LINEAGEPOWER ATH006A0X-SRZ

Data Sheet
June 24, 2008
Austin MicrolynxTM II SMT Non-isolated Power Modules:
2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A Output Current
RoHS Compliant
EZ-SEQUENCETM
Features
ƒ
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
ƒ
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
ƒ
Flexible output voltage sequencing EZTM
SEQUENCE
ƒ
Delivers up to 6A output current
ƒ
High efficiency – 96% at 3.3V full load (VIN = 5.0V)
ƒ
Small size and low profile:
27.9 mm x 11.4 mm x 7.24 mm
(1.10 in x 0.45 in x 0.285 in)
Applications
ƒ
Distributed power architectures
ƒ
Intermediate bus voltage applications
ƒ
Telecommunications equipment
ƒ
ƒ
Low output ripple and noise
ƒ
High Reliability:
o
Calculated MTBF = 12.8M hours at 25 C Full-load
ƒ
Output voltage programmable from 0.75 Vdc to
3.63Vdc via external resistor
Servers and storage applications
ƒ
Line Regulation: 0.3% (typical)
ƒ
Networking equipment
ƒ
Load Regulation: 0.4% (typical)
ƒ
Enterprise Networks
ƒ
Temperature Regulation: 0.4 % (typical)
ƒ
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
ƒ
Remote On/Off
ƒ
Output overcurrent protection (non-latching)
ƒ
Wide operating temperature range (-40°C to 85°C)
ƒ
UL* 60950-1Recognized, CSA C22.2 No.
60950-1-03 Certified, and VDE‡ 0805:2001-12
(EN60950-1) Licensed
ƒ
ISO** 9001 and ISO 14001 certified manufacturing
facilities
†
Description
Austin MicroLynxTM II SMT (surface mount technology) power modules are non-isolated dc-dc converters that can
deliver up to 6A of output current with full load efficiency of 96.0% 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
TM
TM
range of input voltage (VIN = 2.4 – 5.5Vdc). Austin MicroLynx II has a sequencing feature, EZ-SEQUENCE that
enable designers to implement various types of output voltage sequencing when powering multiple modules on
board.
* 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: DS03-107 ver. 1.03
PDF name: microlynx_II_smt_ds.pdf
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter
Device
Symbol
Min
Max
Unit
All
VIN
-0.3
5.8
Vdc
Sequencing voltage
All
Vseq
-0.3
VIN,max
Vdc
Operating Ambient Temperature
All
TA
-40
85
°C
All
Tstg
-55
125
°C
Input Voltage
Continuous
(see Thermal Considerations section)
Storage Temperature
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Device
Symbol
Min
Typ
Max
Unit
2.4
⎯
5.5
Vdc
6.0
Adc
Operating Input Voltage
Vo,set ≤ 3.63
VIN
Maximum Input Current
All
IIN,max
VO,set = 0.75 Vdc
IIN,No load
20
mA
VO,set = 3.3Vdc
IIN,No load
45
mA
All
IIN,stand-by
0.6
mA
Inrush Transient
All
It
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
Input Ripple Rejection (120Hz)
All
30
(VIN= VIN, min to VIN, max, IO=IO, max )
Input No Load Current
(VIN = VIN, nom, Io = 0, module enabled)
Input Stand-by Current
(VIN = VIN, nom, module disabled)
2
0.04
2
As
mAp-p
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 fastacting 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.
LINEAGE POWER
2
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Electrical Specifications (continued)
Parameter
Output Voltage Set-point
Device
Symbol
Min
Typ
Max
Unit
All
VO, set
-2.0
⎯
+2.0
% VO, set
All
VO, set
–3.0
⎯
+3.0
% VO, set
All
VO
0.7525
3.63
Vdc
(VIN=IN, min, IO=IO, max, TA=25°C)
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range
Selected by an external resistor
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
RMS (5Hz to 20MHz bandwidth)
All
⎯
10
15
mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth)
All
⎯
40
50
mVpk-pk
μF
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1μF ceramic//10μFtantalum capacitors)
External Capacitance
ESR ≥ 1 mΩ
All
CO, max
⎯
⎯
1000
ESR ≥ 10 mΩ
All
CO, max
⎯
⎯
5000
μF
Output Current
All
Io
0
6
Adc
Output Current Limit Inception (Hiccup Mode )
All
IO, lim
⎯
220
⎯
% Io
All
IO, s/c
⎯
2
⎯
Adc
VO, set = 0.75Vdc
η
81.2
%
VIN= VIN, nom, TA=25°C
VO, set = 1.2Vdc
η
86.8
%
IO=IO, max , VO= VO,set
VO,set = 1.5Vdc
η
88.8
%
VO,set = 1.8Vdc
η
89.7
%
VO,set = 2.5Vdc
η
92.5
%
(VO= 90% of VO, set)
Output Short-Circuit Current
(VO≤250mV) ( Hiccup Mode )
Efficiency
Switching Frequency
VO,set = 3.3Vdc
η
All
fsw
⎯
95.4
300
⎯
kHz
%
All
Vpk
⎯
130
⎯
mV
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C)
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
All
ts
⎯
25
⎯
μs
Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation)
LINEAGE POWER
3
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Electrical Specifications (continued)
Parameter
Device
Symbol
Min
Typ
Max
Unit
All
Vpk
⎯
50
⎯
mV
Dynamic Load Response
(dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C)
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)
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
All
Vpk
⎯
50
⎯
mV
Settling Time (Vo<10% peak deviation)
All
ts
⎯
50
⎯
μs
General Specifications
Parameter
Min
Calculated MTBF (IO=IO, max, TA=25°C)
Weight
LINEAGE POWER
Typ
Max
12,841,800
⎯
2.8 (0.1)
Unit
Hours
⎯
g (oz.)
4
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
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
All
VIH
―
―
VIN, max
V
μA
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)
Input High Current
All
IIH
―
―
10
Input Low Voltage (Module OFF)
All
VIL
-0.2
―
0.3
V
Input Low Current
All
IIL
―
0.2
1
mA
All
VIH
1.5
―
VIN,max
Vdc
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)
Input High Current
All
IIH
Input Low Voltage (Module ON)
All
VIL
0.2
1
mA
―
0.3
Vdc
Input low Current
All
IIL
―
10
μA
All
Tdelay
―
3.9
―
msec
All
Tdelay
―
3.9
―
msec
All
Trise
―
4.2
8.5
msec
―
1
% VO, set
-0.2
Turn-On Delay and Rise Times
o
(IO=IO, max , VIN = VIN, nom, TA = 25 C, )
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)
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)
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
Output voltage overshoot – Startup
o
IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 C
Sequencing Delay time
Delay from VIN, min to application of voltage on SEQ pin
Tracking Accuracy
All
TsEQ-delay
(Power-Up: 2V/ms)
All
|VSEQ –Vo |
100
200
mV
(Power-Down: 1V/ms)
All
|VSEQ –Vo |
200
400
mV
All
Tref
150
⎯
°C
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Overtemperature Protection
10
⎯
msec
(See Thermal Considerations section)
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
LINEAGE POWER
All
2.2
V
All
2.0
V
5
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Characteristic Curves
TM
91
98
88
95
85
EFFICIENCY, η (%)
EFFICIENCY, η (%)
The following figures provide typical characteristics for the Austin MicroLynx
82
79
VIN=2.4V
76
VIN=5V
73
VIN=5.5V
70
0
1
2
3
4
5
II SMT modules at 25ºC.
92
89
86
83
VIN=2.4V
80
VIN=5V
77
VIN=5.5V
74
6
0
1
OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).
4
5
6
98
91
95
88
92
EFFICIENCY, η (%)
EFFICIENCY, η (%)
3
Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
94
85
82
V IN=2.4V
79
VIN=5V
76
VIN=5.5V
73
89
86
83
V IN=3V
80
V IN=5V
77
V IN=5.5V
74
70
0
1
2
3
4
5
6
0
1
OUTPUT CURRENT, IO (A)
95
88
92
EFFICIENCY, η (%)
98
91
85
VIN=2.4V
79
VIN=5V
76
VIN=5.5V
73
70
0
1
2
3
4
5
OUTPUT CURRENT, IO (A)
Figure3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
LINEAGE POWER
3
4
5
6
Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
94
82
2
OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).
EFFICIENCY, η (%)
2
OUTPUT CURRENT, IO (A)
6
89
86
83
V IN=4.5V
80
V IN=5V
77
V IN=5.5V
74
0
1
2
3
4
5
6
OUTPUT CURRENT, IO (A)
Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
6
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Characteristic Curves (continued)
INPUT CURRENT, IIN (A)
Io =3 A
5
Io =0 A
4
3
2
1
0
1
1.75
2 .5
3 .2 5
4
5.5
TIME, t (5 μs/div)
TIME, t (2μs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 5.0V dc, Vo = 3.3 Vdc, Io=6A).
LINEAGE POWER
IO (A) (2A/div)
TIME, t (5 μs/div)
VO (V) (50mV/div)
Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).
IO (A) (2A/div)
VO (V) (20mV/div)
OUTPUT VOLTAGE
Figure 8. Typical Output Ripple and Noise
(Vin = 5.0V dc, Vo = 0.75 Vdc, Io=6A).
OUTPUT CURRENT, OUTPUT VOLTAGE
TIME, t (2μs/div)
VO (V) (100mV/div)
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).
VO (V) (20mV/div)
Figure 7. Input voltage vs. Input Current
(Vout =2.5Vdc).
OUTPUT CURRENT, OUTPUT VOLTAGE
4 .75
OUTPUT VOLTAGE
INPUT VOLTAGE, VIN (V)
II SMT modules at 25ºC.
VO (V) (100mV/div)
Io =6 A
6
TM
IO (A) (2A/div)
7
OUTPUT CURRENT, OUTPUT VOLTAGE
The following figures provide typical characteristics for the MicroLynx
TIME, t (10μs/div)
Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 μF Polymer Capacitors).
7
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Characteristic Curves (continued)
TM
VIN (V) (2V/div)
Vo (V) (1V/div)
OUTPUT VOLTAGE, INPUT VOLTAGE
VOn/off (V) (2V/div)
TIME, t (2 ms/div)
Figure 17 Typical Start-Up Using Remote On/Off with
Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias
=1.0Vdc).
OUTPUT CURRENT,
On/Off VOLTAGE
VOn/off (V) (2V/div)
VOV) (1V/div)
OUTPUT VOLTAGE
TIME, t (2 ms/div)
Figure 15. Typical Start-Up Using Remote On/Off with
Low-ESR external capacitors (7x150uF Polymer) (Vin
= 5.0Vdc, Vo = 3.3Vdc, Io = 6A, Co = 1050μF).
LINEAGE POWER
On/Off VOLTAGE
VOn/off (V) (2V/div)
VOV) (1V/div)
TIME, t (2 ms/div)
Figure 14. Typical Start-Up Using Remote On/Off
(Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A).
Figure 16. Typical Start-Up with application of Vin
(Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A).
VOV) (1V/div)
On/Off VOLTAGE
OUTPUT VOLTAGE
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 3.3Vdc, Cext
= 2x150 μF Polymer Capacitors).
TIME, t (2 ms/div)
OUTPUT VOLTAGE
TIME, t (10μs/div)
II SMT modules at 25ºC.
IO (A) (5A/div)
OUTPUT CURRENT, OUTPUTVOLTAGE
IO (A) (2A/div)
VO (V) (50mV/div)
The following figures provide typical characteristics for the Austin MicroLynx
TIME, t (5ms/div)
Figure 18. Output short circuit Current
(Vin = 5.0Vdc, Vo = 0.75Vdc).
8
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Characteristic Curves (continued)
TM
The following figures provide thermal derating curves for the Austin MicroLynx
8
6.0
4.5
NC
3.0
0.5m/s (100 LFM )
1.5
1.0m/s (200 LFM )
0.0
20
30
40
50
60
70
80
90
O
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
7.5
II SMT modules.
6
5
NC
3
0.5m/s (100 LFM )
2
1.0m/s (200 LFM )
0
20
30
40
50
60
70
80
90
O
AMBIENT TEMPERATURE, TA C
AMBIENT TEMPERATURE, TA C
Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0,
Vo=3.3Vdc).
Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 3.3dc,
Vo=0.75 Vdc).
OUTPUT CURRENT, Io (A)
7.5
6.0
4.5
NC
3.0
0.5m/s (100 LFM )
1.5
1.0m/s (200 LFM )
0.0
20
30
40
50
60
70
80
90
O
AMBIENT TEMPERATURE, TA C
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=0.75 Vdc).
OUTPUT CURRENT, Io (A)
7.5
6.0
4.5
NC
3.0
0.5m/ s (100 LFM )
1.5
1.0m/s (200 LFM )
0.0
20
30
40
50
60
70
80
90
O
AMBIENT TEMPERATURE, TA C
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 3.3Vdc,
Vo=2.5 Vdc).
LINEAGE POWER
9
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Test Configurations
Design Considerations
CURRENT PROBE
TO OSCILLOSCOPE
VIN(+)
2x100μF
Tantalum
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Figure 23. Input Reflected Ripple Current Test Setup.
COPPER STRIP
VO (+)
RESISTIVE
LOAD
1uF
.
10uF
120
SCOPE
COM
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 24. Output Ripple and Noise Test Setup.
Rdistribution
Rcontact
Rcontact
VIN(+)
RLOAD
VO
Rcontact
Rcontact
COM
Rdistribution
Figure 25. Output Voltage and Efficiency Test Setup.
VO. IO
η =
VIN. IIN
80
60
40
Vin = 3.3V
20
Vin = 5.0V
0
0
1
2
3
4
x
100 %
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various output
with 1x150 µF polymer and 1x47 µF ceramic
capacitors at the input (80% of Io,max).
Rdistribution
COM
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Efficiency
100
VO
VIN
Rdistribution
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)
E.S.R.<0.1Ω
@ 20°C 100kHz
120
Input Ripple Voltage (mVp-p)
BATTERY
CIN
CS 1000μF
Electrolytic
TM
The Austin MicroLynx II 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.
LTEST
1μH
Input Filtering
100
80
60
40
Vin = 3.3V
20
Vin = 5.0V
0
0
1
2
3
4
Output Voltage (Vdc)
Figure 27. Input ripple voltage for various output
with 2x150 µF polymer and 2x47 µF ceramic
capacitors at the input (80% of Io,max).
LINEAGE POWER
10
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Design Considerations (continued)
Safety Considerations
Output Filtering
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.
TM
The Austin MicroLynx II 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.
LINEAGE POWER
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 6A in the positive
input lead.
11
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Feature Description
Remote On/Off
VIN+
TM
The Austin Lynx 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 28. 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.
MODULE
VIN+
R2
ON/OFF
+
I ON/OFF
VON/OFF
Q2
PWM Enable
R3
+
VON/OFF
PWM Enable
R1
Q2
Q1
CSS
R2
GND
_
Figure 29. 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 2A.
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
Q3
CSS
R4
GND
I ON/OFF
ON/OFF
Input Undervoltage Lockout
R1
Q1
MODULE
Rpull-up
_
Figure 28. Circuit configuration for using positive
logic On/OFF.
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
o
thermal reference point Tref, exceeds 150 C (typical), but
the thermal shutdown is not intended as a guarantee that
the unit will survive temperatures beyond its rating. The
module will automatically restart after it cools down.
For negative logic On/Off devices, the circuit
configuration is shown is Figure 29. The On/Off pin is
pulled high with an external pull-up resistor (typical Rpull-up
= 5k, +/- 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 1.5Vdc. 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.
LINEAGE POWER
12
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Feature Descriptions (continued)
Output Voltage Programming
TM
The output voltage of the Austin MicroLynx II 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 30) between the TRIM and GND pins of the
module. Without an external resistor between 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 = ⎢
− 5110⎥ Ω
Vo
−
0
.
7525
⎣
⎦
For example, to program the output voltage of the Austin
TM
MicroLynx II module to 1.8 Vdc, Rtrim is calculated is
follows:
⎤
⎡ 21070
Rtrim = ⎢
− 5110⎥
⎦
⎣1.8 − 0.7525
By using a 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.
Voltage Margining
Output voltage margining can be implemented in the
TM
Austin MicroLynx 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 31 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
Rtrim = 15.004 kΩ
V IN(+)
V O(+)
Rmargin-down
Vout
Austin Lynx or
Lynx II Series
Q2
Trim
ON/OFF
LOAD
TRIM
Rmargin-up
R trim
Rtrim
GND
Q1
Figure 30. Circuit configuration to program output
voltage using an external resistor.
Table 1 provides Rtrim values required for some common
output voltages.
GND
Figure 31. Circuit Configuration for margining
Output voltage.
Table 1
VO, 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
LINEAGE POWER
13
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Feature Descriptions (continued)
Voltage Sequencing
Austin MicroLynxTM 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 to ensure a controlled shutdown of the
modules.
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
TM
during start-up. When using the EZ-SEQUENCE
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 EZTM
TM
SEQUENCE feature of Austin MicroLynx II , contact
Lineage Power technical representative for preliminary
application note on output voltage sequencing using
Austin Lynx II series.
LINEAGE POWER
14
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
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.
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.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
Air Flow
76.2_
(3.0)
Tref1 (inductor winding)
x
7.24_
(0.285)
Probe Location
for measuring
airflow and
ambient
temperature
Air
flow
Figure 33. Thermal Test Set-up.
Top View
Heat Transfer via Convection
Tref2
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.
Bottom View
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
o
not exceed 125 C.
The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
LINEAGE POWER
15
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
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
On/Off
2
VIN
3
SEQ
4
GND
5
Trim
6
VOUT
Co-planarity (max): 0.102 [0.004]
LINEAGE POWER
16
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
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.)
Surface Mount Pad Layout – Component side view.
LINEAGE POWER
17
Data Sheet
June 24, 2008
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Packaging Details
The Austin MicroLynxTM II SMT versions are 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 Dimensions:
Inside Dimensions:
Width
LINEAGE POWER
330.2 mm (13.00)
177.8 mm (7.00”)
44.0 mm (1.73”)
18
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
Surface Mount Information
Pick and Place
TM
The Austin MicroLynx II 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 placing. The label meets all the
requirements for surface mount processing, as well as
safety standards and is able to withstand maximum
reflow temperature. The label also carries product
information such as product code, serial number and
location of manufacture.
connection. Sufficient time must be allowed to fuse
the plating on the connection to ensure a reliable
solder joint. There are several types of SMT reflow
technologies currently used in the industry. These
surface mount power modules can be reliably
soldered using natural forced convection, IR (radiant
infrared), or a combination of convection/IR. For
reliable soldering the solder reflow profile should be
established by accurately measuring the modules CP
connector temperatures.
300
P eak Temp 235oC
REFLOW TEMP (°C)
250
200
150
So ak zo ne
30-240s
100
Tlim above
205oC
P reheat zo ne
max 4oCs -1
50
Figure 34. Pick and Place Location.
Co o ling
zo ne
1-4oCs -1
Heat zo ne
max 4oCs -1
0
Nozzle Recommendations
Tin Lead Soldering
TM
The Austin MicroLynx II 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.
REFLOW TIME (S)
Figure 35. Reflow Profile for Tin/Lead (Sn/Pb)
process.
240
235
MAX TEMP SOLDER (°C)
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 8 mm max.
230
225
220
215
210
205
200
0
10
20
30
40
50
60
o
Figure 36. Time Limit Curve Above 205 C for
Tin/Lead (Sn/Pb) process.
In a conventional Tin/Lead (Sn/Pb) solder process
peak reflow temperatures are limited to less than
o
o
235 C. Typically, the eutectic solder melts at 183 C,
wets the land, and subsequently wicks the device
LINEAGE POWER
19
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Surface Mount Information (continued)
Lead Free Soldering
The –Z version Austin MicroLynx II 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.
Modules: Soldering and Cleaning Application Note
(AN04-001).
300
Per J-STD-020 Rev. C
Peak Temp 260°C
250
Reflow Temp (°C)
Data Sheet
June 24, 2008
200
150
* Min. Time Above 235°C
15 Seconds
Heating Zone
1°C/Second
Cooling
Zone
*Time Above 217°C
60 Seconds
100
50
0
Reflow Time (Seconds)
Figure 37. Recommended linear reflow profile
using Sn/Ag/Cu solder.
MSL Rating
The Austin MicroLynx II modules have a MSL rating of
1.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount
packages is detailed in J-STD-033 Rev. A (Handling,
Packing, Shipping and Use of Moisture/Reflow
Sensitive Surface Mount Devices). Moisture barrier
bags (MBB) with desiccant are required for MSL
ratings of 2 or greater. These sealed packages
should not be broken until time of use. Once the
original package is broken, the floor life of the product
at conditions of ≤ 30°C and 60% relative humidity
varies according to the MSL rating (see J-STD-033A).
The shelf life for dry packed SMT packages will be a
minimum of 12 months from the bag seal date, when
stored at the following conditions: < 40° C, < 90%
relative humidity.
Post Solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect
both the reliability of a power module and the
testability of the finished circuit-board assembly. For
guidance on appropriate soldering, cleaning and
drying procedures, refer to Board Mounted Power
LINEAGE POWER
20
Austin MicroLynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
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@ 6A
On/Off
Logic
Connector
Type
Comcodes
ATH006A0X-SR
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
Negative
SMT
108988358
ATH006A0X-SRZ
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
Negative
SMT
CC109104535
ATH006A0X4-SR
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
Positive
SMT
108988366
ATH006A0X4-SRZ
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
Positive
SMT
108996708
-Z refers to RoHS compliant parts
Asia-Pacific Headquarters
Tel: +65 6416 4283
World Wide Headquarters
Lineage Power Corporation
3000 Skyline Drive, Mesquite, TX 75149, USA
+1-800-526-7819
(Outside U.S.A.: +1-972-284-2626)
www.lineagepower.com
e-mail: [email protected]
Europe, Middle-East and Africa Headquarters
Tel: +49 89 6089 286
India Headquarters
Tel: +91 80 28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
application. No rights under any patent accompany the sale of any such product(s) or information.
© 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved.
LINEAGE POWER
21
Document No: DS03-107 ver. 1.03
PDF name: microlynx_II_smt_ds.pdf