AME5251A Dual 1A, 1.5MHz Synchronous Step

AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n General Description
n Features
The AME5251A is a high efficiency monolithic synchronous dual buck regulator using a constant frequency, current mode architecture. Capable of delivering 1A output
cur-rent each channel over a wide input voltage range from
2.5V to 5.5V.
l High Efficiency: Up to 95%
l Shutdown Mode Draws <1µA Supply Current
l 2.5V to 5.5V Input Range
l Adjustable Output From 0.6V to VIN
1A Output Current Per Channel
Low Dropout Operation: 100% Duty Cycle
No Schottky Diode Required
1.5MHz Constant Frequency PWM Opera
tion
l Small DFN-12A Packages
l Green Products Meet RoHS Standard
l
l
l
l
Supply current with no load is 400µA and drops to<1µA
in shutdown.The 2.5V to 5.5V input Voltage range makes
the AME5251A ideally suited for single Li-Ion batterypowered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.
PWM pulse skipping mode operation provides very low
output ripple voltage for noise sensitive applications. At
very light load, the AME5251A will automatically skip
pulses in pulse skip mode operation to maintain output
regulation.
n Applications
l
l
l
l
l
The internal synchronous switch increases efficiency
and eliminates the need for an external Schottky diode.
Low output voltages are easily supported with the 0.6V
feedback reference voltage. The AME5251A is available
in small DFN-12A packages.
Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
MPS Players
Portable Instruments
n Typical Application
COUT2
VOUT2
L2
ON
AME5251A
VIN1
CIN2
R2
C1
R1
OFF
EN2
SW2
NC2
GND
FB2
FB1
GND
NC1
SW1
EN1
IN1
ON
VOUT1
COUT1
Rev.A.04
IN2
OFF
R3
CIN1
C2
R4
VIN1
L1
1
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Function Block Diagram
Constant
Off-time
Mode
Select
Slope
COMP
VIN
7 IN1
PWM
COMP
FB1 4
0.6V
0.6V
VREF
LOGIC
8 SW1
0.55V
UVDET
NMOS
COMP
Soft
Start
EN1 6
IRCOMP
OSC
9 GND
Constant
Off-time
Mode
Select
Slope
COMP
VIN
1 IN2
PWM
COMP
FB2 10
0.6V
0.6V
VREF
LOGIC
2 SW2
0.55V
UVDET
Soft
Start
EN2 12
OSC
NMOS
COMP
IRCOMP
3 GND
2
Rev. A.04
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Pin Configuration
DFN-12A
(3mmx3mmx0.75mm)
Top View
12
11
10
9
8
7
AME5251A
1
2
3
4
5
6
AME5251A-AVCxxxxxx
1. IN2
2. SW2
3. GND
4. FB1
5. NC1
6. EN1
7. IN1
8. SW1
9. GND
10. FB2
11. NC2
12. EN2
* Die Attach:
Conductive Epoxy
Note:
Connect exposed pad (heat sink on the back) to GND.
n Pin Description
Pin Name
NC
No connection. Not internally connected. Can left floating or connected to GND.
EN
Enable Control Input, active high.
IN
Input Supply Voltage Pin.
Bypass this pin with a capacitor as close to the device as possible.
SW
Switch Node Connection to Inductor.
GND
Ground. Tie directly to ground plane.
FB
Rev.A.04
Pin Description
Output voltage Feedback input.
3
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Ordering Information
AME5251A - x x x xxx xxx
Output Voltage 2
Output Voltage 1
Number of Pins
Package Type
Pin Configuration & Special Feature
Pin Configuration &
Special Feature
A
(DFN-12A)
4
1 IN2
2. SW2
3. GND
4. FB1
5. NC1
6. EN1
7. IN1
8. SW1
9. GND
10. FB2
11. NC2
12. EN2
Package
Type
V: DFN
Number of
Pins
C: 12
Output
Voltage1
ADJ: Adjustable
Output
Voltage2
ADJ: Adjustable
Rev. A.04
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Absolute Maximum Ratings
Parameter
Symbol
Maximum
VIN
-0.3 to 6.5
VEN, V OUT
-0.3 to VIN
VSW
-0.3 to VIN
Input Supply Voltage
EN, VOUT Voltage
SW Voltage
Unit
V
B*
ESD Classification
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
* HBM B: 2000V~3999V
n Recommended Operating Conditions
Parameter
Symbol
Rating
Unit
Supply Voltage Voltage
VIN
2.5 to 5.5
V
Ambient Temperature Range
TA
-40 to +85
o
C
Junction Temperature Range
TJ
-40 to +125
o
C
n Thermal Information
Parameter
Package
Die Attach
Thermal Resistance*
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Symbol
Maximum
θJC
8.5
Unit
o
C/W
DFN-12A
Internal Power Dissipation
Solder Iron (10Sec)**
Conductive Epoxy
θJA
65
PD
1.54
W
350
o
C
* Measure θJC on backside center of Exposed Pad.
** MIL-STD-202G 210F
Rev.A.04
5
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Electrical Specifications
VIN=3.6V, VOUT=2.5V, VFB=0.6V, L=2.2µH, CIN=4.7µF, COUT=10µF, TA=25oC, IMAX=1A unless otherwise specified.
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
Input voltage
VIN
2.5
5.5
V
Adjustable Output Range
Vout
VFB
VIN-0.2
V
Feedback Voltage
VFB
For Adjustable OutputVoltage
0.588
0.612
V
Feedback Pin Bias Current
IFB
VFB=VIN
-50
50
nA
Quiescent Current
IQ
IOUT=0mA, VFB=1V
0.4
0.5
mA
Shutdown Current
ISHDN
VEN=GND
0.1
1
µA
Switch Frequency
fOSC
1.5
1.8
MHz
1.2
0.6
High-side Switch On-Resistance
RDS,ON, LHI
ISW=200mA, VIN=3.6V
0.28
Ω
Low-side Switch On-Resistance
RDS,ON, LO
ISW=200mA, VIN=3.6V
0.25
Ω
Switch Current Limit
ISW,CL
VIN=2.5 to 5.5V
1.4
1.6
A
EN High (Enabled the Device)
VEN,HI
VIN=2.5 to 5.5V
1.5
EN Low (Shutdown the Device)
VEN,LO
VIN=2.5 to 5.5V
Input Undervoltage Lockout
VUVLO
rising edge
Input Undervoltage Lockout
Hysteresis
VUVLO,HYST
Thermal Shutdown Temperature
OTP
Maximum Duty Cycle
DMAX
SW Leakage Current
V
0.4
Shutdown, temperature increasing
1.8
V
0.1
V
o
160
100
EN=0V, VIN=5.0V
VSW=0V or 5.0V
-1
V
C
%
1
µA
Note 1. Spec. for per channel
6
Rev. A.04
AME
AME5251A
n Detailed Description
Main Control Loop
AME5251A uses a constant frequency, current mode
step-down architecture. Both the main (P-channel
MOSFET) and synchronous (N-channel MOSFET)
switches are intermal. During normal operation, the internal top power MOSFET is turned on each cycle when
the oscillator sets the RS latch, and turned off when the
current comparator resets the RS latch. While the top
MOSFET is off, the bottom MOSFET is turned on until
either the inductor current starts to reverse as indicated
by the current reversal comparator IRCMP.
Pulse Skipping Mode Operation
At light loads, the inductor current may reach zero or
reverse on each pulse.The bottom MOSFET is turned off
by the current reversal comparator, IRCMP, and the switch
voltage will ring. This is discontinuous mode operation,
and is normal behavior for the switching regulator.
Short-Circuit Protection
When the output is shorted to ground, the frequency of
the oscillator is reduced to about 180KHz. This frequency
foldback ensures that the inductor current hsa more time
do decay, thereby preventing runaway. The oscillator’ s
frequency will progressively increase to 1.5MHz when
VFB or VOUT rises abole 0V.
Dropout Operation
As the input supply voltage decreases to a value approaching the output voltage, the duty cycle increases
toward the maximum on-time. Further reduction of the
supply voltage forces the main switch to remain on for
more than one cycle until it reaches 100% duty cycle.
The output voltage will then be determined by the input
voltage minus the voltage drop across the P-channel
MOSFET and the inductor.
Rev.A.04
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
n Applincation Information
The basic AME5251A application circuit is shown in
Typical Application Circuit. External component selection is determined by the maximum load current and begins with the selection of the inductor value and followed
by CIN and COUT.
Inductor Selection
For a given input and output voltage, the inductor value
and operating frequency determine the ripple current. The
ripple current DIL increases with higher VIN and decreases
with higher inductance.
∆I L =
1
( f )(L )
VOUT 1 −
VOUT
VIN
A reasonable starting point for setting ripple current is
∆IL=0.4(lmax). The DC current rating of the inductor should
be at least equal to the maximum load current plus half
the ripple current to prevent core saturation. For better
efficiency, choose a low DC-resistance inductor.
CIN and COUT Selection
The input capacitance, CIN is needed to filter the trapezoidal current at the source of the top MOSFET. To
prevent large voltage transients, a low ESR input
capacitorsized for the maximum RMS current must be
used. The maximum RMS capacitor current is given by:
I RMS = I OUT ( MAX )
VOUT
VIN
V IN
−1
VOUT
7
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
This formula has a maximum at VIN=2VOUT, where
IRMS=IOUT/2. This simple worst-case condition is commonly used for design because even significant deviations do not offer much relief. Note that the capacitor
manufacturer ripple current ratings are often based on
2000 hours of life. This makes it advisable to further
derate the capacitor, or choose a capacitor rated at a
higher temperature than required.
The selection of COUT is determined by the effective
series resistance(ESR) that is required to minimize voltage ripple and load step transients. The output ripple,
VOUT, is determined by:
∆VOUT ≅ ∆I L ESR +
1
8 fCOUT
Using Ceramic Input and Output Capacitors
Higher values, lower cost ceramic capacitors are now
becoming available in smaller case sizes. Their high
ripple current, high voltage rating and low ESR make them
ideal for switching regulator applications. However, care
must be taken when these capacitors are used at the
input and output. When a ceramic capacitor is used at
the input and the power is supplied by a wall adapter
through long wires, a load step at the output can induce
ringing at the input, VIN. At best, this ringing can couple
to the output and be mistaken as loop instability. At worst,
a sudden inrush of current through the long wires can
potentially cause a voltage spike at VIN large enough to
damage the part.
Output Voltage Programming
0.6V V OUT
5.5V
R1
FB
AME5251 A
R2
GND
Figure 1: Setting the AME5251A Output Voltage
Thermal Considerations
In most applications the AME5251A does not dissipate much heat due to its high efficiency. But, in applications where the AME5251A is running at high ambient
temperature with low supply voltage and high duty cycles,
such as in dropout, the heat dissipated may exceed the
maximum junction temperature of the part. If the junction
temperature reaches approximately 160OC, both power
switches will be turned off and the SW node will become
high impedance. To avoid the AME5251A from exceeding the maximum junction temperature, the user will need
to do some thermal analysis. The goal of the thermal
analysis is to determine whether the power dissipated
exceeds the maximum junction temperature of the part.
The temperature rise is given by:
TR = (PD )(θ JA )
Where PD is the power dissipated by the regulator and
θJA is the thermal resistance from the junction of the die
to the ambient temperature.
The output voltage is set by an external resistive divider according to the following equation:
VOUT = V REF × 1 +
R1
R2
Where VREF equals to 0.6V typical. The resistive divider allows the FB pin to sense a fraction of the output
voltage as shown in Figure 1.
8
Rev. A.04
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
VIN
2.5V to 5.5V
2.2µH
SW
IN
AME5251A
EN
CFWD
FB
VIN
2.7V to 5.5V
2.2µH
IN
SW
AME5251A
COUT
10µF
CER
150K
GND
CIN
4.7µF
CER
VOUT 1.2V
GND
CIN
4.7µF
CER
150K
FB
EN
CFWD
150K
VOUT 2.5V
COUT
10µF
CER
47.3K
Figure 2: 1.2V Step-Down Regulator
Figure 5: 2.5V Step-Down Regulator
CFWD: 22pF~220pF
CFWD: 22pF~220pF
VIN
3.3 to 5.5V
2.2µH
IN
SW
AME5251A
EN
CFWD
FB
VIN
3.6 to 5.5V
SW
EN
CIN
4.7µF
CER
100K
2.2µH
IN
AME5251A
COUT
10µF
CER
150K
GND
CIN
4.7µF
CER
VOUT 1.5V
FB
GND
CFWD
150K
VOUT 3.3V
COUT
10µF
CER
33.3K
Figure 3: 1.5V Step-Down Regulator
Figure 6: 3.3V Step-Down Regulator
CFWD: 22pF~220pF
CFWD: 22pF~220pF
VIN
2.5 to 5.5V
2.2µH
IN
SW
AME5251A
EN
CIN
4.7µF
CER
VOUT 1.6V
CFWD
FB
GND
150K
COUT
10µF
CER
90K
Figure 4: 1.6V Step-Down Regulator
CFWD: 22pF~220pF
Rev.A.04
9
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
PC Board Layout Checklist
When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the
AME5251A. Check the following in your layout:
1. The power traces, consisting of the GND trace, the SW trace and the VIN trace should be kept short, direct and wide.
2. Does the VFB pin connect directly to the feedback resistors? The resistive divider R2/R1 must be connected between
the (+) plate of COUT and ground.
3. Does the (+) plate of CIN connect to VIN as closely as possible? This capacitor provides the AC current to the internal
power MOSFETs.
4. Keep the switching node, SW, away from the sensitive VFB node.
5. Keep the (-) plates of CIN and COUT as close as possible.
SW1, SW2 should be connected to inductor by wide and short trace
Keep sensitive components away from this trace .
VIN2
1
12
EN2
SW2
2
11
NC2
GND
3
10
FB2
FB1
4
9
GND
NC1
5
8
SW1
EN1
6
7
VIN1
VOUT2
L2
VOUT2
R12
C11
R11, R12, R21, R22 and C 11,
C21 must be kept close to the
ICs FB pin to prevent noise
injection on the FB pin trace and
keeping far away from SW
node.
AME5251A
CIN 2
COUT2
.
R11
VOUT1
NC 1, NC2 pin no
connect or connect
to GND.
R21
R22
L1
GND
The ground area must provide adequate heat
dissipating area to the thermal pad and using
multiple vias to help thermal dissipation .
C21
VOUT 1
COUT1
CIN1
C IN1, CIN2 should be placed
between V IN and GND as
close as possible .
Figure 7: AME5251A Adjustable Voltage Regulator Layout Diagram
10
Rev. A.04
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Application Information
External components selection
Supplier
Inductance
(µ H)
Current Rating
(mA)
DCR
(m Ω )
Dimensions
(mm)
Series
TAIYO YUDEN
2.2
1480
60
3.00 x 3.00 x 1.50
NR 3015
GOTREND
2.2
1500
58
3.85 x 3.85 x 1.80
GTSD32
Sumida
2.2
1500
75
4.50 x 3.20 x 1.55
CDRH2D14
Sumida
4.7
1000
135
4.50 x 3.20 x 1.55
CDRH2D14
TAIYO YUDEN
4.7
1020
120
3.00 x 3.00 x 1.50
NR 3015
GOTREND
4.7
1100
146
3.85 x 3.85 x 1.80
GTSD32
Table 1. Recommended Inductors
Table 2. Recommended Capacitors for CIN and COUT
Rev.A.04
11
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Characterization Curve
Efficiency vs. Output Current
100
100
90
90
80
VIN = 2.7V
VIN = 3.6V
80
70
Efficiency(%)
Efficiency(%)
Efficiency vs. Output Current
60
50
40
30
20
70
60
50
40
30
20
10
VOUT = 2.5V
0
1
10
100
Output Current(mA)
VOUT = 2.5V
10
COUT = 10µF L = 2.2µH
0
1000
1
Efficiency vs. Output Current
Efficiency(%)
Efficiency(%)
80
70
60
50
40
60
50
40
30
20
20
VOUT = 1.5V
1
10
VOUT = 1.5V
10
COUT = 10µF L = 2.2µH
100
VIN = 3.6V
70
30
10
0
1000
1
Output Current(mA)
100
100
90
90
80
Efficiency(%)
60
50
40
30
VOUT = 1.2V
100
Output Current(mA)
1000
60
50
40
30
VOUT = 1.2V
10
10
100
VIN = 5.5V
70
20
COUT = 10µF L = 2.2µH
10
1
10
Output Current(mA)
80
VIN = 2.5V
70
20
COUT = 10µF L = 2.2µH
Efficiency vs. Output Current
Efficiency vs. Output Current
Efficiency(%)
1000
90
VIN = 2.7V
80
12
100
100
90
0
10
Output Current(mA)
Efficiency vs. Output Current
100
0
COUT = 10µF L = 2.2µH
1000
0
1
10
COUT = 10µF L = 2.2µH
100
Output Current(mA)
1000
Rev. A.04
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Characterization Curve (Contd.)
Reference Voltage vs. Temperature
Frequency vs. Temperature
1.90
1.85
1.80
1.75
0.620
0.610
Frequency(MHz)
Reference Voltage(V)
0.615
0.605
0.600
0.595
0.590
VIN = 3.6V
-25
0
+25
+50
+75
Temperature(OC)
+100
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
0.585
0.580
-50
1.70
1.65
1.60
1.55
1.50
+125
VIN = 3.6V
-50
1.70
1.90
1.65
1.89
+75
+100
+125
VOUT = 1.8V
VIN = 3.6V
1.88
1.87
1.55
Output Voltage(V)
Frequency(MHz)
+50
Output Voltage vs. Output Current
1.50
1.45
1.40
1.35
1.30
1.25
1.86
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.20
1.78
1.15
1.10
2.5
3.0
3.5
4.0
VIN(V)
4.5
5.0
1.77
0
5.5
Current Limit(A)
VIN = 3.3V
VOUT = 1.2V
-25
-10
+5
+20 +35 +50 +65 +80 +95 +110 +125
Temperature (oC)
100
200
300
400
500
600
700
Output Current(mA)
800
900 1000
Current Limit vs. Temperature
Current Limit vs. Temperature
Current Limit(A)
+25
O
1.60
Rev.A.04
+0
Temperature( C)
Frequency vs. Supply Voltage
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
-40
-25
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
-40
VIN = 3.6V
VOUT = 1.2V
-25
-10
+5
+20
+35 +50
+65 +80
o
+95 +110 +125
Temperature ( C)
13
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Characterization Curve (Contd.)
Current Limit(A)
Current Limit vs. Temperature
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
-40
Light Load Mode Output Voltage Ripple
VIN = 5.0V
VOUT = 1.2V
1
2
-25
-10
+5 +20 +35 +50 +65 +80 +95 +110 +125
o
3
Temperature ( C)
400nS / div
VIN = 3.6V
VOUT = 1.2V
IOUT = 50mA
1) VSW= 2V/div
2) VOUT = 10mV/div
3) IL = 500mA/div
Heavy Load Mode Output Voltage Ripple
Load Step
1
2
3
400nS / div
14
VIN = 3.6V
VOUT = 1.2V
IOUT = 1A
VIN = 3.6V
VOUT = 1.8V
IOUT = 0A~1A~0A
1) VSW= 2V/div
2) VOUT = 10mV/div
3) IL = 500mA/div
1) VOUT= 100mV/div
2) IOUT = 500mA/div
Rev. A.04
AME
AME5251A
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
n Characterization Curve (Contd.)
Load Step
Load Step
VIN = 3.6V
VOUT = 1.8V
IOUT = 50mA~1A~50mA
VIN = 3.6V
VOUT = 1.8V
IOUT = 200mA~1A~200mA
1) VOUT= 100mV/div
2) IOUT = 500mA/div
1) VOUT= 100mV/div
2) IOUT = 500mA/div
Power On from EN
VOUT = 1.2V
IOUT = 1A
1) EN= 2V/div
2) VOUT = 500mV/div
3) IL = 1A/div
Rev.A.04
Power Off from EN
VIN = 3.6V
VOUT = 1.8V
IOUT = 1A
1) EN = 2V/div
2) VOUT = 2V/div
3) IL = 500mA/div
15
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Tape and Reel Dimension
DFN-12A
(3mmx3mmx0.75mm)
P
PIN 1
W
AME
AME
Carrier Tape, Number of Components Per Reel and Reel Size
16
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
DFN-12A
(3x3x0.75mm)
12.0±0.1 mm
4.0±0.1 mm
5000pcs
330±1 mm
Rev. A.04
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Package Dimension
DFN-12A
(3mmx3mmx0.75mm)
e
D
L
k
E1
E
D1
PIN 1 IDENTIFICATION
b
TOP VIEW
P IN 1
BOTTOM VIEW
A1
A3
A
REAR VIEW
SYMBOLS
INCHES
MIN
MAX
MIN
MAX
A
0.700
0.800
0.028
0.031
A1
0.000
0.050
0.000
0.002
A3
0.203REF.
0.008REF.
D
2.924
3.076
0.115
0.121
E
2.924
3.076
0.115
0.121
D1
2.450
2.650
0.096
0.104
E1
1.500
1.700
0.059
0.067
k
b
e
L
Rev.A.04
MILLIMETERS
0.200MIN.
0.150
0.250
0.450TYP.
0.324
0.476
0.008MIN
0.006
0.010
0.018TYP.
0.013
0.019
17
AME
Dual 1A, 1.5MHz Synchronous
Step-Down Converter
AME5251A
n Lead Pattern
0.000 BSC
DFN-12A
(3mmx3mmx0.75mm)
1.050 BSC
1.800 BSC
2.750 BSC
0.000 BSC
1.375 BSC
PIN1
[1] 0.450 BSC
0.250 BSC
3 X 3 PKG REF.
Note:
1. Lead pattern unit description:
BSC: Basic. Represents theoretical exact dimension or dimension target.
2. Dimensions in Millimeters.
3. General tolerance +0.05mm unless otherwise specified.
18
Rev. A.04
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
 AME, Inc. , January 2014
Document: 1283-DS5251A-A.04
Corporate Headquarter
AME, Inc.
8F, 12, WenHu St., Nei-Hu
Taipei 114, Taiwan.
Tel: 886 2 2627-8687
Fax: 886 2 2659-2989