Lineage Power ATH006A0X 2.4 - 5.5vdc input; 0.75vdc to 3.63vdc output; 6a output current Datasheet

Data Sheet
June 24, 2008
Austin MicrolynxTM II SIP 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:
25.4 mm x 12.7mm x 6.68 mm
(1.00 in x 0. 5 in x 0.263 in)
Applications
ƒ
Distributed power architectures
ƒ
Intermediate bus voltage applications
ƒ
Telecommunications equipment
ƒ
Servers and storage applications
ƒ
Networking equipment
ƒ
Enterprise Networks
ƒ
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
ƒ
Low output ripple and noise
ƒ
High Reliability:
o
Calculated MTBF = 12.8M hours at 25 C Full-load
ƒ
Programmable Output voltage
ƒ
Line Regulation: 0.3% (typical)
ƒ
Load Regulation: 0.4% (typical)
ƒ
Temperature Regulation: 0.4 % (typical)
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
TM
Austin MicroLynx II SIP 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 range of input voltage (VIN = 2.4 –
TM
TM
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. Their open-frame
construction and small footprint enable designers to develop cost- and space-efficient solutions. In addition to
sequencing, standard features include remote On/Off, programmable output voltage and over current protection.
* UL is a registered trademark of Underwriters Laboratories, Inc.
†
CSA is a registered trademark of Canadian Standards Association.
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
‡
Document No: DS04-024 ver. 1.22
PDF name: microlynx_II_sip_ds.pdf
Data Sheet
June 24, 2008
Austin MicroLynxTM II SIPNon-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
Operating Input Voltage
Vo,set ≤ 3.63
VIN
Maximum Input Current
All
IIN,max
Adc
(VIN= VIN, min to VIN, max, IO=IO, max )
Input No Load Current
6.0
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, 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 SIP 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
⎯
3000
μF
6
Adc
All
CO, max
⎯
Output Current
All
Io
0
Output Current Limit Inception (Hiccup Mode )
All
IO, lim
⎯
220
⎯
% Io
All
IO, s/c
⎯
2
⎯
Adc
ESR ≥ 10 mΩ
(VO= 90% of VO, set)
Output Short-Circuit Current
(VO≤250mV) ( Hiccup Mode )
Efficiency
VIN= VIN, nom, TA=25°C
IO=IO, max , VO= VO,set
Switching Frequency
VO, set = 0.75Vdc
η
81.0
%
VO, set = 1.2Vdc
η
87.0
%
VO,set = 1.5Vdc
η
89.0
%
VO,set = 1.8Vdc
η
90.0
%
VO,set = 2.5Vdc
η
93.0
%
VO,set = 3.3Vdc
η
96.0
%
All
fsw
⎯
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 SIP 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)
Typ
Max
12,841,800
Unit
Hours
per Telecordia SR-332 Issue 1: Method 1 Case 3
Weight
LINEAGE POWER
⎯
2.8 (0.1)
⎯
g (oz.)
4
Austin MicroLynxTM II SIP 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
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
―
―
VIN, 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
Input High Voltage (Module OFF)
All
VIH
1.5
Input High Current
All
IIH
Input Low Voltage (Module ON)
All
VIL
Input low Current
All
IIL
All
Tdelay
All
All
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)
-0.2
―
VIN,max
Vdc
0.2
1
mA
―
0.3
Vdc
―
10
μA
―
3.9
―
msec
Tdelay
―
3.9
―
msec
Trise
―
4.2
8.5
msec
―
1
% VO, set
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 = 2.4 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 Consideration section)
Input Undervoltage Lockout
Turn-on Threshold
All
2.2
V
Turn-off Threshold
All
2.0
V
LINEAGE POWER
5
Austin MicroLynxTM II SIP 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
91
98
88
95
85
EFFICIENCY, η (%)
EFFICIENCY, η (%)
The following figures provide typical characteristics for the Austin MicroLynxTM II SIP modules at 25ºC.
82
79
VIN=2.4V
76
VIN=5V
73
VIN=5.5V
70
0
1
2
3
4
5
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)
2
3
4
5
6
OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).
Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
94
98
91
95
88
92
EFFICIENCY, η (%)
EFFICIENCY, η (%)
2
OUTPUT CURRENT, IO (A)
85
82
VIN=2.4V
79
VIN=5V
76
VIN=5.5V
73
70
0
1
2
3
4
5
OUTPUT CURRENT, IO (A)
Figure 3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
LINEAGE POWER
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 SIP 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)
1
0
1
1.75
2 .5
3 .2 5
4
INPUT VOLTAGE, VIN (V)
VO (V) (20mV/div)
OUTPUT VOLTAGE
Figure 7. Input voltage vs. Input Current
(Vout =2.5Vdc).
TIME, t (2μs/div)
VO (V) (20mV/div)
OUTPUT VOLTAGE
Figure 8. Typical Output Ripple and Noise
(Vin = 5.0V dc, Vo = 0.75 Vdc, Io=6A).
TIME, t (2μs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 5.0V dc, Vo = 3.3 Vdc, Io=6A).
LINEAGE POWER
4 .75
5.5
VO (V) (100mV/div)
IO (A) (2A/div)
2
TIME, t (5 μs/div)
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).
VO (V) (100mV/div)
3
IO (A) (2A/div)
4
OUTPUT CURRENT, OUTPUT VOLTAGE
Io =0 A
TIME, t (5 μs/div)
Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).
VO (V) (100mV/div)
INPUT CURRENT, IIN (A)
Io =3 A
5
IO (A) (2A/div)
Io =6 A
6
OUTPUT CURRENT, OUTPUT VOLTAGE
7
OUTPUT CURRENT, OUTPUT VOLTAGE
The following figures provide typical characteristics for the MicroLynxTM II SIP modules at 25ºC.
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 SIP Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Characteristic Curves (continued)
VOn/off (V) (2V/div)
VOV) (1V/div)
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).
VIN (V) (2V/div)
Vo (V) (1V/div)
OUTPUT VOLTAGE, INPUT VOLTAGE
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
OUTPUT VOLTAGE
Figure 14. Typical Start-Up Using Remote On/Off
(Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A).
VOn/off (V) (2V/div)
On/Off VOLTAGE
VOn/off (V) (2V/div)
VOV) (1V/div)
TIME, t (2 ms/div)
LINEAGE POWER
Figure 16. Typical Start-Up with application of Vin
(Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A).
OUTPUT VOLTAGE
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)
VOV) (1V/div)
TIME, t (10μs/div)
IO (A) (5A/div)
OUTPUT CURRENT, OUTPUTVOLTAGE
IO (A) (2A/div)
VO (V) (100mV/div)
The following figures provide typical characteristics for the Austin MicroLynxTM II SIP modules at 25ºC.
TIME, t (5ms/div)
Figure 18. Output short circuit Current
(Vin = 5.0Vdc, Vo = 0.75Vdc).
8
Austin MicroLynxTM II SIP 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)
The following figures provide thermal derating curves for the Austin MicroLynxTM II SIP modules.
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
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 SIP 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 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.
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 SIP 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 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.
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 SIP 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 SIP 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 SIP 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 SIP can
be programmed to any voltage from 0.75 Vdc to 3.3 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
− 5110⎥
Rtrim = ⎢
⎦
⎣1.8 − 0.7525
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 = 15.004kΩ
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
By using a 1% tolerance trim resistor, set point
tolerance of ±2% is achieved as specified in the
LINEAGE POWER
13
Data Sheet
June 24, 2008
Austin MicroLynxTM II SIP 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
Austin MicroLynxTM II SIP Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Data Sheet
June 24, 2008
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.
Air Flow
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
7.24_
(0.285)
Probe Location
for measuring
airflow and
ambient
temperature
Air
flow
Figure 33. Thermal Test Set-up.
Heat Transfer via Convection
Top View
Tref
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).
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.
LINEAGE POWER
15
Data Sheet
June 24, 2008
Austin MicroLynxTM II SIP Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
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.
LINEAGE POWER
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 RoHScompliant 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.
16
Data Sheet
June 24, 2008
Austin MicroLynxTM II SIP 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
Vo
2
Trim
3
GND
A
SEQ
4
VIN
5
On/Off
LINEAGE POWER
17
Data Sheet
June 24, 2008
Austin MicroLynxTM II SIP 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.)
PIN
FUNCTION
1
Vo
2
Trim
3
GND
A
SEQ
4
VIN
5
On/Off
Through-Hole Pad Layout – Back view
LINEAGE POWER
18
Austin MicroLynxTM II SIP 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
Output
Voltage
Output
Current
Efficiency
3.3V@ 6A
Connector
Type
Comcodes
ATH006A0X
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
SIP
108989018
CC109104717
ATH006A0XZ
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
SIP
ATH006A0X4
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
SIP
108989026
ATH006A0X4Z
2.4 – 5.5Vdc
0.75 – 3.63Vdc
6A
96.0%
SIP
CC109104725
-Z refers to RoHS-compliant versions.
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
19
Document No: DS04-024 ver. 1.22
PDF name: microlynx_II_sip_ds.pdf
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