Page 1
Data Sheet
September 10, 2013
Austin LynxTM SMT Non-isolated Power Modules:
3.0Vdc –5.5Vdc Input; 0.75Vdc to 3.63Vdc Output;10A Output Current
RoHS Compliant
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)
Delivers up to 10A output current
High efficiency – 95% at 3.3V full load (V
Small size and low profile:
33.0 mm x 13.5 mm x 8.28 mm
(1.30 in x 0.53 in x 0.326 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 15.7 M hours at 25
Constant switching frequency (300 kHz)
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
Remote Sense(optional)
Over temperature protection
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to 85°C)
†
UL* 60950-1Recognized, CSA
03 Certified, and VDE
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
‡
0805:2001-12 (EN60950-1)
C22.2 No. 60950-1-
= 5.0V)
IN
o
C Full-load
Description
Austin LynxTM SMT (surface mount technology) power modules are non-isolated dc-dc converters that can deliver
up to 10A of output current with full load efficiency of 95% at 3.3V output. These modules provide a precisely
regulated output voltage programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide range of input
voltage (V
and space-efficient solutions. Standard features include remote On/Off, remote sense, programmable output
voltage, over current and over temperature protections.
* UL is a re gistered trademark of Underwriters Laboratories, Inc.
†
CSA is a reg istered trademark of Canadian Standards Associat ion.
‡
VDE is a t rademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Or ganization of Standards
= 3.0 – 5.5Vdc). Their open-frame construction and small footprint enable designers to develop cost-
IN
Document No: DS04-031 ver. 1.55
PDF name: lynx_po_smt.pdf
Page 2
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
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 V
Continuous
Operating Ambient Temperature All T
IN
A
-0.3 5.8 Vdc
-40 85 °C
(see Thermal Considerations section)
Storage Temperature All T
stg
-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 V
Maximum Input Current All I
(VIN= V
IN, min
to V
IN, max
, IO=I
O, max VO,set
= 3.3Vdc)
Input No Load Current V
≤ V
– 0.5V VIN 3.0
O,set
IN
IN,max
= 0.75Vdc I
O,set
IN,No load
⎯
5.5 Vdc
10 Adc
25 mA
(VIN = 5.0Vdc, IO = 0, module enabled) V
Input Stand-by Current All I
= 3.3Vdc I
O,set
30 mA
IN,No load
1.5 mA
IN,stand-by
(VIN = 5.0Vdc, module disabled)
Inrush Transient All I2t 0.1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; V
V
= I
IN, max, IO
; See Test configuration section)
Omax
IN, min
to
All 100 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.
LINEAGE POWER 2
Page 3
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point All V
(VIN=V
IN, min
, IO=I
, TA=25°C)
O, max
Output Voltage All V
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All V
Selected by an external resistor
O, set
O, set
O
Output Regulation
Line (VIN=V
Load (IO=I
Temperature (T
IN, min
O, min
to V
to I
ref=TA, min
) All
IN, max
) All
O, max
to T
) All ⎯ 0.4
A, max
Output Ripple and Noise on nominal output
(VIN=V
IN, nom
and IO=I
O, min
to I
O, max
Cout = 1μF ceramic//10μFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth) All
Peak-to-Peak (5Hz to 20MHz bandwidth) All
External Capacitance
ESR ≥ 1 mΩ All C
ESR ≥ 10 mΩ All C
Output Current All I
Output Current Limit Inception (Hiccup Mode ) All I
(VO= 90% of V
)
O, set
Output Short-Circuit Current All I
(VO≤250mV) ( Hiccup Mode )
Efficiency V
VIN= V
IO=I
, TA=25°C V
IN, nom
= V
O, max , VO
V
O,set
V
V
V
= 0.75Vdc η 82.5 %
O,set
= 1.2Vdc η 88.0 %
O, set
= 1.5Vdc η 89.5 %
O,set
= 1.8Vdc η 91.0 %
O,set
= 2.5Vdc η 93.0 %
O,set
= 3.3Vdc η 95.0 %
O,set
Switching Frequency All f
O, max
O, max
o
O, lim
O, s/c
sw
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = V
IN, nom
; TA=25°C)
Load Change from Io= 50% to 100% of
Io,max; 1μF ceramic// 10 μF tantalum
All V
pk
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=2.5A/μs; VIN = V
IN, nom
; TA=25°C)
Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum
All t
All V
s
pk
Peak Deviation
Settling Time (Vo<10% peak deviation)
All t
s
-2.0 V
-3%
+2.0 % V
O, set
⎯
+3% % V
0.7525 3.63 Vdc
⎯
⎯
⎯
⎯
0.3
0.4
⎯
⎯
⎯
8 15 mV
25 50 mV
% V
% V
% V
⎯ ⎯
⎯ ⎯
1000 μF
5000 μF
0 10 Adc
⎯
⎯
220
2
⎯
⎯
⎯
⎯
⎯
⎯
⎯
300
200
25
200
25
⎯
⎯
⎯ μs
⎯
⎯ μs
O, set
O, set
O, set
O, set
O, set
pk-pk
% I
Adc
kHz
mV
mV
rms
o
LINEAGE POWER 3
Page 4
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(dIo/dt=2.5A/μs; V VIN = V
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=2.5A/μs; VIN = V
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
IN, nom
IN, nom
; TA=25°C)
; TA=25°C)
All V
All t
All V
All t
pk
s
pk
s
⎯
⎯
⎯
⎯
100
100
100
100
⎯
⎯ μs
⎯
⎯ μs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=I
Telecordia SR-332 Issue 1: Method 1 Case 3
Weight
, TA=25°C) 15,726,000 Hours
O, max
⎯
5.6 (0.2)
⎯
g (oz.)
mV
mV
LINEAGE POWER 4
Page 5
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
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
(On/Off is open collector/drain logic input;
Signal referenced to GND - See feature description
section)
Input High Voltage (Module ON) All VIH ― ― 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
Turn-On Delay and Rise Times
(IO=I
O, max , VIN=VIN, nom, TA
Case 1: On/Off input is set to Logic High (Module
ON) and then input power is applied (delay from
instant at which V
Case 2: Input power is applied for at least one second
and then the On/Off input is set to logic High (delay from
instant at which Von/Off=0.3V until Vo=10% of Vo, set)
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
Output voltage overshoot – Startup ―
IO= I
; VIN = 3.0 to 5.5Vdc, TA = 25 oC
O, max
Remote Sense Range ― ― 0.5 V
Overtemperature Protection
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold All
Turn-off Threshold All
= 25 oC)
= V
IN
until Vo=10% of Vo,set)
IN, min
All Tdelay ― 3.9 ― msec
All Tdelay ― 3.9 ― msec
All Trise
All T
ref
V
IN, max
― 4.2 8.5 msec
1
⎯
2.2 V
2.0 V
125
⎯
% V
°C
O, set
LINEAGE POWER 5
Page 6
Data Sheet
O
(A)
)
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Characteristic Curves
The following figures provide typical characteristics for the Austin LynxTM SMT modules at 25ºC.
90
87
84
81
78
75
EFFICIENCY, (η)
72
02.557.510
VIN = 3.0V
VIN = 5.0V
VIN = 5.5V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).
93
90
87
84
81
78
EFFICIENCY, (η)
75
72
0 2.557.510
VIN = 3.0V
VIN = 5.0V
VIN = 5.5V
OUTPUT CURRENT, I
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).
94
91
88
85
82
79
76
EFFICIENCY, (η)
73
70
02.557.510
VIN = 3.0V
VIN = 5.0V
VIN = 5.5V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
96
93
90
87
84
81
78
EFFICIENCY, (η)
75
72
02.557.510
Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
10 0
97
94
91
88
85
82
79
EFFICIENCY, (η)
76
73
02.557.510
OUTPUT CURRENT, IO (A
Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
10 0
97
94
91
88
85
82
EFFICIENCY, (η)
79
76
0 2.557.510
Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
VIN = 3.0V
VIN = 5.0V
VIN = 5.5V
VIN = 3.0V
VIN = 5.0V
VIN = 5.5V
VIN = 4.5V
VIN = 5.0V
VIN = 5.5V
LINEAGE POWER 6
Page 7
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM SMT modules at 25ºC.
10
9
8
7
(A)
IN
6
5
4
3
2
INPUT CURRENT, I
1
0
0.5 1.5 2.5 3.5 4.5 5.5
INPUT VOLTAGE, VIN (V)
Figure 7. Input voltage vs. Input Current (Vo =
2.5Vdc).
Io=10A
Io=5A
Io=0A
(V) (200mV/div)
O
(A) (5A/div) V
O
OUTPUT CURRENT, OUTPUT VOLTAGE
I
TIME, t (10μs/div)
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (10μs/div)
Figure 8. Typical Output Ripple and Noise (Vin = 5.0V
dc, Vo = 0.75 Vdc, Io=10A).
(V) (20mV/div)
O
OUTPUT VOLTAGE
V
TIME, t (2μs/div) TIME, t (20μs/div)
Figure 9. Typical Output Ripple and Noise (Vin = 5.0V
dc, Vo = 3.3 Vdc, Io=10A).
(V) (200mV/div)
O
(A) (5A/div) V
O
OUTPUT CURRENT, OUTPUT VOLTAG
I
Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).
(V) (50mV/div)
O
(A) (5A/div) V
O
OUTPUT CURRENT, OUTPUT VOLTAGE
I
Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 μF Polymer Capacitors).
LINEAGE POWER 7
Page 8
Data Sheet
μ
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM SMT modules at 25ºC.
(V) (50mV/div)
O
(A) (5A/div) V
O
I
OUTPUT CURRENT, OUTPUT VOLTAGE
TIME, t (20μs/div)
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 5.0 Vdc, Cext
= 2x150
On/Off VOLTAGE OUTPUT VOLTAGE
F Polymer Capacitors).
(V)(1V/div)
O
(V) (5V/div) V
On/off
V
TIME, t (2 ms/div) TIME, t (2 ms/div)
Figure 14. Typical Start-Up Using Remote On/Off (Vin
= 5.0Vdc, Vo = 3.3Vdc, Io = 10.0A).
(V)(1V/div)
O
(V) (2V/div) V
On/off
INPUT VOLTAGE OUTPUT VOLTAGE
V
TIME, t (2 ms/div)
Figure 16. Typical Start-Up with application of Vin
(Vin = 5.5Vdc, Vo = 3.3Vdc, Io = 10A).
(V)(1V/div)
O
(V) (2V/div) V
On/off
INPUT VOLTAGE OUTPUT VOLTAGE
V
Figure 17 Typical Start-Up Using Remote On/Off with
Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias
=1.0Vdc).
(V)(1V/div)
O
(A) (10A/div)
O
(V) (5V/div) V
On/off
On/Off VOLTAGE OUTPUT VOLTAGE
V
F
igure 15. Typical Start-Up Using Remote On/Off with
Low-ESR external capacitors (Vin = 5.5Vdc, Vo =
TIME, t (2 ms/div) TIME, t (10ms/div)
OUTPUT CURRENT,
I
Figure 18. Output short circuit Current (Vin =
5.0Vdc, Vo = 0.75Vdc).
3.3Vdc, Io = 10.0A, Co = 1050μF).
LINEAGE POWER 8
Page 9
Data Sheet
A
O
A
O
C
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin LynxTM SMT modules.
12
12
10
8
6
4
NC
2
100 LFM
0
OUTPUT CURRENT, Io (A)
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE, T
C AMBIENT TEMPERATURE, T
Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0,
Vo=0.75Vdc).
OUTPUT CURRENT, Io (A)
12
10
8
6
4
NC
2
100 LFM
0
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=1.8 Vdc).
12
10
8
6
4
NC
2
100 LFM
0
OUTPUT CURRENT, Io (A)
20 30 40 50 60 70 80 90
Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0dc,
Vo=3.3 Vdc).
12
10
8
6
4
N
2
0
OUTPUT CURRENT, Io (A)
20 30 40 50 60 70 80 90
Figure 23. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 3.3Vdc,
Vo=2.5 Vdc).
C
10
8
6
4
NC
2
100 LFM
0
OUTPUT CURRENT, Io (A)
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE, TA OC
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow
(Vin = 5.0Vdc,
Vo=2.5 Vdc).
LINEAGE POWER 9
Page 10
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Test Configurations
TO OSCILLOSCOPE
L
TEST
1μH
CS 1000μF
BATTERY
NOTE: Measure input reflected ripple current with a simulated
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
source induct ance (L
possible battery impedance. Measure current as shown
above.
) of 1μH. Capacit or CS offsets
TEST
Figure 24. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
V
(+)
O
1uF .
COM
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
10uF
GROUND PLANE
Figure 25. Output Ripple and Noise Test Setup.
R
R
contact
distribution
R
R
contact
distribution
NOTE: All volt age meas urements to be taken at th e module
terminals , as shown above. If socket s are us ed then
Kelvin conn ections are requir ed at the modu le termi nals
to avoid measur ement err ors due to soc ket contact
resistance.
VIN(+)
V
IN
COM
Figure 26. Output Voltage and Efficiency Test Setup.
V
. I
O
Efficiency
=
η
VIN. I
O
IN
2x100μF
Tantalum
SCOPE
V
O
COM
CURRENT PROBE
CIN
RESISTIVE
LOAD
V
O
x 100 %
VIN(+)
COM
R
contactRdistribution
R
contactRdistribution
R
LOAD
Design Considerations
Input Filtering
Austin LynxTM SMT 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 27 shows 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 28 shows
the input ripple with 2x150 µF polymer capacitors in
parallel with 2 x 47 µF ceramic capacitor at full load.
200
180
160
140
120
100
80
60
40
20
0
Input Ripple Voltage (mVp-p)
00.511.522.533.5
Output Voltage (Vdc)
Figure 27. Input ripple voltage for various output
with 1x150 µF polymer and 1x47 µF ceramic
capacitors at the input (full load).
140
120
100
80
60
40
20
Input Ripple Voltage (mVp-p)
0
0 0.5 1 1.5 2 2.5 3 3.5
Output Voltage (Vdc)
Figure 28. Input ripple voltage for various output
with 2x150 µF polymer and 2x47 µF ceramic
capacitors at the input (full load).
3.3Vin
5Vin
3.3Vin
5Vin
LINEAGE POWER 10
Page 11
Data Sheet
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Austin Lynx
Design Considerations (continued)
Output Filtering
The Austin LynxTM SMT 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.
TM
SMT Non-isolated Power Modules:
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 fastacting fuse with a maximum rating of 15A in the positive
input lead
.
LINEAGE POWER 11
Page 12
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Feature Description
Remote On/Off
The Austin LynxTM SMT power modules feature an
On/Off pin for remote On/Off operation. The On/Off pin
is an open collector/drain logic input signal (Von/Off)
that is referenced to ground. Circuit configuration for
using the On/Off pin is shown in Figure 29. 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 = V
Applying a logic-low when the transistor Q1 is turnedOn, 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 V
I
ON/OFF
GND
VIN+
IN.
ON/OFF
V
ON/OFF
Q1
R2
+
_
R1
Q2
R3
R4
Figure 29. Circuit configuration for using positive
logic On/OFF.
Remote Sense
The Austin LynxTM SMT power modules offer an option
for Remote Sense feature. When the device code
description includes a suffix “3”, sense pin is added to
the module and the Remote Sense feature is active.
See ordering information at the end of this document for
code description.
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the load via Sense
and GND pins (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, tie
the Sense pin to output pin.
is 10µA.
IN,max
MODULE
PWM Enable
Q3 CSS
R
distribution
R
distribution
R
contact
R
contact
VIN(+)
COM
V
Sense
COM
R
contact Rdistribution
R
contact Rdistribution
R
LOAD
O
Figure 32. Remote sense circuit configuration.
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 3A.
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 T
o
125
C (typical), but the thermal shutdown is not
, exceeds
ref
intended as a guarantee that the unit will survive
temperatures beyond its rating. The module will
automatically restarts after it cools down.
Output Voltage Programming
The output voltage of the Austin LynxTM SMT can be
programmed to any voltage from 0.75 Vdc to 3.63 Vdc
by connecting a single resistor (shown as Rtrim in
Figure 31) 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:
21070
Rtrim
−
Vo
= 5110
7525.0
−
Ω
For example, to program the output voltage of the
Austin Lynx
follows:
TM
II module to 1.8 Vdc, Rtrim is calculated is
21070
=
Rtrim
−
7525.08.1
5110
Ω−
Ω= kRtrim 004.15
LINEAGE POWER 12
Page 13
Data Sheet
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Feature Descriptions (continued)
Output Voltage Programming (continued)
V
V
(+)
IN
(+)
O
Austin Lynx
down
TM
SMT Non-isolated Power Modules:
, from the Trim pin to the Output pin for marginingdown. Figure 32 shows the circuit configuration for
output voltage margining. The POL Programming Tool,
available at www.lineagepower.com under the Design
Tools section, also calculates the values of R
R
margin-down
for a specific output voltage and % margin.
Please consult your local Lineage Power technical
representative for additional details.
Vo
margin-up
and
ON/OFF
GND
TRIM
R
trim
LOAD
Figure 31. Circuit configuration for programming
output voltage using an external resistor.
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
VO, (V)
0.7525 Open
1.2 41.973
1.5 23.077
1.8 15.004
2.5 6.947
3.3 3.160
Rtrim (KΩ)
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 (P
max
= V
o,set
x I
o,max
).
Voltage Margining
Output voltage margining can be implemented in the
Austin Lynx
, from the Trim pin to the ground pin for margining-up
up
the output voltage and by connecting a resistor, R
TM
modules by connecting a resistor, R
margin-
margin-
Rmargin-down
Austin Lynx or
Lynx II Series
Q2
Trim
Rmargin-up
Rtrim
Q1
GND
Figure 32. Circuit Configuration for margining
Output voltage.
LINEAGE POWER 13
Page 14
Data Sheet
A
W
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Austin Lynx
Thermal Considerations
The 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 34. Note that the airflow is parallel to
the long axis of the module as shown in figure 33. The
derating data applies to airflow in either direction of the
module’s long axis.
Top View
TM
SMT Non-isolated Power Modules:
25.4_
ind Tunnel
PWBs
x
8.3_
(0.325)
ir
flow
(1.0)
76.2_
(3.0)
Po we r M o d ul e
Probe Loc ation
for measuring
airflow and
ambient
temperature
T
Bottom View
ref
Air Flow
Figure 33. T
The thermal reference point, T
specifications is shown in Figure 33. For reliable
operation this temperature should not exceed 115
The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame BoardMounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
Temperature measurement location.
ref
used in the
ref
o
C.
Figure 34. 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 (T
airflow conditions ranging from natural convection and
up to 2m/s (400 ft./min) are shown in the Characteristics
Curves section.
) for
A
LINEAGE POWER 14
Page 15
Data Sheet
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Mechanical Outline
Dimensions are in millimeters and (inches).
Tolerances: x.x mm
x.xx mm
± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
± 0.25 mm (x.xxx in ± 0.010 in.)
Austin Lynx
TM
SMT Non-isolated Power Modules:
* Remote sense feature is a customer specified option (code suffix “3”)
PIN FUNCTION
1 On/Off
2 VIN
3 GND
4 VOUT
5 Trim
6 Sense*
LINEAGE POWER 15
Page 16
Data Sheet
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Recommended Pad Layout
Dimensions are in millimeters and (inches).
Tolerances: x.x mm
x.xx mm
± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
± 0.25 mm (x.xxx in ± 0.010 in.)
Austin Lynx
TM
SMT Non-isolated Power Modules:
PIN FUNCTION
1 On/Off
2 VIN
3 GND
4 VOUT
5 Trim
6 Sense*
LINEAGE POWER 16
Page 17
Data Sheet
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
Packaging Details
The Austin LynxTM SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 400
modules per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions
Outside diameter: 330.2 mm (13.00)
Inside diameter: 177.8 mm (7.00”)
Tape Width: 44.0 mm (1.73”)
LINEAGE POWER 17
Page 18
Data Sheet
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Surface Mount Information
Pick and Place
The Austin LynxTM 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 300
product information such as product code, serial
number and location of manufacture.
Figure 35. 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 nozzle
diameter for reliable operation is 3mm. The maximum
nozzle outer diameter, which will safely fit within the
allowable component spacing, is 12 mm max.
Tin Lead Soldering
The Austin LynxTM SMT power 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
o
235
C. Typically, the eutectic solder melts at 183oC,
o
C. The label also carries
Austin Lynx
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)
Figure 35. Reflow Profile for Tin/Lead (Sn/Pb)
process.
MAX TEMP SOLDER (°C)
Figure 36. Time Limit Curve Above 205oC Reflow
for Tin Lead (Sn/Pb) process.
TM
SMT Non-isolated Power Modules:
300
250
200
15 0
10 0
50
0
240
235
230
225
220
215
210
205
200
0 102030405060
Peak T emp 235oC
Heat zo ne
oCs-1
max 4
Soak zo ne
30-240s
Preheat zo ne
oCs-1
max 4
REFLOW TIME (S)
Co o ling
zo ne
oCs-1
1- 4
T
above
lim
o
205
C
LINEAGE POWER 18
Page 19
Data Sheet
p
September 10, 2013
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
Surface Mount Information (continued)
Lead Free Soldering
The –Z version Austin Lynx Programmable 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. 37.
MSL Rating
The Austin Lynx Programmable 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
Austin Lynx
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).
300
250
200
150
100
Reflow Temp (°C)
Figure 37. Recommended linear reflow profile
using Sn/Ag/Cu solder.
TM
SMT Non-isolated Power Modules:
Per J-STD-020 Rev. C
Peak Te m
Heating
Zon e
50
0
Reflow Time (Seconds)
* Min. Time
Above 235°C
*Time Above
217°C
Cooling
Zon e
LINEAGE POWER 19
Page 20
Data Sheet
a
©
September 10, 2013
Austin Lynx
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current
TM
SMT Non-isolated Power Modules:
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
AXH010A0X-SR 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT 108992021
AXH010A0X-SRZ 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT CC109104948
AXH010A0X3-SR* 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT 108992038
AXH010A0X3-SRZ* 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT CC109104931
* Remote sense feature is active and pin 6 is added with code suffix “3”
* -Z refers to RoHS-compliant versions.
Output
Current
Efficiency
3.3V@ 10A
Connector
Type
Comcodes
Asia-Pacific Headquarters
Tel: + 65 6593 7211
World Wide Headquarters
Lineage Power Corporation
601 Shil oh Roa d, Plano, TX 75074, USA
+1-800-526-7 819
(Outsi de U.S.A.: +1-972-244-9428)
www.lineagepower.com
e-mail: techs upport1@lineagepower.com
Linea ge Power res erves th e right to make change s to the prod uct(s) or i nformat ion contained herein without not ice. No l iability is assumed as a result o f their use or
pplication . No righ ts under any patent accompany the sal e of an y such produc t(s) or informati on.
Linea ge Power D C-DC pro ducts are p rotected unde r v ariou s patents. Inf ormation on these patents is av ailable at www. lineagepo wer.com/paten ts.
2009 Line age Power Corporation, (Plan o, Texas) All Inte rn ational Rights Reserved.
Europe, Middle-East and Africa Headquarters
Tel: + 49 898 780 672 80
India Headquarters
Tel: + 91 80 2841163 3
LINEAGE POWER 20
Document No: DS04-031 ver. 1.56
PDF name: lynx_po_smt.pdf
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