GE Industrial Solutions Austin Microlynx II SMT User Manual

Data Sheet
September 10, 2013

Austin Microlynx

2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A Output Current

TM

II SMT Non-isolated Power Modules:

RoHS Compliant

EZ-SEQUENCETM

Applications

 Distributed power architectures

 Intermediate bus voltage applications

 Telecommunications equipment

 Servers and storage applications

 Networking equipment

 Enterprise Networks

 Latest generation IC’s (DSP, FPGA, ASIC) and

Microprocessor powered applications

Features

 Compliant to RoHS EU Directive 2002/95/EC (-Z

versions)

 Compliant to ROHS EU Directive 2002/95/EC with

lead solder exemption (non-Z versions)

 Flexible output voltage sequencing EZ-

SEQUENCE

 Delivers up to 6A output current

 High efficiency – 96% at 3.3V full load (V

 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)

 Low output ripple and noise

 High Reliability:

Calculated MTBF = 12.8M hours at 25

 Output voltage programmable from 0.75 Vdc to

3.63Vdc via external resistor

 Line Regulation: 0.3% (typical)

 Load Regulation: 0.4% (typical)

 Temperature Regulation: 0.4 % (typical)

 Remote On/Off

 Output overcurrent protection (non-latching)

 Wide operating temperature range (-40°C to 85°C)

 UL* 60950-1Recognized, CSA

60950-1-03 Certified, and VDE
(EN60950-1) Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

TM

†

C22.2 No.

‡

0805:2001-12

= 5.0V)

IN

o

C Full-load

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
range of input voltage (V
enable designers to implement various types of output voltage sequencing when powering multiple modules on
board.

* 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 Orga nization of Standards

= 2.4 – 5.5Vdc). Austin MicroLynxTM II has a sequencing feature, EZ-SEQUENCETM that

IN

Document No: DS03-107 ver. 1.04

PDF name:

microlynx_II_smt_ds.pdf

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II 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

IN

Sequencing voltage All Vseq -0.3 V

Operating Ambient Temperature All T

A

-0.3 5.8 Vdc

Vdc

IN,max

-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 Vo,set ≤ 3.63 VIN 2.4

Maximum Input Current All I

(VIN= V

Input No Load Current V

IN, min

to V

IN, max

, IO=I

)

O, max

= 0.75 Vdc I

O,set

IN,max

IN,No load

6.0 Adc

20 mA

⎯

5.5 Vdc

(VIN = V

Input Stand-by Current All I

(VIN = V

, Io = 0, module enabled) V

IN, nom

, module disabled)

IN, nom

= 3.3Vdc I

O,set

IN,No load

IN,stand-by

45 mA

0.6 mA

Inrush Transient All I2t 0.04 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 35 mAp-p

Input Ripple Rejection (120Hz) All 30 dB

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a 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
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point All V

(VIN=

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 81.2 %

O, set

= 1.2Vdc η 86.8 %

O, set

= 1.5Vdc η 88.8 %

O,set

= 1.8Vdc η 89.7 %

O,set

= 2.5Vdc η 92.5 %

O,set

= 3.3Vdc η 95.4 %

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

–3.0

⎯

⎯

+2.0 % V

+3.0 % V

0.7525 3.63 Vdc

⎯

⎯

⎯

⎯

0.3

0.4

⎯

⎯

⎯

10 15 mV

40 50 mV

% V

% V

% V

⎯ ⎯

⎯ ⎯

1000 μF

5000 μF

0 6 Adc

⎯

⎯

220

2

⎯

⎯

⎯

⎯

⎯

⎯

⎯

300

130

25

130

25

⎯

⎯

⎯ μs

⎯

⎯ μs

pk-pk

% I

Adc

kHz

mV

mV

O, set

O, set

O, set

O, set

O, set

rms

o

LINEAGE POWER 3

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II 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

⎯

⎯

⎯

⎯

50

50

50

50

⎯

⎯ μs

⎯

⎯ μs

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO=I

Weight

, TA=25°C) 12,841,800 Hours

O, max

⎯

2.8 (0.1)

⎯

g (oz.)

mV

mV

LINEAGE POWER 4

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II 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

Device code with Suffix “4” – Positive logic

(On/Off is open collector/drain logic input;

Signal referenced to GND - See feature description section)

Input High Voltage (Module ON) All VIH ― ― V

Input High Current All IIH ― ― 10 μA

Input Low Voltage (Module OFF) All VIL -0.2 ― 0.3 V

Input Low Current All IIL ― 0.2 1 mA

Device Code with no suffix – Negative Logic

(On/OFF pin is open collector/drain logic input with

external pull-up resistor; signal referenced to GND)

Input High Voltage (Module OFF) All VIH 1.5 ― V

Input High Current All IIH 0.2 1 mA

Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 Vdc

Input low Current All IIL ― 10 μA

Turn-On Delay and Rise Times

(IO=I

Case 1: On/Off input is set to Logic Low (Module

O, max , VIN

= V

= 25 oC, )

IN, nom, TA

All Tdelay ― 3.9 ― msec
ON) and then input power is applied (delay from
instant at which V

Case 2: Input power is applied for at least one second

=V

IN

until Vo=10% of Vo,set)

IN, min

All Tdelay ― 3.9 ― msec
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 V

o,set to 90% of Vo, set)

All Trise

Output voltage overshoot – Startup ―

IO= I

; VIN = 3.0 to 5.5Vdc, TA = 25 oC

O, max

Sequencing Delay time

Delay from V

to application of voltage on SEQ pin All TsEQ-delay 10 msec

IN, min

Tracking Accuracy (Power-Up: 2V/ms) All

(Power-Down: 1V/ms) All

(V

IN, min

to V

IN, max

; I

to I

O, min

VSEQ < Vo)

O, max

Overtemperature Protection

(See Thermal Considerations section)

Input Undervoltage Lockout

SEQ –Vo |

|V

SEQ –Vo |

|V

All T

ref

Turn-on Threshold All 2.2 V

Turn-off Threshold All

IN, max

IN,max

― 4.2 8.5 msec

1

100 200 mV

200 400 mV

150

⎯

⎯

2.0 V

V

Vdc

% V

O, set

°C

LINEAGE POWER 5

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves

The following figures provide typical characteristics for the Austin MicroLynxTM II SMT modules at 25ºC.

91

88

85

82

79

76

73

EFFICIENCY, η (%)

70

0 123456

VIN=2.4V

VIN=5V

VIN=5.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).

94

91

88

85

82

79

76

73

EFFICIENCY, η (%)

70

0 123456

VIN=2.4V

VIN=5V

VIN=5.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).

98

95

92

89

86

83

80

EFFICIENCY, η (%)

77

74

0 123456

Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).

98

95

92

89

86

83

80

77

EFFICIENCY, η (%)

74

0 123456

Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).

VIN=2.4V

VIN=5V

VIN=5.5V

VIN=3 V

VIN=5V

VIN=5.5 V

94

91

88

85

82

79

76

73

EFFICIENCY, η (%)

70

0 123456

VIN=2.4V

VIN=5V

VIN=5.5V

98

95

92

89

86

83

80

EFFICIENCY, η (%)

77

74

0 123456

VIN=4 .5V

VIN=5V

VIN=5.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Figure3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).

Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).

LINEAGE POWER 6

Data Sheet

(V)

September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves (continued)

The following figures provide typical characteristics for the MicroLynxTM II SMT modules at 25ºC.

7

6

(A)

5

IN

4

3

2

1

INPUT CURRENT, I

0

1 1.75 2.5 3.25 4 4.75 5.5

Figure 7. Input voltage vs. Input Current

INPUT VOLTAGE, V

IN

(Vout =2.5Vdc).

Io =6 A

Io =3 A

Io =0 A

(V) (100mV/div)

O

(A) (2A/div) V

O

OUTPUT CURRENT, OUTPUT VOLTAGE

I

TIME, t (5 μs/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 (5 μs/div)

Figure 8. Typical Output Ripple and Noise

(Vin = 5.0V dc, Vo = 0.75 Vdc, Io=6A).

(V) (20mV/div)

O

OUTPUT VOLTAGE

V

TIME, t (2μs/div) TIME, t (10μs/div)

Figure 9. Typical Output Ripple and Noise

(Vin = 5.0V dc, Vo = 3.3 Vdc, Io=6A).

(V) (100mV/div)

O

(A) (2A/div) V

O

OUTPUT CURRENT, OUTPUT VOLTAGE

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) (2A/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

Data Sheet

μ

September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves (continued)

The following figures provide typical characteristics for the Austin MicroLynxTM II SMT modules at 25ºC.

(V) (2V/div)

(V) (50mV/div)

O

(A) (2A/div) V

O

OUTPUT CURRENT, OUTPUTVOLTAGE

I

TIME, t (10μs/div)

Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 3.3Vdc, Cext
= 2x150

F Polymer Capacitors).

IN

(V) (1V/div) V

o

V

OUTPUT VOLTAGE, INPUT VOLTAGE

TIME, t (2 ms/div)

Figure 16. Typical Start-Up with application of Vin

(Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 6A).

(V) (2V/div)

On/off

V) (1V/div) V

O

V

OUTPUT VOLTAGE On/Off VOLTAGE

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 = 6A).

(V) (2V/div)

On/off

V) (1V/div) V

O

V

OUTPUT VOLTAGE On/Off VOLTAGE

F

igure 15. Typical Start-Up Using Remote On/Off with

TIME, t (2 ms/div) TIME, t (5ms/div)

Low-ESR external capacitors (7x150uF Polymer) (Vin
= 5.0Vdc, Vo = 3.3Vdc, Io = 6A, Co = 1050μF).

(V) (2V/div)

On/off

V) (1V/div) V

O

V

OUTPUT VOLTAGE On/Off VOLTAGE

Figure 17 Typical Start-Up Using Remote On/Off with
Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias
=1.0Vdc).

(A) (5A/div)

O

OUTPUT CURRENT,

I

Figure 18. Output short circuit Current

(Vin = 5.0Vdc, Vo = 0.75Vdc).

LINEAGE POWER 8

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves (continued)

The following figures provide thermal derating curves for the Austin MicroLynxTM II SMT modules.

7.5

6.0

4.5

3.0

1. 5

0.0

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

NC

0.5m/ s (100 LFM)

1.0m/s (200 LFM)

AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC

Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0,
Vo=3.3Vdc).

OUTPUT CURRENT, Io (A)

7.5

6.0

4.5

3.0

1. 5

0.0
20 30 40 50 60 70 80 90

NC

0 .5m/s ( 100 LFM )

1. 0 m/ s ( 2 0 0 LF M )

AMBIENT TEMPERATURE, TA OC

Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=0.75 Vdc).

7.5

8

6

5

NC

3

0.5m/ s (100 LFM)

2

1.0m/s (200 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 = 3.3dc,
Vo=0.75 Vdc).

6.0

4.5

3.0

1. 5

0.0

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

NC

0.5m/s (100 LFM)

1.0m/s (200 LFM )

AMBIENT TEMPERATURE, TA OC

Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow

(Vin = 3.3Vdc,

Vo=2.5 Vdc).

LINEAGE POWER 9

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II 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 23. 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

SCOPE

GROUND PLANE

Figure 24. 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 sock ets 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 25. Output Voltage and Efficiency Test Setup.

. I

V

O

Efficiency

=

η

VIN. I

O

IN

V

COM

2x100μF
Tantalum

O

CURRENT PROBE

CIN

RESISTIVE
LOAD

R

V

O

R

x 100 %

VIN(+)

COM

contactRdistribution

R

contactRdistribution

LOAD

Design Considerations

Input Filtering

The Austin MicroLynxTM 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.

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.

12 0

10 0

80

60

40

Vin = 3.3V

20

Vin = 5.0V

0

Input Ripple Voltage (mVp-p)

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).

Input Ripple Voltage (mVp-p)

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).

01234

12 0

10 0

80

60

40

Vin = 3.3V

20

V in = 5.0V

0

01234

LINEAGE POWER 10

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Design Considerations (continued)

Output Filtering

The Austin MicroLynxTM 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.

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 6A in the positive
input lead

.

LINEAGE POWER 11

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Feature Description

Remote On/Off

The Austin LynxTM II SMT power modules feature an
On/Off pin for remote On/Off operation. Two On/Off logic
options are available in the Austin Lynx
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 = V

is 10µA. Applying a logic-low

IN,max

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 V

IN.

VIN+

ON/OFF

R1

I

ON/OFF

GND

+

V

ON/OFF

Q1

_

Figure 28. Circuit configuration for using positive
logic On/OFF.

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 R
= 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.

R2

R3

R4

Q2

TM

II series

MODULE

PWM Enable

Q3 CSS

pull-up

VIN+

ON/OFF

GND

R

pull-up

I

ON/OFF

V

ON/OFF

Q1

+

_

MODULE

PWM Enable

R1

Q2 CSS

R2

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.

Input Undervoltage Lockout

At input voltages below the input undervoltage lockout
limit, module operation is disabled. The module will begin
to operate at an input voltage above the undervoltage
lockout turn-on threshold.

Overtemperature Protection

To provide over temperature protection in a fault
condition, the unit relies upon the thermal protection
feature of the controller IC. The unit will shutdown if the
thermal reference point T
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.

, exceeds 150oC (typical), but

ref

LINEAGE POWER 12

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Feature Descriptions (continued)

Output Voltage Programming

The output voltage of the Austin MicroLynx
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:

Rtrim



−

7525.0

Vo



21070



= 5110

For example, to program the output voltage of the Austin
MicroLynx
follows:

TM

II module to 1.8 Vdc, Rtrim is calculated is

21070



= 5110

Rtrim



−

7525.08.1



Ω= kRtrim 004.15

V

V

(+)

IN

(+)

O

−

−

Vout

TM

II SMT can



Ω









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
Austin MicroLynx
resistor, R
for margining-up the output voltage and by connecting
a resistor, R
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 R
R

margin-down

Please consult your local Lineage Power technical
representative for additional details.

TM

II modules by connecting a

, from the Trim pin to the ground pin

margin-up

margin-down

, from the Trim pin to the Output

and

margin-up

for a specific output voltage and % margin.

Vo

Rmargin-down

Austin Lynx or
Lynx II Series

Q2

ON/OFF

GND

TRIM

R

trim

LOAD

Figure 30. Circuit configuration to program output
voltage using an external resistor.

Table 1 provides Rtrim values required for some common
output voltages.

Table 1

V

(V)

O, set

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)

Trim

Rtrim

GND

Q1

Figure 31. Circuit Configuration for margining
Output voltage.

Rmargin-up

LINEAGE POWER 13

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

Feature Descriptions (continued)

Voltage Sequencing

Austin MicroLynxTM II series of modules include a
sequencing feature, EZ-SEQUENCE
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 V
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 V

IN 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-SEQUENCE
start-up of the module, pre-bias immunity feature during
start-up is disabled. The pre-bias immunity feature of the
module relies on the module being in the diode-mode
during start-up. When using the EZ-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-SEQUENCE
must be disabled. For additional guidelines on using EZ­SEQUENCE

TM

feature of Austin MicroLynxTM II , contact
Lineage Power technical representative for preliminary
application note on output voltage sequencing using
Austin Lynx II series.

TM

that enables

TM

feature to control

IN or leave

TM

TM

feature

LINEAGE POWER 14

Data Sheet

A

W

September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

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

T

(inductor winding)

ref1

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_

ind Tunnel

PWBs

x

7.24_

(0.285)

ir

(1.0)

Power Module

76.2_

(3.0)

Probe Location
for measuring
airflow and
ambient
temperature

flow

Top View

T

ref2

Bottom View

Figure 32. T

The thermal reference point, T
specifications of thermal derating curves is shown in
Figure 32. For reliable operation this temperature should
not exceed 125

The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).

Temperature measurement location.

ref

used in the

ref 1

o

C.

Figure 33. Thermal Test Set-up.

Heat Transfer via Convection

Increased airflow over the module enhances the heat
transfer via convection. Thermal derating curves
showing the maximum output current that can be
delivered by various module versus local ambient
temperature (T
(200 ft./min) are shown in the Characteristics Curves
section.

) for natural convection and up to 1m/s

A

LINEAGE POWER 15

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

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
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

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
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

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: 330.2 mm (13.00)

Inside Dimensions: 177.8 mm (7.00”)

Width 44.0 mm (1.73”)

LINEAGE POWER 18

Data Sheet
September 10, 2013

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

Austin MicroLynx

Surface Mount Information

Pick and Place

The Austin MicroLynxTM 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.

Figure 34. 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 8 mm max.

Tin Lead Soldering

The Austin MicroLynxTM 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.

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,

wets the land, and subsequently wicks the device

TM

II SMT Non-isolated Power Modules:

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

250

200

15 0

10 0

REFLOW TEMP (°C)

50

0

Peak T emp 235oC

Heat zone

oCs-1

max 4

Soak zone
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

Figure 35. Reflow Profile for Tin/Lead (Sn/Pb)
process.

240

235

230

225

220

215

210

MAX TEMP SOLDER (°C)

205

200

0 102030405060

Figure 36. Time Limit Curve Above 205oC for
Tin/Lead (Sn/Pb) process.

LINEAGE POWER 19

Data Sheet
September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II SMT Non-isolated Power Modules:

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.

MSL Rating

The Austin MicroLynx II 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
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

Per J-STD-020 Rev. C

250

200

150

Heat ing Zone
1°C/Second

100

Reflow Temp (°C)

50

0

Peak Temp 260°C

* Min. Time Above 235°C
15 Seconds

*Time Above 217°C

60 Seconds

Reflow Time (Seconds)

Cooling
Zone

Figure 37. Recommended linear reflow profile
using Sn/Ag/Cu solder.

LINEAGE POWER 20

Data Sheet

a

©

September 10, 2013

Austin MicroLynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current

TM

II 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

ATH006A0X-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6 A 96.0% Negative SMT 108988358

ATH006A0X-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6 A 96.0% Negative SMT CC109104535

ATH006A0X4-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6 A 96.0% Positive SMT 108988366

ATH006A0X4-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 6 A 96.0% Positive SMT 108996708

Input

Voltage Range

-Z refers to RoHS compliant parts

Output

Voltage

Output

Current

Efficiency

3.3V@ 6A

On/Off

Logic

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
[phone]
(Outsi de U.S.A.: [phone])

www.lineagepower.com
e-mail: techs [e-mail]

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 various pa tents. Infor mation on these pa tents is av ailable at ww w.line agepower .com/paten ts.

2009 Line age Power Corporation, (Plan o, Texas) All Inte rnation al Rights Reserved.

Europe, Middle-East and Africa Headquarters

Tel: + 49 898 780 672 80

India Headquarters
Tel: + 91 80 2841163 3

LINEAGE POWER 21

Document No: DS03-107 ver. 1.05

PDF name:

microlynx_II_smt_ds.pdf