DIODES AP7361

AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Description
Pin Assignments
NEW PRODUCT
The AP7361 is a 1A, adjustable and fixed output voltage,
ultra-low dropout linear regulator with enable. The device
includes pass element, error amplifier, band-gap reference,
current limit and thermal shutdown circuitry. The device is
turned on when EN pin is set to logic high level.
(Top View)
OUT
1
8
IN
NC
2
7
NC
ADJ/NC
3
6
NC
4
5
EN
The characteristics of the low dropout voltage and low
quiescent current make it suitable for low to medium power
applications, for example, laptop computers, audio and video
applications, and battery powered devices. The typical
quiescent current is approximately 70µA. Built-in current-limit
and thermal-shutdown functions prevent IC from damage in
fault conditions.
DFN3030E-8
Features
The AP7361 is available in DFN3030E-8 package.
Applications
•
•
•
•
GND
GND
Servers and laptops
FPGA and DSP core or I/O power
TV, and home electrical appliances
Battery-powered devices
Note: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS
exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Wide input voltage range: 2.2V – 6V
150mV very low dropout at 300mA load
500mV very low dropout at 1A load
Low quiescent current (IQ): 70µA typical
Adjustable output voltage range: 1V to 5.0V
Fixed output options: 1V to 3.3V
Very fast transient response
High PSRR
Accurate voltage regulation
Current limiting and short circuit protection
Thermal shutdown protection
Stable with ceramic output capacitor ≥ 2.2µF
Ambient temperature range -40ºC to 85 ºC
DFN3030E-8: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
Typical Application Circuit
V IN
V OUT
IN
V IN
V OUT
IN
OUT
AP7361
AP7361
1uF
Enable
OUT
4.7uF
1uF
EN
Enable
R1
4.7uF
ADJ
EN
GND
G ND
Fixed Output
Adjustable Output
AP7361
Document number: DS33626 Rev. 1 - 2
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© Diodes Incorporated
AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
NEW PRODUCT
Pin Descriptions
Pin Number
Pin
Name
DFN3030E-8
IN
8
OUT
1
GND
4
ADJ
3
EN
5
NC
2, 6, 7
Description
The input of the regulator. Bypass to ground through at least 1µF ceramic
capacitor.
The output of the regulator. Bypass to ground through at least 2.2µF ceramic
capacitor. For improved ac load response a larger capacitor is recommended.
Ground.
Adjustable voltage version only – a resistor divider from this pin to the OUT pin
and ground sets the output voltage.
Enable input, active high.
No connection.
Functional Block Diagram
IN
EN
OUT
Gate
Driver
Current Limit
and Thermal
Shutdown
IN
EN
R
OUT
Gate
Driver
Current Limit
and Thermal
Shutdown
ADJ
0.8V
0.8V
R
GND
GND
Adjustable Version
Fixed Version
Absolute Maximum Ratings
Symbol
Parameter
ESD HBM
Human Body Model ESD Protection
ESD MM
VIN
TJ
Machine Model ESD Protection
Input Voltage
OUT, ADJ, EN Voltage
Operating Junction Temperature Range
TST
Storage Temperature Range
PD
Power Dissipation (Note 2)
PD
Power Dissipation (Note 2)
Note:
DFN3030E-8
Ratings
Unit
>2
> 200
6.5
VIN + 0.3
-40 ~ 150
KV
-65 ~150
Internally limited by maximum
junction temperature of 150°C
°C
1700
mW
V
V
V
°C
2. Ratings apply to ambient temperature at 25°C
AP7361
Document number: DS33626 Rev. 1 - 2
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Recommended Operating Conditions
Symbol
Input voltage
Output Current (Note 3)
Operating Ambient Temperature
VIN
IOUT
TA
NEW PRODUCT
Note:
Parameter
Min
Max
Unit
2.2
0
-40
6.0
1.0
85
V
A
°C
3. The device maintains a stable, regulated output voltage without a load current. When the output current is large, attention should be
given to the limitation of the package power dissipation.
Electrical Characteristics
(TA = 25oC, VIN = VOUT +1V, CIN = 1μF, COUT = 4.7μF, VEN = VIN, unless otherwise stated)
Symbol
Parameter
Test Conditions
VREF
IADJ
IQ
ISHDN
FB reference voltage
ADJ pin leakage
Input Quiescent Current
Input Shutdown Current
VOUT
Output Voltage Accuracy
ΔVOUT
ΔVIN × VOUT
Line Regulation
ΔVOUT / VOUT Load Regulation
VDropout
VIL
VIH
IEN
ILIMIT
ISHORT
PSRR
Dropout Voltage (Note 4)
EN Input Logic Low Voltage
EN Input Logic High Voltage
EN Input leakage
Current limit
Short-circuit Current
Power Supply Rejection Ratio
(Note 5)
Start-up Time
tST
ΔVOUT
Output voltage temperature
ΔTA × VOUT coefficient
TSHDN
THYS
θJA
Notes:
Thermal shutdown threshold
Thermal shutdown hysteresis
Thermal Resistance Junction-toAmbient
Min
IOUT = 10mA, TA = 25°C
Enabled, IOUT = 0A
VEN = 0V, IOUT = 0A
IOUT = 100mA, TA = 25°C
IOUT = 100mA, -40°C ≤ TA ≤ 85°C
Over VIN, IOUT, and TA
VIN = VOUT +1V to TA = 25°C
6V, IOUT = 100mA -40°C ≤TA ≤ 85°C
IOUT from 1mA to 300mA
IOUT from 1mA to 1A
IOUT = 300mA
IOUT = 500mA
IOUT = 1A
VIN = 6V, VEN = 0V or 6V
VIN = VOUT +1V
VIN = VOUT +1V,
Output Voltage < 25% Vout
f = 1KHz, IOUT = 100mA
f = 10KHz, IOUT = 100mA
VOUT = 3V, COUT = 1µF, RL = 30Ω
IOUT = 100mA, -40°C ≤ TA ≤ 85°C
DFN3030E-8 (Note 6)
-1
-1
-2
-3
-1.0
-1.0
0
1.0
-0.1
1.1
Typ.
0.8
0.1
70
0.05
±0.5
0.01
0.5
0.5
150
250
500
0.01
1.5
Max
0.5
90
1
1
2
3
0.1
0.2
1.0
1.0
200
350
700
0.3
VIN
0.1
Unit
V
µA
µA
µA
%
%/V
%
%
mV
V
V
µA
A
200
60
mA
65
45
200
dB
µs
±130
ppm/°C
150
20
°C
°C
70
o
C/W
4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its
nominal value. This parameter only applies to output voltages above 1.5V since minimum VIN = 2.2V.
5. For VIN ≥ 2.5V and VIN = VOUT + 1V. For VIN < 2.5V, the PSRR performance may be reduced.
6. Test condition for DFN3030E-8: Device mounted on 2"x2", FR-4 substrate PCB, with minimum recommended pad on top layer
and thermal vias to bottom layer ground plane.
AP7361
Document number: DS33626 Rev. 1 - 2
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Typical Performance Characteristics
Start-up Time
NEW PRODUCT
Start-up Time
VEN=0 to 2V (1V/div)
VIN=4.0V
CIN=COUT=1μF
VEN=0 to 2V (1V/div)
VIN=4.0V
CIN=COUT=1μF
VOUT=3.0V (1V/div)
with 100mA load
VOUT=3.0V (1V/div)
with 500mA load
Time (100μs/div)
Time (100μs/div)
Line Transient Response
Line Transient Response
VIN=4.3V to 5.3V (1V/div)
Tr=Tf=5μs
IOUT=100mA
COUT=4.7μF
VIN=5.5V to 6V (1V/div)
Tr=Tf=5μs
IOUT=100mA
COUT=4.7μF
VOUT=3.3V (20mV/div)
VOUT=5.0V (20mV/div)
Time (40μs/div)
AP7361
Document number: DS33626 Rev. 1 - 2
Time (40μs/div)
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Typical Performance Characteristics (Continued)
Load Transient Response
VIN=VEN=2.2V
CIN=1μF,COUT=4.7μF
Load Transient Response
VIN=VEN=2.2V
CIN=1μF,COUT=4.7μF
NEW PRODUCT
VOUT=1.2V (20mV/div)
VOUT=1.2V (20mV/div)
IOUT=50mA to 100mA (50mA/div)
IOUT=100mA to 500mA (200mA/div)
Time (200μs/div)
Time (200μs/div)
Load Transient Response
Load Transient Response
VIN=VEN=4.3V
CIN=1μF,COUT=4.7μF
VIN=VEN=4.3V
CIN=1μF,COUT=4.7μF
VOUT=3.3V (20mV/div)
VOUT=3.3V (20mV/div)
IOUT=50mA to 100mA (50mA/div)
IOUT=100mA to 500mA (200mA/div)
Time (200μs/div)
AP7361
Document number: DS33626 Rev. 1 - 2
Time (200μs/div)
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Typical Performance Characteristics (Continued)
Load Transient Response
Load Transient Response
VIN=VEN=6.0V
CIN=1μF,COUT=4.7μF
VIN=VEN=6.0V
CIN=1μF,COUT=4.7μF
NEW PRODUCT
VOUT=5.0V (20mV/div)
VOUT=5.0V (20mV/div)
IOUT=50mA to 100mA (50mA/div)
IOUT=100mA to 500mA (200mA/div)
Time (200μs/div)
Time (200μs/div)
PSRR vs Frequency
PSRR vs Frequency
100
IOUT=30mA
90
80
80
70
70
PSRR(dB)
PSRR(dB)
90
100
60
50
IOUT=100mA
40
30
20
10
VIN=2.5V+0.5VppAC
VOUT=1.2V
COUT=4.7μF
TA=25°C
0
10
0.01
IOUT=30mA
60
50
IOUT=100mA
40
30
20
10
VIN=2.8V+0.5VppAC
VOUT=1.8V
COUT=4.7μF
TA=25°C
0
100
0.1
1k
10k
1
10
Frequency(Hz)
AP7361
Document number: DS33626 Rev. 1 - 2
100k
100
1M
1000
10
0.01
100
0.1
1k
1
10k
10
100k
100
1M
1000
Frequency(Hz)
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Typical Performance Characteristics (Continued)
PSRR vs Frequency
PSRR vs Frequency
100
100
IOUT=30mA
70
70
PSRR(dB)
PSRR(dB)
80
60
IOUT=100mA
50
40
60
50
10
IOUT=100mA
40
VIN=3.5V+0.5VppAC
VOUT=2.5V
COUT=4.7μF
TA=25°C
20
IOUT=30mA
90
80
30
VIN=4.3V+0.5VppAC
VOUT=3.3V
COUT=4.7μF
TA=25°C
30
20
10
0
0
10
0.01
100
0.1
1k
10k
1
10
Frequency(Hz)
100k
100
1M
1000
10
0.01
100
0.1
1k
10k
1
10
Frequency(Hz)
100k
100
1M
1000
Dropout Voltage vs Output Current
FB Reference Voltage vs Temperature
0.82
600
VIN=4.3V
IOUT=100mA
VOUT=3.3V
500
Dropout Voltage(mV)
FB Reference Voltage(V)
NEW PRODUCT
90
0.81
0.80
0.79
25°C
400
85°C
300
-40°C
200
100
0
0.78
-50
-25
0
25
50
75
Temperature(℃ )
AP7361
Document number: DS33626 Rev. 1 - 2
100
125
0
200
400
600
800
1000
Output Current(mA)
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Typical Performance Characteristics (Continued)
2.0
2.0
Current limit(A)
Current limit(A)
Current limit vs Temperature
2.5
1.5
1.0
VOUT=1.2V
1.5
1.0
VIN=2.2V
VOUT=1.2V
0.5
0.5
0.0
0.0
2
3
4
Input Voltage(V)
5
-50
6
-25
0
25
50
75
100
125
Temperature(℃ )
Short-circuit current vs Temperature
Current limit vs Temperature
300
Short-circuit current (mA)
2.5
2.0
Current limit(A)
NEW PRODUCT
Current limit vs Input Voltage
2.5
1.5
1.0
VIN=4.3V
VOUT=3.3V
0.5
250
200
150
100
VIN=4.3V
50
0.0
0
-50
-25
0
25
50
75
100
125
Temperature(℃ )
AP7361
Document number: DS33626 Rev. 1 - 2
-50
-25
0
25
50
75
100
125
Temperature(℃ )
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Typical Performance Characteristics (Continued)
Line Regulation
Load Regulation
0.9
0.2
VIN=VEN=4.3V
VOUT=3.3V
85°C
Output Variation(%/V)
Output Variation(%)
VOUT=3.3V
IOUT=100mA
25°C
0.3
0.0
-0.3
-40°C
0.1
85°C
0.0
-0.1
25°C
-0.6
-40°C
-0.2
-0.9
0
200
400
600
800
4
1000
4.5
5
5.5
6
Input Voltage(V)
Output Current(mA)
Input Quiescent Current vs Input Voltage
Input Quiescent Current vs Temperature
80
80
Input Quiescent Current(μA)
Input Quiescent Current(μA)
NEW PRODUCT
0.6
60
40
VIN=VEN=4.3V
IOUT=0mA
20
60
40
TA=25°C
IOUT=0mA
20
0
0
-50
-25
0
25
50
75
Temperature(℃ )
AP7361
Document number: DS33626 Rev. 1 - 2
100
125
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4
4.5
5
5.5
Input Voltage(V)
6
December 2010
© Diodes Incorporated
AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
NEW PRODUCT
Application Information
Input Capacitor
Adjustable Operation
A 1μF ceramic capacitor is recommended between IN and
GND pins to decouple input power supply glitch and noise.
The amount of the capacitance may be increased without
limit. This input capacitor must be located as close as
possible to the device to assure input stability and reduce
noise. For PCB layout, a wide copper trace is required for
both IN and GND pins. A lower ESR capacitor type allows
the use of less capacitance, while higher ESR type
requires more capacitance.
The AP7361 provides output voltage from 0.8V to 5.0V
through external resistor divider as shown below.
V IN
V OU T
IN
O UT
AP7361
1uF
Enable
R1
4.7uF
ADJ
EN
G ND
Output Capacitor
The output capacitor is required to stabilize and improve
the transient response of the LDO. The AP7361 is stable
with very small ceramic output capacitors. Using a ceramic
capacitor value that is at least 2.2μF with 10mΩ ≦ ESR ≦
300mΩ on the output ensures stability. Higher capacitance
values help to improve line and load transient response.
The output capacitance may be increased to keep low
undershoot and overshoot. Output capacitor must be
placed as close as possible to OUT and GND pins.
R2
Adjustable Output
The output voltage is calculated by:
⎛
R ⎞
VOUT = VREF ⎜⎜1 + 1 ⎟⎟
R
2⎠
⎝
Where VREF=0.8V (the internal reference voltage)
Rearranging the equation will give the following that is
used for adjusting the output to a particular voltage:
⎞
⎛V
R1 = R2 ⎜⎜ OUT − 1⎟⎟
V
REF
⎠
⎝
To maintain the stability of the internal reference voltage,
R2 need to be kept smaller than 80kΩ.
No Load Stability
Other than external resistor divider, no minimum load is
required to keep the device stable. The device will remain
stable and regulated in no load condition.
ON/OFF Input Operation
The AP7361 is turned on by setting the EN pin high, and
is turned off by pulling it low. If this feature is not used,
the EN pin should be tied to IN pin to keep the regulator
output on at all time. To ensure proper operation, the
signal source used to drive the EN pin must be able to
swing above and below the specified turn-on/off voltage
thresholds listed in the Electrical Characteristics section
under VIL and VIH.
AP7361
Document number: DS33626 Rev. 1 - 2
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Application Information (Continued)
Current Limit Protection
Ultra Fast Start-up
When output current at OUT pin is higher than current limit
threshold, the current limit protection will be triggered and
clamp the output current to prevent over-current and to
protect the regulator from damage due to overheating.
After enabled, the AP7361 is able to provide full power in
as little as tens of microseconds, typically 200µs, without
sacrificing low ground current. This feature will help load
circuitry move in and out of standby mode in real time,
eventually extend battery life for mobile phones and other
portable devices.
NEW PRODUCT
Short Circuit Protection
When OUT pin is short-circuit to GND, short circuit
protection will be triggered and clamp the output current to
approximately 200mA. Full current is restored when the
output voltage exceeds 25% of Vout. This feature protects
the regulator from over-current and damage due to
overheating.
Low Quiescent Current
The AP7361, consuming only around 70µA for all input
range, provides great power saving in portable and low
power applications.
Power Dissipation
Thermal Shutdown Protection
Thermal protection disables the output when the junction
temperature rises to approximately +150°C, allowing the
device to cool down. When the junction temperature
reduces to approximately +130°C the output circuitry is
enabled again. Depending on power dissipation, thermal
resistance, and ambient temperature, the thermal
protection circuit may cycle on and off. This cycling limits
the heat dissipation of the regulator, protecting it from
damage due to overheating.
The device power dissipation and proper sizing of the
thermal plane that is connected to the thermal pad is
critical to avoid thermal shutdown and ensure reliable
operation. Power dissipation of the device depends on
input voltage and load conditions and can be calculated
by:
PD = (VIN - VOUT) X IOUT
The maximum power dissipation, handled by the device,
depends on the maximum junction to ambient thermal
resistance, maximum ambient temperature, and
maximum device junction temperature, which can be
calculated by the equation in the following:
PD ([email protected] TA ) =
AP7361
Document number: DS33626 Rev. 1 - 2
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( +150°C - TA )
R θJA
December 2010
© Diodes Incorporated
AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Ordering Information
AP7361 - XX XXX - X
Output
NEW PRODUCT
Blank : ADJ
10 : 1.0V
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
33 : 3.3V
Note:
Package
Packing
FGE : DFN3030E-8
7 : Tape & Reel
Device
Package Code
Packaging
(Note 7)
AP7361-XXFGE-7
FGE
DFN3030E-8
7”/13” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP7361
Document number: DS33626 Rev. 1 - 2
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Marking Information
(1) DFN3030E-8
( Top View )
NEW PRODUCT
XX
YW X
XX : Identification Code
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : A~Z : Internal code
Device
Package
Identification Code
AP7361ADJ
AP7361-10
AP7361-12
AP7361-15
AP7361-18
AP7361-25
AP7361-28
AP7361-33
DFN3030E-8
DFN3030E-8
DFN3030E-8
DFN3030E-8
DFN3030E-8
DFN3030E-8
DFN3030E-8
DFN3030E-8
PA
PB
PC
PD
PE
PF
PG
PH
Package Outline Dimensions
0.10 C
0.08 C
Side View
2.95/3.05
B
0.65
8x-0.30
CL
C
A
CL
(Pin #1 ID)
1.60
2X-
0.25 A
0/0.05
Seating Plane
0.57/0.63
8X-
2.95/3.05
1.40/1.60
8x-0.65
CL
2.75
TOP MARK
0.15Typ.
(1) Package Type: DFN3030E-8
R0
.20
CL
Pin #1
2.35
Land Pattern Recommendation
(Unit: mm)
Top View
0.25 B
0.30/0.60
8X-
2X-
AP7361
Document number: DS33626 Rev. 1 - 2
0.65Typ. 0.20/0.30
0.10
C A B
Bottom View
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
Taping Orientation (Note 9)
NEW PRODUCT
For DFN3030E-8
Note:
9. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf
.
AP7361
Document number: DS33626 Rev. 1 - 2
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© Diodes Incorporated
AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE
REGULATOR WITH ENABLE
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NEW PRODUCT
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sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B.
A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2010, Diodes Incorporated
www.diodes.com
AP7361
Document number: DS33626 Rev. 1 - 2
15 of 15
www.diodes.com
December 2010
© Diodes Incorporated