CC109104881/AXH005A0XZ - GE CRITICAL POWER

Data Sheet

July 2, 2010

Austin Microlynx

SIP Non-isolated Power Modules:

3Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A Output Current

UL is a registered trademark of Underwriters Laboratories, Inc.

†

CSA is a registered trademark of Canadian Standards Association.

‡

VDE is a trademark of Verband Deutscher Elektrotechniker e.V.

** ISO is a registered trademark of the International Organization of Standards

Document No: DS03-083 ver. 1.35

Features

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

versions)

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

lead solder exemption (non-Z versions)

 Delivers up to 5A output current

 High efficiency – 94% at 3.3V full load (V

= 5.0V)

 Small size and low profile:

22.9 mm x 10.2 mm x 6.66 mm

(0.9 in x 0.4 in x 0.262 in)

 Low output ripple and noise

 High Reliability:

Calculated MTBF = 19M hours at 25

C Full-load

 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

†

C22.2 No. 60950-1-

03 Certified, and VDE

‡

0805:2001-12 (EN60950-1)

Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

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

Description

Austin MicroLynx

SIP (single in-line package) power modules are non-isolated dc-dc converters that can deliver

up to 5A of output current with full load efficiency of 94% at 3.63V output. These modules provide precisely

regulated output voltage programmable via external resistor from 0.75Vdc to 3.63Vdc over a wide range of input

voltage (V

= 3.0 – 5.5V). Their open-frame construction and small footprint enable designers to develop cost- and

space-efficient solutions. Standard features include remote On/Off, programmable output voltage and overcurrent

protection.

RoHS Compliant

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

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Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are

absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in

excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for

extended periods can adversely affect the device reliability.

Parameter Device Symbol Min Max Unit

Input Voltage All VIN -0.3 5.8 Vdc

Continuous

Operating Ambient Temperature All TA -40 85 °C

(see Thermal Considerations section)

Storage Temperature All Tstg -55 125 °C

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature

conditions.

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage All VIN 3.0 - 5.5 Vdc

Maximum Input Current All IIN,max 5.0 Adc

(VIN= VIN, min to VIN, max, IO=IO, max )

Input No Load Current VO,set = 0.75 Vdc IIN,No load 20 mA

(VIN = VIN, nom, Io = 0, module enabled) VO,set = 3.3Vdc IIN,No load 45 mA

Input Stand-by Current All IIN,stand-by 0.6 mA

(VIN = VIN, nom, module disabled)

Inrush Transient All I2t 0.04 A2s

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 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 fast-

acting 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.

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

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Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point All VO, set -2.0 VO, set +2.0 % VO, set

(VIN=IN, min, IO=IO, max, TA=25°C)

Output Voltage All VO, set -3% ⎯ +3.% % VO, set

(Over all operating input voltage, resistive load,

and temperature conditions until end of life)

Adjustment Range All VO 0.7525 3.63 Vdc

Selected by an external resistor

Output Regulation

Line (VIN=VIN, min to VIN, max) All

⎯ 0.3 ⎯ % VO, set

Load (IO=IO, min to IO, max) All

⎯ 0.4 ⎯ % VO, set

Temperature (Tref=TA, min to TA, max) All

⎯ 0.4 ⎯ % VO, set

Output Ripple and Noise on nominal output

(VIN=VIN, nom and IO=IO, min to IO, max

Cout = 1μF ceramic//10μFtantalum capacitors)

RMS (5Hz to 20MHz bandwidth) All ⎯ 10 15 mVrms

Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 40 50 mVpk-pk

External Capacitance

ESR ≥ 1 mΩ All CO, max ⎯ ⎯ 1000 μF

ESR ≥ 10 mΩ All CO, max ⎯ ⎯ 3000 μF

Output Current All Io 0 5 Adc

Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 220 ⎯ % Io

(VO= 90% of VO, set)

Output Short-Circuit Current All IO, s/c ⎯ 2 ⎯ Adc

(VO≤250mV) ( Hiccup Mode )

Efficiency VO,set = 0.75Vdc η 79.0 %

VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 85.0 %

IO=IO, max , VO= VO,set V

O,set = 1.5Vdc η 87.0 %

O,set = 1.8Vdc η 88.5 %

O,set = 2.5Vdc η 92.0 %

O,set = 3.3Vdc η 94.0 %

Switching Frequency All fsw ⎯ 300 ⎯ kHz

Dynamic Load Response

(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 130 ⎯ mV

Load Change from Io= 50% to 100% of

Io,max; 1μF ceramic// 10 μF tantalum

Peak Deviation

Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs

(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 130 ⎯ mV

Load Change from Io= 100% to 50%of Io,max:

1μF ceramic// 10 μF tantalum

Peak Deviation

Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

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Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Dynamic Load Response

(dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C) All Vpk ⎯ 50 ⎯ mV

Load Change from Io= 50% to 100% of Io,max;

Co = 2x150 μF polymer capacitors

Peak Deviation

Settling Time (Vo<10% peak deviation) All ts ⎯ 50 ⎯ μs

(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 50 ⎯ mV

Load Change from Io= 100% to 50%of Io,max:

Co = 2x150 μF polymer capacitors

Peak Deviation

Settling Time (Vo<10% peak deviation) All ts ⎯ 50 ⎯ μs

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO=IO, max, TA=25°C) 19,000,000 Hours

Weight ⎯ 2.8 (0.1) ⎯ g (oz.)

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

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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

Remote On/Off Signal interface

(VIN=VIN, min to VIN, max; Open collector pnp or equivalent

Compatible, Von/off signal referenced to GND

See feature description section)

Logic Low (On/Off Voltage pin open - Module ON)

Von/Off All VIL ― ― 0.4 V

Ion/Off All IIL ― ― 10 μA

Logic High (Von/Off > 2.5V – Module Off)

Von/Off All VIH ― ― V

IN, max V

Ion/off All IIH ― ― 1 mA

Turn-On Delay and Rise Times

(IO=IO, max , VIN = VIN, nom, TA = 25 oC, )

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

ON) and then input power is applied (delay from

instant at which VIN =VIN, min until Vo=10% of Vo,set)

All Tdelay ― 3.9 ― msec

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

and then the On/Off input is set to logic Low (delay from

instant at which Von/Off=0.3V until Vo=10% of Vo, set)

All Tdelay ― 3.9 ― msec

Output voltage Rise time (time for Vo to rise from 10%

of Vo,set to 90% of Vo, set)

All Trise ― 4.2 8.5 msec

Output voltage overshoot – Startup ― 1 % VO, set

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

Overtemperature Protection All Tref ⎯ 150 ⎯ °C

(See Thermal Consideration section)

Input Undervoltage Lockout

Turn-on Threshold All 2.2 V

Turn-off Threshold All 2.0 V

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

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Characteristic Curves

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

EFFICIENCY, η (%)

0 123 45

Vin = 5.5V

Vin = 5.0V

Vin = 3.0V

EFFICIENCY, η (%)

0 12 345

Vin = 5.5V

Vin = 5.0V

Vin = 3.0V

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

Figure 1. Converter Efficiency versus Output Current

(Vout = 0.75Vdc).

Figure 4. Converter Efficiency versus Output Current

(Vout = 1.8Vdc).

EFFICIENCY, η (%)

0 12345

Vin = 5.5V

Vin = 5.0V

Vin = 3.0V

EFFICIENCY, η (%)

10 0

012345

Vin = 5.5V

Vin = 5.0V

Vin = 3.0V

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

Figure 2. Converter Efficiency versus Output Current

(Vout = 1.2Vdc).

Figure 5. Converter Efficiency versus Output Current

(Vout = 2.5Vdc).

EFFICIENCY, η (%)

0 123 45

Vin = 5.5V

Vin = 5.0V

Vin = 3.0V

EFFICIENCY, η (%)

10 0

0 12345

Vin = 5.5V

Vin = 5.0V

Vin = 4.5V

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

Figure 3. Converter Efficiency versus Output Current

(Vout = 1.5Vdc).

Figure 6. Converter Efficiency versus Output Current

(Vout = 3.3Vdc).

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 7

Characteristic Curves (continued)

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

INPUT CURRENT, IIN (A)

0.5 1.5 2.5 3 .5 4 .5 5.5

Io =0A

Io =5A

Io =2.5A

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (2A/div) VO (V) (100mV/div)

INPUT VOLTAGE, VIN

(

)

TIME

(

s/div

)

Figure 7. Input voltage vs. Input Current

(Vout = 2.5Vdc).

Figure 10. Transient Response to Dynamic Load

Change from 50% to 100% of full load (Vo = 3.3Vdc).

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (2A/div) VO (V) (100mV/div)

TIME, t (2μs/div) TIME, t (5 μs/div)

Figure 8. Typical Output Ripple and Noise

(Vin = 5V dc, Vo = 0.75 Vdc, Io=5A).

Figure 11. Transient Response to Dynamic Load

Change from 100% to 50% of full load (Vo = 3.3 Vdc).

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (2A/div) VO (V) (50mV/div)

TIME, t (2μs/div) TIME, t (10μs/div)

Figure 9. Typical Output Ripple and Noise

(Vin = 5V dc, Vo = 3.3 Vdc, Io=5A).

Figure 12. Transient Response to Dynamic Load

Change from 50% to 100% of full load (Vo = 3.3 Vdc,

Cext = 2x150 μF Polymer Capacitors).

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 8

Characteristic Curves (continued)

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

OUTPUT CURRENT OUTPUTVOLTAGE

IO (A) (2A/div) VO (V) (50mV/div)

OUTPUT VOLTAGE, INPUT VOLTAGE

Vo (V) (1V/div) VIN (V) (2V/div)

TIME, t (10μs/div) TIME, t (2 ms/div)

Figure 13. Transient Response to Dynamic Load

Change from 100% of 50% full load (Vo = 3.3 Vdc, Cext

= 2x150

F Pol

mer Ca

acitors

)

Figure 16. Typical Start-Up with application of Vin with

(Vin = 5.0Vdc, Vo = 3.3Vdc, Io = 5A).

OUTPUT VOLTAGE On/Off VOLTAGE

VOV) (1V/div) VOn/off (V) (52V/div)

OUTPUT VOLTAGE On/Off VOLTAGE

VOV) (1V/div) VOn/off (V) (2V/div)

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

Figure 14. Typical Start-Up Using Remote On/Off

(Vin = 5Vdc, Vo = 3.3Vdc, Io = 5.0A).

Figure 17 Typical Start-Up using Remote On/off with

Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0

Vdc).

OUTPUT VOLTAGE On/Off VOLTAGE

VOV) (1V/div) VOn/off (V) (2V/div)

OUTPUT CURRENT,

IO (A) (5A/div)

TIME, t (2 ms/div) TIME, t (20ms/div)

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

Low-ESR external capacitors (7x150uF Polymer) (Vin

= 5Vdc, Vo = 3.3Vdc, Io = 5.0A, Co = 1050μF).

Figure 18. Output short circuit Current (Vin = 5Vdc,

Vo = 0.75Vdc).

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 9

Characteristic Curves (continued)

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

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

0 .5m/ s ( 10 0 LFM )

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

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

1.0m/s (200 LFM )

0 .5m/ s (10 0 LFM )

AMBIENT TEMPERATURE, TA

C AMBIENT TEMPERATURE, TA

Figure 19. Derating Output Current versus Local

Ambient Temperature and Airflow (Vin = 5.0Vdc,

Vo=3.3Vdc).

Figure 22. Derating Output Current versus Local

Ambient Temperature and Airflow (Vin = 3.3Vdc,

Vo=0.75 Vdc).

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

1.0m/s (200 LFM)

0 .5m/ s ( 10 0 LFM )

AMBIENT TEMPERATURE, TA

Figure 20. Derating Output Current versus Local

Ambient Temperature and Airflow (Vin = 5.0Vdc,

Vo=0.75 Vdc).

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

1.0m/s (200 LFM)

0.5m/s (100 LFM)

AMBIENT TEMPERATURE, T

Figure 21. Derating Output Current versus Local

Ambient Temperature and Airflow (Vin = 3.3Vdc,

Vo=2.5 Vdc).

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 10

Test Configurations

TO OSCILLOSCOPE CURRENT PROBE

LTEST

1μH

BATTERY

CS 1000μF

Electrolytic

E.S.R.<0.1Ω

@ 20°C 100kHz

2x100μF

Tantalum

VIN(+)

COM

NOTE: Measure input reflected ripple current with a simulated

source inductance (LTEST) of 1μH. Capacitor CS offsets

possible battery impedance. Measure current as shown

above.

CIN

Figure 23. Input Reflected Ripple Current Test Setup.

NOTE: All voltage measurements to be taken at the module

terminals, as shown above. If sockets are used then

Kelvin connections are required at the module terminals

to avoid measurement errors due to socket contact

resistance.

O (+)

COM

1uF .

RESISTIVE

LOAD

SCOPE

COPPER STRIP

GROUND PLANE

10uF

Figure 24. Output Ripple and Noise Test Setup.

COM

VIN(+)

COM

RLOAD

Rcontac t Rdistribution

Rcontact

Rdistribution

VIN VO

NOTE: All voltage measurements to be taken at the module

terminals, as shown above. If sockets are used then

Kelvin connections are required at the module terminals

to avoid measurement errors due to socket contact

resistance.

Figure 25. Output Voltage and Efficiency Test Setup.

η =

VO. IO

VIN. IIN

x 100 %

Efficiency

Design Considerations

Input Filtering

The Austin MicroLynxTM 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.

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)

10 0

12 0

01234

Vin = 3.3V

V in = 5.0 V

Output Voltage (Vdc)

Figure 26. Input ripple voltage for various output

with 1x150 µF polymer and 1x47 µF ceramic

capacitors at the input (full load)

Input Ripple Voltage (mVp-p)

10 0

12 0

01234

Vin = 3.3V

V i n = 5.0 V

Output Voltage (Vdc)

Figure 27. Input ripple voltage for various output

with 2x150 µF polymer and 2x47 µF ceramic

capacitors at the input (full load)

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 11

Design Considerations (continued)

Output Filtering

The Austin MicroLynxTM SIP module is designed for low

output ripple voltage and will meet the maximum output

ripple specification with 1 µF ceramic and 10 µF polymer

capacitors at the output of the module. However,

additional output filtering may be required by the system

designer for a number of reasons. First, there may be a

need to further reduce the output ripple and noise of the

module. Second, the dynamic response characteristics

may need to be customized to a particular load step

change.

To reduce the output ripple and improve the dynamic

response to a step load change, additional capacitance at

the output can be used. Low ESR polymer and ceramic

capacitors are recommended to improve the dynamic

response of the module. For stable operation of the

module, limit the capacitance to less than the maximum

output capacitance as specified in the electrical

specification table.

Safety Considerations

For safety agency approval the power module must be

installed in compliance with the spacing and separation

requirements of the end-use safety agency standards,

i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE

0850:2001-12 (EN60950-1) Licensed.

For the converter output to be considered meeting the

requirements of safety extra-low voltage (SELV), the

input must meet SELV requirements. The power module

has extra-low voltage (ELV) outputs when all inputs are

ELV.

The input to these units is to be provided with a fast-

acting fuse with a maximum rating of 6A in the positive

input lead.

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 12

Feature Description

Remote On/Off

The Austin MicroLynxTM SIP power modules feature an

On/Off pin for remote On/Off operation of the module. If

not using the remote On/Off pin, leave the pin open

(module will be On). The On/Off pin signal (Von/Off) is

referenced to ground. To switch module on and off using

remote On/Off, connect an open collector pnp transistor

between the On/Off pin and the VIN pin (See Figure 28).

When the transistor Q1 is in the OFF state, the power

module is ON (Logic Low on the On/Off pin of the

module) and the maximum Von/off of the module is 0.4 V.

The maximum allowable leakage current of the transistor

when Von/off = 0.4V and VIN = VIN,max is 10μA. During a

logic-high when the transistor is in the active state, the

power module is OFF. During this state VOn/Off =10 -

14V and the maximum IOn/Off = 1mA.

VIN(+)

GND

Enable

20k

On/Off

Css

IOn/Off

Lynx-series Module

Figure 28. Remote On/Off Implementation

Remote On/Off can also be implemented using open-

collector logic devices with an external pull-up resistor.

Figure 28a shows the circuit configuration using this

approach. Pull-up resistor, Rpull-up, for the configuration

should be 5k (+/-5%) for proper operation of the module

over the entire temperature range.

Figure 28a. Remote On/Off Implementation using

logic-level devices and an external pull-up resistor

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 Tref2, (see Figure 31) exceeds

150oC (typical), but the thermal shutdown is not intended

as a guarantee that the unit will survive temperatures

beyond its rating. The module will automatically restarts

after it cools down.

Q2 CSS

GND

PWM Enable

ON/OFF

VIN+

ON/OFF

MODULE

pull-up

ON/OFF

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 13

Feature Descriptions (continued)

Output Voltage Programming

The output voltage of the Austin MicroLynxTM can be

programmed to any voltage from 0.75Vdc to 3.63Vdc by

connecting a resistor (shown as Rtrim in Figure 29)

between Trim and GND pins of the module. Without an

external resistor between Trim and GND pins, the output

of the module will be 0.7525Vdc. To calculate the value

of the trim resistor, Rtrim for a desired output voltage, use

the following equation:











−

−

=5110

7525.0

21070

Rtrim

Rtrim is the external resistor in Ω

Vo is the desired output voltage

For example, to program the output voltage of the Austin

MicroLynxTM module to 1.8V, Rtrim is calculated as

follows:











−

−

=5110

7525.08.1

21070

Rtrim

Ω= kRtrim 024.9

(+)

TRIM

GND

trim

LOAD

(+)

ON/OFF

Figure 29. Circuit configuration to program output

voltage using an external resistor

Austin MicroLynxTM can also be programmed by applying

a voltage between TRIM and GND pins (Figure 30). The

following equation can be used to determine the value of

Vtrim needed to obtain a desired output voltage Vo:

{}()

7525.01698.07.0 −×−= VoVtrim

For example, to program the output voltage of a

MicroLynxTM module to 3.3 Vdc, Vtrim is calculated as

follows:

{}

)7525.03.31698.07.0( −×−=Vtrim

VVtrim 2670.0=

VO(+)

TRIM

GND

trim

LOAD

VIN(+)

ON/OFF

Figure 30. Circuit Configuration for programming

Output voltage using external voltage source

Table 1 provides Rtrim values for most common

output voltages. Table 2 provides values of

external voltage source, Vtrim for various 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

Table 2

VO, set (V) Vtrim (V)

0.7525 Open

1.2 0.6240

1.5 0.5731

1.8 0.5221

2.5 0.4033

3.3 0.2670

Using 1% tolerance trim resistor, set point tolerance of

±2% is achieved as specified in the electrical

specification. The POL Programming Tool, available at

www.lineagepower.com under the Design Tools section,

helps determine the required external trim resistor

needed for a specific output voltage.

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 14

Feature Descriptions (continued)

The amount of power delivered by the module is

defined as the voltage at the output terminals multiplied

by the output current. When using the trim feature, the

output voltage of the module can be increased, which

at the same output current would increase the power

output of the module. Care should be taken to ensure

that the maximum output power of the module remains

at or below the maximum rated power (Pmax = Vo,set x

Io,max).

Voltage Margining

Output voltage margining can be implemented in the

Austin MicroLynxTM modules by connecting a resistor,

Rmargin-up, from Trim pin to ground pin for margining-up

the output voltage and by connecting a resistor, Rmargin-

down, from Trim pin to Output pin. 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

Figure 31. Circuit Configuration for margining

Output voltage.

Austin Lynx or

Lynx II Series

GND

Trim

Rtrim

Rmargin-up

Rmargin-down

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 15

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

Tref2

Top View

Bottom View

Tref1 (inductor winding)

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

not exceed 125oC. The output power of the module

should not exceed the rated power of the module (Vo,set

x Io,max).

Please refer to the Application Note “Thermal

Characterization Process For Open-Frame Board-

Mounted Power Modules” for a detailed discussion of

thermal aspects including maximum device temperatures.

Figure 33. Thermal Test Set-up.

Heat Transfer via Convection

Increased airflow over the module enhances the heat

transfer via convection. Thermal derating curves showing

the maximum output current that can be delivered 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.

Layout Considerations

Copper paths must not be routed beneath the power

module. For additional layout guide-lines, refer to

FLTR100V10 application note.

flow

Power Module

ind Tunnel

PWBs

7.24_

(0.285)

76.2_

(3.0)

Probe Location

for measuring

airflow and

ambient

temperature

25.4_

(1.0)

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 16

Post solder Cleaning and Drying

Considerations

Post solder cleaning is usually the final circuit-board

assembly process prior to electrical board testing. The

result of inadequate cleaning and drying can affect both

the reliability of a power module and the testability of the

finished circuit-board assembly. For guidance on

appropriate soldering, cleaning and drying procedures,

refer to Board Mounted Pow er Modules : Sold erin g and

Cleaning Application Note.

Through-Hole Lead-Free Soldering

Information

The RoHS-compliant through-hole products use the SAC

(Sn/Ag/Cu) Pb-free solder and RoHS-compliant

components. They are designed to be processed

through single or dual wave soldering machines. The

pins have an RoHS-compliant finish that is compatible

with both Pb and Pb-free wave soldering processes. A

maximum preheat rate of 3°C/s is suggested. The wave

preheat process should be such that the temperature of

the power module board is kept below 210°C. For Pb

solder, the recommended pot temperature is 260°C, while

the Pb-free solder pot is 270°C max. Not all RoHS-

compliant through-hole products can be processed with

paste-through-hole Pb or Pb-free reflow process. If

additional information is needed, please consult with your

Lineage Power technical representative for more details.

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 17

Document No: DS03-083 ver. 1.35

PDF name: microlynx_sip_3v-5.5v.pdf

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.)

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 18

Recommended Pad Layout

Dimensions are in millimeters and (inches).

Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]

x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)

Data Sheet

July 2, 2010

Austin MicroLynxTM SIP Non-isolated Power Modules:

3 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 5A output current

LINEAGE POWER 19

Document No: DS03-083 ver. 1.35

PDF name: microlynx_sip_3v-5.5v.pdf

Ordering Information

Please contact your Lineage Power Sales Representative for pricing, availability and optional features.

Table 3. Device Codes

Device Code Input

Voltage Range

Output

Voltage

Output

Current

Efficiency

3.3V@ 5A

On/Off

Logic

Connector

Type Comcodes

AXH005A0XZ 3.0 – 5.5Vdc 0.75 – 3.63Vdc 5 A 94.0% Negative SIP CC109104881

AXH005A0X 3.0 – 5.5Vdc 0.75 – 3.63Vdc 5 A 94.0% Negative SIP 108979675

-Z refers to RoHS compliant Versions

World Wide Headquarters

Lineage Power Corporation

601 Shiloh Road, Plano, TX 75074, USA

+1-800-526-7819

(Outside U.S.A.: +1-972-244-9428)

www.lineagepower.com

e-mail: techsupport1@lineagepower.com

Asia-Pacific Headquarters

Tel: +65 6593 7211

Europe, Middle-East and Africa Headquarters

Tel: +49 898 780 672 80

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 assume d as a result of their use or

pplication. No right s under any patent accompany the sale of a ny such product(s) or informa tion.

Lineage Power DC-DC products are protected und er various patents. Information on these pate nts is available at www.lineagepower.com/patents.

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e Power Cor

oration

(

Plano

Te xas

)

All Int erna tion al Ri

hts Reserved.