TI TPPM0303

TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
D
D
D
D
D
Automatic Input Voltage Source Selection
Glitch-Free Regulated Output
5-V Input Voltage Source Detector With
Hysteresis
250-mA Load Current Capability With 5-V or
3.3-V Input Source
Low rDS(on) Auxiliary Switch
D PACKAGE
(TOP VIEW)
5VAUX
5VCC
3.3VOUT
3.3VAUX
1
8
2
7
3
6
4
5
NC
GND
NC
NC
description
The TPPM0303 is a low-dropout regulator with auxiliary power management that provides a constant 3.3-V
supply at the output capable of driving a 250-mA load.
The TPPM0303 provides a regulated power output for systems that have multiple input sources and require a
constant voltage source with a low-dropout voltage. This is a single output, multiple input, intelligent power
source selection device with a low-dropout regulator for either 5VCC or 5VAUX inputs, and a low-resistance
bypass switch for the 3.3VAUX input.
Transitions may occur from one input supply to another without generating a glitch outside of the specification
range on the 3.3-V output. The device has an incorporated reverse-blocking scheme to prevent excess leakage
from the input terminals in the event that the output voltage is greater than the input voltage.
The input voltage is prioritized in the following order: 5VCC, 5VAUX, and 3.3VAUX.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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1
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
functional block diagram
Linear Regulator
With LDO
5VCC
3.3VOUT
5-V
Detection
Current
Sensor
Over
Temperature
Gate Drive
and Control
5VAUX
5VAUX
Detection
Linear Regulator
With LDO
GND
Current
Sensor
Gate Drive
and Control
Low ON
Resistance
Switch
3.3VAUX
3VAUX
Detection
Current
Sensor
Gate Drive
5-V Detection
and Control
Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
3.3VAUX
4
I
3.3-V auxiliary input
3.3VOUT
3
O
3.3-V output with a typical capacitance load of 4.7 µF
5VAUX
1
I
5-V auxiliary input
5VCC
2
I
5-V main input
GND
7
I
Ground
NC
2
5,6,8
No internal connection
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
Table 1. Input Selection
INPUT VOLTAGE STATUS
(V)
3.3VAUX
INPUT SELECTED
OUTPUT
(V)
OUTPUT
(I)
5VCC/5VAUX/3.3VAUX
3.3VOUT
5VCC
5VAUX
0
0
0
None
0
IL (mA)
0
0
0
3.3
3.3VAUX
3.3
250
0
5
0
5VAUX
3.3
250
0
5
3.3
5VAUX
3.3
250
5
0
0
5VCC
3.3
250
5
0
3.3
5VCC
3.3
250
5
5
0
5VCC
3.3
250
5
5
3.3
5VCC
3.3
250
absolute maximum ratings over operating free-air temperature (unless otherwise noted)†
Supply voltage, 5-V main input, V(5VCC) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Auxiliary voltage, 5-V input, V(5VAUX) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Auxiliary voltage, 3.3-V input, V(3.3VAUX) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V
3.3-V output current limit, I(LIMIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
Continuous power dissipation (low-K), PD (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.625 W
Electrostatic discharge susceptibility, human body model, V(HBMESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Operating ambient temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 150°C
Operating junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 5°C to 120°C
Lead temperature (soldering, 10 second), T(LEAD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
NOTES: 1. All voltage values are with respect to GND.
2. Absolute negative voltage on these terminal should not be below –0.5 V.
3. The device derates with increase in ambient temperature, TA. See Thermal Information section.
recommended operating conditions
MIN
TYP
MAX
UNIT
5-V main input, V(5VCC)
4.5
5.5
V
5-V auxiliary input, V(5VAUX)
4.5
5.5
V
3
3.6
V
5.17
µF
3.3-V auxiliary input, V(3.3VAUX)
Load capacitance, CL
4.23
4.7
Load current, IL
0
250
mA
Ambient temperature, TA
0
70
°C
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• DALLAS, TEXAS 75265
3
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
electrical characteristics over recommended operating free-air temperature range, TA = 0°C to
70°C, CL = 4.7 µF (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V(5VCC)/
V(5VAUX)
5-V inputs
I(Q)
Quiescent supplyy current
IL
I(LIMIT)
T(TSD)†
Output load current
Thys†
V(3.3VOUT)
Thermal hysteresis
CL
Load capacitance
Ilkg(REV)
Reverse leakage output current
MIN
TYP
MAX
4.5
5
5.5
2.5
5
mA
250
500
µA
From 5VCC or 5VAUX terminals, IL = 0 to
250 mA
From 3.3VAUX terminal, IL = 0 A
0.25
Output current limit
3.3VOUT = 0 V
Thermal shutdown
3 3VOUT output shorted to 0 V
3.3VOUT
3.3-V output
IL = 250 mA
Minimal ESR to insure stability of regulated
output
2
150
180
15
3.135
3.3
3.465
V
A
°C
V
µF
4.7
Tested for input that is grounded.
3.3VAUX, 5VAUX or 5VCC = GND,
3.3VOUT = 3.3 V
UNIT
50
µA
† Design targets only. Not tested in production.
5-V detect
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V(TO_LO)
Threshold voltage, low
5VAUX or 5VCC ↓
3.85
4.05
4.25
V
V(TO_HI)
Threshold voltage, high
5VAUX or 5VCC ↑
4.1
4.3
4.5
V
MIN
TYP
MAX
auxiliary switch
PARAMETER
TEST CONDITIONS
R(SWITCH)
Auxiliary switch resistance
5VAUX = 5VCC = 0 V,
3.3VAUX = 3.3 V, IL = 150 mA
∆VO(∆VI)
∆VO(∆IO)
Line regulation voltage
5VAUX or 5VCC = 4.5 V to 5.5 V
Load regulation voltage
20 mA < IL < 250 mA
VI – VO
Dropout voltage
IL < 250 mA
0.4
2
UNIT
Ω
mV
40
mV
1
V
thermal characteristics
PARAMETER
RθJC
RθJA
MIN
Thermal impedance, junction-to-case
Thermal im
impedance
edance, junction-to-ambient
MAX
UNIT
39
°C/W
Low-K (see Note 4)
176
High-K (see Note 4)
98
NOTE 4: See JEDEC PCB specifications for low-K and high-K.
4
TYP
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°C/W
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
TYPICAL CHARACTERISTICS
5VCC
3.3VAUX
3.3VOUT
3.3VOUT
(250-mA Load)
Figure 1. 5VCC Cold Start
(250-mA Load)
Figure 2. 3.3VAUX Cold Start
5VCC (Offset = 4.5 V)
3.3VAUX (Offset = 3.3 V)
5VAUX (Offset = 4.8 V)
5VCC (Offset = 4.5 V)
3.3VOUT (Offset = 3.3 V)
3.3VOUT (Offset = 3.3 V)
(250-mA Load)
Figure 3. 5VCC Power Up (5VAUX = 5 V)
POST OFFICE BOX 655303
(250-mA Load)
Figure 4. 5VCC Power Up (3.3VAUX = 3.3 V)
• DALLAS, TEXAS 75265
5
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
TYPICAL CHARACTERISTICS
3.3VAUX (Offset = 3.3 V)
5VCC (Offset = 4.3 V)
5VAUX (Offset = 4.5 V)
3.3VOUT (Offset = 3.3 V)
(250-mA Load)
Figure 5. 5VAUX Power Up (3.3VAUX = 3.3 V)
(250-mA Load)
Figure 6. 5VCC Power Down (3.3VAUX = 3.3 V)
Sample
Trig?
3.3VOUT (Offset = 3.3 V)
(250-mA Load)
5VAUX (Offset = 5 V)
3.3VOUT (Offset = 3.3 V)
250-mA to 20-mA
Step Load
5VCC (Offset = 4.5 V)
Figure 7. 5VCC Power Down (5VAUX = 5 V)
6
POST OFFICE BOX 655303
Figure 8. 5VCC Load Transient Response Falling
• DALLAS, TEXAS 75265
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
TYPICAL CHARACTERISTICS
Sample
Trig?
3.3VOUT (Offset = 3.3 V)
20-mA to 250-mA
Step Load
Figure 9. 5VCC Load Transient Response Rising
THERMAL INFORMATION
To ensure reliable operation of the device, the junction temperature of the output device must be within the safe
operating area (SOA). This is achieved by having a means to dissipate the heat generated from the junction
of the output structure. There are two components that contribute to thermal resistance. They consist of two
paths in series. The first is the junction to case thermal resistance, RθJC; the second is the case to ambient
thermal resistance, RθCA. The overall junction to ambient thermal resistance, RθJA, is determined by:
RθJA = RθJC + RθCA
The ability to efficiently dissipate the heat from the junction is a function of the package style and board layout
incorporated in the application. The operating junction temperature is determined by the operating ambient
temperature, TA, and the junction power dissipation, PJ.
The junction temperature, TJ, is equal to the following thermal equation:
TJ = TA + PJ (RθJC) + PJ (RθCA)
TJ = TA + PJ (RθJA)
This particular application uses the 8-pin SO package with standard lead frame with a dedicated ground
terminal. Hence, the maximum power dissipation allowable for an operating ambient temperature of 70°C, and
a maximum junction temperature of 150°C is determined as:
PJ = (TJ – TA)/RθJA
PJ = (150 – 70)/176 = 0.45 W when using a low-K PCB.
PJ = (150 – 70)/98 = 0.81 W when using a high-K PCB.
Worst case maximum power dissipation is determined by:
PD = (5.5 – 3) × 0.25 = 0.625 W
Normal operating maximum power dissipation is (see Figure 10):
PD = (5 – 3.3) × 0.25 = 0.425 W
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• DALLAS, TEXAS 75265
7
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
THERMAL INFORMATION
Power Dissipation Derate Curve Using
High-K PCB
1.275
Power – W
Power Dissipation Derate Curve Using
Low-K PCB
0.71
0.625
0.425
25
39
75 89
108
150
Ambient Temperature – °C
NOTE: These curves are to be used for guideline purposes only. For a particular application, a more specific thermal characterization is required.
Figure 10. Power Dissipation Derating Curves
APPLICATION INFORMATION
1
4.7 µF
NC
8
0.1 µF
2
4.7 µF
5VAUX
0.1 µF
5VCC
GND
7
TPPM0303
3
6
3.3VOUT
NC
3.3VAUX
NC
4.7 µF
4
4.7 µF
5
0.1 µF
Figure 11. Typical Application Schematic
8
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TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
MECHANICAL DATA
D (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0.050 (1,27)
0.020 (0,51)
0.014 (0,35)
14
0.010 (0,25) M
8
0.008 (0,20) NOM
0.244 (6,20)
0.228 (5,80)
0.157 (4,00)
0.150 (3,81)
Gage Plane
0.010 (0,25)
1
7
0°– 8°
A
0.044 (1,12)
0.016 (0,40)
Seating Plane
0.069 (1,75) MAX
0.010 (0,25)
0.004 (0,10)
PINS **
0.004 (0,10)
8
14
16
A MAX
0.197
(5,00)
0.344
(8,75)
0.394
(10,00)
A MIN
0.189
(4,80)
0.337
(8,55)
0.386
(9,80)
DIM
4040047 / D 10/96
NOTES: A.
B.
C.
D.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
Falls within JEDEC MS-012
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