LINEAGEPOWER ATM030A0X3-SRH

Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7Vdc – 4.0Vdc input; 0.8 to 2.0Vdc; 30A Output Current
RoHS Compliant
Features
ƒ
Compliant to RoHS EU Directive 2002/95/EC
ƒ
Compatible in a Pb-free or SnPb reflow
environment
ƒ
ƒ
Delivers up to 30A of output current
ƒ
ƒ
ƒ
Input voltage range from 2.7V to 4.0Vdc
High efficiency – 92% @ 1.8V full load
(VIN=3.3Vdc)
Output voltage programmable from 0.8 to 2.0Vdc
Small size and low profile:
o 33.0 mm x 9.1 mm x 13.5 mm
o (1.30 in. x 0.36 in. x 0.53 in.)
Applications
ƒ
Distributed power architectures
ƒ
Intermediate bus voltage applications
ƒ
Telecommunications equipment
ƒ
Servers and storage applications
ƒ
Networking equipment
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
Monotonic start-up into pre-biased output
Output voltage sequencing (EZ-SEQUENCE TM)
Remote On/Off
Remote Sense
Over current and Over temperature protection
Parallel operation with active current sharing
Wide operating temperature range (-40°C to 85°C)
UL* 60950 Recognized, CSA† C22.2 No. 60950-00
‡
rd
Certified, and VDE 0805 (EN60950-1 3 edition)
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
The Austin MegaLynx ATM series SMT power modules are non-isolated DC-DC converters in an industry standard
package that can deliver up to 30A of output current with a full load efficiency of 92% at 1.8Vdc output voltage (VIN =
3.3Vdc). These modules operate off an input voltage from 2.7 to 4.0Vdc and provide an output voltage that is
programmable from 0.8 to 2.0Vdc. They have a sequencing feature that enables designers to implement various
types of output voltage sequencing when powering multiple modules on the board. Additional features include
remote On/Off, adjustable output voltage, remote sense, over current, over temperature protection and active
current sharing between modules.
* UL is a registered trademark of Underwriters Laboratories, Inc.
†
CSA is a registered trademark of Canadian Standards Association.
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
‡
Document No: DS06-130 ver. 1.05
PDF No: ATM030A0X3-SR_ds.pdf
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute
stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those
given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can
adversely affect the device reliability.
Parameter
Device
Symbol
Min
Max
Unit
All
VIN
-0.3
4.0
Vdc
Sequencing pin voltage
All
VsEQ
-0.3
4.0
Vdc
Operating Ambient Temperature
All
TA
-40
85
°C
All
Tstg
-55
125
°C
Input Voltage
Continuous
(see Thermal Considerations section)
Storage Temperature
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Device
Symbol
Min
Typ
Max
Unit
Operating Input Voltage
All
VIN
2.7
3.3
4.0
Vdc
Maximum Input Current
(VIN= VIN,min , VO= VO,set, IO=IO, max)
All
IIN,max
20
Adc
Inrush Transient
All
I t
2
1
A s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN=2.7V to 4.0V, IO=
IOmax ; See Figure 1)
All
100
mAp-p
Input Ripple Rejection (120Hz)
All
50
dB
LINEAGE POWER
2
2
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Electrical Specifications (continued)
Parameter
Output Voltage Set-point
Device
Symbol
Min
Typ
Max
Unit
All
VO, set
-1.5
⎯
+1.5
% VO, set
All
VO, set
–3.0
⎯
+3.0
% VO, set
2.0
Vdc
⎯
0.1
% VO, set
(VIN=VIN,nom, IO=IO, nom, Tref=25°C)
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range
Selected by an external resistor
All
0.8
Line (VIN=VIN, min to VIN, max)
All
⎯
Load (IO=IO, min to IO, max)
All
⎯
⎯
0.4
% VO, set
Temperature (Tref=TA, min to TA, max)
All
⎯
0.5
1
% VO, set
Vo ≤ 2.0V
⎯
50
mVpk-pk
⎯
2,000
μF
⎯
10,000
μF
30
Adc
Output Regulation
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
COUT = 0.1μF // 10 μF ceramic capacitors)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance
ESR ≥ 1 mΩ
All
CO, max
0
ESR ≥ 10 mΩ
All
CO, max
0
Vo ≤ 3.63V
Io
0
Output Current Limit Inception (Hiccup Mode)
All
IO, lim
104
140
160
% Iomax
Output Short-Circuit Current
All
IO, s/c
⎯
3.5
⎯
Adc
Output Current
(VO≤250mV) ( Hiccup Mode )
Efficiency
VO,set = 0.8dc
η
83.5
%
VIN=VIN, nom, TA=25°C
VO,set = 1.25Vdc
η
87.9
%
IO=IO, max , VO= VO,set
VO,set = 1.8Vdc
η
91.6
%
All
fsw
⎯
270
⎯
kHz
(dIO/dt=5A/μs; VIN=VIN, nom; TA=25°C)
Load Change from Io= 50% to 100% of
IO,max; No external output capacitors
Peak Deviation
All
Vpk
⎯
380
⎯
mV
Settling Time (VO<10% peak deviation)
All
ts
⎯
50
⎯
μs
(dIO/dt=5A/μs; VIN=VIN, nom; TA=25°C)
Load Change from IO= 100% to 50%of IO, max:
No external output capacitors
Peak Deviation
All
Vpk
⎯
380
⎯
mV
Settling Time (VO<10% peak deviation)
All
ts
⎯
50
⎯
μs
Switching Frequency, Fixed
Dynamic Load Response
LINEAGE POWER
3
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Electrical Specifications (continued)
Parameter
Device
Symbol
Min
Typ
Max
Unit
(dIO/dt=5A/μs; VIN=VIN, nom; TA=25°C)
Load Change from Io= 50% to 100% of Io,max;
2x150 μF polymer capacitor
Peak Deviation
All
Vpk
⎯
350
⎯
mV
Settling Time (VO<10% peak deviation)
All
ts
⎯
40
⎯
μs
(dIO/dt=5A/μs; VIN=VIN, nom; TA=25°C)
Load Change from Io= 100% to 50%of IO,max:
2x150 μF polymer capacitor
Peak Deviation
All
Vpk
⎯
250
⎯
mV
Settling Time (VO<10% peak deviation)
All
ts
⎯
60
⎯
μs
Dynamic Load Response
General Specifications
Parameter
Min
Calculated MTBF (VO= 1.2Vdc, IO= 0.8IO, max, TA=40°C)
Per Telecordia Method
Weight
LINEAGE POWER
Typ
Max
Hours
3,443,380
⎯
6.2 (0.22)
Unit
⎯
g (oz.)
4
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter
Device
Symbol
Min
Typ
Max
Unit
On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
Signal referenced to GND)
Logic High (Module OFF)
Input High Current
All
IIH
0.5
⎯
3.3
mA
Input High Voltage
All
VIH
2.5
⎯
VIN, max
V
Input Low Current
All
IIL
⎯
⎯
200
µA
Input Low Voltage
All
VIL
-0.3
⎯
1.2
V
All
Tdelay
―
2.5
5
msec
All
Tdelay
―
2.5
5
msec
All
Trise
2
10
msec
3.0
% VO, set
Logic Low (Module ON)
Turn-On Delay and Rise Times
(VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state)
Case 1: On/Off input is enabled and then
input power is applied (delay from instant at
which VIN = VIN, min until Vo = 10% of Vo, set)
Case 2: Input power is applied for at least one second and
then the On/Off input is enabled (delay from instant at which
Von/Off is enabled until Vo = 10% of Vo, set)
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set)
Output voltage overshoot
o
IO = IO, max; VIN, min – VIN, max, TA = 25 C
Remote Sense Range
All
Over temperature Protection
All
Tref
All
dVSEQ/dt
to application of voltage on SEQ pin)
All
TsEQ-delay
Tracking Accuracy
All
VSEQ –Vo
100
200
mV
VSEQ –Vo
200
400
mV
2.2
Vdc
⎯
⎯
0.5
V
⎯
125
⎯
°C
—
2
V/msec
(See Thermal Consideration section)
Sequencing Slew rate capability
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Sequencing Delay time (Delay from VIN, min
Power-up (2V/ms)
Power-down (1V/ms)
10
msec
(VIN, min to VIN, max; IO, min - IO, max VSEQ < Vo)
Input Undervoltage Lockout
Turn-on Threshold
All
Turn-off Threshold
All
Forced Load Share Accuracy
-P
Number of units in Parallel
-P
LINEAGE POWER
⎯
1.7
Vdc
10
% Io
5
5
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR & -SRH (0.8V, 30A) at 25oC.
95
35
Vin = 3.0V
85
Vin = 3.3V
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
90
Vin = 3.9V
80
75
70
65
0
5
10
15
20
25
2.5m/s
500 LFM
30
25
1m/s
200 LFM
1.5m/s
300 LFM
15
2.0m/s
400 LFM
10
5
0
30
30
40
50
60
70
80
O
OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current.
0.5m/s
100 LFM
NC
20
AMBIENT TEMPERATURE, TA C
Figure 4. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
35
OUTPUT CURRENT, Io (A)
VO (V) (20mV/div)
OUTPUT VOLTAGE
2.5m/s (500LFM)
30
NC
0.5m/s (100LFM)
25
1m/s (200LFM)
1.5m/s (300LFM)
20
2m/s (400LFM)
15
30
LINEAGE POWER
OUTPUT VOLTAGE
VO (V) (1V/div)
OUTPUT VOLTAGE
Figure 3. Transient Response to Dynamic Load Change
from 0% to 50% to 0% of full load.
60
70
80
Figure 5. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
VIN (V) (1V/div)
TIME, t (50μs /div)
50
O
INPUT VOLTAGE
IO (A) (5Adiv)
OUTPUT CURRENT,
VO (V) (200mV/div)
Figure 2. Typical output ripple and noise (VIN = VIN,NOM,
Io = Io,max).
40
AMBIENT TEMPERATURE, TA C
TIME, t (1μs/div)
TIME, t (5ms/div)
Figure 6. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
6
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR and -SRH (1.25V, 30A) at 25oC.
95
35
Vin = 3.0V
Vin = 3.3V
OUTPUT CURRENT, Io (A)
90
EFFICIENCY, η (%)
2.5m/s
500 LFM
30
Vin = 3.9V
85
80
75
70
65
0
5
10
15
20
25
25
1m/s
200 LFM
1.5m/s
300 LFM
15
2.0m/s
400 LFM
10
5
0
30
30
40
50
60
70
80
O
AMBIENT TEMPERATURE, TA C
OUTPUT CURRENT, IO (A)
Figure 7. Converter Efficiency versus Output Current.
0.5m/s
100 LFM
NC
20
Figure 10. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
35
OUTPUT CURRENT, Io (A)
VO (V) (20mV/div)
OUTPUT VOLTAGE
2.5m/s (500LFM)
2m/s (400LFM)
30
NC
0.5m/s (100LFM)
25
1m/s (200LFM)
1.5m/s (300LFM)
20
30
LINEAGE POWER
70
80
OUTPUT VOLTAGE
VO (V) (1V/div)
Figure 11. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
VIN (V) (1V/div)
VO (V) (200mV/div)
IO (A) (5Adiv)
Figure 9. Transient Response to Dynamic Load Change
from 0% to 50% to 0% of full load.
60
AMBIENT TEMPERATURE, TA C
INPUT VOLTAGE
OUTPUT VOLTAGE
OUTPUT CURRENT,
TIME, t (50μs /div)
50
O
TIME, t (1μs/div)
Figure 8. Typical output ripple and noise (VIN = VIN,NOM,
Io = Io,max).
40
TIME, t (5ms/div)
Figure 12. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
7
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR and –SRH (1.8V, 30A) at 25oC.
35
100
Vin = 3.0V
90
Vin = 3.3V
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
95
Vin = 3.9V
85
80
75
70
0
2.5m/s
500 LFM
30
5
10
15
20
25
25
NC
20
1m/s
200 LFM
15
1.5m/s
300 LFM
2.0m/s
400 LFM
10
5
0
30
30
40
50
60
70
80
O
OUTPUT CURRENT, IO (A)
Figure 13. Converter Efficiency versus Output
Current.
0.5m/s
100 LFM
AMBIENT TEMPERATURE, TA C
Figure 16. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
35
OUTPUT CURRENT, Io (A)
VO (V) (20mV/div)
OUTPUT VOLTAGE
2.5m/s (500LFM)
30
NC
0.5m/s (100LFM)
25
1m/s (200LFM)
1.5m/s (300LFM)
20
2m/s (400LFM)
15
30
Figure 15. Transient Response to Dynamic Load
Change from 0% to 50% to 0% of full load.
LINEAGE POWER
60
70
80
OUTPUT VOLTAGE
VO (V) (1V/div)
Figure 17. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
VIN (V) (1V/div)
VO (V) (200mV/div)
IO (A) (5A/div)
TIME, t (50μs /div)
50
O
INPUT VOLTAGE
OUTPUT VOLTAGE
OUTPUT CURRENT,
Figure 14. Typical output ripple and noise (VIN =
VIN,NOM, Io = Io,max).
40
AMBIENT TEMPERATURE, TA C
TIME, t (1μs/div)
TIME, t (5ms/div)
Figure 18. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
8
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR and -SRH (2.0V, 30A) at 25oC.
100
35
Vin = 3.0V
90
Vin = 3.3V
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
95
Vin = 3.9V
85
80
75
70
0
2.5m/s
500 LFM
30
5
10
15
20
25
25
1m/s
200 LFM
1.5m/s
300 LFM
15
2.0m/s
400 LFM
10
5
0
30
30
40
50
60
70
80
O
OUTPUT CURRENT, IO (A)
Figure 19. Converter Efficiency versus Output
Current.
0.5m/s
100 LFM
NC
20
AMBIENT TEMPERATURE, TA C
Figure 22. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
35
OUTPUT CURRENT, Io (A)
VO (V) (20mV/div)
OUTPUT VOLTAGE
2.5m/s (500LFM)
30
NC
25
0.5m/s (100LFM)
1m/s (200LFM)
1.5m/s (300LFM)
20
2m/s (400LFM)
15
30
Figure 21. Transient Response to Dynamic Load
Change from 0% to 50% to 0% of full load.
LINEAGE POWER
60
70
80
OUTPUT VOLTAGE
VO (V) (1V/div)
Figure 23. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
VIN (V) (1V/div)
VO (V) (200mV/div)
IO (A) (5A/div)
TIME, t (50μs /div)
50
O
INPUT VOLTAGE
OUTPUT VOLTAGE
OUTPUT CURRENT,
Figure 20. Typical output ripple and noise (VIN =
VIN,NOM, Io = Io,max).
40
AMBIENT TEMPERATURE, TA C
TIME, t (1μs/div)
TIME, t (5ms/div)
Figure 24. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
9
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Design Considerations
CURRENT PROBE
TO OSCILLOSCOPE
LTEST
VIN(+)
BATTERY
1μH
CS
CIN
220μF
Min
150μF
E.S.R.<0.1Ω
@ 20°C 100kHz
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Figure 25. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
VO (+)
RESISTIVE
LOAD
1uF
.
10uF
SCOPE
COM
The ATM030 module should be connected to a lowimpedance source. A highly inductive source can
affect the stability of the module. An input capacitor
must be placed directly adjacent to the input pin of
the module, to minimize input ripple voltage and
ensure module stability.
To minimize input voltage ripple, low-ESR ceramic
capacitors are recommended at the input of the
module. Figure 28 shows the input ripple voltage for
various output voltages at 30A of load current with
1x47 µF or 2x47 µF ceramic capacitors and an
input of 3.3V.
100
Input Ripple Voltage (mVp-p)
Test Configurations
90
80
70
60
1 x 47uF
50
2 x 47uF
40
0.5
1
1.5
2
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 26. Output Ripple and Noise Test Setup.
Rdistribution
Rcontact
Rcontact
VIN(+)
RLOAD
VO
VIN
Rdistribution
Rcontact
Rcontact
COM
Rdistribution
VO
Rdistribution
COM
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 27. Output Voltage and Efficiency Test
Setup.
VO. IO
Efficiency
η =
LINEAGE POWER
VIN. IIN
x
100 %
Output Voltage (Vdc)
Figure 28. Input ripple voltage for various
output voltages with 1x47 µF or 2x47 µF ceramic
capacitors at the input (30A load). Input voltage
is 3.3V.
Safety Considerations
For safety agency approval the power module must
be installed in compliance with the spacing and
separation requirements of the end-use safety
agency standards, i.e., UL 60950, CSA C22.2 No.
60950-00, EN60950 (VDE 0850) (IEC60950, 3rd
edition) Licensed.
For the converter output to be considered meeting
the requirements of safety extra-low voltage
(SELV), the input must meet SELV requirements.
The power module has extra-low voltage (ELV)
outputs when all inputs are ELV.
An input fuse for the module is recommended. As
an option to using a fuse, no fuse is required, if the
module is powered by a power source with current
limit protection and the module is evaluated in the
end-use equipment.
10
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Feature Descriptions
Remote On/Off
The ATM030 SMT power modules feature a On/Off
pin for remote On/Off operation. If not using the
On/Off pin, connect the pin to ground (the module
will be ON). The On/Off signal (Von/off) is referenced
to ground. Circuit configuration for remote On/Off
operation of the module using the On/Off pin is
shown in Figure 29.
During a Logic High on the On/Off pin (transistor Q1
is OFF), the module remains OFF. The external
resistor RX should be chosen to maintain 2.5V
minimum on the On/Off pin to ensure that the
module is OFF when transistor Qx is in the OFF
state. A suitable values for RX is 3K for 5Vin.
During Logic-Low when QX is turned ON, the
module is turned ON.
VIN+
MODULE
R1
The amount of power delivered by the module is
defined as the output voltage multiplied by the
output current (Vo x Io). When using Remote
Sense, the output voltage of the module can
increase, which if the same output is maintained,
increases the power output by the module. Make
sure that the maximum output power of the module
remains at or below the maximum rated power.
When the Remote Sense feature is not being used,
connect the Remote Sense pin to output of the
module.
R d istrib u tio n
R c o n ta c t
R c o n ta c t
V IN (+ )
R d istrib u tio n
VO
S e ns e
R LO AD
R d istrib u tio n
R c o n ta c t
R c o n ta c t
COM
R d istrib u tio n
COM
Figure 30. Effective Circuit Configuration for
Remote Sense operation.
Therm al SD
Over Current Protection
I ON/OFF
ON/OFF
1K
PW M Enable
+
VON/OFF
100K
Q1
10K
GN D
_
Figure 29. Remote On/Off Implementation
using ON/OFF .
The On/Off pin can also be used to synchronize the
output voltage start-up and shutdown of multiple
modules in parallel. By connecting On/Off pins of
multiple modules, the output start-up can be
synchronized (please refer to characterization
curves). When On/Off pins are connected together,
all modules will shutdown if any one of the modules
gets disabled due to undervoltage lockout or over
temperature protection.
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current
limiting continuously. At the point of current-limit
inception, the unit enters hiccup mode. The unit
operates normally once the output current is
brought back into its specified range. The average
output current during hiccup is 10% IO, max.
Over Temperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit
will shutdown if the overtemperature threshold of
125oC is exceeded at the thermal reference point
Tref. The thermal shutdown is not intended as a
guarantee that the unit will survive temperatures
beyond its rating. Once the unit goes into thermal
shutdown it will then wait to cool before attempting
to restart.
Input Under Voltage Lockout
Remote Sense
The ATM030 power modules have a Remote Sense
feature to minimize the effects of distribution losses
by regulating the voltage at the Remote Sense pin
(See Figure 30). The voltage between the Sense
pin and Vo pin must not exceed 0.5V.
LINEAGE POWER
At input voltages below the input undervoltage
lockout limit, the module operation is disabled. The
module will begin to operate at an input voltage
above the undervoltage lockout turn-on threshold.
11
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Output Voltage Programming
Voltage Sequencing
The output voltage of the ATM030 module can be
programmed to any voltage from 0.8dc to 2.0Vdc by
connecting a resistor (shown as Rtrim in Figure 31)
between Trim and GND pins of the module.
Without an external resistor between Trim and GND
pins, the output of the module will be 0.8Vdc. To
calculate the value of the trim resistor, Rtrim for a
desired output voltage, use the following equation:
The Austin MegaLynxTM series of modules include a
sequencing feature that enables users to implement
various types of output voltage sequencing in their
applications. This is accomplished via an additional
sequencing pin. When not using the sequencing
feature, either leave the SEQ pin unconnected or
tied to VIN.
⎡ 1200
⎤
Rtrim = ⎢
− 100⎥ Ω
⎣Vo − 0.80
⎦
Vo
Rmargin-down
Rtrim is the external resistor in Ω
Austin Lynx or
Lynx II Series
Vo is the desired output voltage
By using a ±0.5% tolerance trim resistor with a TC
of ±100ppm, a set point tolerance of ±1.5% can be
achieved as specified in the electrical specification.
The POL Programming Tool, available at
www.lineagepower.com under the Design Tools
section, helps determine the required external trim
resistor needed for a specific output voltage.
Q2
Trim
Rmargin-up
Rtrim
Q1
V IN(+)
V O(+)
ON/OFF
TRIM
GND
LOAD
Rtrim
GND
Figure 31. Circuit configuration to program
output voltage using an external resistor.
Voltage Margining
Output voltage margining can be implemented in
the Austin MegaLynxTM modules by connecting a
resistor, Rmargin-up, from the Trim pin to the ground
pin for margining-up the output voltage and by
connecting a resistor, Rmargin-down, from the Trim pin
to output pin for margining-down. Figure 32 shows
the circuit configuration for output voltage
margining. The POL Programming Tool, available
at www.lineagepower.com under the Design Tools
section, also calculates the values of Rmargin-up and
Rmargin-down for a specific output voltage and %
margin. Please consult your local Lineage Power
technical representative for additional details.
LINEAGE POWER
Figure 32. Circuit Configuration for margining
Output voltage.
For proper voltage sequencing, first, input voltage is
applied to the module. The On/Off pin of the
module is or tied to GND so that the module is ON
by default. After applying input voltage to the
module, a minimum of 10msec delay is required
before applying voltage on the SEQ pin. After
10msec delay, an analog voltage is applied to the
SEQ pin and the output voltage of the module will
track this voltage on a one-to-one volt bases until
output reaches the set-point voltage. To initiate
simultaneous shutdown of the modules, the SEQ
pin voltage is lowered in a controlled manner.
Output voltage of the modules tracks the voltages
below their set-point voltages on a one-to-one
basis. A valid input voltage must be maintained
until the tracking and output voltages reach ground
potential.
TM
When using the EZ-SEQUENCE feature to
control start-up of the module, pre-bias immunity
feature during start-up is disabled. The pre-bias
immunity feature of the module relies on the module
being in the diode-mode during start-up. When
TM
using the EZ-SEQUENCE feature, modules goes
through an internal set-up time of 10msec, and will
be in synchronous rectification mode when voltage
12
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
at the SEQ pin is applied. This will result in sinking
current in the module if pre-bias voltage is present
at the output of the module. When pre-bias
immunity during start-up is required, the EZSEQUENCETM feature must be disabled. For
TM
additional guidelines on using EZ-SEQUENCE
feature of Austin MegaLynx modules, contact the
Tyco Power Systems Technical representative for
the application note on output voltage sequencing.
Active Load Sharing (-P Option)
For additional power requirements, the ATM030
series power module is also available with a parallel
option. Up to five modules can be configured, in
parallel, with active load sharing. Good layout
techniques should be observed when using multiple
units in parallel. To implement forced load sharing,
the following connections should be made:
•
The share pins of all units in parallel must be
connected together. The path of these
connections should be as direct as possible.
•
All remote-sense pins should be connected to
the power bus at the same point, i.e., connect
all the SENSE(+) pins to the (+) side of the bus.
Close proximity and directness are necessary
for good noise immunity
Some special considerations apply for design of
converters in parallel operation:
When sizing the number of modules required for
parallel operation, take note of the fact that current
sharing has some tolerance. In addition, under
transient condtions such as a dynamic load change
and during startup, all converter output currents will
not be equal. To allow for such variation and avoid
the likelihood of a converter shutting off due to a
current overload, the total capacity of the paralleled
system should be no more than 75% of the sum of
the individual converters. As an example, for a
system of four ATM030A0X3-SR converters the
parallel, the total current drawn should be less that
75% of 4 x 30A or 90A.
•
•
All modules should be turned on and off
together. This is so that all modules come up at
the same time avoiding the problem of one
converter sourcing current into the other
leading to an overcurrent trip condition. To
ensure that all modules come up
simultaneously, the on/off pins of all paralleled
converters should be tied together and the
converters enabled and disabled using the
on/off pin.
•
The share bus is not designed for redundant
operation and the system will be non-functional
upon failure of one of the unit when multiple
units are in parallel. In particular, if one of the
converters shuts down during operation, the
other converters may also shut down due to
their outputs hitting current limit. In such a
situation, unless a coordinated restart is
ensured, the system may never properly restart
since different converters will try to restart at
different times causing an overload condition
and subsequent shutdown. This situation can
be avoided by having an external output
voltage monitor circuit that detects a shutdown
condition and forces all converters to shut
down and restart together.
When not using the parallel feature, leave the share
pin open.
When sizing the number of modules required
for parallel operation, take note of the fact that
current sharing has some tolerance. In
addition, under transient condtions such as a
dynamic load change and during startup, all
converter output currents will not be equal. To
allow for such variation and avoid the likelihood
of a converter shutting off due to a current
overload, the total capacity of the paralleled
system should be no more than 75% of the
sum of the individual converters. As an
example, for a system of four ATM030A0X3SR converters the parallel, the total current
drawn should be less that 75% of (4 x 30A) ,
i.e. less than 90A.
LINEAGE POWER
13
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should
always be provided to help ensure reliable
operation.
Considerations include ambient temperature,
airflow, module power dissipation, and the need for
increased reliability. A reduction in the operating
temperature of the module will result in an increase
in reliability. The thermal data presented here is
based on physical measurements taken in a wind
tunnel. The test set-up is shown in Figure 33. Note
that the airflow is parallel to the long axis of the
module as shown in Figure 34. The derating data
applies to airflow in either direction of the module’s
long axis.
Figure 34. Airflow direction for thermal testing.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
12.7_
(0.50)
Probe Location
for measuring
airflow and
ambient
temperature
Figure 35. Tref Temperature measurement
location.
The thermal reference points, Tref used in the
specifications are shown in Figure 35. For reliable
operation the temperatures at these points should
not exceed 125oC. The output power of the module
should not exceed the rated power of the module
(Vo,set x Io,max).
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame BoardMounted Power Modules” for a detailed discussion
of thermal aspects including maximum device
temperatures.
Air
flow
Figure 33. Thermal Test Up
LINEAGE POWER
14
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Mechanical Outline of Module (ATM030A0X3-SRPH)
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Note: For the ATM030A0X3-SRH module, the SHARE pin is omitted since these modules are not
capable of being paralleled.
LINEAGE POWER
15
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Recommended Pad Layout (ATM030A0X3-SRPH)
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Pin 8
Pin 10
PIN
FUNCTION
PIN
1
On/Off
6
FUNCTION
Trim
2
VIN
7
Sense
3
SEQ
8
GND
4
GND
9
SHARE
5
VOUT
10
GND
Note: For the ATM030A0X3-SRH module, the SHARE pin is not present since these modules are not
capable of being paralleled.
LINEAGE POWER
16
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Mechanical Outline of Module (ATM030A0X3-SRP)
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Note: For the ATM030A0X3-SR module, the SHARE pin is omitted since these modules are not capable
of being paralleled.
LINEAGE POWER
17
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Recommended Pad Layout (ATM030A0X3-SRP)
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
PIN
FUNCTION
PIN
1
On/Off
6
FUNCTION
Trim
2
VIN
7
Sense
3
SEQ
8
No Pin
4
GND
9
Share
5
VOUT
10
No Pin
Note: For the ATM030A0X3-SR module, the SHARE pin is not used since these modules are not
capable of being paralleled.
LINEAGE POWER
18
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Packaging Details
The ATM030 SMT module is supplied in tape & reel as standard. Modules are shipped in quantities of 200 modules
per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions
Outside diameter:
Inside diameter:
Tape Width:
LINEAGE POWER
330.2 (13.0)
177.8 (7.0)
44.0 (1.73)
19
Data Sheet
October 21, 2009
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Surface Mount Information
Pick and Place
The Austin MegaLynxTM SMT modules use an open
frame construction and are designed for a fully
automated assembly process. The modules are fitted
with a label designed to provide a large surface area
for pick and place operations. The label meets all the
requirements for surface mount processing, as well as
safety standards, and is able to withstand reflow
o
temperatures of up to 300 C. The label also carries
product information such as product code, serial
number and location of manufacture.
In a conventional Tin/Lead (Sn/Pb) solder process
peak reflow temperatures are limited to less than
235oC. Typically, the eutectic solder melts at 183oC,
wets the land, and subsequently wicks the device
connection. Sufficient time must be allowed to fuse
the plating on the connection to ensure a reliable
solder joint. There are several types of SMT reflow
technologies currently used in the industry. These
surface mount power modules can be reliably
soldered using natural forced convection, IR (radiant
infrared), or a combination of convection/IR. For
reliable soldering the solder reflow profile should be
established by accurately measuring the modules CP
connector temperatures.
300
P eak Temp 235oC
REFLOW TEMP (°C)
250
200
150
So ak zo ne
30-240s
100
50
Figure 36. Pick and Place Location.
0
The ATM030 modules are lead free modules and can
be soldered either in a lead-free solder process or in a
conventional Tin/Lead (Sn/Pb) process. It is
recommended that the customer review data sheets
in order to customize the solder reflow profile for each
application board assembly. The following
instructions must be observed when soldering these
units. Failure to observe these instructions may result
in the failure of or cause damage to the modules, and
can adversely affect long-term reliability.
LINEAGE POWER
REFLOW TIME (S)
Figure 37. Reflow Profile for Tin/Lead (Sn/Pb)
process.
240
235
MAX TEMP SOLDER (°C)
Tin Lead Soldering
Tlim above
205oC
P reheat zo ne
max 4oCs -1
Nozzle Recommendations
The module weight has been kept to a minimum by
using open frame construction. Even so, these
modules have a relatively large mass when compared
to conventional SMT components. Variables such as
nozzle size, tip style, vacuum pressure and pick &
placement speed should be considered to optimize
this process. The minimum recommended inside
nozzle diameter for reliable operation is 3mm. The
maximum nozzle outer diameter, which will safely fit
within the allowable component spacing, is 5 mm
max.
Co o ling
zo ne
1-4oCs -1
Heat zo ne
max 4oCs -1
230
225
220
215
210
205
200
0
10
20
30
40
50
60
Figure 38. Time Limit Curve Above 205oC Reflow
for Tin Lead (Sn/Pb) process.
20
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Surface Mount Information (continued)
Lead Free Soldering
The –Z version MegaLynx ATM SMT modules are
lead-free (Pb-free) and RoHS compliant and are both
forward and backward compatible in a Pb-free and a
SnPb soldering process. Failure to observe the
instructions below may result in the failure of or cause
damage to the modules and can adversely affect
long-term reliability.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C
(Moisture/Reflow Sensitivity Classification for
Nonhermetic Solid State Surface Mount Devices) for
both Pb-free solder profiles and MSL classification
procedures. This standard provides a recommended
forced-air-convection reflow profile based on the
volume and thickness of the package (table 4-2). The
suggested Pb-free solder paste is Sn/Ag/Cu (SAC).
The recommended linear reflow profile using
Sn/Ag/Cu solder is shown in Figure 39.
Modules: Soldering and Cleaning Application Note
(AN04-001).
300
Per J-STD-020 Rev. C
Peak Temp 260°C
250
Reflow Temp (°C)
Data Sheet
October 21, 2009
200
150
* Min. Time Above 235°C
15 Seconds
Heating Zone
1°C/Second
Cooling
Zone
*Time Above 217°C
60 Seconds
100
50
0
Reflow Time (Seconds)
Figure 39. Recommended linear reflow profile
using Sn/Ag/Cu solder.
MSL Rating
The Austin MegaLynxTM ATM SMT modules have a
MSL rating of 2.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount
packages is detailed in J-STD-033 Rev. A (Handling,
Packing, Shipping and Use of Moisture/Reflow
Sensitive Surface Mount Devices). Moisture barrier
bags (MBB) with desiccant are required for MSL
ratings of 2 or greater. These sealed packages
should not be broken until time of use. Once the
original package is broken, the floor life of the product
at conditions of ≤ 30°C and 60% relative humidity
varies according to the MSL rating (see J-STD-033A).
The shelf life for dry packed SMT packages will be a
minimum of 12 months from the bag seal date, when
stored at the following conditions: < 40° C, < 90%
relative humidity.
Post Solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect
both the reliability of a power module and the
testability of the finished circuit-board assembly. For
guidance on appropriate soldering, cleaning and
drying procedures, refer to Board Mounted Power
LINEAGE POWER
21
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
2.7 – 4.0Vdc input; 0.8 to 2.0Vdc Output; 30A output current
Data Sheet
October 21, 2009
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 1: Device Codes
ATM030A0X3-SR
Input
Voltage
2.7 – 4.0Vdc
Output
Voltage
0.8 – 2.0Vdc
ATM030A0X3-SRZ
2.7 – 4.0Vdc
0.8 – 2.0Vdc
30A
Negative
SMT
CC109112397
ATM030A0X3-SRH
2.7 – 4.0Vdc
0.8 – 2.0Vdc
30A
Negative
SMT
CC109112323
Product codes
Output
Current
30A
On/Off
Logic
Negative
Connector
Type
SMT
Comcodes
CC109112315
ATM030A0X3-SRHZ
2.7 – 4.0Vdc
0.8 – 2.0Vdc
30A
Negative
SMT
CC109112406
ATM030A0X3-SRPH
2.7 – 4.0Vdc
0.8 – 2.0Vdc
30A
Negative
SMT
CC109112331
ATM030A0X3-SRPHZ
2.7 – 4.0Vdc
0.8 – 2.0Vdc
30A
Negative
SMT
CC109112414
Table 2.
Device Options
Option
Device Code Suffix
Current Share
-P
2 Extra ground pins
-H
RoHS Compliant
-Z
Asia-Pacific Headquarters
Tel: +65 6593 7211
World Wide Headquarters
Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-800-526-7819
(Outside U.S.A.: +1-972-244-9428)
www.lineagepower.com
e-mail: [email protected]
Europe, Middle-East and Africa Headquarters
Tel: +49 898 780 672 80
India Headquarters
Tel: +91 80 28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
application. No rights under any patent accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.
© 2009 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.
LINEAGE POWER
22
Document No: DS06-130 ver. 1.05
PDF No: ATM030A0X3-SR_ds.pdf