TI TPS7A6201-Q1

TPS7A6201-Q1
www.ti.com
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
300-mA 40-V LOW-DROPOUT REGULATOR WITH 25-µA QUIESCENT CURRENT
Check for Samples: TPS7A6201-Q1
FEATURES
1
•
•
•
•
•
•
•
•
DESCRIPTION
Low Dropout Voltage
– 300mV at IOUT = 150mA
4-V to 40-V Wide Input Voltage Range
With up to 45-V Transients
300-mA Maximum Output Current
Ultra Low Quiescent Current
– IQUIESCENT = 25 µA (Typ) at Light Loads
– ISLEEP < 2 µA when EN = Low
2.5-V to 7-V Programmable Output Voltage
Low-ESR Ceramic Output Stability Capacitor
Integrated Fault Protection
– Short-Circuit/Over-Current Protection
– Thermal Shutdown
Low Input Voltage Tracking
Thermally Enhanced Power Package
– 5-pin TO-263 (KTT /D2PAK)
The TPS7A6201 is a low dropout linear voltage
regulator designed for low power consumption and
quiescent current less than 25 µA in light load
applications. This device features an integrated overcurrent protection, and is designed to achieve stable
operation even with low-ESR ceramic output
capacitors. The output voltage can be programmed
using external resistors. Low voltage tracking feature
allows for a smaller input capacitor and can possibly
eliminate the need of using a boost converter during
cold crank conditions. Because of these features, this
device is well suited in power supplies for various
automotive applications.
TYPICAL REGULATOR STABILITY
10
VIN = 14V
COUT = 10µF, 47µF
TA = 27°C
VOUT = 5V, 3.3V
ESR of COUT (Ω)
•
APPLICATIONS
•
•
•
•
Qualified for Automotive Applications
Infotainment Systems with Sleep Mode
Body Control Modules
Always ON Battery Applications
– Gateway Applications
– Remote Keyless Entry Systems
– Immobilizers
1
Stable Operation
Over Entire Region
0.1
0.01
0.01
0.1
1
10
100 300
IOUT (mA)
Figure 1. ESR vs Load Current for TPS7A6201
TYPICAL APPLICATION SCHEMATIC
TPS7A6201
VIN
VIN
VOUT
R1
CIN
EN
VEN
VOUT
COUT
FB
R2
GND
Figure 2. Application Schematic
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2012, Texas Instruments Incorporated
TPS7A6201-Q1
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
www.ti.com
ORDERING INFORMATION (1)
PACKAGE
5 pin KTT
(1)
(2)
TOP SIDE MARKING
ORDERABLE PART NUMBER (2)
7A6201Q1
TPS7A6201QKTTRQ1
Reel of 500
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 www.ti.com.
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
ABSOLUTE MAXIMUM RATINGS (1)
over operating free-air temperature range (unless otherwise noted)
NO.
DESCRIPTION
VALUE
UNIT
-0.3 to 45
V
Regulated output
7
V
Feedback voltage
-0.3 to 7
V
Thermal impedance junction to exposed pad KTT (D2PAK) package
10.4
°C/W
θJA
Thermal impedance junction to ambient KTT (D2PAK) package (3)
30.2
°C/W
1.6
θJA
Thermal impedance junction to ambient KTT (D2PAK) package (4)
34.4
°C/W
1.7
ESD
Electrostatic discharge (Human Body Model) (5)
2
kV
1.8
TOP
Operating ambient temperature
-40 to +125
°C
1.9
TS
Storage temperature range
-65 to +150
°C
1.10
TLEAD
Lead temperature (soldering, 10sec)
260
°C
1.1
VIN,
VEN
Unregulated inputs (2)
1.2
VOUT
1.3
VFB
1.4
θJP
1.5
(1)
(2)
(3)
(4)
(5)
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 GND.
Absolute maximum voltage for duration less than 480ms.
The thermal data is based on JEDEC standard high K profile – JESD 51-5. The copper pad is soldered to the thermal land pattern. Also
correct attachment procedure needs to be incorporated.
The thermal data is based on JEDEC standard low K profile – JESD 51-3. The copper pad is soldered to the thermal land pattern. Also
correct attachment procedure needs to be incorporated.
Tested in accordance with JEDEC Standard 22, Test Method A114-A (100pF capacitor discharged through a 1.5kΩ resistor into each
pin).
DISSIPATION RATINGS
NO.
JEDEC STANDARD
PACKAGE
TA < 25°C POWER
RATING (W)
DERATING FACTOR
ABOVE TA = 25°C (°C/W)
TA = 85°C POWER
RATING (W)
2.1
JEDEC Standard
PCB - low K, JESD 51-3
5 pin KTT
3.63
34.4
1.89
2.2
JEDEC Standard
PCB - high K, JESD 51-5
5 pin KTT
4.14
30.2
2.15
RECOMMENDED OPERATING CONDITIONS
NO.
2
DESCRIPTION
3.1
VIN, VEN
Unregulated input voltage
3.2
TJ
Operating junction temperature range
MIN
MAX
4
40
UNIT
V
-40
150
°C
Copyright © 2010–2012, Texas Instruments Incorporated
TPS7A6201-Q1
www.ti.com
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
ELECTRICAL CHARACTERISTICS
VIN = 14V, TJ = -40ºC to 150ºC (unless otherwise noted)
NO.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
4. Input Voltage (VIN pin)
4.1
VIN
Input voltage
4
40
V
40
µA
3
µA
4.2
IQUIESCENT
Quiescent current
VIN = 8.2V to 18V, VEN = 5V,
IOUT = 0.01mA to 0.75mA
4.3
ISLEEP
Sleep/shutdown current
VIN = 8.2V to 18V, VEN < 0.8V,
IOUT = 0mA (no load), TA = 125°C
4.4
VIN-UVLO
Under voltage lock out
voltage
Ramp VIN down until output is turned OFF
3.16
V
4.5
VIN(POWERUP)
Power up voltage
Ramp VIN up until output is turned ON
3.45
V
25
5. Enable Input (EN pin)
5.1
VIL
Logic input low level
5.2
VIH
Logic input high level
0
0.8
V
2.5
40
V
-2
2
%
VIN = 6V to 28V, IOUT = 10mA, VOUT = 7V
15
mV
[VIN = 6V to 28V, IOUT = 10mA, VOUT = 3.3V ] (1)
20
mV
IOUT = 10mA to 300mA, VIN= 14V, VOUT = 7V
25
mV
[IOUT = 10mA to 300mA,VIN = 14V, VOUT = 3.3V ] (1)
35
mV
6. Regulated Output Voltage (VOUT pin)
6.1
VREF
Internal Reference Voltage IOUT = 10mA to 300mA, VIN= VOUT + 1V to 16V
6.2
∆VLINE-REG
Line regulation
6.3
∆VLOAD-REG
Load regulation
6.4
VDROPOUT (2)
Dropout voltage
(VIN – VOUT)
IOUT = 250mA
500
mV
IOUT = 150mA
300
mV
6.5
RSW (1)
Switch resistance
VIN to VOUT resistance
6.6
IOUT
Output current
VOUT in regulation
6.7
ICL
Output current limit
VOUT = 0V (VOUT pin is shorted to ground)
6.8
PSRR (1)
Power supply ripple
rejection
2
Ω
0
300
mA
350
1000
mA
VIN-RIPPLE = 0.5 Vpp, IOUT = 300mA,
frequency = 100 Hz, VOUT = 5V and VOUT = 3.3V
60
VIN-RIPPLE = 0.5 Vpp, IOUT = 300mA,
frequency = 150 kHz, VOUT = 5V and VOUT = 3.3V
30
dB
7. Operating Temperature Range
7.1
TJ
Operating junction
temperature
7.2
TSHUTDOWN
Thermal shutdown trip
point
7.3
THYST
Thermal shutdown
hysteresis
(1)
(2)
-40
150
ºC
165
ºC
10
ºC
Specified by design – not tested
This test is done with VOUT is in regulation and VIN – VOUT parameter is measured when VOUT (programmned output voltage, ex. 5V or
3.3V) drops by 100mV at specified loads.
Copyright © 2010–2012, Texas Instruments Incorporated
3
TPS7A6201-Q1
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
www.ti.com
DEVICE INFORMATION
KTT PACKAGE
(TOP VIEW)
1
2
3
4
VIN
EN
GND
FB
5
VOUT
TERMINAL FUNCTIONS
NO.
4
NAME
TYPE
DESCRIPTION
1
VIN
I
Input voltage pin: The unregulated input voltage is supplied to this pin. A bypass capacitor shall be
connected between VIN pin and GND pin to dampen input line transients.
2
EN
I
Enable pin: This is a high voltage tolerant input pin with an internal pull down. A high input to this pin
activates the device and turns the regulator ON. This input can be connected to VIN terminal for self
bias applications. If this pin is not connected, the device will stay disabled.
3
GND
I/O
4
FB
I
Feedback pin: This pin is used to connect external resistors to ground in order to program the output
voltage.
5
VOUT
O
Regulated output voltage pin: This is a regulated output voltage pin with a limitation on maximum output
current. An external resistor divider is connected at this pin to program the output voltage. In order to
achieve stable operation and prevent oscillation, an external output capacitor (COUT) with low ESR shall
be connected between this pin and GND pin.
Ground pin: This is signal ground pin of the IC.
Copyright © 2010–2012, Texas Instruments Incorporated
TPS7A6201-Q1
www.ti.com
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
FUNCTIONAL BLOCK DIAGRAM
VIN
VIN
Band
Gap
VRef1
Temp. Sensor/
Thermal Shutdown
CIN
UVLO Comp.
with internal
reference
Q1
VRef1
Logic
Control
Regulator Error
Amp.
Control
VOUT
VEN
VOUT
EN
COUT
R1
Over Current
Detection
FB
Charge Pump
Oscillator
R2
GND
Figure 3. TPS7A6201 Functional Block Diagram
Copyright © 2010–2012, Texas Instruments Incorporated
5
TPS7A6201-Q1
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
www.ti.com
TYPICAL CHARACTERISTICS
Graphs shown in 'Typical Characteristics' section for unreleased devices are for preview only.
10
VIN = 14V
COUT = 1µF
TA = 27°C
VOUT = 5V
VIN = 14V
COUT = 1µF
TA = 27°C
VOUT = 3.3V
ESR of COUT (Ω)
ESR of COUT (Ω)
10
1
Stable Operation
0.1
0.06
1
Stable Operation
0.1
Unstable
Operation
0.06
0.03
0.01
0.01
Unstable
Operation
0.1
1
IOUT (mA)
10
30
100
0.03
0.01
0.01
300
Figure 4. ESR vs Load Current
0.1
1
IOUT (mA)
10
IOUT = 1mA
50
IQUIESCENT (µA)
I QUIESCENT (µA)
40
30
VIN = 14V
TA = 25°C
VOUT = 5V, 3.3V
VOUT = 5V, 3.3V
40
35
30
25
20
15
10
0.1
IOUT (mA)
50
T A (°C)
Figure 6. Quiescent Current vs Load Current
Figure 7. Quiescent Current vs Ambient Air Temperature
1
10
100
-50
0
100
0.4
700
VOUT = 5V, 3.3V
600
TA= 25°C
V OUT = 5V
0.3
500
400
300
150
0.35
VDROP OUT (V)
I QUIESCENT (µA)
VIN =14V
45
20
IOUT = 100mA
200
T A = 125°C
0.25
T A = 25°C
0.2
T A = -40°C
0.15
0.1
No Load
100
0.05
0
4
14
24
V IN (V)
34
Figure 8. Quiescent Current vs Input Voltage
6
300
55
50
(1)
100
Figure 5. ESR vs Load Current
60
0
30
40
0
50
100
150
IOUT (mA)
200
250
300
Figure 9. Drop Out Voltage (1)vs Load Current
Drop out voltage is measured when the output voltage drops by 100mV from the regulated output voltage level. (For example, if output
voltage is programmed to be 5V, the drop out voltage is measured when the output voltage drops down to 4.9V from 5V.)
Copyright © 2010–2012, Texas Instruments Incorporated
TPS7A6201-Q1
www.ti.com
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
TYPICAL CHARACTERISTICS (continued)
5.1
6
VIN = 14V
5.08
IOUT = 1mA
TA = 25°C
5
5.06
5.04
4
VOUT (V)
5.02
VOUT (V)
IOUT = 100mA
5
4.98
3
2
4.96
4.94
1
4.92
4.9
-50
0
50
TA (°C)
100
0
150
2
0.12
0.1
7
650
TA = 25°C
TA = -40°C
600
550
0.02
500
0
0
10
20
30
40
450
-50
50
0
VIN (V)
Figure 12. Output Current vs Input Voltage
12
3
10.5
10
9.5
9
150
2
1.5
1
0.5
8.5
8
-50
100
IOUT = 10mA
VOUT = 5V, 3.3V
VIN step from
8V to 28V
2.5
Line Regulation (mV)
11
50
TA (°C)
Figure 13. Output Current Limit vs
Ambient Air Temperature
VIN = 14V
VOUT = 5V, 3.3V
IOUT step from
10mA to 300mA
11.5
Load Regulation (mV)
6
VIN = 14V
VOUT = 5V, 3.3V
700
ICL (mA)
IOUT (A)
750
TA= 125°C
0.04
5
Figure 11. Output Voltage vs Input Voltage
(VOUT programmed to 5 V)
ILOAD = 100mA
VOUT = 5V, 3.3V
0.06
4
V IN (V)
Figure 10. Output Voltage vs Ambient Air Temperature
(VOUT programmed to 5 V)
0.08
3
0
50
T A (°C)
100
150
Figure 14. Load Regulation vs Ambient Air Temperature
Copyright © 2010–2012, Texas Instruments Incorporated
0
-50
0
50
T A (°C)
100
150
Figure 15. Line Regulation vs Ambient Air Temperature
7
TPS7A6201-Q1
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
www.ti.com
TYPICAL CHARACTERISTICS (continued)
120
VIN = 14V
IOUT = 250mA
TA = 25°C
COUT = 10µF
VOUT = 5V, 3.3V
80
60
40
60
20
10
100
10k
1k
Frequency (Hz)
100k
Figure 16. PSRR at Heavy Load Current
8
80
40
20
0
VIN = 14V
IOUT = 1mA
TA = 25°C
COUT = 10µF
VOUT = 5V, 3.3V
100
PSRR (dB)
PSRR (dB)
100
120
1M
0
10
100
10k
1k
Frequency (Hz)
100k
1M
Figure 17. PSRR at Light Load Current
Copyright © 2010–2012, Texas Instruments Incorporated
TPS7A6201-Q1
www.ti.com
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
DETAILED DESCRIPTION
TPS7A6201 is a monolithic low dropout linear voltage
regulator with programmable output voltage and an
integrated fault protection. This voltage regulator is
designed for low power consumption and quiescent
current less than 25µA in light load applications.
This device is available in two 5 pin package options
as follows:
• KTT/ D2PAK
The following section describes the features of
TPS7A6201 voltage regulator in detail.
VREF = reference voltage (VREF= 1.23 V typically)
R1, R2 = feedback resistors (see Figure 3)
The overall tolerance of the regulated output voltage
depends on the tolerance of internal reference
voltage and external feedback resistors, and is given
by Equation 2.
é R1 ù
tolVOUT = tolVREF + ê
ú éë tolR1 + tolR2 ùû
ë R1 + R2 û
(2)
Where,
Power Up
tolVOUT = tolerance of output voltage
During power up, the regulator incorporates a
protection scheme to limit the current through pass
element and output capacitor. When the input voltage
exceeds a certain threshold (VIN(POWERUP)) level, the
output voltage begins to ramp up as shown in
Figure 18.
tolVREF = tolerance of internal reference voltage
(tolVREF = ± 1.5% typically)
VIN
tolR1,tolR2 = tolerance of feedback resistors R1, R2
For a tighter tolerance on VOUT, lower-value feedback
resistors can be selected. It is recommended to
select feedback resistors such that the sum of R1 and
R2 is between 20kΩ and 200kΩ.
Enable Input
This device has a high voltage tolerant EN pin that
can be used to enable and disable a device from an
external microcontroller or a digital control circuit. A
high input to this pin activates the device and turns
the regulator on. This input can also be connected to
VIN terminal for self bias applications. An internal pull
down resistor is connected to this pin, and therefore if
this pin is left unconnected, the device will stay
disabled.
VIN(POWERUP)
0
VOUT
5V or 3.3V
0
Charge Pump Operation
Figure 18.
Adjustable Output Voltage
The regulated output voltage (VOUT) can be
programmed by connecting external resistors to FB
pin. The feedback resistor values can be calculated
using Equation 1.
R1 ù
é
VOUT = VREF ê1 +
R2 úû
ë
This device has an internal charge pump which turns
on or off depending on the input voltage and the
output current. The charge pump switching circuitry
shall not cause conducted emissions to exceed
required thresholds on the input voltage line. For a
given output current, the charge pump stays on at
lower input voltages and turns off at higher input
voltages. The charge pump switching thresholds are
hysteretic. Figure 19 and Figure 20 shows typical
switching thresholds for the charge pump at light (IOUT
< ~2mA) and heavy (IOUT > ~2mA) loads respectively.
(1)
Where,
VOUT=desired output voltage
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Charge Pump State
Low Voltage Tracking
At low input voltages the regulator drops out of
regulation, the output voltage tracks input minus a
voltage based on the load current (IOUT) and switch
resistance (RSW) as shown in Figure DDD. This
allows for a smaller input capacitor and can possibly
eliminate the need of using a boost convertor during
cold crank conditions.
ON
Hysteresis
OFF
7.8
7.9
VIN (V)
Figure 19. Charge Pump Operation at Light
Loads
VIN-UVLO
Charge Pump State
VIN
0
ON
5V or 3.3V
Hysteresis
VOUT
0
OFF
Tracking
9.2
9.6
VIN (V)
Figure 21.
Figure 20. Charge Pump Operation at Heavy
Loads
Low Power Mode
At light loads and high input voltages (VIN>~8V such
that charge pump is off) the device operates in Low
Power Mode and the quiescent current consumption
is reduced to 25µA (typical) as shown in Table 1.
Table 1. Typical Quiescent Current Consumption
IOUT
Charge Pump ON
Charge Pump OFF
IOUT < ~2mA
(Light load)
250 µA
25 µA
(Low Power Mode)
IOUT > ~2mA
(Heavy load)
280 µA
70 µA
Under Voltage Shutdown
This device has an integrated under voltage lock out
(UVLO) circuit to shutdown the output if the input
voltage (VIN) falls below an internally fixed UVLO
threshold level (VIN-UVLO) as shown in Figure 21. This
ensures that the regulator is not latched into an
unknown state during low input voltage conditions.
The regulator will normally power up when the input
voltage exceeds VIN(POWERUP) threshold.
10
Integrated Fault Protection
The device features integrated fault protection to
make it ideal for use in automotive applications. In
order to keep the device in safe area of operation
during certain fault conditions, internal current limit
protection and current limit fold back are used to limit
the maximum output current. This protects the device
from excessive power dissipation. For example,
during a short circuit condition on the output; current
through the pass element is limited to ICL to protect
the device from excessive power dissipation.
Thermal Shutdown
The device incorporates a thermal shutdown (TSD)
circuit as a protection from overheating. For
continuous
normal
operation,
the
junction
temperature should not exceed TSD trip point. If the
junction temperature exceeds TSD trip point, the
output is turned off. When the junction temperature
falls below TSD trip point, the output is turned on
again. This is shown in Figure 22.
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TPS7A6201-Q1
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SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
Figure 22. Thermal Cycling Waveform for
TPS7A6201 (VIN = 24 V, IOUT = 300 mA, VOUT = 5 V)
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APPLICATION INFORMATION
Typical application circuit for TPS7A6201 is shown in
Figure 23. Depending upon an end application,
different values of external components may be used.
In order to program the output voltage, feedback
resistors (R1 and R2) should be carefully selected.
Using small resistors will result in higher current
consumption, where as, using very large resistors will
impact the sensitivity of the regulator. Therefore, It is
recommended to select feedback resistors such that
the sum of R1 and R2 is between 20kΩ and 200kΩ.
Also, the overall tolerance of the regulated output
voltage depends on the tolerance of internal
reference voltage and external feedback resistors.
A larger output capacitor may be required during fast
load steps to prevent output from temporarily
dropping down. A low ESR ceramic capacitor with
dielectric of type X5R or X7R is recommended.
Additionally, a bypass capacitor can be connected at
the output to decouple high frequency noise as per
the end application.
If the desired regulated output voltage is 5V, upon
selecting R2; R1 can be calculated using Equation 1
(and vice versa). Knowing VREF = 1.23V (typical),
VOUT = 5V, selecting R2 = 20kΩ, R1 is calculated to
be 61.3kΩ.
TPS7A6201
VIN
VIN
VOUT
10µF
to
22µF
VEN
As IQUIESCENT << IOUT, therefore, the
IQUIESCENT × VIN in Equation 3 can be ignored.
term
For device under operation at a given ambient air
temperature (TA), the junction temperature (TJ) can
be calculated using Equation 4.
TJ = TA + (θJA × PD)
(4)
Where,
θJA = junction to ambient air thermal impedance
The rise in junction temperature due to power
dissipation can be calculated using Equation 5.
ΔT = TJ – TA = (θJA × PD)
(5)
For a given maximum junction temperature (TJ-Max),
the maximum ambient air temperature (TA-Max) at
which the device can operate can be calculated using
Equation 6.
TA-Max = TJ-Max – (θJA × PD)
(6)
Example
Example
0.1µF
IQUIESCENT = quiescent current
VOUT
R1
EN
1µF
to
10µF
0.1µF
FB
If IOUT = 100mA, VOUT = 5V, VIN = 14V, IQUIESCENT =
250µA and θJA= 30˚C/W, the continuous power
dissipated in the device is 0.9W. The rise in junction
temperature due to power dissipation is 27˚C. For a
maximum junction temperature of 150˚C, maximum
ambient air temperature at which the device can
operate is 123˚C.
For adequate heat dissipation, it is recommended to
solder the thermal pad (exposed heat sink) to thermal
land pad on the PCB. Doing this provides a heat
conduction path from die to the PCB and reduces
overall package thermal resistance. Power derating
curves for TPS7A6201 device in the KTT (D2PAK)
package is shown in Figure 24.
R2
4
GND
3.5
Figure 23. Typical Application Schematic for
TPS7A6201
Power Dissipated (W)
Power Dissipation and Thermal
Considerations
Power dissipated in the device can be calculated
using Equation 3.
PD = IOUT × (VIN - VOUT)) + IQUIESCENT × VIN
Where,
PD = continuous power dissipation
IOUT = output current
VIN = input voltage
VOUT = output voltage
12
JESD 51-5 (KTT)
3
(3)
2.5
2
JESD 51-3 (KTT)
1.5
1
0.5
0
0
25
50
75
100
125
150
Ambient Air Temperature (°C)
Figure 24. Power Derating Curves
Copyright © 2010–2012, Texas Instruments Incorporated
TPS7A6201-Q1
www.ti.com
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
For optimum thermal performance, it is recommended
to use a high K PCB with thermal vias between
ground plane and solder pad/ thermal land pad. This
is shown in Figure 25 (a) and (b). Further, heat
spreading capabilities of a PCB can be considerably
improved by using a thicker ground plane and a
thermal land pad with a larger surface area.
Keeping other factors constant, surface area of the
thermal land pad contributes to heat dissipation only
to a certain extent. Figure 26 shows variation of θJA
with surface area of the thermal land pad (soldered to
the exposed pad) for KTT package.
55
50
q JA (°C/W)
Exposed Tab
Thermal Via
Thermal Land Pad
45
40
PCB
Ground Plane
KTT (D2PAK) (JESD 51-3)
(a) Before soldering
35
30
0
200
400
600
800
1000
Thermal Pad Area (sq. mm)
Figure 26. θJA vs Thermal Pad Area
(b) After soldering
Figure 25. Using Multilayer PCB and Thermal
Vias For Adequate Heat Dissipation
Copyright © 2010–2012, Texas Instruments Incorporated
13
TPS7A6201-Q1
SLVSAA0B – NOVEMBER 2010 – REVISED MARCH 2012
www.ti.com
REVISION HISTORY
Changes from Revision A (December 2011) to Revision B
•
14
Page
Added value to test conditions field in Regulated Output Voltage 6.1 (IOUT = 10mA to 300mA, VIN= VOUT + 1V to
16V) ...................................................................................................................................................................................... 3
Copyright © 2010–2012, Texas Instruments Incorporated
PACKAGE OPTION ADDENDUM
www.ti.com
27-Mar-2012
PACKAGING INFORMATION
Orderable Device
TPS7A6201QKTTRQ1
Status
(1)
ACTIVE
Package Type Package
Drawing
DDPAK/
TO-263
KTT
Pins
Package Qty
5
500
Eco Plan
(2)
Green (RoHS
& no Sb/Br)
Lead/
Ball Finish
CU SN
MSL Peak Temp
(3)
Samples
(Requires Login)
Level-3-245C-168 HR
(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
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.
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Mar-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
TPS7A6201QKTTRQ1
Package Package Pins
Type Drawing
SPQ
DDPAK/
TO-263
500
KTT
5
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
330.0
24.4
Pack Materials-Page 1
10.6
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
15.8
4.9
16.0
24.0
Q2
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Mar-2012
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
TPS7A6201QKTTRQ1
DDPAK/TO-263
KTT
5
500
340.0
340.0
38.0
Pack Materials-Page 2
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