TPS7101YPW [TI]

LOW-DROPOUT VOLTAGE REGULATORS; 低压差稳压器
TPS7101YPW
型号: TPS7101YPW
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

LOW-DROPOUT VOLTAGE REGULATORS
低压差稳压器

稳压器
文件: 总33页 (文件大小:542K)
中文:  中文翻译
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TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
D OR P PACKAGE  
(TOP VIEW)  
Available in 5-V, 4.85-V, and 3.3-V  
Fixed-Output and Adjustable Versions  
Very Low-Dropout Voltage . . . Maximum of  
GND  
EN  
IN  
PG  
1
2
3
4
8
7
6
5
32 mV at I = 100 mA (TPS7150)  
O
SENSE /FB  
OUT  
Very Low Quiescent Current – Independent  
of Load . . . 285 µA Typ  
IN  
OUT  
Extremely Low Sleep-State Current  
0.5 µA Max  
PW PACKAGE  
(TOP VIEW)  
2% Tolerance Over Specified Conditions  
For Fixed-Output Versions  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
GND  
GND  
GND  
NC  
NC  
EN  
PG  
NC  
NC  
Output Current Range of 0 mA to 500 mA  
TSSOP Package Option Offers Reduced  
Component Height for Space-Critical  
Applications  
FB  
NC  
Power-Good (PG) Status Output  
SENSE  
NC  
IN  
OUT  
OUT  
NC  
description  
IN  
The TPS71xx integrated circuits are a family  
of micropower low-dropout (LDO) voltage  
regulators. An order of magnitude reduction in  
dropout voltage and quiescent current over  
conventional LDO performance is achieved by  
replacing the typical pnp pass transistor with a  
PMOS device.  
IN  
NC  
NC – No internal connection  
SENSE – Fixed voltage options only  
(TPS7133, TPS7148, and TPS7150)  
FB – Adjustable version only (TPS7101)  
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (maximum of 32  
mV at an output current of 100 mA for the TPS7150) and is directly proportional to the output current (see  
Figure 1). Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very  
low and remains independent of output loading (typically 285 µA over the full range of output current, 0 mA to  
500 mA). These two key specifications yield a significant improvement in operating life for battery-powered  
systems. The LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down  
the regulator, reducing the quiescent current to 0.5 µA maximum at T = 25°C.  
J
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 1997, 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  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
description (continued)  
0.25  
T
A
= 25°C  
0.2  
0.15  
0.1  
TPS7133  
TPS7148  
TPS7150  
0.05  
0
0
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5  
– Output Current – A  
I
O
Figure 1. Dropout Voltage Versus Output Current  
Power good (PG) reports low output voltage and can be used to implement a power-on reset or a low-battery  
indicator.  
The TPS71xx is offered in 3.3-V, 4.85-V, and 5-V fixed-voltage versions and in an adjustable version  
(programmable over the range of 1.2 V to 9.75 V). Output voltage tolerance is specified as a maximum of 2%  
over line, load, and temperature ranges (3% for adjustable version). The TPS71xx family is available in PDIP  
(8 pin), SO (8 pin), and TSSOP (20-pin) packages. The TSSOP has a maximum height of 1.2 mm.  
AVAILABLE OPTIONS  
OUTPUT VOLTAGE  
PACKAGED DEVICES  
(V)  
CHIP FORM  
T
J
(Y)  
SMALL OUTLINE  
(D)  
PLASTIC DIP  
(P)  
TSSOP  
(PW)  
MIN  
TYP  
MAX  
4.9  
4.75  
3.23  
5
4.85  
3.3  
5.1  
4.95  
3.37  
TPS7150QD  
TPS7148QD  
TPS7133QD  
TPS7150QP  
TPS7148QP  
TPS7133QP  
TPS7150QPW  
TPS7148QPW  
TPS7133QPW  
TPS7150Y  
TPS7148Y  
TPS7133Y  
40°C to 125°C  
Adjustable  
1.2 V to 9.75 V  
TPS7101QD  
TPS7101QP  
TPS7101QPW  
TPS7101Y  
The D and PW packages are available taped and reeled. Add R suffix to device type (e.g., TPS7150QDR). The TPS7101Q is  
programmable using an external resistor divider (see application information). The chip form is tested at 25°C.  
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TPS71xx  
8
20  
15  
14  
13  
V
IN  
PG  
PG  
I
9
IN  
IN  
SENSE  
OUT  
10  
V
O
6
0.1 µF  
EN  
OUT  
C
O
+
10 µF  
GND  
1
2
3
CSR  
TPS7133, TPS7148, TPS7150 (fixed-voltage options)  
Capacitor selection is nontrivial. See application information section  
for details.  
Figure 2. Typical Application Configuration  
TPS71xx chip information  
These chips, when properly assembled, display characteristics similar to the TPS71xxQ. Thermal compression  
or ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with  
conductive epoxy or a gold-silicon preform.  
BONDING PAD ASSIGNMENTS  
(5)  
(6)  
§
SENSE  
(3)  
(2)  
IN  
FB  
(4)  
(5)  
(6)  
TPS71xx  
(4)  
(7)  
OUT  
PG  
EN  
(1)  
(7)  
GND  
CHIP THICKNESS: 15 MILS TYPICAL  
80  
BONDING PADS: 4 × 4 MILS MINIMUM  
T max = 150°C  
J
TOLERANCES ARE ±10%.  
ALL DIMENSIONS ARE IN MILS.  
§
SENSE – Fixed voltage options only (TPS7133, TPS7148,  
and TPS7150)  
FB – Adjustable version only (TPS7101)  
(3)  
(2)  
(1)  
NOTE A: For most applications, OUT and SENSE should  
betiedtogetherascloseaspossibletothedevice;  
for other implementations, refer to SENSE-pin  
connection discussion in the Applications  
Information section of this data sheet.  
92  
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
functional block diagram  
IN  
EN  
RESISTOR DIVIDER OPTIONS  
DEVICE  
R1  
R2  
UNIT  
TPS7101  
TPS7133  
TPS7148  
TPS7150  
0
420  
726  
756  
233  
233  
233  
kΩ  
kΩ  
kΩ  
PG  
_
+
NOTE A: Resistors are nominal values only.  
OUT  
COMPONENT COUNT  
1.12 V  
SENSE /FB  
MOS transistors  
Bilpolar transistors  
Diodes  
464  
41  
4
+
_
R1  
R2  
V
ref  
= 1.178 V  
Capacitors  
17  
76  
Resistors  
GND  
Switch positions are shown with EN low (active).  
For most applications, SENSE should be externally connected to OUT as close as possible to the device. For other implementations, refer to  
SENSE-pin connection discussion in Applications Information section.  
§
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)  
Input voltage range , V , PG, SENSE, EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 11 V  
I
Output current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A  
O
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Tables 1 and 2  
Operating virtual junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 150°C  
J
Storage temperature range, T  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C  
stg  
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C  
§
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 TEMPERATURE (see Figure 3)  
T
25°C  
DERATING FACTOR  
T
= 70°C  
T = 125°C  
A
A
A
PACKAGE  
POWER RATING  
ABOVE T = 25°C  
POWER RATING POWER RATING  
A
D
P
PW  
725 mW  
1175 mW  
700 mW  
5.8 mW/°C  
9.4 mW/°C  
5.6 mW/°C  
464 mW  
752 mW  
448 mW  
145 mW  
235 mW  
140 mW  
||  
#
DISSIPATION RATING TABLE 2 – CASE TEMPERATURE (see Figure 4)  
T
25°C DERATING FACTOR = 70°C  
T
T
= 125°C  
C
C
C
PACKAGE  
POWER RATING  
ABOVE T = 25°C  
POWER RATING POWER RATING  
C
D
P
PW  
2188 mW  
2738 mW  
4025 mW  
17.5 mW/°C  
21.9 mW/°C  
32.2 mW/°C  
1400 mW  
1752 mW  
2576 mW  
438 mW  
548 mW  
805 mW  
||  
#
||  
Dissipation rating tables and figures are provided for maintenance of junction temperature at or below  
absolute maximum temperature of 150°C. For guidelines on maintaining junction temperature within  
recommended operating range, see the Thermal Information section.  
Refer to Thermal Information section for detailed power dissipation considerations when using the TSSOP packages.  
4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
DISSIPATION DERATING CURVE  
vs  
DISSIPATION DERATING CURVE  
vs  
FREE-AIR TEMPERATURE  
CASE TEMPERATURE  
1400  
1200  
4800  
4400  
PW Package  
4000  
3600  
3200  
2800  
2400  
2000  
1600  
1200  
800  
R
= 31°C/W  
θJC  
P Package  
R
= 106°C/W  
1000  
800  
θJA  
P Package  
R
= 46°C/W  
θJC  
D Package  
R
= 172°C/W  
θJA  
600  
400  
200  
0
PW and PWP  
Package  
= 178°C/W  
D Package  
= 57°C/W  
R
θJA  
400  
R
θJC  
0
25  
50  
75  
100  
125  
150  
25  
50  
75  
100  
125  
150  
T
A
– Free-Air Temperature – °C  
T – Case Temperature – °C  
C
Figure 3  
Figure 4  
Dissipation rating tables and figures are provided for maintenance of junction temperature at or below absolute maximum temperature of 150°C.  
For guidelines on maintaining junction temperature within recommended operating range, see the Thermal Information section.  
recommended operating conditions  
MIN  
2.5  
3.77  
5.2  
5.33  
2
MAX  
10  
UNIT  
TPS7101Q  
TPS7133Q  
TPS7148Q  
TPS7150Q  
10  
Input voltage, V  
V
I
10  
10  
High-level input voltage at EN, V  
V
V
IH  
Low-level input voltage at EN, V  
0.5  
500  
125  
IL  
Output current range, I  
0
mA  
°C  
O
Operating virtual junction temperature range, T  
40  
J
Minimum input voltage defined in the recommended operating conditions is the maximum specified output voltage plus dropout voltage at the  
maximum specified load range. Since dropout voltage is a function of output current, the usable range can be extended for lighter loads. To  
calculate the minimum input voltage for your maximum output current, use the following equation: V  
= V  
+ V  
DO(max load)  
I(min)  
O(max)  
beforeapplyingtheaboveequation.Theequationforcalculating  
BecausetheTPS7101isprogrammable,r  
DS(on)  
shouldbeusedtocalculateV  
DO  
V
from r  
is given in Note 2 in the electrical characteristics table. The minimum value of 2.5 V is the absolute lower limit for the  
DO  
DS(on)  
recommended input voltage range for the TPS7101.  
5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
electrical characteristics at I = 10 mA, EN = 0 V, C = 4.7 µF/CSR = 1 , SENSE/FB shorted to OUT  
O
O
(unless otherwise noted)  
TPS7101Q, TPS7133Q  
TPS7148Q, TPS7150Q  
PARAMETER  
T
J
UNIT  
TEST CONDITIONS  
MIN  
TYP  
MAX  
350  
460  
0.5  
2
25°C  
40°C to 125°C  
25°C  
285  
EN 0.5 V,  
V = V + 1 V,  
I O  
Ground current (active mode)  
Input current (standby mode)  
Output current limit  
µA  
µA  
A
0 mA I 500 mA  
O
EN = V ,  
2.7 V V 10 V  
I
I
40°C to 125°C  
25°C  
1.2  
2
V
O
= 0,  
V = 10 V  
I
40°C to 125°C  
25°C  
2
0.5  
1
Pass-element leakage current in standby  
mode  
µA  
µA  
EN = V ,  
I
2.7 V V 10 V  
I
40°C to 125°C  
25°C  
0.02  
0.5  
0.5  
Normal operation,  
V
PG  
= 10 V  
PG leakage current  
40°C to 125°C  
40°C to 125°C  
Output voltage temperature coefficient  
Thermal shutdown junction temperature  
61  
75 ppm/°C  
°C  
165  
2.5 V V 6 V  
2
I
40°C to 125°C  
V
EN logic high (standby mode)  
6 V V 10 V  
2.7  
I
25°C  
40°C to 125°C  
25°C  
0.5  
V
2.7 V V 10 V  
EN logic low (active mode)  
EN hysteresis voltage  
I
0.5  
50  
mV  
25°C  
0.5  
0.5  
0.5  
µA  
0.5  
0 V V 10 V  
0 V V 10 V  
I
EN input current  
I
40°C to 125°C  
25°C  
2.05  
1.06  
2.5  
V
Minimum V for active pass element  
I
40°C to 125°C  
25°C  
2.5  
1.5  
V
Minimum V for valid PG  
I
= 300 µA  
I
= 300 µA  
I
PG  
PG  
40°C to 125°C  
1.9  
CSR (compensation series resistance) refers to the total series resistance, including the equivalent series resistance (ESR) of the capacitor, any  
series resistance added externally, and PWB trace resistance to C .  
O
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
6
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TPS7101 electrical characteristics at I = 10 mA, V = 3.5 V, EN = 0 V, C = 4.7 µF/CSR = 1 , FB  
shorted to OUT at device leads (unless otherwise noted)  
O
I
O
TPS7101Q  
T
PARAMETER  
UNIT  
V
TEST CONDITIONS  
J
MIN  
TYP  
MAX  
V = 3.5 V,  
I
O
= 10 mA  
25°C  
1.178  
I
Reference voltage (measured at FB  
with OUT connected to FB)  
2.5 V V 10 V,  
5 mA I 500 mA,  
O
I
40°C to 125°C 1.143  
40°C to 125°C  
1.213  
V
See Note 1  
Reference voltage temperature  
coefficient  
61  
75 ppm/°C  
25°C  
40°C to 125°C  
25°C  
0.7  
1
1
V = 2.4 V,  
50 µA I 150 mA  
O
I
0.83  
0.52  
1.3  
150 mA I 500  
O
V = 2.4 V,  
I
mA  
40°C to 125°C  
25°C  
1.3  
Pass-element series resistance  
(see Note 2)  
0.85  
V = 2.9 V,  
I
50 µA I 500 mA  
O
40°C to 125°C  
25°C  
0.85  
V = 3.9 V,  
I
50 µA I 500 mA  
0.32  
0.23  
O
V = 5.9 V,  
I
50 µA I 500 mA  
25°C  
O
25°C  
18  
25  
14  
25  
22  
54  
V = 2.5 V to 10 V,  
I
50 µA I 500 mA,  
O
Input regulation  
mV  
mV  
mV  
See Note 1  
40°C to 125°C  
25°C  
I
= 5 mA to 500 mA, 2.5 V V 10 V,  
I
O
See Note 1  
40°C to 125°C  
25°C  
Output regulation  
I
O
= 50 µA to 500 mA, 2.5 V V 10 V,  
I
See Note 1  
f = 120 Hz  
40°C to 125°C  
25°C  
40°C to 125°C  
25°C  
48  
44  
45  
44  
59  
54  
I
I
= 50 µA  
O
Ripple rejection  
dB  
= 500 mA,  
O
See Note 1  
40°C to 125°C  
25°C  
Output noise-spectral density  
Output noise voltage  
f = 120 Hz  
2
95  
89  
74  
µV/Hz  
µVrms  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
25°C  
O
O
O
10 Hz f 100 kHz,  
25°C  
CSR = 1 Ω  
25°C  
§
V
FB  
voltage decreasing from above V  
PG  
40°C to 125°C 1.101  
1.145  
V
PG trip-threshold voltage  
§
25°C  
25°C  
12  
mV  
Measured at V  
PG hysteresis voltage  
FB  
0.1  
0.4  
0.4  
10  
§
I
= 400 µA,  
V = 2.13 V  
I
V
PG output low voltage  
PG  
40°C to 125°C  
25°C  
10  
20  
0.1  
FB input current  
nA  
40°C to 125°C  
20  
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
§
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).  
NOTES: 1. When V < 2.9 V and I > 150 mA simultaneously, pass element r  
increases (see Figure 27) to a point such that the resulting  
I
O
DS(on)  
dropout voltage prevents the regulator from maintaining the specified tolerance range.  
2. To calculate dropout voltage, use equation:  
V
DO  
= I  
r
O
DS(on)  
r
is a function of both output current and input voltage. The parametric table lists r  
for V = 2.4 V, 2.9 V, 3.9 V, and  
I
DS(on)  
DS(on)  
5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V, respectively. For other  
programmed values, refer to Figure 26.  
7
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TPS7133 electrical characteristics at I = 10 mA, V = 4.3 V, EN = 0 V, C = 4.7 µF/CSR = 1 , SENSE  
shorted to OUT (unless otherwise noted)  
O
I
O
TPS7133Q  
T
J
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
TYP  
MAX  
V = 4.3 V,  
I
= 10 mA  
25°C  
3.3  
I
O
Output voltage  
V
4.3 V V 10 V,  
5 mA I 500 mA 40°C to 125°C  
3.23  
3.37  
7
I
O
25°C  
4.5  
47  
I
O
I
O
I
O
= 10 mA,  
= 100 mA,  
= 500 mA,  
V = 3.23 V  
I
40°C to 125°C  
25°C  
8
60  
V = 3.23 V  
I
mV  
Dropout voltage  
40°C to 125°C  
25°C  
80  
235  
0.47  
300  
400  
0.6  
0.8  
20  
V = 3.23 V  
I
40°C to 125°C  
25°C  
(3.23 V – V )/I ,  
V = 3.23 V,  
I
O
O
Pass-element series resistance  
Input regulation  
I
O
= 500 mA  
40°C to 125°C  
25°C  
V = 4.3 V to 10 V,  
I
50 µA I 500 mA  
mV  
mV  
mV  
O
40°C to 125°C  
25°C  
27  
21  
30  
54  
49  
38  
I
= 5 mA to 500 mA, 4.3 V V 10 V  
I
O
O
40°C to 125°C  
25°C  
75  
Output regulation  
Ripple rejection  
60  
I
= 50 µA to 500 mA, 4.3 V V 10 V  
I
40°C to 125°C  
25°C  
120  
43  
40  
39  
36  
I
I
= 50 µA  
O
40°C to 125°C  
25°C  
f = 120 Hz  
dB  
= 500 mA  
O
40°C to 125°C  
25°C  
Output noise-spectral density  
Output noise voltage  
f = 120 Hz  
2
274  
228  
159  
µV/Hz  
µVrms  
25°C  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
10 Hz f 100 kHz,  
25°C  
CSR = 1 Ω  
25°C  
V
O
voltage decreasing from above V  
PG  
40°C to 125°C 2.868  
25°C  
3
V
PG trip-threshold voltage  
PG hysteresis voltage  
35  
mV  
25°C  
0.22  
0.4  
0.4  
PG output low voltage  
I
= 1 mA,  
V = 2.8 V  
I
V
PG  
40°C to 125°C  
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TPS7148 electrical characteristics at I =10mA, V =5.85V, EN=0V, C =4.7µF/CSR =1,SENSE  
shorted to OUT (unless otherwise noted)  
O
I
O
TPS7148Q  
T
J
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
TYP  
MAX  
V = 5.85 V,  
I
= 10 mA  
25°C  
4.85  
I
O
Output voltage  
V
5.85 V V 10 V,  
5 mA I 500 mA 40°C to 125°C  
4.75  
4.95  
6
I
O
25°C  
2.9  
30  
I
O
I
O
I
O
= 10 mA,  
= 100 mA,  
= 500 mA,  
V = 4.75 V  
I
40°C to 125°C  
25°C  
8
37  
V = 4.75 V  
I
mV  
Dropout voltage  
40°C to 125°C  
25°C  
54  
150  
0.32  
180  
250  
0.35  
0.52  
27  
V = 4.75 V  
I
40°C to 125°C  
25°C  
(4.75 V – V )/I ,  
V = 4.75 V,  
I
O
O
Pass-element series resistance  
Input regulation  
I
O
= 500 mA  
40°C to 125°C  
25°C  
V = 5.85 V to 10 V,  
I
50 µA I 500 mA  
mV  
mV  
mV  
O
40°C to 125°C  
25°C  
37  
12  
42  
53  
50  
42  
I
= 5 mA to 500 mA, 5.85 V V 10 V  
I
O
O
40°C to 125°C  
25°C  
80  
Output regulation  
Ripple rejection  
60  
I
= 50 µA to 500 mA, 5.85 V V 10 V  
I
40°C to 125°C  
25°C  
130  
42  
39  
39  
35  
I
I
= 50 µA  
O
40°C to 125°C  
25°C  
f = 120 Hz  
dB  
= 500 mA  
O
40°C to 125°C  
25°C  
Output noise-spectral density  
Output noise voltage  
f = 120 Hz  
2
410  
328  
212  
µV/Hz  
µVrms  
25°C  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
10 Hz f 100 kHz,  
25°C  
CSR = 1 Ω  
25°C  
V
O
voltage decreasing from above V  
PG  
40°C to 125°C  
25°C  
4.5  
4.7  
V
PG trip-threshold voltage  
PG hysteresis voltage  
50  
mV  
25°C  
0.2  
0.4  
0.4  
I
= 1.2 mA,  
V = 4.12 V  
I
V
PG output low voltage  
PG  
40°C to 125°C  
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TPS7150 electrical characteristics at I = 10 mA, V = 6 V, EN = 0 V, C = 4.7 µF/CSR = 1 , SENSE  
shorted to OUT (unless otherwise noted)  
O
I
O
TPS7150Q  
T
J
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
TYP  
MAX  
V = 6 V,  
I
= 10 mA  
25°C  
5
I
O
Output voltage  
V
6 V V 10 V,  
5 mA I 500 mA 40°C to 125°C  
4.9  
5.1  
6
I
O
25°C  
2.9  
27  
I
O
I
O
I
O
= 10 mA,  
= 100 mA,  
= 500 mA,  
V = 4.88 V  
I
40°C to 125°C  
25°C  
8
32  
V = 4.88 V  
I
mV  
Dropout voltage  
40°C to 125°C  
25°C  
47  
146  
0.29  
170  
230  
0.32  
0.47  
25  
V = 4.88 V  
I
40°C to 125°C  
25°C  
(4.88 V – V )/I ,  
V = 4.88 V,  
I
O
O
Pass-element series resistance  
Input regulation  
I
O
= 500 mA  
40°C to 125°C  
25°C  
V = 6 V to 10 V,  
I
50 µA I 500 mA  
mV  
mV  
mV  
O
40°C to 125°C  
25°C  
32  
30  
45  
55  
52  
45  
I
= 5 mA to 500 mA, 6 V V 10 V  
I
O
O
40°C to 125°C  
25°C  
86  
Output regulation  
Ripple rejection  
65  
I
= 50 µA to 500 mA, 6 V V 10 V  
I
40°C to 125°C  
25°C  
140  
45  
40  
42  
36  
I
I
= 50 µA  
O
40°C to 125°C  
25°C  
f = 120 Hz  
dB  
= 500 mA  
O
40°C to 125°C  
25°C  
Output noise-spectral density  
Output noise voltage  
f = 120 Hz  
2
430  
345  
220  
µV/Hz  
µVrms  
25°C  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
10 Hz f 100 kHz,  
25°C  
CSR = 1 Ω  
25°C  
V
O
voltage decreasing from above V  
PG  
40°C to 125°C  
25°C  
4.55  
4.75  
V
PG trip-threshold voltage  
PG hysteresis voltage  
53  
mV  
25°C  
0.2  
0.4  
0.4  
PG output low voltage  
I
= 1.2 mA,  
V = 4.25 V  
I
V
PG  
40°C to 125°C  
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
10  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
electrical characteristics at I = 10 mA, EN = 0 V, C = 4.7 µF/CSR = 1 , T = 25°C, SENSE/FB  
O
O
J
shorted to OUT (unless otherwise noted)  
TPS7101Y, TPS7133Y  
TPS7148Y, TPS7150Y  
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
TYP  
MAX  
EN 0.5 V,  
0 mA I 500 mA  
V = V + 1 V,  
I O  
Ground current (active mode)  
285  
µA  
O
Output current limit  
V
= 0,  
V = 10 V  
1.2  
0.02  
165  
50  
A
µA  
°C  
mV  
V
O
I
Normal operation,  
V
PG  
= 10 V  
PG leakage current  
Thermal shutdown junction temperature  
EN hysteresis voltage  
Minimum V for active pass element  
2.05  
1.06  
I
Minimum V for valid PG  
I
= 300 µA  
V
I
PG  
TPS7101Y  
TYP  
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
MAX  
Reference voltage (measured at FB with OUT  
connected to FB)  
V = 3.5 V,  
I
I
O
= 10 mA  
1.178  
V
V = 2.4 V,  
50 µA I 150 mA  
0.7  
0.83  
0.52  
0.32  
0.23  
I
O
V = 2.4 V,  
I
150 mA I 500 mA  
O
V = 2.9 V,  
I
50 µA I 500 mA  
Pass-element series resistance (see Note 2)  
O
V = 3.9 V,  
I
50 µA I 500 mA  
O
V = 5.9 V,  
I
50 µA I 500 mA  
O
V = 2.5 V to 10 V,  
I
50 µA I 500 mA,  
O
Input regulation  
18  
14  
22  
mV  
mV  
mV  
See Note 1  
2.5 V V 10 V,  
I
= 5 mA to 500 mA,  
I
O
O
See Note 1  
Output regulation  
2.5 V V 10 V,  
I
= 50 µA to 500 mA,  
I
See Note 1  
V = 3.5 V,  
f = 120 Hz,  
I
Ripple rejection  
59  
dB  
I
O
= 50 µA  
Output noise-spectral density  
V = 3.5 V,  
f = 120 Hz  
2
95  
89  
74  
12  
µV/Hz  
I
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
V = 3.5 V,  
I
Output noise voltage  
µVrms  
10 Hz f 100 kHz,  
CSR = 1 Ω  
§
mV  
V
V = 3.5 V,  
I
Measured at V  
FB  
PG hysteresis voltage  
§
V = 2.13 V,  
I
I
= 400 µA  
0.1  
0.1  
PG output low voltage  
PG  
FB input current  
nA  
V = 3.5 V  
I
V = 3.5 V  
I
§
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).  
NOTES: 1. When V < 2.9 V and I > 150 mA simultaneously, pass element r  
increases (see Figure 27) to a point such that the resulting  
I
O
DS(on)  
dropout voltage prevents the regulator from maintaining the specified tolerance range.  
2. To calculate dropout voltage, use equation:  
V
DO  
= I  
r
O
DS(on)  
r
is a function of both output current and input voltage. The parametric table lists r  
for V = 2.4 V, 2.9 V, 3.9 V, and  
I
DS(on)  
DS(on)  
5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V, respectively. For other  
programmed values, refer to Figure 26.  
11  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
electrical characteristics at I = 10 mA, EN = 0 V, C = 4.7 µF/CSR = 1 , T = 25°C, SENSE shorted  
O
O
J
to OUT (unless otherwise noted) (continued)  
TPS7133Y  
TYP  
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
MAX  
Output voltage  
Dropout voltage  
V = 4.3 V,  
I
O
I
O
I
O
I
O
= 10 mA  
= 10 mA  
= 100 mA  
= 500 mA  
3.3  
V
I
V = 3.23 V,  
I
0.02  
V = 3.23 V,  
I
47  
mV  
V = 3.23 V,  
I
235  
(3.23 V – V )/I ,  
V = 3.23 V,  
I
O
O
Pass-element series resistance  
Output regulation  
0.47  
I
O
= 500 mA  
4.3 V V 10 V,  
I
O
I
O
I
O
I
O
= 5 mA to 500 mA  
= 50 µA to 500 mA  
= 50 µA  
21  
30  
mV  
mV  
I
4.3 V V 10 V,  
I
54  
V = 4.3 V,  
I
f = 120 Hz  
Ripple rejection  
dB  
= 500 mA  
49  
Output noise-spectral density  
V = 4.3 V,  
I
f = 120 Hz  
2
µV/Hz  
274  
228  
159  
35  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
V = 4.3 V,  
I
10 Hz f 100 kHz,  
Output noise voltage  
µVrms  
CSR = 1 Ω  
mV  
V
PG hysteresis voltage  
PG output low voltage  
V = 4.3 V  
I
V = 2.8 V,  
I
I
= 1 mA  
0.22  
PG  
TPS7148Y  
TYP  
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
MAX  
Output voltage  
V = 5.85 V,  
I
O
I
O
I
O
I
O
= 10 mA  
= 10 mA  
= 100 mA  
= 500 mA  
4.85  
V
I
V = 4.75 V,  
I
0.08  
V = 4.75 V,  
I
30  
mV  
Dropout voltage  
V = 4.75 V,  
I
150  
(4.75 V – V )/I ,  
V = 4.75 V,  
I
O
O
Pass-element series resistance  
Output regulation  
0.32  
I
O
= 500 mA  
5.85 V V 10 V,  
I
O
I
O
I
O
I
O
= 5 mA to 500 mA  
= 50 µA to 500 mA  
= 50 µA  
12  
42  
mV  
mV  
I
5.85 V V 10 V,  
I
53  
V = 5.85 V,  
I
f = 120 Hz  
Ripple rejection  
dB  
= 500 mA  
50  
Output noise-spectral density  
V = 5.85 V,  
I
f = 120 Hz  
2
µV/Hz  
410  
328  
212  
50  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
V = 5.85 V,  
I
10 Hz f 100 kHz,  
Output noise voltage  
µVrms  
CSR = 1 Ω  
mV  
V
PG hysteresis voltage  
PG output low voltage  
V = 5.85 V  
I
V = 4.12 V,  
I
I
= 1.2 mA  
0.2  
0.4  
PG  
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
12  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
electrical characteristics at I = 10 mA, EN = 0 V, C = 4.7 µF/CSR = 1 , T = 25°C, SENSE shorted  
O
O
J
to OUT (unless otherwise noted) (continued)  
TPS7150Y  
PARAMETER  
UNIT  
TEST CONDITIONS  
MIN  
TYP  
5
MAX  
Output voltage  
Dropout voltage  
V = 6 V,  
I
O
I
O
I
O
I
O
= 10 mA  
V
I
V = 4.88 V,  
I
= 10 mA  
= 100 mA  
= 500 µA  
0.13  
27  
V = 4.88 V,  
I
mV  
V = 4.88 V,  
I
146  
(4.88 V – V )/I ,  
V = 4.88 V,  
I
O
O
Pass-element series resistance  
Output regulation  
0.29  
I
O
= 500 mA  
6 V V 10 V,  
I
O
I
O
I
O
I
O
= 5 mA to 500 mA  
= 50 µA to 500 mA  
= 50 µA  
30  
45  
mV  
mV  
I
6 V V 10 V,  
I
55  
V = 6 V,  
I
f = 120 Hz  
Ripple rejection  
dB  
= 500 mA  
52  
Output noise-spectral density  
V = 6 V,  
I
f = 120 Hz  
2
µV/Hz  
430  
345  
220  
53  
C
C
C
= 4.7 µF  
= 10 µF  
= 100 µF  
O
O
O
V = 6 V,  
I
10 Hz f 100 kHz,  
Output noise voltage  
µVrms  
CSR = 1 Ω  
mV  
V
PG hysteresis voltage  
PG output low voltage  
V = 6 V  
I
V = 4.25 V,  
I
= 1.2 mA  
0.2  
PG  
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance  
to C  
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must  
be taken into account separately.  
.
O
13  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
Table of Graphs  
FIGURE  
5
vs Output current  
I
Q
Quiescent current  
vs Input voltage  
6
vs Free-air temperature  
vs Output current  
7
V
Typical Dropout voltage  
Change in dropout voltage  
Change in output voltage  
Output voltage  
8
DO  
V  
V  
vs Free-air temperature  
vs Free-air temperature  
vs Input voltage  
9
DO  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
O
V
O
V  
Change in output voltage  
vs Input voltage  
O
V
O
Output voltage  
Ripple rejection  
vs Output current  
vs Frequency  
vs Frequency  
Output spectral noise density  
r
Pass-element resistance  
Divider resistance  
vs Input voltage  
DS(on)  
R
vs Free-air temperature  
vs Free-air temperature  
vs Free-air temperature  
vs Free-air temperature  
vs Free-air temperature  
vs Free-air temperature  
I
SENSE current  
I(SENSE)  
FB leakage current  
Minimum input voltage for active-pass element  
Minimum input voltage for valid PG  
Input current (EN)  
V
I
I
I(EN)  
Output voltage response from Enable (EN)  
Power-good (PG) voltage  
V
PG  
vs Output voltage  
vs Output current  
34  
35  
36  
37  
38  
39  
40  
41  
CSR  
CSR  
CSR  
CSR  
Compensation Series Resistance  
Compensation Series Resistance  
Compensation Series Resistance  
Compensation Series Resistance  
vs Ceramic capacitance  
vs Output current  
vs Ceramic capacitance  
14  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
QUIESCENT CURRENT  
vs  
QUIESCENT CURRENT  
vs  
OUTPUT CURRENT  
INPUT VOLTAGE  
355  
345  
335  
400  
350  
300  
250  
200  
150  
100  
T
R
= 25°C  
= 10 Ω  
A
L
T
= 25°C  
A
TPS71xx, V = 10 V  
I
TPS7133  
TPS7148  
325  
315  
305  
295  
TPS7150  
TPS7101 With V  
Programmed to 2.5 V  
O
TPS7150, V = 6 V  
I
285  
275  
265  
TPS7148, V = 5.85 V  
I
50  
0
TPS7133, V = 4.3 V  
I
0
50 100 150 200 250 300 350 400 450 500  
0
1
2
3
4
5
6
7
8
9
10  
I
O
– Output Current – mA  
V – Input Voltage – V  
I
Figure 5  
Figure 6  
TPS7148Q  
QUIESCENT CURRENT  
vs  
FREE-AIR TEMPERATURE  
DROPOUT VOLTAGE  
vs  
OUTPUT CURRENT  
400  
0.3  
V = V  
+ 1 V  
I
O(nom)  
= 10 mA  
T
A
= 25°C  
I
O
0.25  
350  
300  
250  
TPS7133  
0.2  
0.15  
TPS7148  
TPS7150  
0.1  
0.05  
0
200  
150  
0
50 100 150 200 250 300 350 400 450 500  
50  
25  
0
25  
50  
75  
100  
125  
T
A
– Free-Air Temperature – °C  
I
O
– Output Current – mA  
Figure 8  
Figure 7  
15  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
CHANGE IN DROPOUT VOLTAGE  
vs  
CHANGE IN OUTPUT VOLTAGE  
vs  
FREE-AIR TEMPERATURE  
FREE-AIR TEMPERATURE  
10  
8
20  
15  
10  
5
I
O
= 100 mA  
V = V  
+ 1 V  
I
O(nom)  
I
O
= 10 mA  
6
4
2
0
0
–2  
–4  
–5  
10  
15  
20  
–6  
–8  
10  
50  
25  
0
25  
50  
75  
100  
125  
50  
25  
0
25  
50  
75  
100  
125  
T
A
– Free-Air Temperature – °C  
T
A
– Free-Air Temperature – °C  
Figure 9  
Figure 10  
OUTPUT VOLTAGE  
vs  
INPUT VOLTAGE  
CHANGE IN OUTPUT VOLTAGE  
vs  
INPUT VOLTAGE  
6
5
4
3
2
1
20  
T
R
= 25°C  
= 10 Ω  
T
R
= 25°C  
= 10 Ω  
A
L
A
L
TPS7150  
15  
10  
5
TPS7148  
TPS7150  
TPS7148  
0
–5  
TPS7133  
TPS7133  
TPS7101 With V  
O
Programmed to 2.5 V  
10  
15  
20  
0
0
1
2
3
4
5
6
7
8
9
10  
4
5
6
7
8
9
10  
V – Input Voltage – V  
I
V – Input Voltage – V  
I
Figure 11  
Figure 12  
16  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
TPS7101Q  
OUTPUT VOLTAGE  
vs  
TPS7133Q  
OUTPUT VOLTAGE  
vs  
OUTPUT CURRENT  
OUTPUT CURRENT  
2.52  
2.515  
2.51  
3.34  
3.33  
3.32  
3.31  
3.3  
T
V
= 25°C  
Programmed to 2.5 V  
A
O
T
A
= 25°C  
2.505  
2.5  
V = 10 V  
I
V = 3.5 V  
I
V = 4.3 V  
I
2.495  
2.49  
3.29  
3.28  
V = 10 V  
I
2.485  
2.48  
3.27  
3.26  
0
100  
200  
300  
400  
500  
0
100  
200  
300  
400  
500  
I
O
– Output Current – mA  
I
O
– Output Current – mA  
Figure 13  
Figure 14  
TPS7148Q  
TPS7150Q  
OUTPUT VOLTAGE  
vs  
OUTPUT CURRENT  
OUTPUT VOLTAGE  
vs  
OUTPUT CURRENT  
4.92  
4.91  
4.9  
5.06  
5.05  
5.04  
5.03  
5.02  
5.01  
5
T
A
= 25°C  
T
A
= 25°C  
4.89  
4.88  
4.87  
4.86  
4.85  
4.84  
V = 6 V  
I
V = 5.85 V  
I
4.99  
4.98  
V = 10 V  
I
V = 10 V  
I
4.83  
4.82  
4.81  
4.8  
4.97  
4.96  
4.95  
4.94  
0
100  
200  
300  
400  
500  
0
100  
200  
300  
400  
500  
I
O
– Output Current – mA  
I
O
– Output Current – mA  
Figure 15  
Figure 16  
17  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
TPS7133Q  
RIPPLE REJECTION  
vs  
TPS7101Q  
RIPPLE REJECTION  
vs  
FREQUENCY  
FREQUENCY  
70  
60  
50  
70  
60  
50  
R
= 100 kΩ  
L
R
= 100 kΩ  
L
40  
30  
40  
R
= 500 Ω  
L
30  
20  
10  
0
R
= 500 Ω  
L
T
= 25°C  
20  
A
I
V = 3.5 V  
R
L
= 10 Ω  
C
= 4.7 µF (CSR = 1 )  
T
= 25°C  
O
10  
A
I
No Input Capacitance  
Programmed to 2.5 V  
V = 3.5 V  
V
O
C
= 4.7 µF (CSR = 1 )  
O
0
No Input Capacitance  
R
= 10 Ω  
L
10  
10  
100  
1K  
10K  
100K  
1M  
10M  
10  
100  
1 k  
10 k  
100 k  
1 M  
10 M  
f – Frequency – Hz  
f – Frequency – Hz  
Figure 17  
Figure 18  
TPS7148Q  
RIPPLE REJECTION  
vs  
TPS7150Q  
RIPPLE REJECTION  
vs  
FREQUENCY  
FREQUENCY  
70  
60  
50  
70  
60  
50  
40  
30  
20  
10  
0
R
= 100 kΩ  
L
R
L
= 100 kΩ  
L
40  
30  
R
= 10 Ω  
L
R
= 10 Ω  
L
R
= 500 Ω  
20  
R
= 500 Ω  
L
10  
T
= 25°C  
V = 3.5 V  
A
I
T
= 25°C  
A
V = 3.5 V  
I
0
C
= 4.7 µF (CSR = 1 )  
No Input Capacitance  
O
C
= 4.7 µF (CSR = 1 )  
O
No Input Capacitance  
10  
10  
100 1 k  
10 k  
100 k  
1 M  
10 M  
10  
100 1 k  
10 k  
100 k  
1 M  
10 M  
f – Frequency – Hz  
f – Frequency – Hz  
Figure 19  
Figure 20  
18  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
TPS7101Q  
TPS7133Q  
OUTPUT SPECTRAL NOISE DENSITY  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
vs  
FREQUENCY  
FREQUENCY  
10  
10  
T
= 25°C  
T = 25°C  
A
A
No Input Capacitance  
V = 3.5 V  
V
No Input Capacitance  
V = 4.3 V  
I
I
O
Programmed to 2.5 V  
C
= 10 µF (CSR = 1 )  
C
= 4.7 µF (CSR = 1 )  
O
O
1
1
C
= 4.7 µF (CSR = 1 )  
O
C
= 10 µF (CSR = 1 )  
O
C
= 100 µF (CSR = 1 )  
O
0.1  
0.01  
0.1  
C
= 100 µF (CSR = 1 )  
O
0.01  
2
10  
3
10  
4
10  
5
10  
2
10  
3
10  
4
10  
5
10  
10  
10  
f – Frequency – Hz  
f – Frequency – Hz  
Figure 21  
Figure 22  
TPS7148Q  
TPS7150Q  
OUTPUT SPECTRAL NOISE DENSITY  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
vs  
FREQUENCY  
FREQUENCY  
10  
10  
T
= 25°C  
A
C
= 10 µF (CSR = 1 )  
O
No Input Capacitance  
V = 5.85 V  
I
C
= 4.7 µF (CSR = 1 )  
O
C
= 10 µF (CSR = 1 )  
O
1
1
C
= 4.7 µF (CSR = 1 )  
O
T
A
= 25°C  
No Input Capacitance  
V = 6 V  
I
0.1  
0.01  
0.1  
C
= 100 µF (CSR = 1 )  
O
C
= 100 µF (CSR = 1 )  
O
0.01  
10  
100  
1 k  
10 k  
100 k  
10  
100  
1 k  
10 k  
100 k  
f – Frequency – Hz  
f – Frequency – Hz  
Figure 23  
Figure 24  
19  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
PASS-ELEMENT RESISTANCE  
DIVIDER RESISTANCE  
vs  
FREE-AIR TEMPERATURE  
vs  
INPUT VOLTAGE  
1.1  
1
1.2  
1.1  
1
T
V
= 25°C  
V = V  
I
I(sense)  
+ 1 V  
A
O(nom)  
= V  
= 1.12 V  
V
I(FB)  
O(nom)  
TPS7150  
0.9  
0.8  
0.7  
TPS7148  
I
O
= 500 mA  
0.9  
0.6  
0.5  
0.4  
0.8  
0.7  
I
O
= 100 mA  
TPS7133  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
2
3
4
5
6
7
8
9
10  
50  
25  
0
25  
50  
75  
100  
125  
V – Input Voltage – V  
I
T
A
– Free-Air Temperature – °C  
Figure 25  
Figure 26  
FIXED-OUTPUT VERSIONS  
SENSE PIN CURRENT  
vs  
ADJUSTABLE VERSION  
FB LEAKAGE CURRENT  
vs  
FREE-AIR TEMPERATURE  
FREE-AIR TEMPERATURE  
6
5.8  
5.6  
5.4  
0.6  
V = V  
+ 1 V  
O(nom)  
I
V
FB  
= 2.5 V  
V
= V  
I(sense)  
O(nom)  
0.5  
0.4  
0.3  
5.2  
5
0.2  
0.1  
0
4.8  
4.6  
4.4  
50  
25  
T
0
25  
50  
75  
100  
125  
50  
25  
0
25  
50  
75  
100  
125  
– Free-Air Temperature – °C  
T
A
– Free-Air Temperature – °C  
A
Figure 27  
Figure 28  
20  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
MINIMUM INPUT VOLTAGE FOR ACTIVE  
MINIMUM INPUT VOLTAGE FOR VALID  
POWER GOOD (PG)  
vs  
PASS ELEMENT  
vs  
FREE-AIR TEMPERATURE  
FREE-AIR TEMPERATURE  
1.1  
2.1  
2.09  
2.08  
2.07  
R
= 500 Ω  
L
1.09  
1.08  
1.07  
2.06  
2.05  
2.04  
2.03  
2.02  
1.06  
1.05  
2.01  
2
50  
25  
0
25  
50  
75  
100  
125  
50  
25  
0
25  
50  
75  
100  
125  
T
A
– Free-Air Temperature – °C  
T
A
– Free-Air Temperature – °C  
Figure 29  
Figure 30  
EN INPUT CURRENT  
vs  
FREE-AIR TEMPERATURE  
100  
V = V  
I
= 10 V  
I(EN)  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
40 20  
0
20 40 60  
80 100 120 140  
T
A
– Free-Air Temperature – °C  
Figure 31  
21  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
OUTPUT VOLTAGE RESPONSE FROM  
ENABLE (EN)  
V
O(nom)  
T
R
C
= 25°C  
= 500 Ω  
= 4.7 µF (ESR = 1)  
A
L
O
6
4
No Input Capacitance  
2
0
–2  
0
20 40 60 80 100 120 140  
Time – µs  
Figure 32  
POWER-GOOD (PG) VOLTAGE  
vs  
OUTPUT VOLTAGE  
6
5
4
3
2
1
T
= 25°C  
A
PG Pulled Up to 5 V With 5 kΩ  
0
93  
94  
95  
96  
97  
98  
) – %  
V
O
– Output Voltage (V as a percent of V  
O
O(nom)  
Figure 33  
22  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
TYPICAL REGIONS OF STABILITY  
COMPENSATION SERIES RESISTANCE  
vs  
TYPICAL REGIONS OF STABILITY  
COMPENSATION SERIES RESISTANCE  
vs  
OUTPUT CURRENT  
OUTPUT CURRENT  
100  
100  
V = V  
+ 1 V  
I
O(nom)  
No Input Capacitance  
= 4.7 µF  
V = V  
+ 1 V  
I
O(nom)  
No Input Capacitance  
= 4.7 µF + 0.5 µF of  
C
O
C
O
No Added Ceramic Capacitance  
= 25°C  
Ceramic Capacitance  
= 25°C  
T
A
T
A
Region of Instability  
10  
10  
Region of Instability  
1
1
Region of Instability  
Region of Instability  
50 100 150 200 250 300 350 400 450 500  
0.1  
0.1  
0
50 100 150 200 250 300 350 400 450 500  
0
I
O
– Output Current – mA  
I
O
– Output Current – mA  
Figure 34  
Figure 35  
TYPICAL REGIONS OF STABILITY  
COMPENSATION SERIES RESISTANCE  
vs  
TYPICAL REGIONS OF STABILITY  
COMPENSATION SERIES RESISTANCE  
vs  
ADDED CERAMIC CAPACITANCE  
ADDED CERAMIC CAPACITANCE  
100  
100  
V = V  
+ 1 V  
V = V  
+ 1 V  
I
O(nom)  
No Input Capacitance  
= 100 mA  
I
O(nom)  
No Input Capacitance  
I = 500 mA  
O
I
C
T
O
O
A
= 4.7 µF  
= 25°C  
C
= 4.7 µF  
T = 25°C  
A
O
10  
10  
Region of Instability  
Region of Instability  
1
1
Region of Instability  
Region of Instability  
0.1  
0.1  
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9  
1
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9  
1
Ceramic Capacitance – µF  
Ceramic Capacitance – µF  
Figure 36  
Figure 37  
23  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
TYPICAL REGIONS OF STABILITY  
TYPICAL REGIONS OF STABILITY  
COMPENSATION SERIES RESISTANCE  
COMPENSATION SERIES RESISTANCE  
vs  
vs  
OUTPUT CURRENT  
OUTPUT CURRENT  
100  
100  
V = V  
+ 1 V  
I
O(nom)  
No Input Capacitance  
= 10 µF  
V = V  
+ 1 V  
Region of Instability  
I
O(nom)  
No Input Capacitance  
C = 10 µF + 0.5 µF of  
O
C
O
No Ceramic Capacitance  
= 25°C  
Added Ceramic Capacitance  
T = 25°C  
A
T
A
10  
10  
Region of Instability  
1
1
0.1  
0.1  
0
50 100 150 200 250 300 350 400 450 500  
0
50 100 150 200 250 300 350 400 450 500  
I
O
– Output Current – mA  
I
O
– Output Current – mA  
Figure 38  
Figure 39  
TYPICAL REGIONS OF STABILITY  
TYPICAL REGIONS OF STABILITY  
COMPENSATION SERIES RESISTANCE  
vs  
COMPENSATION SERIES RESISTANCE  
vs  
ADDED CERAMIC CAPACITANCE  
ADDED CERAMIC CAPACITANCE  
100  
100  
V = V  
+ 1 V  
V = V  
+ 1 V  
I
O(nom)  
No Input Capacitance  
= 10 µF  
I
O(nom)  
No Input Capacitance  
C = 10 µF  
O
C
O
I
T
= 100 mA  
I
T
= 500 mA  
= 25°C  
O
O
= 25°C  
A
A
10  
10  
Region of Instability  
Region of Instability  
1
1
0.1  
0.1  
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9  
1
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9  
1
Ceramic Capacitance – µF  
Ceramic Capacitance – µF  
Figure 40  
Figure 41  
CSR values below 0.1 are not recommended.  
24  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
TYPICAL CHARACTERISTICS  
To Load  
IN  
V
I
OUT  
+
SENSE  
C
O
C
cer  
R
EN  
L
GND  
CSR  
Ceramic capacitor  
Figure 42. Test Circuit for Typical Regions of Stability (Figures 34 through 41)  
25  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
APPLICATION INFORMATION  
The TPS71xx series of low-dropout (LDO) regulators is designed to overcome many of the shortcomings of  
earlier-generation LDOs, while adding features such as a power-saving shutdown mode and a power-good  
indicator. The TPS71xx family includes three fixed-output voltage regulators: the TPS7133 (3.3 V), the  
TPS7148(4.85V), andtheTPS7150(5V). Thefamilyalsooffersanadjustabledevice, theTPS7101(adjustable  
from 1.2 V to 9.75 V).  
device operation  
The TPS71xx, unlike many other LDOs, features very low quiescent currents that remain 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). Close examination of the data sheets reveals  
B
C
that those devices are typically specified under near no-load conditions; actual operating currents are much  
higher as evidenced by typical quiescent current versus load current curves. The TPS71xx uses a PMOS  
transistor to pass current; because the gate of the PMOS element is voltage driven, operating currents are low  
and invariable over the full load range. The TPS71xx specifications reflect actual performance under load.  
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  
TPS71xx quiescent current remains low even when the regulator drops out, eliminating both problems.  
Included in the TPS71xx family is a 4.85-V regulator, the TPS7148. Designed specifically for 5-V cellular  
systems, its 4.85-V output, regulated to within ± 2%, allows for operation within the low-end limit of 5-V systems  
specified to ± 5% tolerance; therefore, maximum regulated operating lifetime is obtained from a battery pack  
before the device drops out, adding crucial talk minutes between charges.  
The TPS71xx 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 under 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 reestablished in typically 120 µs.  
minimum load requirements  
The TPS71xx family is stable even at zero load; no minimum load is required for operation.  
SENSE-pin connection  
The SENSE pin of fixed-output devices must be connected to the regulator output for proper functioning of the  
regulator. Normally, this connection should be as short as possible; however, the connection can be made near  
a critical circuit (remote sense) to improve performance at that point. Internally, SENSE connects to a  
high-impedance wide-bandwidth amplifier through a resistor-divider network and noise pickup feeds through  
to the regulator output. Routing the SENSE connection to minimize/avoid noise pickup is essential. Adding an  
RC network between SENSE and OUT to filter noise is not recommended because it can cause the regulator  
to oscillate.  
external capacitor requirements  
An input capacitor is not required; however, a ceramic bypass capacitor (0.047 pF to 0.1 µF) improves load  
transient response and noise rejection if the TPS71xx 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.  
26  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
APPLICATION INFORMATION  
external capacitor requirements (continued)  
As with most LDO regulators, the TPS71xx family requires an output capacitor for stability. A low-ESR 10-µF  
solid-tantalum capacitor connected from the regulator output to ground is sufficient to ensure stability over the  
full load range (see Figure 43). Adding high-frequency ceramic or film capacitors (such as power-supply bypass  
capacitors for digital or analog ICs) can cause the regulator to become unstable unless the ESR of the tantalum  
capacitor is less than 1.2 over temperature. Capacitors with published ESR specifications such as the  
AVX TPSD106K035R0300 and the Sprague 593D106X0035D2W work well because the maximum ESR at  
25°C is 300 m(typically, the ESR in solid-tantalum capacitors increases by a factor of 2 or less when the  
temperature drops from 25°C to 40°C). Where component height and/or mounting area is a problem,  
physically smaller, 10-µF devices can be screened for ESR. Figures 34 through 41 show the stable regions of  
operation using different values of output capacitance with various values of ceramic load capacitance.  
In applications with little or no high-frequency bypass capacitance (< 0.2 µF), the output capacitance can be  
reduced to 4.7 µF, provided ESR is maintained between 0.7 and 2.5 . Because minimum capacitor ESR is  
seldom if ever specified, it may be necessary to add a 0.5-to 1-resistor in series with the capacitor and limit  
ESR to 1.5 maximum. As show in the ESR graphs (Figures 34 through 41), minimum ESR is not a problem  
when using 10-µF or larger output capacitors.  
Below is a partial listing of surface-mount capacitors usable with the TPS71xx family. This information (along  
with the ESR graphs, Figures 34 through 41) is included to assist in selection of suitable capacitance for the  
user’s application. When necessary to achieve low height requirements along with high output current and/or  
high ceramic load capacitance, several higher ESR capacitors can be used in parallel to meet the guidelines  
above.  
All load and temperature conditions with up to 1 µF of added ceramic load capacitance:  
PART NO.  
MFR.  
VALUE  
MAX ESR  
0.5  
SIZE (H × L × W)  
2.8 × 6 × 3.2  
T421C226M010AS  
593D156X0025D2W  
593D106X0035D2W  
Kemet  
22 µF, 10 V  
Sprague 15 µF, 25 V  
Sprague 10 µF, 35 V  
0.3  
2.8 × 7.3 × 4.3  
2.8 × 7.3 × 4.3  
2.8 × 7.3 × 4.3  
0.3  
TPSD106M035R0300 AVX  
10 µF, 35 V  
0.3  
Load < 200 mA, ceramic load capacitance < 0.2 µF, full temperature range:  
PART NO.  
MFR.  
VALUE  
MAX ESR  
SIZE (H × L × W)  
1.2 × 7.2 × 6  
592D156X0020R2T  
595D156X0025C2T  
595D106X0025C2T  
293D226X0016D2W  
Sprague 15 µF, 20 V  
Sprague 15 µF, 25 V  
Sprague 10 µF, 25 V  
Sprague 22 µF, 16 V  
1.1  
1
2.5 × 7.1 × 3.2  
2.5 × 7.1 × 3.2  
2.8 × 7.3 × 4.3  
1.2  
1.1  
Load < 100 mA, ceramic load capacitance < 0.2 µF, full temperature range:  
PART NO.  
MFR.  
VALUE  
MAX ESR  
1.5  
SIZE (H × L × W)  
1.3 × 3.5 × 2.7  
1.3 × 7 × 2.7  
195D106X06R3V2T  
195D106X0016X2T  
595D156X0016B2T  
695D226X0015F2T  
695D156X0020F2T  
695D106X0035G2T  
Sprague 10 µF, 6.3 V  
Sprague 10 µF, 16 V  
Sprague 15 µF, 16 V  
Sprague 22 µF, 15 V  
Sprague 15 µF, 20 V  
Sprague 10 µF, 35 V  
1.5  
1.8  
1.6 × 3.8 × 2.6  
1.8 × 6.5 × 3.4  
1.8 × 6.5 × 3.4  
2.5 × 7.6 × 2.5  
1.4  
1.5  
1.3  
Size is in mm. ESR is maximum resistance at 100 kHz and T = 25°C. Listings are sorted by height.  
A
27  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
APPLICATION INFORMATION  
external capacitor requirements (continued)  
TPS71xx  
8
20  
15  
14  
13  
V
IN  
PG  
PG  
I
9
250 kΩ  
IN SENSE  
10  
V
O
IN  
OUT  
OUT  
C1  
0.1 µF  
50 V  
6
EN  
C
+
O
10 µF  
GND  
CSR  
1
2
3
TPS7133, TPS7148, TPS7150 (fixed-voltage options)  
Figure 43. Typical Application Circuit  
programming the TPS7101 adjustable LDO regulator  
Programming the adjustable regulators is accomplished using an external resistor divider as shown in  
Figure 44. The equation governing the output voltage is:  
R1  
R2  
V
V
1
O
ref  
where  
V
= reference voltage, 1.178 V typ  
ref  
28  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
APPLICATION INFORMATION  
programming the TPS7101 adjustable LDO regulator (continued)  
Resistors R1 and R2 should be chosen for approximately 7-µA divider current. A recommended value for R2  
is 169 kwith R1 adjusted for the desired output voltage. Smaller resistors can be used, but offer no inherent  
advantage and consume more power. Larger values of R1 and R2 should be avoided as leakage currents at  
FB will introduce an error. Solving equation 1 for R1 yields a more useful equation for choosing the appropriate  
resistance:  
V
O
R1  
1
R2  
V
ref  
OUTPUT VOLTAGE  
PROGRAMMING GUIDE  
TPS7101  
OUTPUT  
VOLTAGE  
R1  
R2  
UNIT  
Power-Good  
Indicator  
250 kΩ  
V
I
IN  
PG  
OUT  
FB  
0.1 µF  
2.5 V  
3.3 V  
3.6 V  
4 V  
191  
309  
348  
402  
549  
750  
169  
169  
169  
169  
169  
169  
kΩ  
kΩ  
kΩ  
kΩ  
kΩ  
kΩ  
>2.7 V  
EN  
V
O
<0.5V  
+
R1  
5 V  
GND  
6.4 V  
R2  
Figure 44. TPS7101 Adjustable LDO Regulator Programming  
power-good indicator  
The TPS71xx 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 as a low-battery  
indicator. PG 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.  
regulator protection  
The TPS71xx PMOS-pass transistor has a built-in back diode that safely 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 TPS71xx also features internal current limiting and thermal protection. During normal operation, the  
TPS71xx limits output current to approximately 1 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 165°C, thermal-protection circuitry shuts it down. Once the device has cooled, regulator  
operation resumes.  
29  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
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: B. All linear dimensions are in inches (millimeters).  
C. This drawing is subject to change without notice.  
D. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).  
E. Four center pins are connected to die mount pad.  
F. Falls within JEDEC MS-012  
30  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
MECHANICAL DATA  
P (R-PDIP-T8)  
PLASTIC DUAL-IN-LINE PACKAGE  
0.400 (10,60)  
0.355 (9,02)  
8
5
0.260 (6,60)  
0.240 (6,10)  
1
4
0.070 (1,78) MAX  
0.310 (7,87)  
0.290 (7,37)  
0.020 (0,51) MIN  
0.200 (5,08) MAX  
Seating Plane  
0.125 (3,18) MIN  
0.100 (2,54)  
0°15°  
0.021 (0,53)  
0.015 (0,38)  
0.010 (0,25)  
M
0.010 (0,25) NOM  
4040082/B 03/95  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. Falls within JEDEC MS-001  
31  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
TPS7101Q, TPS7133Q, TPS7148Q, TPS7150Q  
TPS7101Y, TPS7133Y, TPS7148Y, TPS7150Y  
LOW-DROPOUT VOLTAGE REGULATORS  
SLVS092F – NOVEMBER 1994 – REVISED JANUARY 1997  
MECHANICAL DATA  
PW (R-PDSO-G**)  
PLASTIC SMALL-OUTLINE PACKAGE  
14 PIN SHOWN  
0,32  
0,17  
0,65  
M
0,13  
14  
8
0,15 NOM  
4,50  
4,30  
6,70  
6,10  
Gage Plane  
0,25  
1
7
0°8°  
0,75  
A
0,50  
Seating Plane  
0,10  
1,20 MAX  
0,10 MIN  
PINS **  
8
14  
16  
20  
24  
28  
DIM  
3,10  
2,90  
5,10  
4,90  
5,10  
4,90  
6,60  
6,40  
7,90  
7,70  
9,80  
9,60  
A MAX  
A MIN  
4040064/D 10/95  
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 protrusion not to exceed 0,15.  
D. Falls within JEDEC MO-153  
32  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
IMPORTANT NOTICE  
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue  
any product or service without notice, and advise customers to obtain the latest version of relevant information  
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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  
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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  
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Copyright 1999, Texas Instruments Incorporated  

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