ1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Purchase Samples
TPS76833QPWPRQ1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Request Free Samples
TPS76850QPWPRQ1
ACTIVE
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-3-260C-168 HR
Request Free 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.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
24-May-2010
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TPS76801-Q1, TPS76815-Q1, TPS76818-Q1, TPS76825-Q1, TPS76827-Q1, TPS76828-Q1, TPS76830-Q1, TPS76833-Q1,
TPS76850-Q1 :
• Catalog: TPS76801, TPS76815, TPS76818, TPS76825, TPS76827, TPS76828, TPS76830, TPS76833, TPS76850
• Enhanced Product: TPS76801-EP, TPS76815-EP, TPS76818-EP, TPS76825-EP, TPS76833-EP, TPS76850-EP
NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
• Enhanced Product - Supports Defense, Aerospace and Medical Applications
Addendum-Page 2
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