Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A Output Current
* 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: DS04-023 ver. 1.25
PDF name: lynx_II_sip_12v_ds.pdf
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
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Flexible output voltage sequencing EZ-
SEQUENCETM
Delivers up to 10A output current
High efficiency – 93% at 3.3V full load (VIN = 12.0V)
Small size and low profile:
50.8 mm x 12.7 mm x 8.1 mm
(2.00 in x 0.5 in x 0.32 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 15M hours at 25oC Full-load
Constant switching frequency (300 kHz)
Output voltage programmable from 0.75 Vdc to
5.5Vdc via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4 % (typical)
Remote On/Off
Remote sense
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
Description
Austin LynxTM II 12V SIP (singe in-line package) power modules are non-isolated dc-dc converters that can deliver
up to 10A of output current with full load efficiency of 93% at 3.3V output. These modules provide a precisely
regulated output voltage programmable via an external resistor from 0.75Vdc to 5.0Vdc over a wide range of input
voltage (VIN = 8.3 – 14Vdc). The Austin LynxTM II 12V series has a sequencing feature, EZ-SEQUENCETM that
enable designers to implement various types of output voltage sequencing when powering multiple voltages on a
board.
RoHS Compliant
EZ-SEQUENCETM
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 15 Vdc
Continuous
Sequencing voltage All Vseq -0.3 VIN,max 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 Vo,set ≤ 3.63 VIN 8.3 12.0 14.0 Vdc
Vo,set > 3.63 VIN 8.3 12.0 13.2 Vdc
Maximum Input Current All IIN,max 70 Adc
(VIN=2.4V to 5.5V, IO=IO, max )
Input No Load Current Vo = 0.75Vdc IIN,No load 40 mA
(VIN = 12.0Vdc, IO = 0, module enabled) Vo = 5.0Vdc IIN,No load 100 mA
Input Stand-by Current All IIN,stand-by 2.0 mA
(VIN = 12.0Vdc, module disabled)
Inrush Transient All I2t 0.4 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN, min to
VIN, max, IO= IOmax ; See Test Configurations)
All 20 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 15A,
time-delay fuse (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.
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 -2.5% ⎯ +3.5% % VO, set
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All VO 0.7525 5.5 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, min to VIN, max and IO=IO, min to IO, max
Cout = 1μF ceramic//10μF tantalum capacitors)
RMS (5Hz to 20MHz bandwidth) VO ≤ 3.63Vdc ⎯ 12 30 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) VO ≤ 3.63Vdc ⎯ 30 75 mVpk-pk
RMS (5Hz to 20MHz bandwidth) VO = 5.0Vdc ⎯ 25 40 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) VO = 5.0Vdc ⎯ 70 100 mVpk-pk
External Capacitance
ESR ≥ 1 mΩ All CO, max ⎯ ⎯ 1000 μF
ESR ≥ 10 mΩ All CO, max ⎯ ⎯ 5000 μF
Output Current All Io 0 10 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 200 ⎯ % Io
(VO= 90% of VO, set)
Output Short-Circuit Current All IO, s/c ⎯ 3.0 ⎯ Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO, set = 0.75Vdc η 81.0 %
VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 87.5 %
IO=IO, max , VO= VO,set V
O,set = 1.5Vdc η 89.0 %
V
O,set = 1.8Vdc η 90.0 %
V
O,set = 2.5Vdc η 92.0 %
V
O,set = 3.3Vdc η 93.0 %
V
O,set = 5.0Vdc η 95.0 %
Switching Frequency All fsw ⎯ 300 ⎯ kHz
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 250 ⎯ 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 ⎯ 50 ⎯ μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 250 ⎯ 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 ⎯ 50 ⎯ μs
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 ⎯ 100 ⎯ 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 ⎯ 25 ⎯ μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 100 ⎯ 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 ⎯ 25 ⎯ μs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=IO, max, TA=25°C)
Telecordia SR-332 Issue 1: Method 1 Case 3 15,618,000 Hours
Weight ⎯ 5.6 (0.2) ⎯ g (oz.)
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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
Device code with Suffix “4” – Positive logic
(On/Off is open collector/drain logic input;
Signal referenced to GND - See feature description
section)
Input High Voltage (Module ON) All VIH ― ― V
IN, max V
Input High Current All IIH ― ― 10 μA
Input Low Voltage (Module OFF) All VIL -0.2 ― 0.3 V
Input Low Current All IIL ― 0.2 1 mA
Device Code with no suffix – Negative Logic
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Input High Voltage (Module OFF) All VIH 2.5 ― V
IN,max Vdc
Input High Current All IIH 0.2 1 mA
Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 Vdc
Input low Current All IIL ― 10 μA
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 VIN =VIN, min until Vo=10% of Vo,set)
All Tdelay ― 3 ― 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 ― msec
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
All Trise ― 4 6 msec
Sequencing Delay time
Delay from VIN, min to application of voltage on SEQ pin All TsEQ-delay 10 msec
Tracking Accuracy (Power-Up: 2V/ms) All |VSEQ –Vo
|
100 200 mV
(Power-Down: 1V/ms) All |VSEQ –Vo
|
200 400 mV
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Output voltage overshoot – Startup ― 1 % VO, set
IO= IO, max; VIN = 8.3 to 14Vdc, TA = 25 oC
Remote Sense Range ― ― 0.5 V
Overtemperature Protection All Tref ⎯ 125 ⎯ °C
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold All 7.9 V
Turn-off Threshold All 7.8 V
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 6
Characteristic Curves
The following figures provide typical characteristics for the Austin LynxTM II SIP modules at 25ºC.
70
72
74
76
78
80
82
84
86
88
90
02 46 810
Vin=14V
Vin=10V
Vin=12V
74
76
78
80
82
84
86
88
90
92
94
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, (η)
OUTPUT CURRENT, IO (A)
EFFICIENCY, (η)
OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).
Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
74
76
78
80
82
84
86
88
90
92
02 46 810
Vin=14V
Vin=10V
Vin=12V
78
80
82
84
86
88
90
92
94
96
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, (η)
OUTPUT CURRENT
,
I
O
(
A
)
EFFICIENCY, (η)
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).
76
78
80
82
84
86
88
90
92
0246810
Vin=14V
Vin=10V
Vin=12V
78
80
82
84
86
88
90
92
94
96
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, (η)
OUTPUT CURRENT, IO (A)
EFFICIENCY, (η)
OUTPUT CURRENT, IO (A)
Figure3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM II SIP modules at 25ºC.
0
1
2
3
4
5
6
7 8 91011121314
Io = 10A
Io=5A
Io=0A
INPUT CURRENT, IIN (A)
INPUT VOLTAGE, VIN (V)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (200mV/div)
TIME, t (10μs/div)
Figure 7. Input voltage vs. Input Current (Vo =
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)
TIME, t (2μs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (200mV/div)
TIME, t (10μs/div)
Figure 8. Typical Output Ripple and Noise
(Vin = 12.0V dc, Vo = 2.5 Vdc, Io=10A).
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)
TIME, t (2μs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (100mV/div)
TIME, t (20μs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 12.0V dc, Vo = 3.3 Vdc, Io=10A).
Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 μF Polymer Capacitors).
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM II SIP modules at 25ºC.
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (100mV/div)
TIME, t (10μs/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V)(2V/div) VIN (V) (5V/div)
TIME, t (2ms/div)
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 3.3 Vdc,
Cext = 2x150
μ
F Pol
y
mer Ca
p
acitors
)
.
Figure 16. Typical Start-Up with application of Vin
with low-ESR polymer capacitors at the output
(
7x150
μ
F
)
(
Vin = 12Vdc
,
Vo = 5.0Vdc
,
Io = 10A
)
OUTPUT VOLTAGE On/Off VOLTAGE
VO (V)(1V/div) VOn/off (V) (5V/div)
TIME, t (1ms/div)
OUTPUT VOLTAGE
VOV) (0.5V/div)
TIME, t (2ms/div)
Figure 14. Typical Start-Up Using Remote On/Off
(Vin = 12Vdc, Vo = 5.0Vdc, Io = 10A).
Figure 17. Typical Start-Up with Prebias (Vin =
12Vdc, Vo = 2.5Vdc, Io = 1A, Vbias =1.2Vdc).
OUTPUT VOLTAGE On/Off VOLTAGE
VO (V)(2V/div) VOn/off (V) (5V/div)
TIME, t (1ms/div)
OUTPUT CURRENT,
IO (A) (10A/div)
TIME, t (10ms/div)
Figure 15. Typical Start-Up Using Remote On/Off with
external capacitors (Vin = 12.0Vdc, Vo = 5.0Vdc, Io =
10A, Co = 1050μF).
Figure 18. Output short circuit Current
(Vin = 5.0Vdc, Vo = 0.75Vdc).
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 9
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin LynxTM II SIP modules.
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
10 0 L F M
200 LFM
NC
300 LFM
400 LFM
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, T
A
O
C
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, T
A
O
C
Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 12.0,
Vo=0.75Vdc).
Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 12.0dc,
Vo=5.0 Vdc).
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, T
A
O
C
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 12.0Vdc,
Vo=1.8 Vdc).
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, TA OC
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 12.0Vdc,
Vo=3.3 Vdc).
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 10
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
1μH
BATTERY
CS 1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
2x100μF
Tantalum
VIN(+)
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.
CIN
Figure 23. Input Reflected Ripple Current Test
Setup.
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.
V
O
(+)
COM
1uF .
RESISTIVE
LOAD
SCOPE
COPPER STRIP
GROUND PLANE
10uF
Figure 24. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontac t Rdistribution
Rcontac t 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
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 25. Output Voltage and Efficiency Test Setup.
η =
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
Austin LynxTM II 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.
In a typical application, 4x47 µF low-ESR tantalum
capacitors (AVX part #: TPSE476M025R0100, 47µF
25V 100 mΩ ESR tantalum capacitor) will be sufficient
to provide adequate ripple voltage at the input of the
module. To minimize ripple voltage at the input, low
ESR ceramic capacitors are recommended at the input
of the module. Figure 26 shows input ripple voltage
(mVp-p) for various outputs with 4x47 µF tantalum
capacitors and with 4x22 µF ceramic capacitor (TDK
part #: C4532X5R1C226M) at full load.
Input Ripple Voltage (mVp-p)
0
50
10 0
15 0
200
250
300
0 12 3456
Tantalum
Ceramic
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various output
with 4x47 µF tantalum capacitors and with 4x22 µF
ceramic capacitors at the input (full load).
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 11
Design Considerations (continued)
Output Filtering
The Austin LynxTM II SIP module is designed for low
output ripple voltage and will meet the maximum output
ripple specification with 1 µF ceramic and 10 µF
tantalum 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 15A in the positive
input lead.
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 12
Feature Description
Remote On/Off
The Austin LynxTM II SMT power modules feature an
On/Off pin for remote On/Off operation. Two On/Off
logic options are available in the Austin LynxTM II series
modules. Positive Logic On/Off signal, device code
suffix “4”, turns the module ON during a logic High on
the On/Off pin and turns the module OFF during a logic
Low. Negative logic On/Off signal, no device code
suffix, turns the module OFF during logic High on the
On/Off pin and turns the module ON during logic Low.
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 27. The On/Off
pin is an open collector/drain logic input signal (Von/Off)
that is referenced to ground. During a logic-high (On/Off
pin is pulled high internal to the module) when the
transistor Q1 is in the Off state, the power module is
ON. Maximum allowable leakage current of the
transistor when Von/off = VIN,max is 10µA. Applying a
logic-low when the transistor Q1 is turned-On, the power
module is OFF. During this state VOn/Off must be less
than 0.3V. When not using positive logic On/off pin,
leave the pin unconnected or tie to VIN.
Q1
R2
R1
Q2
R3
R4
Q3 CSS
GND
VIN+
ON/OFF
PWM Enable
+
_
ON/OFF
V
ION/OFF
MODULE
Figure 27. Circuit configuration for using positive
logic On/OFF.
For negative logic On/Off devices, the circuit
configuration is shown is Figure 28. The On/Off pin is
pulled high with an external pull-up resistor (typical Rpull-
up = 68k, +/- 5%). When transistor Q1 is in the Off state,
logic High is applied to the On/Off pin and the power
module is Off. The minimum On/off voltage for logic
High on the On/Off pin is 2.5Vdc. To turn the module
ON, logic Low is applied to the On/Off pin by turning ON
Q1. When not using the negative logic On/Off, leave
the pin unconnected or tie to GND.
Q1
R1
R2
Q2 CSS
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
pull-up
R
ON/OFF
Figure 28. Circuit configuration for using negative
logic On/OFF.
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 3.0A.
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 protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit will
shutdown if the thermal reference point Tref, exceeds
125oC (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.
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 13
Feature Descriptions (continued)
Output Voltage Programming
The output voltage of the Austin LynxTM II SMT can be
programmed to any voltage from 0.75 Vdc to 5.5 Vdc by
connecting a single resistor (shown as Rtrim in Figure
29) between the TRIM and GND pins of the module.
Without an external resistor between the TRIM pin and
the ground, the output voltage of the module is 0.7525
Vdc. To calculate the value of the resistor Rtrim for a
particular output voltage Vo, use the following equation:
Ω
⎥
⎦
⎤
⎢
⎣
⎡−
−
=1000
7525.0
10500
Vo
Rtrim
For example, to program the output voltage of the
Austin LynxTM II module to 1.8 Vdc, Rtrim is calculated is
follows:
⎥
⎦
⎤
⎢
⎣
⎡−
−
=1000
75.08.1
10500
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.
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
VO, (V) Rtrim (KΩ)
0.7525 Open
1.2 22.46
1.5 13.05
1.8 9.024
2.5 5.009
3.3 3.122
5.0 1.472
By a 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.lineagepower.com under the Design
Tools section, helps determine the required external trim
resistor needed for a specific output voltage.
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 LynxTM II 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 the Output pin
for margining-down. Figure 30 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.
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 30. Circuit Configuration for margining
Output voltage.
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 14
Feature Descriptions (continued)
Voltage Sequencing
The Austin LynxTM II series of modules include a
sequencing feature, EZ-SEQUENCETM 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 tie the SEQ pin to VIN or
leave it unconnected.
When an analog voltage is applied to the SEQ pin, the
output voltage tracks this voltage until the output
reaches the set-point voltage. The SEQ voltage must
be set higher than the set-point voltage of the module.
The output voltage follows the voltage on the SEQ pin
on a one-to-one volt basis. By connecting multiple
modules together, customers can get multiple modules
to track their output voltages to the voltage applied on
the SEQ pin.
For proper voltage sequencing, first, input voltage is
applied to the module. The On/Off pin of the module is
left unconnected (or tied to GND for negative logic
modules or tied to VIN for positive logic modules) 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.
During this time, potential of 50mV (± 10 mV) is
maintained 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 LynxTM II, contact the
Lineage Power technical representative for preliminary
application note on output voltage sequencing using
Austin Lynx II series.
Remote Sense
The Austin LynxTM II SMT 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 31). 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 pin of the
module.
VO
COM
VIN(+ )
COM
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
Sense
Figure 31. Remote sense circuit configuration.
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 15
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 32. The
derating data applies to airflow in either direction of the
module’s long axis.
Air Flow
Tref
To
p
View
Bottom View
Figure 32. Tref Temperature measurement location.
The thermal reference point, Tref used in the
specifications is shown in Figure 32. For reliable
operation this temperature should not exceed 115 oC.
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 at different local ambient temperature (TA) for
airflow conditions ranging from natural convection and
up to 2m/s (400 ft./min) are shown in the Characteristics
Curves section.
A
ir
flow
x
Po w e r M o d ule
W
ind Tunnel
PWBs
8.3_
(0.325)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 Lineage Power technical
representative for more details.
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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.)
Top View
Side View
Bottom View
PIN FUNCTION
1 Vo
2 Vo
3 Sense+
4 Vo
5 GND
6 GND
7 VIN
8 VIN
B SEQ
9 Trim
10 On/Off
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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.)
PIN FUNCTION
1 Vo
2 Vo
3 Sense+
4 Vo
5 GND
6 GND
7 VIN
8 VIN
B SEQ
9 Trim
10 On/Off
Data Sheet
October 1, 2009
Austin LynxTM II 12V SIP Non-isolated Power Modules:
8.3 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 19
Document No: DS04-023 ver. 1.25
PDF name: lynx_II_sip_12v_ds.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 2. Device Codes
Device Code
Input
Voltage
Range
Output
Voltage
Output
Current
Efficiency
3.3V@ 10A
On/Off
Logic
Connector
Type Comcodes
ATA010A0X3 8.3 – 14Vdc 0.75 – 5.5Vdc 10 A 93.0% Negative SIP 108989050
ATA010A0X43 8.3 – 14Vdc 0.75 – 5.5Vdc 10 A 93.0% Positive SIP 108989067
ATA010A0X3Z 8.3 – 14Vdc 0.75 – 5.5Vdc 10 A 93.0% Negative SIP CC109104667
ATA010A0X43Z 8.3 – 14Vdc 0.75 – 5.5Vdc 10 A 93.0% Positive SIP CC109104683
-Z refers to RoHS compliant codes
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: techsupport1@lineagepower.com
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Tel: +65 6593 7211
Europe, Middle-East and Africa Headquarters
Tel: +49 898 780 672 80
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Tel: +91 80 28411633
Lineage Powe r reserves the right to make changes to the p roduct(s) or information contained herein without not ice. No liability is assumed as a result of their use or
a
pplication. No rights under any patent accompany the sale of an y such product(s) or information.
Lineage Power DC-DC products are protected unde r various patents. Information on the se patents is available at www.lineagepower.com/patents.
©
2009 Linea
g
e Power Cor
p
oration
,
(
Plano
,
Texas
)
All Inte rnational Ri
g
hts Reserved.
