GE
Data Sheet
January 20, 2016 ©2016 General Electric Company. All rights reserved.
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
Features
Compliant to RoHS EU Directive 2011/65/EU (-Z versions)
Compliant to RoHS EU Directive 2011/65/EU under
exemption 7b (Lead solder exemption). Exemption 7b will
expire after June 1, 2016 at which time this product will
no longer be RoHS compliant (non-Z versions)
Delivers up to 30A of output current
High efficiency – 92% @ 1.8V full load (VIN=3.3Vdc)
Input voltage range from 2.7V to 4.0Vdc
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.)
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
Certified, and VDE‡ 0805 (EN60950-1 3rd edition) Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
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
RoHS Compliant
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
2
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
Input Voltage
Continuous 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
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
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 I2 t 1 A2 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
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point All VO, set -1.5 +1.5 % 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)
All VO, set –3.0 +3.0 % VO, set
Adjustment Range
Selected by an external resistor All 0.8 2.0 Vdc
Output Regulation
Line (VIN=VIN, min to VIN, max) All 0.1 % VO, set
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
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) Vo ≤ 2.0V 50 mVpk-pk
External Capacitance 1
ESR ≥ 1 mΩ All CO, max 0 2,000 μF
ESR ≥ 10 mΩ All CO, max 0 10,000 μF
Output Current Vo ≤ 3.63V Io 0 30 Adc
Output Current Limit Inception (Hiccup Mode) All IO, lim 104 140 160 % Iomax
Output Short-Circuit Current All IO, s/c 3.5 Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO,set = 0.8dc η 83.5 %
VIN=VIN, nom, TA=25°C
V
O,set
=
1.25Vdc
η 87.9 %
IO=IO, max , VO= VO,set VO,set = 1.8Vdc η 91.6 %
Switching Frequency, Fixed All fsw 270 kHz
Dynamic Load Response
(dIO/dt=5A/µs; VIN=VIN, nom; TA=25°C)
Load Change from Io= 50% to 100% of I
O
,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 I
O
= 100% to 50%of I
O
,
max
: No external
output capacitors
Peak Deviation All Vpk 380 mV
Settling Time (VO<10% peak deviation) All ts 50 µs
1 Note that maximum external capacitance may be lower when sequencing is employed. Please check with your GE Technical
representative.
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
4
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(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 I
O,max
: 2x150 μF
polymer capacitor
Peak Deviation All Vpk 250 mV
Settling Time (VO<10% peak deviation) All ts 60 µs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (VO= 1.2Vdc, IO= 0.8IO, max, TA=40°C)
Per Telecordia Method 3,443,380 Hours
Weight 6.2 (0.22) g (oz.)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
5
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
Logic Low (Module ON)
Input Low Current All IIL 200 µA
Input Low Voltage All VIL -0.3 1.2 V
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)
All
Tdelay
3.8
4.7
6
msec
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)
All
Tdelay
3.8
4.7
6
msec
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set)
All
Trise
2.5
3
3.8
msec
Output voltage overshoot 3.0 % VO, set
IO = IO, max; VIN, min – VIN, max, TA = 25 oC
Remote Sense Range All 0.5 V
Over temperature Protection All Tref 125 °C
(See Thermal Consideration section)
Sequencing Slew rate capability All dVSEQ/dt — 2 V/msec
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Sequencing Delay time (Delay from VIN, min
to application of voltage on SEQ pin) All
Ts
EQ-
delay
10 msec
Tracking Accuracy Power-up (2V/ms) All VSEQ –Vo 100 200 mV
Power-down (1V/ms) VSEQ –Vo 200 400 mV
(VIN, min to VIN, max; IO, min - IO, max VSEQ < Vo)
Input Undervoltage Lockout
Turn-on Threshold All 2.2 Vdc
Turn-off Threshold All 1.7 Vdc
Forced Load Share Accuracy -P 10 % Io
Number of units in Parallel -P 5
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
6
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR & -SRH (0.8V, 30A) at 25oC.
EFFICIENCY, η (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, I
O
(A)
AMBIENT TEMPERATURE, T
A
O
C
Figure 1. Converter Efficiency versus Output Current. Figure 4. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, Io (A)
TIME, t (1
µ
s/div)
AMBIENT TEMPERATURE, T
A
O
C
Figure 2. Typical output ripple and noise (VIN = VIN,NOM, Io =
Io,max).
Figure 5. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5Adiv) VO (V) (200mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (1V/div) VO (V) (1V/div)
TIME, t (50µs /div)
TIME, t (5ms/div)
Figure 3. Transient Response to Dynamic Load Change from
0% to 50% to 0% of full load.
Figure 6. Typical Start-up Using Input Voltage (VIN = VIN,NOM,
Io = Io,max).
65
70
75
80
85
90
95
0 5 10 15 20 25 30
Vi n = 3. 0V
Vi n = 3. 3V
Vi n = 3. 9V
0
5
10
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m/s
100 LFM
1m/s
200 LFM
1.5m/s
300 LFM
2.0m/s
400 LFM
2.5m/s
500 LFM
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m /s (100LFM)
1m/ s (200LFM)
1.5m /s (300LFM)
2m/ s (400LFM )
2.5m /s (500LFM)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
7
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR and -SRH (1.25V, 30A) at 25oC.
EFFICIENCY, η (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, I
O
(A)
AMBIENT TEMPERATURE, T
A
OC
Figure 7. Converter Efficiency versus Output Current.
Figure 10. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, Io (A)
TIME, t (1µs/div)
AMBIENT TEMPERATURE, T
A
O
C
Figure 8. Typical output ripple and noise (V
IN
= V
IN,NOM
, I
o
=
Io,max).
Figure 11. Derating Output Current versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5Adiv) VO (V) (200mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (1V/div) VO (V) (1V/div)
TIME, t (50µs /div)
TIME, t (5ms/div)
Figure 9. Transient Response to Dynamic Load Change from
0% to 50% to 0% of full load.
Figure 12. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
65
70
75
80
85
90
95
0 5 10 15 20 25 30
V in = 3. 0V
V in = 3. 3V
V in = 3. 9V
0
5
10
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m/s
100 LFM
1m/s
200 LFM
1.5m/s
300 LFM
2.0m/s
400 LFM
2.5m/s
500 LFM
20
25
30
35
30 40 50 60 70 80
NC
0.5m /s (100LFM)
1m/ s (200LFM )
1.5m /s (300LFM)
2m/ s (400LFM )
2.5m /s (500LFM)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
8
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR and –SRH (1.8V, 30A) at 25oC.
EFFICIENCY, η (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, I
O
(A)
AMBIENT TEMPERATURE, T
A
O
C
Figure 13. Converter Efficiency versus Output Current.
Figure 16. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, Io (A)
TIME, t (1µs/div) AMBIENT TEMPERATURE, TA OC
Figure 14. Typical output ripple and noise (V
IN
= V
IN,NOM
, I
o
=
Io,max).
Figure 17. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5A/div) VO (V) (200mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (1V/div) VO (V) (1V/div)
TIME, t (50µs /div) TIME, t (5ms/div)
Figure 15. Transient Response to Dynamic Load Change
from 0% to 50% to 0% of full load.
Figure 18. Typical Start-up Using Input Voltage (VIN = VIN,NOM,
Io = Io,max).
70
75
80
85
90
95
100
0 5 10 15 20 25 30
Vi n = 3. 0V
Vi n = 3. 3V
Vi n = 3. 9V
0
5
10
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m/s
100 LFM
1m/s
200 LFM
1.5m/s
300 LFM
2.0m/s
400 LFM
2.5m/s
500 LFM
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m /s (100LFM)
1m/ s (200LFM )
1.5m /s (300LFM)
2m/ s (400LFM )
2.5m /s (500LFM)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
9
Characteristic Curves
The following figures provide typical characteristics for the ATM030A0X3-SR and -SRH (2.0V, 30A) at 25oC.
EFFICIENCY, η (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 19. Converter Efficiency versus Output Current. Figure 22. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SR).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, Io (A)
TIME, t (1µs/div)
AMBIENT TEMPERATURE, T
A
O
C
Figure 20. Typical output ripple and noise (VIN = VIN,NOM, Io =
Io,max).
Figure 23. Output Current Derating versus Ambient
Temperature and Airflow (ATM030A0X3-SRH).
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5A/div) VO (V) (200mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (1V/div) VO (V) (1V/div)
TIME, t (50
µ
s /div)
TIME, t (5ms/div)
Figure 21. Transient Response to Dynamic Load Change
from 0% to 50% to 0% of full load.
Figure 24. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
70
75
80
85
90
95
100
0 5 10 15 20 25 30
V in = 3. 0V
V in = 3. 3V
V in = 3. 9V
0
5
10
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m/s
100 LFM
1m/s
200 LFM
1.5m/s
300 LFM
2.0m/s
400 LFM
2.5m/s
500 LFM
15
20
25
30
35
30 40 50 60 70 80
NC
0.5m /s (100LFM)
1m/ s (200LFM )
1.5m /s (300LFM)
2m/ s (400LFM )
2.5m /s (500LFM)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
10
Test Configurations
TO OSCILLOSCOPE
CURRENT PROBE
L
TEST
1μH
BATTERY
C
S
220μF
E.S.R.<0.1Ω
@ 20°C 100kHz
Min
150μF
V
IN
(+)
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (L
TEST
) of 1μH. Capacitor C
S
of fsets
possible battery impedance. Measure current as shown
above.
C
IN
Figure 25. Input Reflected Ripple Current Test Setup.
NOTE: All voltage measurem ents 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.
V
O
(+)
COM
1uF
.
RESISTIVE
LOAD
SCOPE
COPPER STRIP
GROUND PLANE
10uF
Figure 26. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontact
Rdistribution
Rcontact
Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
VIN
VO
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvi n c onnec ti ons are r equ ired at the m odu l e t ermi n als
to avoi d m eas urem en t errors du e t o s oc k et c ontact
resistance.
Figure 27. Output Voltage and Efficiency Test Setup.
η
=
V
O
.
I
O
V
IN
.
I
IN
x
100
%
Efficiency
Design Considerations
The ATM030 module should be connected to a low-
impedance 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.
Input Ripple Voltage (mVp-p)
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.
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.
40
50
60
70
80
90
100
0.5 11.5 2
1 x 47uF
2 x 47uF
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
11
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.
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.
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.
V
O
COM
V
IN
(+)
COM
R
LOAD
R
contact
R
distribution
R
contact
R
distribution
R
contact
R
contact
R
distribution
R
distribution
Sense
Figure 30. Effective Circuit Configuration for Remote
Sense operation.
Over Current 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
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.
Output Voltage Programming
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:
Ω
−
−
=100
80.0
1200
Vo
R
trim
Rtrim is the external resistor in Ω
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.gecriticalpower.com
under the Design Tools section, helps determine the
required external trim resistor needed for a specific output
voltage.
Q1
GND
PW M Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
R1
ON/OFF
100K
Therm al SD
1K
10K
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
12
V
O
(+)
TRIM
GND
LOAD
V
IN
(+)
ON/OFF
Rtrim
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.gecriticalpower.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 GE technical representative for additional details.
Voltage Sequencing
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.
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.
When using the EZ-SEQUENCETM 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 using the EZ-SEQUENCETM feature, modules goes
through an internal set-up time of 10msec, and will be in
synchronous rectification mode when voltage 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 EZ-
SEQUENCETM feature must be disabled. For additional
guidelines on using EZ-SEQUENCETM 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.
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
13
• 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) , i.e.
less than 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.
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
14
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 33. Thermal Test Up
Figure 34. Airflow direction for thermal testing.
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 Board-Mounted
Power Modules” for a detailed discussion of thermal aspects
including maximum device temperatures.
Air
flow
x
Power Module
Wind Tunnel
PWBs
12.7_
(0.50)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
15
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.
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
16
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.)
Note: For the ATM030A0X3-SRH module, the SHARE pin is not present since these modules are not capable of being
paralleled.
PIN
FUNCTION
PIN
FUNCTION
1
On/Off
6
Trim
2
V
IN
7
Sense
3
SEQ
8
GND
4
GND
9
SHARE
5
V
OUT
10
GND
Pin 8
Pin 10
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
17
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.
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
18
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.)
Note: For the ATM030A0X3-SR module, the SHARE pin is not used since these modules are not capable of being
paralleled.
PIN
FUNCTION
PIN
FUNCTION
1
On/Off
6
Trim
2
V
IN
7
Sense
3
SEQ
8
No Pin
4
GND
9
Share
5
V
OUT
10
No Pin
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
19
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: 330.2 (13.0)
Inside diameter: 177.8 (7.0)
Tape Width: 44.0 (1.73)
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
20
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 temperatures of up to 300oC. The label
also carries product information such as product code,
serial number and location of manufacture.
Figure 36. Pick and Place Location.
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.
Tin Lead Soldering
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.
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.
REFLOW TEMP (°C)
REFLOW TIME (S)
Figure 37. Reflow Profile for Tin/Lead (Sn/Pb) process.
MAX TEMP SOLDER (°C)
Figure 38. Time Limit Curve Above 205oC Reflow for Tin
Lead (Sn/Pb) process.
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
January 20, 2016
©
2016 General Electric Company. All rights reserved. Page
21
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.
MSL Rating
The Austin MegaLynxTM ATM SMT modules have a MSL rating
of 2a.
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 Modules: Soldering and Cleaning
Application Note (AN04-001).
Figure 39. Recommended linear reflow profile using
Sn/Ag/Cu solder.
Per J-STD-020 Rev. C
0
50
100
150
200
250
300
Reflow Time (Seconds)
Ref low Temp (°C )
Heating Zone
1°C/Second
Peak Temp 260°C
* Min. Time Above 235°C
15 Seconds
*Time Above 217°C
60 Seconds
Cooling
Zone
GE
Data Sheet
30A Austin MegaLynxTM: Non-Isolated DC-DC Power Modules
2.7Vdc – 4.0Vdc input; 0.8Vdc to 2.0Vdc output; 30A Output Current
Contact Us
For more information, call us at
USA/Canada:
+1 877 546 3243, or +1 972 244 9288
Asia-Pacific:
+86.021.54279977*808
Europe, Middle-East and Africa:
+49.89.878067-280
www.gecriticalpower.com
GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and 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.
January 20, 2016 ©2016 General Electric Company. All International rights reserved. Version 1.11
Ordering Information
Please contact your GE Sales Representative for pricing, availability and optional features.
Table 1: Device Codes
Product codes
Input
Voltage
Output
Voltage
Output
Current
On/Off
Logic
Connector
Type
Comcodes
ATM030A0X3-SR 2.7 – 4.0Vdc 0.8 – 2.0Vdc 30A Negative SMT CC109112315
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
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
