GE
Data Sheet
September 25, 2015 ©2015 General Electric Company. All rights reserved.
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A 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 5A output current
High efficiency – 94% at 3.3V full load (VIN = 5.0V)
Small size and low profile:
22.9 mm x 10.2 mm x 6.66 mm
(0.9 in x 0.4 in x 0.262 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 19M hours at 25oC Full-load
Output voltage programmable from 0.75 Vdc to
3.63Vdc via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4 % (typical)
Remote On/Off
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to
85°C)
UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-
03 Certified, and VDE‡ 0805:2001-12 (EN60950-1)
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
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC) and Microprocessor
powered applications
Description
Austin MicroLynxTM SIP (single in-line package) power modules are non-isolated dc-dc converters that can deliver up to 5A of
output current with full load efficiency of 94% at 3.63V output. These modules provide precisely regulated output voltage
programmable via external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (VIN = 3.0 – 5.5V). Their open-frame
construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard features include
remote On/Off, programmable output voltage and overcurrent protection.
* 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
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September
25, 2015
©2015 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 All VIN -0.3 5.8 Vdc
Continuous
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 3.0 - 5.5 Vdc
Maximum Input Current All IIN,max 5.0 Adc
(VIN= VIN, min to VIN, max, IO=IO, max )
Input No Load Current VO,set = 0.75 Vdc IIN,No load 20 mA
(VIN = VIN, nom, Io = 0, module enabled) VO,set = 3.3Vdc IIN,No load 45 mA
Input Stand-by Current All IIN,stand-by 0.6 mA
(VIN = VIN, nom, module disabled)
Inrush Transient All I2t 0.04 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN, min to VIN,
max, IO= IOmax ; See Test configuration section)
All 35 mAp-p
Input Ripple Rejection (120Hz) All 30 dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being part of a
complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum safety
and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 6 A
(see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input
current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information.
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 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 -2.0 VO, set +2.0 % VO, set
(VIN=IN, min, IO=IO, max, TA=25°C)
Output Voltage All VO, set -3% +3.% % VO, set
(Over all operating input voltage, resistive load, and
temperature conditions until end of life)
Adjustment Range All VO 0.7525 3.63 Vdc
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max) All 0.3 % VO, set
Load (IO=IO, min to IO, max) All 0.4 % VO, set
Temperature (Tref=TA, min to TA, max) All 0.4 % VO, set
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1μF ceramic//10μFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth) All 10 15 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) All 40 50 mVpk-pk
External Capacitance
ESR ≥ 1 mΩ All CO, max 1000 μF
ESR ≥ 10 mΩ All CO, max 3000 μF
Output Current All Io 0 5 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim 220 % Io
(VO= 90% of VO, set)
Output Short-Circuit Current All IO, s/c 2 Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency
V
O,set
=
0.75Vdc
η 79.0 %
VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 85.0 %
IO=IO, max , VO= VO,set VO,set = 1.5Vdc η 87.0 %
VO,set = 1.8Vdc η 88.5 %
VO,set = 2.5Vdc η 92.0 %
VO,set = 3.3Vdc η 94.0 %
Switching Frequency All fsw 300 kHz
Dynamic Load Response
(dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk 130 mV
Load Change from Io= 50% to 100% of Io,max; 1μF
ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation)
All ts 25 µs
(dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk 130 mV
Load Change from Io= 100% to 50%of Io,max: 1μF
ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation)
All ts 25 µs
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
4
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(dIo/dt=2.5A/µs; V VIN = VIN, nom; TA=25°C) All Vpk 50 mV
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
All ts 50 µs
(dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk 50 mV
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
All ts 50 µs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=IO, max, TA=25°C) 19,000,000 Hours
Weight 2.8 (0.1) g (oz.)
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 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
Remote On/Off Signal interface
(VIN=VIN, min to VIN, max; Open collector pnp or equivalent
Compatible, Von/off signal referenced to GND
See feature description section)
Logic Low (On/Off Voltage pin open - Module ON)
Von/Off All VIL ― ― 0.4 V
Ion/Off All IIL ― ― 10 μA
Logic High (Von/Off > 2.5V – Module Off)
Von/Off All VIH ― ― VIN, max V
Ion/off All IIH ― ― 1 mA
Turn-On Delay and Rise Times
(IO=IO, max , VIN = VIN, nom, TA = 25 oC, )
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which V
IN
=V
IN, min
until Vo=10% of Vo,set)
All
Tdelay
―
3.9
―
msec
Case 2: Input power is applied for at least one second
and then the On/Off input is set to logic Low (delay from
instant at which Von/Off=0.3V until Vo=10% of Vo, set)
All
Tdelay
―
3.9
―
msec
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
All
Trise
―
4.2
8.5
msec
Output voltage overshoot – Startup ―
1
% VO, set
IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 oC
Overtemperature Protection
All Tref 150 °C
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold All 2.2 V
Turn-off Threshold All 2.0 V
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
6
Characteristic Curves
The following figures provide typical characteristics for the Austin MicroLynxTM SIP modules at 25ºC.
EFFICIENCY, η (%)
70
73
76
79
82
85
88
0 1 2 3 4 5
Vin = 5.5V
Vin = 5.0V
Vin = 3.0V
EFFICIENCY, η (%)
70
75
80
85
90
95
0 1 2 3 4 5
Vin = 5.5V
Vin = 5.0V
Vin = 3.0V
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT, I
O
(A)
Figure 1. Converter Efficiency versus Output Current (Vout
= 0.75Vdc).
Figure 4. Converter Efficiency versus Output Current (Vout
= 1.8Vdc).
EFFICIENCY, η (%)
70
75
80
85
90
95
0 1 2 3 4 5
Vin = 5.5V
Vin = 5.0V
Vin = 3.0V
EFFICIENCY, η (%)
70
75
80
85
90
95
100
0 1 2 3 4 5
Vin = 5.5V
Vin = 5.0V
Vin = 3.0V
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT, I
O
(A)
Figure 2. Converter Efficiency versus Output Current (Vout
= 1.2Vdc).
Figure 5. Converter Efficiency versus Output Current (Vout
= 2.5Vdc).
EFFICIENCY, η (%)
70
75
80
85
90
95
0 1 2 3 4 5
Vin = 5.5V
Vin = 5.0V
Vin = 3.0V
EFFICIENCY, η (%)
70
75
80
85
90
95
100
01 2 3 4 5
Vin = 5.5V
Vin = 5.0V
Vin = 4.5V
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT, I
O
(A)
Figure 3. Converter Efficiency versus Output Current (Vout
= 1.5Vdc).
Figure 6. Converter Efficiency versus Output Current (Vout
= 3.3Vdc).
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
7
Characteristic Curves (continued)
The following figures provide typical characteristics for the MicroLynxTM SIP modules at 25ºC.
INPUT CURRENT, IIN (A)
0
1
2
3
4
5
6
0.5 1.5 2.5 3.5 4.5 5.5
Io=0A
Io=5A
Io=2.5A
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (100mV/div)
INPUT VOLTAGE, VIN (V)
TIME, t (5 µs/div)
Figure 7. Input voltage vs. Input Current
(Vout = 2.5Vdc).
Figure 10. Transient Response to Dynamic Load Change
from 50% to 100% of full load (Vo = 3.3Vdc).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (100mV/div)
TIME, t (2µs/div) TIME, t (5 µs/div)
Figure 8. Typical Output Ripple and Noise
(Vin = 5V dc, Vo = 0.75 Vdc, Io=5A).
Figure 11. Transient Response to Dynamic Load Change
from 100% to 50% of full load (Vo = 3.3 Vdc).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (50mV/div)
TIME, t (2µs/div)
TIME, t (10µs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 5V dc, Vo = 3.3 Vdc, Io=5A).
Figure 12. Transient Response to Dynamic Load Change
from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150
μF Polymer Capacitors).
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin MicroLynxTM SIP modules at 25ºC.
OUTPUT CURRENT OUTPUTVOLTAGE
IO (A) (2A/div) VO (V) (50mV/div)
OUTPUT VOLTAGE, INPUT VOLTAGE Vo (V)
(1V/div) VIN (V) (2V/div)
TIME, t (10µs/div)
TIME, t (2 ms/div)
Figure 13. Transient Response to Dynamic Load Change
from 100% of 50% full load (Vo = 3.3 Vdc, Cext = 2x150 μF
Polymer Capacitors).
Figure 16. Typical Start-Up with application of Vin with (Vin
= 5.0Vdc, Vo = 3.3Vdc, Io = 5A).
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (52V/div)
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Figure 14. Typical Start-Up Using Remote On/Off
(Vin = 5Vdc, Vo = 3.3Vdc, Io = 5.0A).
Figure 17 Typical Start-Up using Remote On/off with
Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0 Vdc).
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
OUTPUT CURRENT,
IO (A) (5A/div)
TIME, t (2 ms/div)
TIME, t (20ms/div)
F
igure 15. Typical Start-Up Using Remote On/Off with Low-
ESR external capacitors (7x150uF Polymer) (Vin = 5Vdc, Vo
= 3.3Vdc, Io = 5.0A, Co = 1050
µ
F).
Figure 18. Output short circuit Current (Vin = 5Vdc, Vo =
0.75Vdc).
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
9
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin MicroLynxTM SIP modules.
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
20 30 40 50 60 70 80 90
0.5m/s (100 LFM)
NC
1.0m/s (200 LFM)
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
20 30 40 50 60 70 80 90
NC
1.0m/s (200 LFM)
0.5m/s (100 LFM)
AMBIENT TEMPERATURE, T
A
OC
AMBIENT TEMPERATURE, T
A
OC
Figure 19. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 5.0Vdc, Vo=3.3Vdc).
Figure 22. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 3.3Vdc, Vo=0.75 Vdc).
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
20 30 40 50 60 70 80 90
NC
1.0m/s (200 LFM)
0.5m/s (100 LFM)
AMBIENT TEMPERATURE, T
A
OC
Figure 20. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 5.0Vdc, Vo=0.75 Vdc).
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
20 30 40 50 60 70 80 90
NC
1.0m/s (200 LFM)
0.5m/s (100 LFM)
AMBIENT TEMPERATURE, TA OC
Figure 21. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 3.3Vdc, Vo=2.5 Vdc).
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
10
Test Configurations
TO OSCILLOSCOPE
CURRENT PROBE
LTEST
1μH
BATTERY
C
S
1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
2x100μF
Tantalum
V
IN
(+)
COM
NOTE: Measure input ref l ect ed ripple current with a sim ulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
C
IN
Figure 23. 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 24. Output Ripple and Noise Test Setup.
V
O
COM
V
IN
(+)
COM
R
LOAD
R
contact
R
distribution
R
contact
R
distribution
R
contact
R
contact
R
distribution
R
distribution
V
IN
V
O
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvi n c onnect i ons are requ ired at th e m odu l e t ermi n als
to avoi d m eas urem en t er r ors due to s oc k et c ont act
resistance.
Figure 25. Output Voltage and Efficiency Test Setup.
η
=
V
O
.
I
O
V
IN
.
I
IN
x
100
%
Efficiency
Design Considerations
Input Filtering
The Austin MicroLynxTM SIP module should be connected to a
low-impedance source. A highly inductive source can affect
the stability of the module. An input capacitance 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 polymer and ceramic
capacitors are recommended at the input of the module.
Figure 26 shows the input ripple voltage (mVp-p) for various
outputs with 1x150 µF polymer capacitors (Panasonic p/n:
EEFUE0J151R, Sanyo p/n: 6TPE150M) in parallel with 1 x 47 µF
ceramic capacitor (Panasonic p/n: ECJ-5YB0J476M, Taiyo-
Yuden p/n: CEJMK432BJ476MMT) at full load. Figure 27 shows
the input ripple with 2x150 µF polymer capacitors in parallel
with 2 x 47 µF ceramic capacitor at full load.
Input Ripple Voltage (mVp-p)
0
20
40
60
80
100
120
0 1 2 3 4
Vin = 3.3V
Vin = 5.0V
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various output with 1x150
µF polymer and 1x47 µF ceramic capacitors at the input (full
load)
Input Ripple Voltage (mVp-p)
0
20
40
60
80
100
120
0 1 2 3 4
Vin = 3.3V
Vin = 5.0V
Output Voltage (Vdc)
Figure 27. Input ripple voltage for various output with 2x150
µF polymer and 2x47 µF ceramic capacitors at the input (full
load)
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
11
Design Considerations (continued)
Output Filtering
The Austin MicroLynxTM SIP module is designed for low output
ripple voltage and will meet the maximum output ripple
specification with 1 µF ceramic and 10 µF polymer capacitors
at the output of the module. However, additional output
filtering may be required by the system designer for a number
of reasons. First, there may be a need to further reduce the
output ripple and noise of the module. Second, the dynamic
response characteristics may need to be customized to a
particular load step change.
To reduce the output ripple and improve the dynamic response
to a step load change, additional capacitance at the output
can be used. Low ESR polymer and ceramic capacitors are
recommended to improve the dynamic response of the
module. For stable operation of the module, limit the
capacitance to less than the maximum output capacitance as
specified in the electrical specification table.
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
60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12
(EN60950-1) 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.
The input to these units is to be provided with a fast-acting
fuse with a maximum rating of 6A in the positive input lead.
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
12
Feature Description
Remote On/Off
The Austin MicroLynxTM SIP power modules feature an On/Off
pin for remote On/Off operation of the module. If not using the
remote On/Off pin, leave the pin open (module will be On). The
On/Off pin signal (Von/Off) is referenced to ground. To switch
module on and off using remote On/Off, connect an open
collector pnp transistor between the On/Off pin and the VIN pin
(See Figure 28).
When the transistor Q1 is in the OFF state, the power module is
ON (Logic Low on the On/Off pin of the module) and the
maximum Von/off of the module is 0.4 V. The maximum
allowable leakage current of the transistor when Von/off = 0.4V
and VIN = VIN,max is 10μA. During a logic-high when the
transistor is in the active state, the power module is OFF.
During this state VOn/Off =10 - 14V and the maximum IOn/Off
= 1mA.
V
IN
(+)
GND
Enable
20k
20k
On/Off
Pin
Css
I
On/Off
Lynx-series Module
Figure 28. Remote On/Off Implementation
Remote On/Off can also be implemented using open-collector
logic devices with an external pull-up resistor. Figure 28a
shows the circuit configuration using this approach. Pull-up
resistor, Rpull-up, for the configuration should be 5k (+/-5%) for
proper operation of the module over the entire temperature
range.
Figure 28a. Remote On/Off Implementation using logic-level
devices and an external pull-up resistor
Overcurrent 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 typical average output current during
hiccup is 2A.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit,
module operation is disabled. The module will begin to operate
at an input voltage above the undervoltage lockout turn-on
threshold.
Overtemperature Protection
To provide over temperature protection in a fault condition, the
unit relies upon the thermal protection feature of the controller
IC. The unit will shutdown if the thermal reference point Tref2,
(see Figure 31) exceeds 150oC (typical), but the thermal
shutdown is not intended as a guarantee that the unit will
survive temperatures beyond its rating. The module will
automatically restarts after it cools down.
Q1
R1
R2
Q2 CSS
GND
PW M Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
pull-up
R
ON/OFF
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
13
Feature Descriptions (continued)
Output Voltage Programming
The output voltage of the Austin MicroLynxTM can be
programmed to any voltage from 0.75Vdc to 3.63Vdc by
connecting a resistor (shown as Rtrim in Figure 29) between
Trim and GND pins of the module. Without an external resistor
between Trim and GND pins, the output of the module will be
0.7525Vdc. To calculate the value of the trim resistor, Rtrim for
a desired output voltage, use the following equation:
Ω
−
−
=5110
7525.0
21070
Vo
Rtrim
Rtrim is the external resistor in Ω
Vo is the desired output voltage
For example, to program the output voltage of the Austin
MicroLynxTM module to 1.8V, Rtrim is calculated as follows:
−
−
=5110
7525
.
0
8
.
1
21070
Rtrim
Ω= kRtrim 024.9
V
O
(+)
TRIM
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
Figure 29. Circuit configuration to program output voltage
using an external resistor
Austin MicroLynxTM can also be programmed by applying a
voltage between TRIM and GND pins (Figure 30). The following
equation can be used to determine the value of Vtrim needed
to obtain a desired output voltage Vo:
{ }( )
7525.01698.07.0 −×−= VoVtrim
For example, to program the output voltage of a MicroLynxTM
module to 3.3 Vdc, Vtrim is calculated as follows:
{ }
)7525.0
3.31698.0
7.0( −×−=Vtrim
VVtrim 2670.0=
V
O
(+)
TRIM
GND
V
t
rim
LOAD
V
IN
(+)
ON/OFF
+
-
Figure 30. Circuit Configuration for programming Output
voltage using external voltage source
Table 1 provides Rtrim values for most common output
voltages. Table 2 provides values of external voltage
source, Vtrim for various output voltage.
Table 1
V
O, set
(V)
Rtrim (KΩ)
0.7525
Open
1.2
41.973
1.5
23.077
1.8
15.004
2.5
6.947
3.3
3.160
Table 2
V
O, set
(V)
Vtrim (V)
0.7525
Open
1.2
0.6240
1.5
0.5731
1.8
0.5221
2.5
0.4033
3.3
0.2670
Using 1% tolerance trim resistor, set point tolerance of ±2% is
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.
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
14
Feature Descriptions (continued)
The amount of power delivered by the module is defined as
the voltage at the output terminals multiplied by the output
current. When using the trim feature, the output voltage of
the module can be increased, which at the same output
current would increase the power output of the module.
Care should be taken to ensure that the maximum output
power of the module remains at or below the maximum
rated power (Pmax = Vo,set x Io,max).
Voltage Margining
Output voltage margining can be implemented in the Austin
MicroLynxTM modules by connecting a resistor, Rmargin-up,
from Trim pin to ground pin for margining-up the output
voltage and by connecting a resistor, Rmargin-down, from Trim
pin to Output pin. Figure 31 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
Figure 31. Circuit Configuration for margining Output
voltage.
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
15
Thermal Considerations
Power modules operate in a variety of thermal environments;
however, sufficient cooling should 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 32. The derating data applies to airflow in either
direction of the module’s long axis.
Figure 32. Tref Temperature measurement location.
The thermal reference point, Tref 1 used in the specifications of
thermal derating curves is shown in Figure 32. For reliable
operation this temperature 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.
Figure 33. Thermal Test Set-up.
Heat Transfer via Convection
Increased airflow over the module enhances the heat transfer
via convection. Thermal derating curves showing the
maximum output current that can be delivered by various
module versus local ambient temperature (TA) for natural
convection and up to 1m/s (200 ft./min) are shown in the
Characteristics Curves section.
Layout Considerations
Copper paths must not be routed beneath the power module.
For additional layout guide-lines, refer to FLTR100V10
application note.
Air
flow
x
Power Module
Wind Tunnel
PWBs
7.24_
(0.285)
76.2_
(3.0)
Probe Location
for measuring
airflo w and
ambient
temperature
25.4_
(1.0)
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
16
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.
Through-Hole Lead-Free Soldering
Information
The RoHS-compliant through-hole products use the SAC
(Sn/Ag/Cu) Pb-free solder and RoHS-compliant components.
They are designed to be processed through single or dual wave
soldering machines. The pins have an RoHS-compliant finish
that is compatible with both Pb and Pb-free wave soldering
processes. A maximum preheat rate of 3°C/s is suggested. The
wave preheat process should be such that the temperature of
the power module board is kept below 210°C. For Pb solder,
the recommended pot temperature is 260°C, while the Pb-free
solder pot is 270°C max. Not all RoHS-compliant through-hole
products can be processed with paste-through-hole Pb or Pb-
free reflow process. If additional information is needed, please
consult with your GE technical representative for more details.
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
17
Mechanical Outline
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.)
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current
September 25, 2015
©2015 General Electric Company. All rights reserved.
Page
18
Recommended Pad Layout
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.)
GE
Data Sheet
Austin MicroLynxTM: SIP Non-Isolated DC-DC Power Modules
3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A 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.
September 25, 2015 ©2015 General Electric Company. All International rights reserved. Version 1.35
Ordering Information
Please contact your GE Sales Representative for pricing, availability and optional features.
Table 3. Device Codes
Device Code Input
Voltage Range
Output
Voltage
Output
Current
Efficiency
3.3V@ 5A
On/Off
Logic
Connector
Type Comcodes
AXH005A0XZ 3.0 – 5.5Vdc 0.75 – 3.63Vdc 5 A 94.0% Negative SIP CC109104881
AXH005A0X 3.0 – 5.5Vdc 0.75 – 3.63Vdc 5 A 94.0% Negative SIP 108979675
-Z refers to RoHS compliant Versions
