Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-Isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A 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: DS06-131 ver. 1.14
PDF name: APTH003A0X_ds.pdf
Features
Compliant to RoHS EU Directive 2002/95/EC
(Z versions)
Compatible in a Pb-free or SnPb reflow
environment (Z versions)
Wide Input voltage range (2.4Vdc-5.5Vdc)
Output voltage programmable from 0.6Vdc to 3.63
Vdc via external resistor
Tunable LoopTM to optimize dynamic output
voltage response
Flexible output voltage sequencing EZ-
SEQUENCE – APTH versions
Remote sense
Fixed switching frequency
Output overcurrent protection (non-latching)
Overtemperature protection
Remote On/Off
Ability to sink and source current
Cost efficient open frame design
Small size: 12.2 mm x 12.2 mm x 6.25 mm
(0.48 in x 0.48 in x 0.25 in)
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
Industrial equipment
Description
The Pico TLynxTM 3A power modules are non-isolated dc-dc converters that can deliver up to 3A of output current.
These modules operate over a wide range of input voltage (VIN = 2.4Vdc-5.5Vdc) and provide a precisely regulated
output voltage from 0.6Vdc to 3.63Vdc, programmable via an external resistor. Features include remote On/Off,
adjustable output voltage, over current and overtemperature protection, and output voltage sequencing (APTH
versions). A new feature, the Tunable LoopTM , allows the user to optimize the dynamic response of the converter
to match the load with reduced amount of output capacitance leading to savings on cost and PWB area.
TRIM
VOUT
SENSE
GND
CTUNE
RTUNE
RTrim
VIN
Co
Cin
Vin+ Vout+
ON/OFF
Q1
SEQ
MODULE
RoHS Compliant
EZ-SEQUENCETM
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 2
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 6 Vdc
Continuous
Sequencing Voltage APTH VSEQ -0.3 ViN, Max Vdc
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 2.4
⎯ 5.5 Vdc
Maximum Input Current All IIN,max 3.5 Adc
(VIN=2.4V to 5.5V, IO=IO, max )
Input No Load Current VO,set = 0.6 Vdc IIN,No load 26 mA
(VIN = 5.0Vdc, IO = 0, module enabled) VO,set = 3.3Vdc IIN,No load 75 mA
Input Stand-by Current All IIN,stand-by 2.1 mA
(VIN = 5.0Vdc, module disabled)
Inrush Transient All I2t 1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN =0 to
5.5V, IO= IOmax ; See Test Configurations)
All 25 mAp-p
Input Ripple Rejection (120Hz) All 40 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 an
integrated part of sophisticated 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 5A (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
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point (with 0.5% tolerance for
external resistor used to set output voltage) All VO, set -1.5 +1.5 % VO, set
Output Voltage All VO, set -3.0 ⎯ +3.0 % VO, set
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All VO 0.6 3.63 Vdc
Selected by an external resistor
Output Regulation (for VO ≥ 2.5Vdc)
Line (VIN=VIN, min to VIN, max) All
⎯ +0.4 % VO, set
Load (IO=IO, min to IO, max) All
⎯ 10 mV
Output Regulation (for VO < 2.5Vdc)
Line (VIN=VIN, min to VIN, max) All
⎯ 10 mV
Load (IO=IO, min to IO, max) All
⎯ 5 mV
Temperature (Tref=TA, min to TA, max) All
⎯ 0.4 % VO, set
Remote Sense Range All 0.5 V
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF //
10 μF ceramic capacitors)
Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 20 35 mVpk-pk
RMS 15 25 mVrms
External Capacitance1
Without the Tunable LoopTM
ESR ≥ 1 mΩ All CO, max 0 ⎯ 47 μF
With the Tunable LoopTM
ESR ≥ 0.15 mΩ All CO, max 0 ⎯ 1000 μF
ESR ≥ 10 mΩ All CO, max 0 ⎯ 3000 μF
Output Current All Io 0 3 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim 200 % Io,max
Output Short-Circuit Current All IO, s/c 0.12 Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO,set = 0.6Vdc η 81.2 %
VIN= 3.3Vdc, TA=25°C VO, set = 1.2Vdc η 89.4 %
IO=IO, max , VO= VO,set V
O,set = 1.8Vdc η 91.4 %
V
O,set = 2.5Vdc η 93.9 %
VIN= 5Vdc VO,set = 3.3Vdc η 94.4 %
Switching Frequency All fsw ⎯ 600 ⎯ kHz
Dynamic Load Response
(dIo/dt=10A/μs; VIN = 5V; Vout = 1.5V, TA=25°C)
Load Change from Io= 0% to 50% of Io,max;
Co = 0
Peak Deviation All Vpk 90 mV
Settling Time (Vo<10% peak deviation) All ts 20 μs
Load Change from Io= 50% to 0% of Io,max:
Co = 0
Peak Deviation All Vpk 100 mV
Settling Time (Vo<10% peak deviation) All ts 20 μs
1 External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as
getting the best transient response. See the Tunable LoopTM section for details.
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 4
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=0.8IO, max, TA=40°C) Telcordia Issue 2 Method
1 Case 3 16,139,760 Hours
Weight ⎯ 1.55 (0.0546) ⎯ g (oz.)
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 Units
On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
Signal referenced to GND)
Device is with suffix “4” – Positive Logic (See Ordering
Information)
Logic High (Module ON)
Input High Current All IIH ⎯ 10 µA
Input High Voltage All VIH 1.2 ⎯ VIN,max V
Logic Low (Module OFF)
Input Low Current All IIL ⎯ ⎯ 0.3 mA
Input Low Voltage All VIL -0.3 ⎯ 0.3 V
Device Code with no suffix – Negative Logic (See Ordering
Information)
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Logic High (Module OFF)
Input High Current All IIH ― ― 1 mA
Input High Voltage All VIH V
IN – 1.6 ― V
IN, max Vdc
Logic Low (Module ON)
Input low Current All IIL ― ― 0.2 mA
Input Low Voltage All VIL -0.2 ― V
IN – 1.6 Vdc
Turn-On Delay and Rise Times
(VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state)
Case 1: On/Off input is enabled and then input power is
applied (delay from instant at which VIN = VIN, min until Vo =
10% of Vo, set
)
All Tdelay ― 2 ― msec
Case 2: Input power is applied for at least one second and
then the On/Off input is enabled (delay from instant at
which Von/Off is enabled until Vo = 10% of Vo, set)
All Tdelay ― 2 ― msec
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set) All Trise ― 5 ― msec
Output voltage overshoot (TA = 25oC 3.0
% VO,
VIN= VIN, min to VIN, max,IO = IO, min to IO, max)
With or without maximum external capacitance
Over Temperature Protection All Tref 140 °C
(See Thermal Considerations section)
Sequencing Delay time
Delay from VIN, min to application of voltage on SEQ
pin APTH TsEQ-delay 10 msec
Tracking Accuracy (Power-Up: 2V/ms) APTH VSEQ –Vo 100 mV
(Power-Down: 2V/ms) APTH VSEQ –Vo 100 mV
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 5
Feature Specifications (cont.)
Parameter Device Symbol Min Typ Max Units
Input Undervoltage Lockout
Turn-on Threshold All 2.2 Vdc
Turn-off Threshold All 1.75 Vdc
Hysteresis All
0.08 0.2 Vdc
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 6
Characteristic Curves
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 0.6Vo and at 25oC.
EFFICIENCY, η (%)
70
72
74
76
78
80
82
84
86
00.511.522.53
Vin=5.5V
Vin=2.4V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 1. Converter Efficiency versus Output Current. Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (100mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 3. Typical output ripple and noise (VIN = 5V, Io =
Io,max).
Figure 4. Transient Response to Dynamic Load
Change from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (200mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (200mV/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io =
Io,max).
Figure 6. Typical Start-up Using Input Voltage (VIN =
5V, Io = Io,max).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 1.2Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
00.511.522.53
Vin=5.5V
Vin=2.4V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current. Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (100mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 9. Typical output ripple and noise (VIN = 5V, Io =
Io,max).
Figure 10. Transient Response to Dynamic Load
Change from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (500mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (500mV/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io =
Io,max).
Figure 12. Typical Start-up Using Input Voltage (VIN =
5V, Io = Io,max).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 1.8Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
00.511.522.53
Vin=5.5V
Vin=2.4V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUT
PUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (200mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 15. Typical output ripple and noise (VIN = 5V, Io =
Io,max).
Figure 16. Transient Response to Dynamic Load
Change from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (500mV/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (1V/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io =
Io,max).
Figure 18. Typical Start-up Using Input Voltage (VIN =
5V, Io = Io,max).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 9
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 2.5Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3
Vin=5.5V
Vin=3V
Vin=3.3V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 19. Converter Efficiency versus Output Current. Figure 20. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (200mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 21. Typical output ripple and noise (VIN = 5V, Io =
Io,max).
Figure 22. Transient Response to Dynamic Load
Change from 0% to 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (5V/div) VO (V) (1V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (1V/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io =
Io,max).
Figure 24. Typical Start-up Using Input Voltage (VIN =
5V, Io = Io,max).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 10
Characteristic Curves (continued)
The following figures provide typical characteristics for the Pico TLynxTM 3A modules at 3.3Vo and at 25oC.
EFFICIENCY, η (%)
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3
Vin=5.5V
Vin=4V
Vin=5V
OUTPUT CURRENT, Io (A)
0
0.5
1
1. 5
2
2.5
3
3.5
20 30 40 50 60 70 80 90
0 LFM
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 25. Converter Efficiency versus Output Current. Figure 26. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT
CURRENT
,
OUTPUT
VOLTAGE
IO (A) (1Adiv) VO (V) (200mV/div)
TIME, t (1μs/div) TIME, t (20μs /div)
Figure 27. Typical output ripple and noise (VIN = 5V, Io =
Io,max).
Figure 28. Transient Response to Dynamic Load
Change from 0% 50% to 0% with VIN=5V.
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (2V/div) VO (V) (1V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) (2V/div) VO (V) (1V/div)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io =
Io,max).
Figure 30. Typical Start-up Using Input Voltage (VIN =
5V, Io = Io,max).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 11
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 31. Input Reflected Ripple Current Test
Setup.
NOTE: All voltage measurements to be taken at the m odule
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.
Vo+
COM
0.1u F
RESISTIVE
LOAD
SCOPE U SING
BNC SOCK ET
COPPER STRIP
GROUND PLANE
10uF
Figure 32. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontac t Rdistribution
Rcontac t Rdistribution
Rcontact
Rcontact
Rdistribution
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 33. Output Voltage and Efficiency Test
Setup.
η =
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
The Pico TLynxTM 3A module should be connected
to a low ac-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 ceramic
capacitors are recommended at the input of the
module. Figure 34 shows the input ripple voltage for
various output voltages at 3A of load current with 1x22
µF or 2x22 µF ceramic capacitors and an input of 5V.
Figure 35 shows data for the 3.3Vin case, with 1x22µF
or 2x22µF of ceramic capacitors at the input.
Input Ripple Voltage (mVp-p)
0
10
20
30
40
50
60
0.5 1 1.5 2 2.5 3 3.5
1x22uF
2x22uF
Output Voltage (Vdc)
Figure 34. Input ripple voltage for various output
voltages with 1x22 µF or 2x22 µF ceramic
capacitors at the input (3A load). Input voltage is
5V.
Input Ripple Voltage (mVp-p)
0
10
20
30
40
50
60
0.511.522.53
1x22uF
2x22uF
Output Voltage (Vdc)
Figure 35. Input ripple voltage in mV, p-p for
various output voltages with 1x22 µF or 2x22 µF
ceramic capacitors at the input (3A load). Input
voltage is 3.3V.
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 12
Output Filtering
The Pico TLynxTM 3A modules are designed for low
output ripple voltage and will meet the maximum
output ripple specification with 0.1 µF ceramic and 10
µF ceramic 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
ceramic and polymer capacitors are recommended to
improve the dynamic response of the module. Figure
36 provides output ripple information for different
external capacitance values at various Vo and for load
currents of 3A while maintaining an input voltage of
5V. Fig 37 shows the performance with a 3.3V input.
For stable operation of the module, limit the
capacitance to less than the maximum output
capacitance as specified in the electrical specification
table. Optimal performance of the module can be
achieved by using the Tunable Loop feature described
later in this data sheet.
0
5
10
15
20
25
30
0.5 1 1.5 2 2.5 3 3.5
Output Voltage(Volts)
Ripple(mVp-p)
1x10uF External Cap
1x47uF External cap
2x47uF External Cap
4x47uF external Cap
Figure 36. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or
4x47 µF ceramic capacitors at the output (3A load).
Input voltage is 5V.
0
5
10
15
20
0.511.522.53
Output Voltage(Volts)
Ripple(mVp-p)
1x10uF External Cap
1x47uF External cap
2x47uF External Cap
4x47uF external Cap
Figure 37. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or
4x47 µF ceramic capacitors at the output (3A load).
Input voltage is 3.3V.
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 5A in the positive
input lead.
Feature Descriptions
Remote On/Off
The Pico TLynxTM 3A modules feature an On/Off pin
for remote On/Off operation. Two On/Off logic options
are available. In the Positive Logic On/Off option,
(device code suffix “4”- see Ordering Information), the
module turns ON during a logic High on the On/Off pin
and turns OFF during a logic Low. With the Negative
Logic On/Off option, (no device code suffix, see
Ordering Information), the module turns OFF during
logic High and ON during logic Low. The On/Off signal
is always referenced to ground. For either On/Off logic
option, leaving the On/Off pin disconnected will turn
the module ON when input voltage is present.
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 38. When the
external transistor Q1 is in the OFF state, Q2 is ON,
the internal PWM Enable signal is pulled low and the
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 13
module is ON. When transistor Q1 is turned ON, the
On/Off pin is pulled low, Q2 is turned off and the
internal PWM Enable signal is pulled high through the
100K internal pull-up resistor and the module is OFF.
Figure 38. Circuit configuration for using positive
On/Off logic.
For negative logic On/Off modules, the circuit
configuration is shown in Fig. 39. The On/Off pin
should be pulled high with an external pull-up resistor
(suggested value for the 2.4V to 5.5Vin range is
3.6Kohms). When transistor Q1 is in the OFF state, the
On/Off pin is pulled high and the module is OFF. The
On/Off threshold for logic High on the On/Off pin
depends on the input voltage and its minimum value is
VIN – 1.6V. To turn the module ON, Q1 is turned ON
pulling the On/Off pin low.
100K
Q1
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
Rpullup
ON/OFF
2.05K
20K
Figure 39. Circuit configuration for using negative
On/Off logic.
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.
Overtemperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit will
shutdown if the overtemperature threshold of 140oC is
exceeded at the thermal reference point Tref . The
thermal shutdown is not intended as a guarantee that
the unit will survive temperatures beyond its rating.
Once the unit goes into thermal shutdown it will then
wait to cool before attempting to restart.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, the module operation is disabled. The module
will begin to operate at an input voltage above the
undervoltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the Pico TLynxTM 3A modules
can be programmed to any voltage from 0.6Vdc to
3.63Vdc by connecting a resistor between the Trim
and GND pins of the module. Certain restrictions apply
on the output voltage set point depending on the input
voltage. These are shown in the Output Voltage vs.
Input Voltage Set Point Area plot in Fig. 40. The
Upper Limit curve shows that the entire output voltage
range is available with the maximum input voltage of
5.5V. The Lower Limit curve shows that for output
voltages of 1.8V and higher, the input voltage needs to
be larger than the minimum of 2.4V.
0
1
2
3
4
5
6
0.5 1 1.5 2 2.5 3 3.5 4
Output Voltage (V)
Input Voltage (v)
Upper Limit
Lower Limit
Figure 40. Output Voltage vs. Input Voltage Set
Point Area plot showing limits where the output
voltage can be set for different input voltages.
Without an external resistor between Trim and GND
pins, the output of the module will be 0.6Vdc. To
calculate the value of the trim resistor, Rtrim for a
desired output voltage, use the following equation:
()
Ω
−
=k
Vo
Rtrim
6.0
2.1
100K
Q1
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
I
V
MODULE
ON/OFF
20
K
Q2
20K
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 14
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
VO, set (V) Rtrim (KΩ)
0.6 Open
1.0 3.0
1.2 2.0
1.5 1.333
1.8 1.0
2.5 0.632
3.3 0.444
By using a ±0.5% tolerance trim resistor with a TC of
±25ppm, a set point tolerance of ±1.5% can be
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 trim resistor
needed for a specific output voltage.
VO+
TRIM
GND
Rtrim
LOAD
VIN+
ON/OFF
SENSE
Figure 41. Circuit configuration for programming
output voltage using an external resistor.
Remote Sense
The Pico TLynxTM 3A modules have a Remote Sense
feature to minimize the effects of distribution losses by
regulating the voltage at the SENSE pin. The voltage
between the SENSE pin and VOUT pin must not
exceed 0.5V. Note that the output voltage of the
module cannot exceed the specified maximum value.
This includes the voltage drop between the SENSE
and Vout pins. When the Remote Sense feature is not
being used, connect the SENSE pin to the VOUT pin.
Voltage Margining
Output voltage margining can be implemented in the
Pico TLynxTM 3A 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 output pin for
margining-down. Figure 42 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
MODULE
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 42. Circuit Configuration for margining
Output voltage
Monotonic Start-up and Shutdown
The Pico TLynxTM 3A modules have monotonic start-
up and shutdown behavior for any combination of
rated input voltage, output current and operating
temperature range.
Startup into Pre-biased Output
The 5.5V Pico TLynxTM 6A modules can start into a
prebiased output as long as the prebias voltage is 0.5V
less than the set output voltage. Note that prebias
operation is not supported when output voltage
sequencing is used.
Output Voltage Sequencing
The Pico TLynxTM modules include a sequencing
feature, EZ-SEQUENCE 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 final value of the
SEQ voltage must be set higher than the set-point
voltage of the module. The output voltage follows the
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 15
voltage on the SEQ pin on a one-to-one volt basis. By
connecting the SEQ pins of multiple modules together,
all modules can 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 10msec delay is
required before applying voltage on the SEQ pin. This
delay gives the module enough time to complete its
internal power-up soft-start cycle. During the delay
time, the SEQ pin should be held close to ground
(nominally 50mV ± 20 mV). This is required to keep the
internal op-amp out of saturation thus preventing
output overshoot during the start of the sequencing
ramp. By selecting resistor R1 (see fig. 43) according
to the following equation
05.0
24950
1
−
=
IN
V
Rohms,
the voltage at the sequencing pin will be 50mV when
the sequencing signal is at zero.
R1
GND
VIN+
SEQ
+
-
OUT
10K
499K
MODULE
Figure 43. Circuit showing connection of the
sequencing signal to the SEQ pin.
After the 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 the
output reaches the set-point voltage. To initiate
simultaneous shutdown of the modules, the SEQ pin
voltage is lowered in a controlled manner. The 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.
When using the EZ-SEQUENCETM feature to control
start-up of the module, pre-bias immunity 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-SEQUENCETM
feature, modules goes through an internal set-up time
of 10msec, and will be in synchronous rectification
mode when the voltage at the SEQ pin is applied. This
will result in the module sinking current if a 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 the EZ-SEQUENCETM
feature please refer to Application Note AN04-008
“Application Guidelines for Non-Isolated Converters:
Guidelines for Sequencing of Multiple Modules”, or
contact the Lineage Power technical representative for
additional information.
Tunable Loop
The 5V Pico TLynxTM 3A modules have a new feature
that optimizes transient response of the module called
Tunable LoopTM.
External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple
and noise (see Figures 36 and 37) and to reduce
output voltage deviations from the steady-state value
in the presence of dynamic load current changes.
Adding external capacitance however affects the
voltage control loop of the module, typically causing
the loop to slow down with sluggish response. Larger
values of external capacitance could also cause the
module to become unstable.
The Tunable LoopTM allows the user to externally
adjust the voltage control loop to match the filter
network connected to the output of the module. The
Tunable Loop is implemented by connecting a series
R-C between the SENSE and TRIM pins of the
module, as shown in Fig. 44. This R-C allows the user
to externally adjust the voltage loop feedback
compensation of the module.
Figure. 44. Circuit diagram showing connection of
RTUME and CTUNE to tune the control loop of the
module.
MODULE
VOUT
SENSE
TRIM
GND
RTUNE
CTUNE
RTrim
C O
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 16
Recommended values of RTUNE and CTUNE for different
output capacitor combinations are given in Tables 2, 3,
4 and 5. Tables 2 and 4 show the recommended
values of RTUNE and CTUNE for different values of
ceramic output capacitors up to 470uF that might be
needed for an application to meet output ripple and
noise requirements for 5Vin and 3.3Vin respectively.
Selecting RTUNE and CTUNE according to Table 2 will
ensure stable operation of the module.
In applications with tight output voltage limits in the
presence of dynamic current loading, additional output
capacitance will be required. Tables 3 and 5 list
recommended values of RTUNE and CTUNE in order to
meet 2% output voltage deviation limits for some
common output voltages in the presence of a 1.5A to
3A step change (50% of full load), with an input
voltage of 5Vin and 3.3Vin respectively
Please contact your Lineage Power technical
representative to obtain more details of this feature as
well as for guidelines on how to select the right value
of external R-C to tune the module for best transient
performance and stable operation for other output
capacitance values or input voltages other than 3.3 or
5V.
Table 2. General recommended values of of RTUNE
and CTUNE for Vin=5V and various external ceramic
capacitor combinations.
Co 1x47μF 2x47μF 4x47μF 6x47μF10x47μF
RTUNE 33 33 33 33 33
CTUNE 6800pF 15nF 33nF 47nF 56nF
Table 3. Recommended values of RTUNE and CTUNE
to obtain transient deviation of ≤2% of Vout for a
1.5A step load with Vin=5V.
Vo 3.3V 2.5V 1.8V 1.2V 0.6V
Co 1 x
47μF
2 x
47μF
2 x
47μF
4 x
47μF
2 x 47μF
+330μF
Polymer
RTUNE 33 33 33 33 33
CTUNE 6800pF 15nF 15nF 33nF 82nF
ΔV 59mV 35mV 35mV 21mV 12mV
Table 4. General recommended values of of RTUNE
and CTUNE for Vin=3.3V and various external
ceramic capacitor combinations.
Co 1x47μF 2x47μF 4x47μF 6x47μF10x47μF
RTUNE 33 33 33 33 33
CTUNE 15nF 27nF 47nF 56nF 68nF
Table 5. Recommended values of RTUNE and CTUNE
to obtain transient deviation of ≤2% of Vout for a
1.5A step load with Vin=3.3V.
Vo 2.5V 1.8V 1.2V 0.6V
Co 2 x 47μF2 x 47μF 4 x 47μF
4 x 47μF
+330μF
Polymer
RTUNE 33 33 33 33
CTUNE 22nF 27nF 47nF 150nF
ΔV 46mV 32mV 24mV 12mV
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 17
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should
always be provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel. The test set-up
is shown in Figure 45. The preferred airflow direction
for the module is shown in Figure 46.
A
ir
flow
x
Power Module
W
ind Tunnel
PWBs
12.7_
(0.50)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
Figure 45. Thermal Test Setup.
The thermal reference points, Tref used in the
specifications are shown in Figure 46. For reliable
operation the temperatures at these points 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 46. Preferred airflow direction and location
of hot-spot of the module (Tref).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 18
Shock and Vibration
The ruggedized (-D version) of the modules are designed to withstand elevated levels of shock and vibration to be able
to operate in harsh environments. The ruggedized modules have been successfully tested to the following conditions:
Non operating random vibration:
Random vibration tests conducted at 25C, 10 to 2000Hz, for 30 minutes each level, starting from 30Grms (Z axis) and
up to 50Grms (Z axis). The units were then subjected to two more tests of 50Grms at 30 minutes each for a total of 90
minutes.
Operating shock to 40G per Mil Std. 810F, Method 516.4 Procedure I:
The modules were tested in opposing directions along each of three orthogonal axes, with waveform and amplitude of
the shock impulse characteristics as follows:
All shocks were half sine pulses, 11 milliseconds (ms) in duration in all 3 axes.
Units were tested to the Functional Shock Test of MIL-STD-810, Method 516.4, Procedure I - Figure 516.4-4. A shock
magnitude of 40G was utilized. The operational units were subjected to three shocks in each direction along three axes
for a total of eighteen shocks.
Operating vibration per Mil Std 810F, Method 514.5 Procedure I:
The ruggedized (-D version) modules are designed and tested to vibration levels as outlined in MIL-STD-810F, Method
514.5, and Procedure 1, using the Power Spectral Density (PSD) profiles as shown in Table 6 and Table 7 for all axes.
Full compliance with performance specifications was required during the performance test. No damage was allowed to
the module and full compliance to performance specifications was required when the endurance environment was
removed. The module was tested per MIL-STD-810, Method 514.5, Procedure I, for functional (performance) and
endurance random vibration using the performance and endurance levels shown in Table 6 and Table 7 for all axes.
The performance test has been split, with one half accomplished before the endurance test and one half after the
endurance test (in each axis). The duration of the performance test was at least 16 minutes total per axis and at least
120 minutes total per axis for the endurance test. The endurance test period was 2 hours minimum per axis.
Table 6: Performance Vibration Qualification - All Axes
Frequency
(Hz)
PSD Level
(G2/Hz)
Frequency
(Hz)
PSD Level
(G2/Hz)
Frequency
(Hz)
PSD Level
(G2/Hz)
10 1.14E-03 170 2.54E-03 690 1.03E-03
30 5.96E-03 230 3.70E-03 800 7.29E-03
40 9.53E-04 290 7.99E-04 890 1.00E-03
50 2.08E-03 340 1.12E-02 1070 2.67E-03
90 2.08E-03 370 1.12E-02 1240 1.08E-03
110 7.05E-04 430 8.84E-04 1550 2.54E-03
130 5.00E-03 490 1.54E-03 1780 2.88E-03
140 8.20E-04 560 5.62E-04 2000 5.62E-04
Table 7: Endurance Vibration Qualification - All Axes
Frequency
(Hz)
PSD Level
(G2/Hz)
Frequency
(Hz)
PSD Level
(G2/Hz)
Frequency
(Hz)
PSD Level
(G2/Hz)
10 0.00803 170 0.01795 690 0.00727
30 0.04216 230 0.02616 800 0.05155
40 0.00674 290 0.00565 890 0.00709
50 0.01468 340 0.07901 1070 0.01887
90 0.01468 370 0.07901 1240 0.00764
110 0.00498 430 0.00625 1550 0.01795
130 0.03536 490 0.01086 1780 0.02035
140 0.0058 560 0.00398 2000 0.00398
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 19
Example Application Circuit
Requirements:
Vin: 3.3V
Vout: 1.8V
Iout: 2.25A max., worst case load transient is from 1.5A to 2.25A
ΔVout: 1.5% of Vout (27mV) for worst case load transient
Vin, ripple 1.5% of Vin (50mV, p-p)
MODULE
VOUT
SENSE
GND
TRIM
RTUNE
CTUNE
RTrim
VIN
CO1
+
CI2 CI1
Vin+ Vout+
ON/OFF
Q3
CI1 22μF/6.3V ceramic capacitor
CI2 47μF/6.3V bulk electrolytic
CO1 2 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)
CTune 27nF ceramic capacitor (can be 1206, 0805 or 0603 size)
RTune 33 ohms SMT resistor (can be 1206, 0805 or 0603 size)
RTrim 1kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 20
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.)
PIN FUNCTION
1 ON/OFF
2 VIN
3 GND
4 VOUT
5 SENSE
6 TRIM
7 GND
8 NC
9 SEQ
10 NC
PIN 7 PIN 8
PIN 10
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 21
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 ON/OFF
2 VIN
3 GND
4 VOUT
5 SENSE
6 TRIM
7 GND
8 NC
9 SEQ
10 NC
PIN 8 PIN 7
PIN 10
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 22
Packaging Details
The Pico TLynxTM 3A modules 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”)
Tape Width: 24.00 mm (0.945”)
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 23
Surface Mount Information
Pick and Place
The Pico TLynxTM 3A modules use an open frame
construction and are designed for a fully automated
assembly process. The modules are fitted with a label
designed to provide a large surface area for pick and
place operations. The label meets all the requirements
for surface mount processing, as well as safety
standards, and is able to withstand reflow
temperatures of up to 300oC. The label also carries
product information such as product code, serial
number and the location of manufacture.
Nozzle Recommendations
The module weight has been kept to a minimum by
using open frame construction. Variables such as
nozzle size, tip style, vacuum pressure and placement
speed should be considered to optimize this process.
The minimum recommended inside nozzle diameter for
reliable operation is 3mm. The maximum nozzle outer
diameter, which will safely fit within the allowable
component spacing, is 7 mm.
Bottom Side / First Side Assembly
This module is not recommended for assembly on the
bottom side of a customer board. If such an assembly
is attempted, components may fall off the module
during the second reflow process. If assembly on the
bottom side is planned, please contact Lineage Power
for special manufacturing process instructions.
Only ruggedized (-D version) modules with additional
epoxy will work with a customer’s first side assembly.
For other versions, first side assembly should be
avoided
Lead Free Soldering
The Pico TLynxTM 3A modules are lead-free (Pb-free)
and RoHS compliant and fully compatible in a Pb-free
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 Fig. 47. Soldering outside of the
recommended profile requires testing to verify results
and performance. For questions regarding Land grid
array(LGA) soldering, solder volume; please contact
Lineage Power for special manufacturing process
instructions
MSL Rating
The Pico TLynxTM 3A modules have a MSL rating of 2.
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.
Per J-STD-020 Rev. C
0
50
100
150
200
250
300
Reflow Time (Seconds)
Reflow Temp (°C)
Heating Zone
1°C/Second
Peak Temp 260°C
* Min. Time Above 235°C
15 Seconds
*Time Above 217°C
60 Seconds
Cooling
Zone
Figure 47. Recommended linear reflow profile
using Sn/Ag/Cu solder.
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).
Data Sheet
April 7, 2011
Pico TLynxTM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A output current
LINEAGE POWER 24
Document No: DS06-131 ver. 1.14
PDF name: APTH003A0X_ds.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 8. Device Codes
Device Code Input
Voltage Range
Output
Voltage
Output
Current
On/Off
Logic Sequencing Comcodes
APXH003A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative No CC109113313
APXH003A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Positive No CC109113321
APXH003A0X-SRDZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative No CC109158795
APTH003A0X-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative Yes CC109113338
APTH003A0X4-SRZ 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Positive Yes CC109113346
APTH003A0X-SR 2.4 – 5.5Vdc 0.6 – 3.63Vdc 3A Negative Yes CC109147484
Table 9. Coding Scheme
TLynx
family
Sequencing
feature.
Input
voltage
range
Output
current
Output
voltage
On/Off
logic
Options ROHS
Compliance
AP T H 003A0 X 4 -SR -D Z
T = with Seq.
X = w/o Seq.
H = 2.4 –
5.5V
3.0A X =
programmable
output
4 = positive
No entry =
negative
S = Surface
Mount
R =
Tape&Reel
D = 105C
operating
ambient, 40G
operating
shock as per
MIL Std 810F
Z = ROHS6
World Wide Headquarters
Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-888-LINEAGE(546-3243)
(Outside U.S.A.: +1-972-244-WATT(9288))
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
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Tel: +86.021.54279977*808
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Tel: +49.89.878067-280
India Headquarters
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a
pplication. No rights under any patent accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.
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2011 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.
