Preliminary Data Sheet
February 28, 2012
NQR002A0X4: Non-Isolated DC-DC Power Modules
3Vdc –14Vdc input; 0.6Vdc to 5.5Vdc Output;2A Output Current
RoHS Compliant
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Industrial applications
Features
Compliant to RoHS EU Directive 2002/95/EC (Z
versions)
Compatible in a Pb-free or SnPb wave-soldering
environment (Z versions)
Wide Input voltage range (3Vdc-14Vdc)
Output voltage programmable from 0.6 Vdc to 5.5Vdc
via external resistor
TM
Tunable Loop
to optimize dynamic output voltage
response
Fixed switching frequency
Output overcurrent protection (non-latching)
Over temperature protection
Remote On/Off
Small size: 10.4 mm x 13.5 mm x 8.1 mm
(0.41 in x 0.53 in x 0.32 in)
Wide operating temperature range (-40°C to 85°C)
†
UL* 60950-1Recognized, CSA
03 Certified, and VDE
‡
0805:2001-12 (EN60950-1)
C22.2 No. 60950-1-
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
The NQR002A0X4 SIP power modules are non-isolated dc-dc converters in an industry standard package that can
deliver up to 2A of output current with a full load efficiency of TBD at 3.3Vdc output voltage (V
modules operate over a wide range of input voltage (V
= 3Vdc-14Vdc) and provide a precisely regulated output
IN
voltage from 0.6Vdc to 5.5Vdc, programmable via an external resistor. Features include remote On/Off, adjustable
output voltage, over current and over temperature protection. A new feature, the Tunable Loop
optimize the dynamic response of the converter to match the load.
*
UL is a registered trademark of Underwriters Laborat ories, Inc.
†
CSA is a registered trademark of Canadian Standards A ssociation.
‡
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Or ganization of Standards
PDF name: NQR002A0X_ds.pdf
Document No: DS11-017 ver. 0.27
IN
= 12Vdc). These
TM
, allows the user to
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC 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
Operating Ambient Temperature All T
IN
A
-0.3 15 Vdc
-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 All VIN 3 12 14 Vdc
Maximum Input Current All I
(VIN=3V to 14V, IO=I
)
O, max
Input No Load Current
(VIN = 9Vdc, IO = 0, module enabled) V
(VIN = 12Vdc, IO = 0, module enabled) V
= 0.6 Vdc I
O,set
= 5.0Vdc I
O,set
Input Stand-by Current All I
IN,max
IN,No load
IN,No load
IN,stand-by
(VIN = 12Vdc, module disabled)
Inrush Transient All I2t 1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; V
14V
= I
, IO
; See Test Configurations)
Omax
=0 to
IN
All 20 mAp-p
Input Ripple Rejection (120Hz) All -65 dB
2.0 Adc
20 mA
48 mA
8 mA
LINEAGE POWER 2
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
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)
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
Output Regulation (for Vo ≥ 2.5Vdc)
Line (VIN=V
Load (IO=I
IN, min
O, min
to V
to I
) All -0.4
IN, max
) All
O, max
Output Regulation (for Vo <2.5Vdc)
Line (VIN=V
Load (IO=I
IN, min
O, min
to V
to I
) All -10
IN, max
) All
O, max
Output Ripple and Noise on nominal output
(VIN=V
IN, nom
and IO=I
O, min
to I
Cout = 22μF)
O, max
Peak-to-Peak (5Hz to 20MHz bandwidth) All
RMS (5Hz to 20MHz bandwidth) All
External Capacitance1
Without the Tunable Loop
TM
ESR ≥ 1 mΩ All C
With the Tunable Loop
TM
ESR ≥ 0.15 mΩ All C
ESR ≥ 10 mΩ All C
Output Current All I
Output Current Limit Inception (Hiccup Mode ) All I
Output Short-Circuit Current All I
(VO≤250mV) ( Hiccup Mode )
Efficiency (VIN= 6Vdc) V
VIN= 12Vdc, TA=25°C V
IO=I
O, max , VO
= V
V
O,set
V
V
V
Switching Frequency All f
1
External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as
getting the best transient response. See the Tunable Loop
All V
O, set
O, set
O
-1.5 +1.5 % V
-3.0
⎯
+3.0 % V
0.6 5.5 Vdc
O, set
O, set
⎯
⎯
⎯
⎯
⎯
⎯
50 100 mV
20 38 mV
+0.4 % V
0.8 % V
O, set
O, set
+10 mV
20 mV
pk-pk
rms
O, max
22
⎯
47 μF
O, max
O, max
o
O, lim
O, s/c
= 0.6Vdc η 69.2 %
O,set
= 1.2Vdc η 80.4 %
O, set
= 1.8Vdc η 85.5 %
O,set
= 2.5Vdc η 88.9 %
O,set
= 3.3Vdc η 91 %
O,set
= 5.0Vdc η 93.3 %
O,set
sw
TM
section for details.
0
0
0 2 Adc
180 % I
140 Arms
⎯
⎯
⎯
600
1000 μF
3000 μF
⎯
kHz
o,max
LINEAGE POWER 3
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (VIN=12V, VO=5Vdc, IO=0.8I
Telcordia Method
Weight
, TA=40°C) Per
O, max
TBD Hours
⎯
TBD
⎯
g (oz.)
LINEAGE POWER 4
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC 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
(VIN=V
signal referenced to GND)
Logic High (Enable pin open - Module ON)
Input High Current All IIH ― 1 mA
Input High Voltage All VIH 3.0 ― V
Logic Low (Module Off)
Input Low Current All IIL ― ― 10
Input Low Voltage All VIL -0.3 ― 0.3 V
Turn-On Delay and Rise Times
(IO=I
Case 1: Enable input is enabled and then
input power is applied (delay from instant at which
V
Case 2: Input power is applied for at least one second
and then Enable input is set enabled (delay from
instant at which Enable is enabled until Vo=10% of Vo,
set)
Output voltage Rise time (time for Vo to rise from 10%
of V
Output voltage overshoot 3.0 % V
IO= I
Overtemperature Protection All T
Input Undervoltage Lockout
to V
IN, min
O, max , VIN
=V
IN
IN, min
o,set to 90% of Vo, set)
; VIN = V
O, max
Turn-on Threshold All
Turn-off Threshold All
; Open collector or equivalent
IN, max
= V
until Vo=10% of Vo,set)
to within ±1% of steady state)
IN, nom, Vo
IN, min
to V
, TA = 25 oC
IN, max
All Tdelay 5 msec
All Tdelay 5.2 msec
All Trise
ref
V
IN, max
μA
1.4 msec
O, set
117 ºC
2.95 Vdc
2.8 Vdc
LINEAGE POWER 5
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Characteristic Curves
The following figures provide typical characteristics for the NQR002 (0.6V, 2A) at 25oC
90
80
70
60
50
40
Vin = 3V
Vin = 14V
Vin = 12V
EFFICIENCY, η (%)
30
00.511.52
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 1. Converter Efficiency versus Output Current.
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (500μs /div)
Figure 3. Typical output ripple and noise (V
o,max
).
I
IN
= 12V, Io =
2.5
2.0
1.5
1.0
0.5
0.0
OUTPUT CURRENT, Io (A)
25 35 45 55 65 75 85
NC
Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
(V) (100mV/div)
O
(A) (1Adiv) V
O
I
OUTPUT CURRENT, OUTPUT VOLTAGE
Figure 4. Transient Response to Dynamic Load
Change from 0% to 50% to 0% .
(V) (5V/div)
ON/OFF
(V) (200mV/div) V
O
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
TIME, t (5ms/div) TIME, t (5ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io =
o,max, Vin=
I
12V,Cext= 22uF).
(V) (5V/div)
IN
(V) (200mV/div) V
O
OUTPUT VOLTAGE INPUT VOLTAGE
V
Figure 6. Typical Start-up Using Input Voltage (V
12V, Cext=
22uF ,Io = I
o,max
).
IN
LINEAGE POWER 6
=
Preliminary Data Sheet
OUTPUT
CURRENT
OUTPUT
VOLTAGE
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Characteristic Curves
The following figures provide typical characteristics for the NQR002 (1.2V, 2A) at 25oC
100
90
80
70
60
50
Vin = 3V
Vin = 12V
Vin = 14V
EFFICIENCY, η (%)
40
00.511.52
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current.
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (500μs /div)
Figure 9. Typical output ripple and noise (V
o,max
).
I
IN
= 12V, Io =
2.5
2.0
1.5
1.0
0.5
0.0
OUTPUT CURRENT, Io (A)
25 35 45 55 65 75 85
NC
Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
(V) (100mV/div)
O
,
(A) (1Adiv) V
O
I
Figure 10. Transient Response to Dynamic Load
Change from 0% to 50% to 0%.
(V) (5V/div)
ON/OFF
(V) (500mV/div) V
O
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
TIME, t (5ms/div) TIME, t (5ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io =
o,max, Vin=
I
12V,Cext= 22uF).
(V) (5V/div)
IN
(V) (500mV/div) V
O
OUTPUT VOLTAGE INPUT VOLTAGE
V
Figure 12. Typical Start-up Using Input Voltage (V
12V, Cext=
22uF, Io = I
o,max
).
IN
=
LINEAGE POWER 7
Preliminary Data Sheet
OUTPUT
CURRENT
OUTPUT
VOLTAGE
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Characteristic Curves
The following figures provide typical characteristics for the NQR002 (1.8V, 2A) at 25oC.
100
90
80
70
60
50
Vin = 3V
Vin = 12V
Vin = 14V
EFFICIENCY, η (%)
40
00.511.52
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 13. Converter Efficiency versus Output Current.
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (500μs /div)
Figure 15. Typical output ripple and noise (V
o,max
).
= I
IN
= 12V, Io
2.5
2.0
1.5
1.0
0.5
0.0
OUTPUT CURRENT, Io (A)
25 35 45 55 65 75 85
NC
Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
(V) (100mV/div)
O
,
(A) (1Adiv) V
O
I
Figure 16. Transient Response to Dynamic Load
Change from 0% to 50% to 0%.
(V) (5V/div)
ON/OFF
(V) (500mV/div) V
O
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
TIME, t (5ms/div) TIME, t (5ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io =
o,max, Vin=
I
12V,Cext=22uF,).
(V) (5V/div)
IN
(V) (500mV/div) V
O
OUTPUT VOLTAGE INPUT VOLTAGE
V
Figure 18. Typical Start-up Using Input Voltage (V
o
= I
o,max
12V, Cext=22uF, I
).
LINEAGE POWER 8
IN
=
Preliminary Data Sheet
OUTPUT
CURRENT
OUTPUT
VOLTAGE
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Characteristic Curves
The following figures provide typical characteristics for the NQR002 (2.5V, 2A) at 25oC.
100
90
Vin = 3V
80
70
60
50
Vin = 12V
Vin = 14V
EFFICIENCY, η (%)
40
00.511.52
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 19. Converter Efficiency versus Output Current.
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (500μs /div)
Figure 21. Typical output ripple and noise (V
o,max
).
= I
IN
= 12V, Io
2.5
2.0
1.5
1.0
0.5
0.0
OUTPUT CURRENT, Io (A)
25 35 45 55 65 75 85
NC
Figure 20. Derating Output Current versus Ambient
Temperature and Airflow.
(V) (100mV/div)
O
,
(A) (1Adiv) V
O
I
Figure 22. Transient Response to Dynamic Load
Change from 0% to 50% to 0%.
(V) (5V/div)
ON/PFF
(V) (1V/div) V
O
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
TIME, t (5ms/div) TIME, t (5ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io =
o,max, Vin=
I
12V,Cext= 22uF ).
(V) (5V/div)
IN
(V) (1V/div) V
O
OUTPUT VOLTAGE INPUT VOLTAGE
V
Figure 24. Typical Start-up Using Input Voltage (V
12V, Cext=
22uF, Io = I
o,max
).
IN
=
LINEAGE POWER 9
Preliminary Data Sheet
OUTPUT
CURRENT
OUTPUT
VOLTAGE
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Characteristic Curves
The following figures provide typical characteristics for the NQR002 (3.3V, 2A) at 25oC.
100
95
90
85
80
75
70
65
EFFICIENCY, η (%)
60
Vin = 4.5V
00.511.52
Vin = 12V
Vin = 14V
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 25. Converter Efficiency versus Output Current.
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (500μs /div)
Figure 27. Typical output ripple and noise (V
o,max
).
= I
IN
= 12V, Io
2.5
2.0
1.5
1.0
0.5
0.0
OUTPUT CURRENT, Io (A)
25 35 45 55 65 75 85
NC
Figure 26. Derating Output Current versus Ambient
Temperature and Airflow.
(V) (100mV/div)
O
,
(A) (1Adiv) V
O
I
Figure 28. Transient Response to Dynamic Load
Change from 0% to 50% to 0%.
(V) (5V/div)
ON?OFF
(V) (1V/div) V
O
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
TIME, t (5ms/div) TIME, t (5ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io =
o,max, Vin=
I
12V,Cext= 22uF)
(V) (5V/div)
IN
(V) (1V/div) V
O
OUTPUT VOLTAGE INPUT VOLTAGE
V
Figure 30. Typical Start-up Using Input Voltage (V
12V, Cext=
22uF, Io = I
o,max
).
LINEAGE POWER 10
IN
=
Preliminary Data Sheet
OUTPUT
CURRENT
OUTPUT
VOLTAGE
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Characteristic Curves
The following figures provide typical characteristics for the NQR002 (5V, 2A) at 25oC.
100
95
90
85
80
75
Vin = 6.5V
Vin = 12V
Vin = 14V
EFFICIENCY, η (%)
70
00.511.52
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 31. Converter Efficiency versus Output Current.
(V) (20mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (500μs /div)
Figure 33. Typical output ripple and noise (V
o,max
).
= I
IN
= 12V, Io
2.5
2.0
1.5
1.0
0.5
0.0
OUTPUT CURRENT, Io (A)
25 35 45 55 65 75 85
NC
Figure 32. Derating Output Current versus Ambient
Temperature and Airflow.
(V) (100mV/div)
O
,
(A) (1Adiv) V
O
I
Figure 34. Transient Response to Dynamic Load
Change from 0% to 50% to 0%.
(V) (5V/div)
ON/OFF
(V) (2V/div) V
O
OUTPUT VOLTAG E ON/OFF VOLTAGE
V
TIME, t (5ms/div) TIME, t (5ms/div)
Figure 35. Typical Start-up Using On/Off Voltage (Io =
o,max, Vin=
I
12V,Cext= 22uF).
(V) (5V/div)
IN
OUTPUT VOLTAGE INPUT VOLTAGE
Vo (V) (2V/div) V
Figure 36. Typical Start-up Using Input Voltage (V
o
= I
o,max,
12V, I
Cext= 22uF).
IN
=
LINEAGE POWER 11
Preliminary Data Sheet
February 28, 2012
NQR002A0X4: Non-Isolated DC-DC Power Modules
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
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 induc tance (L
possible battery impedance. Measure current as shown
above.
) of 1μH. Capacit or CS offsets
TEST
Figure 1. Input Reflected Ripple Current Test Setup.
COPPER STRIP
V
(+)
O
1uF .
COM
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 2. Output Ripple and Noise Test Setup.
R
R
contact
distribution
R
R
contact
distribution
NOTE: All volt age measurements to be tak en at th e module
terminals , as shown above. If socket s are us ed then
Kelvin conn ections ar e required at the modul e terminals
to avoid measur ement err ors due to sock et contact
resistance.
VIN(+)
V
IN
COM
Figure 3. Output Voltage and Efficiency Test Setup.
V
. I
O
Efficiency
=
η
VIN. I
O
IN
10uF
V
COM
O
CURRENT PROBE
CIN
2x100μF
Tantalum
SCOPE
V
O
x 100 %
VIN(+)
COM
RESISTIVE
LOAD
R
contactRdistribution
R
contactRdistribution
R
LOAD
Design Considerations
Input Filtering
The NQR002A0X4 2A 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 or
polymer capacitors are recommended at the input of the
module. Figure 4 shows the input ripple voltage for
various output voltages at 2A of load current with 1x22
µF or 2x22 µF ceramic capacitors and an input of 12V.
TBD
Input Ripple Voltage (mVp-p)
Output Voltage (Vdc)
Figure 4. Input ripple voltage for various output
voltages with 1x22 µF or 2x22 µF ceramic
capacitors at the input (2A load). Input voltage is
12V.
Output Filtering
The NQR002A0X4 2A modules are designed for low
output ripple voltage and will meet the maximum output
ripple specification with no external capacitors.
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 are recommended to improve the dynamic
response of the module. Figure 5 provides output ripple
information for different external capacitance values at
various Vo and for a load current of 2A. 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
TM
Loop
feature described later in this data sheet.
LINEAGE POWER 12
Preliminary Data Sheet
_
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Figure 5. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or
4x47 µF ceramic capacitors at the output (2A load).
Input voltage is 12V.
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.
An input fuse for the module is recommended. Due to
the wide input voltage and output voltage ranges of the
module, a 4A, 125Vdc fast acting fuse is recommended
Feature Descriptions
Enable (Remote On/Off)
The NQR002A0X4 2A power modules feature a Enable
pin with positive logic for remote On/Off operation. If the
Enable pin is not being used, leave the pin open (the
module will be ON). The Enable signal (V
referenced to ground. During a Logic High on the
Enable pin, the module remains ON. During Logic-Low,
the module is turned OFF.
VIN+
ON/OFF
GND
Rpullup
I
ON/OFF
+
V
ON/OFF
Q1
MODULE
20K
10K
10K
20K
Q2
Figure 6. Remote On/Off Implementation(positive
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. The average output current during hiccup is 10%
I
.
O, max
Overtemperature Protection
To provide protection in a fault condition, these modules
are equipped with a thermal shutdown circuit. The unit
will shut down if the overtemperature threshold of 130ºC
is exceeded at the thermal reference point T
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.
10K
On/Off
10K
ref
) is
PWM Enabl e
Q3
. The
LINEAGE POWER 13
Preliminary Data Sheet
February 28, 2012
NQR002A0X4: Non-Isolated DC-DC Power Modules
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
Feature Descriptions
Output Voltage Programming
The output voltage of the NQR002A0X4 2A module can
be programmed to any voltage from 0.6dc to 5.5Vdc 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. 7. The Lower Limit curve shows
that for output voltages of 2.4V and higher, the input
voltage needs to be larger than the minimum of 3V.
16
14
12
10
8
6
Input Voltage (v)
4
2
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Figure 7. 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:
Rtrim
Rtrim is the external resistor in kΩ
Vo is the desired output voltage
Table 1 provides Rtrim values required for some
common output voltages.
(continued)
Output Voltage (V)
12
−
Ω
6.0
= k
()
Vo
Table 1
(V)
Rtrim (KΩ)
Vout
R
trim
V
O, set
0.6 Open
0.9 40
1.0 30
1.2 20
1.5 13.33
1.8 10
2.5 6.316
3.3 4.444
5.0 2.727
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.
VIN(+)
ON/OFF
Figure 8. Circuit configuration for programming
output voltage using an external resistor.
VO(+)
TRIM
GND
Voltage Margining
Output voltage margining can be implemented in the
NQR002A0X4 2A modules by connecting a resistor,
R
margining-up the output voltage and by connecting a
resistor, R
margining-down. Figure 9 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
voltage and % margin. Please consult your local
Lineage Power Field Application Engineer or Account
Manager for additional details.
, from the Trim pin to the ground pin for
margin-up
margin-down
margin-up
, from the Trim pin to output pin for
and R
margin-down
for a specific output
LOAD
LINEAGE POWER 14
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
Feature Descriptions (continued)
Vo
Rmargin-down
MODULE
Q2
Trim
Rmargin-up
Rtrim
NQR002A0X4: Non-Isolated DC-DC Power Modules
with an input voltage of 12V. Table 3 shows the
recommended values of R
values of ceramic output capacitors up to TBD, again for
an input voltage of 12V. The value of R
never be lower than the values shown in Tables 3 and
4. 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.
VOUT
TUNE
and C
for different
TUNE
should
TUNE
Q1
GND
Figure 9. Circuit Configuration for margining
Output voltage.
Monotonic Start-up and Shutdown
The NQR002A0X4 2A modules have monotonic start-up
and shutdown behavior for any combination of rated
input voltage, output current and operating temperature
range.
Tunable Loop
The NQR002A0X4 2A modules have a new feature that
optimizes transient response of the module called
Tunable Loop
to improve output voltage transient response due to
load current changes. Sensitive loads may also require
additional output capacitance to reduce output ripple
and noise. 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.
To use the additional external capacitors in an optimal
manner, the Tunable Loop
be tuned externally by connecting a series R-C between
the VOUT and TRIM pins of the module, as shown in
Fig. 10. This R-C allows the user to externally adjust
the voltage loop feedback compensation of the module
to match the filter network connected to the output of
the module.
Recommended values of R
Tables 2 and 3. Table 2 lists recommended values of
R
and C
TUNE
deviation limits for some common output voltages in the
presence of a 1A to 2A step change (50% of full load),
TM
TM
. External capacitors are usually added
TM
feature allows the loop to
and C
TUNE
in order to meet 2% output voltage
TUNE
are given in
TUNE
RTUNE
MODULE
CTUNE
TRIM
GND
Figure. 10. Circuit diagram showing connection of
R
and C
TUME
module.
Table 2. Recommended values of R
obtain transient deviation of 2% of Vout for a 1A
step load with Vin=12V.
TBD
Table 3. General recommended values of of R
and C
TUNE
capacitor combinations.
TBD
to tune the control loop of the
TUNE
for Vin=12V and various external ceramic
RTrim
TUNE
and C
TUNE
TUNE
to
LINEAGE POWER 15
Preliminary Data Sheet
p
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC 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 11. The preferred airflow direction
for the module is in Figure 12.
76.2
[3.0]
50.8
[2.00]
[0.285]
7.24
Power Module
Probe Location
for measuring
airflow and
ambient
erature
tem
Wind Tunnel
PWBs
Air
Flow
Figure 11. Thermal Test Set-up.
The thermal reference point, T
specifications of thermal derating curves is shown in
Figure 12. For reliable operation this temperature
should not exceed 120
The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame BoardMounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
o
C.
used in the
ref
Figure 12. T
Temperature measurement location.
ref
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.
Through-Hole Lead-Free Soldering
Information
These 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 representative for
more details.
LINEAGE POWER 16
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Example Application Circuit
Requirements:
Vin: 12V
Vout: 1.8V
Iout: 1A max., worst case load transient is from 1A to 1.5A
ΔVout: 1.5% of Vout (27mV) for worst case load transient
Vin, ripple 1.5% of Vin (180mV, p-p)
Vin+
VIN
VOUT
SENSE
Vout+
RTUNE
+
CI2
CI1 TBD
CI2 TBD
CO1 TBD
CTune TBD
RTune TBD
RTrim 10kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
CI1
Q3
MODULE
ON/OFF
GND
CTUNE
TRIM
RTrim
CO1
LINEAGE POWER 17
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC 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.)
LINEAGE POWER 18
Document No: DS11-017 ver. 0.27
PDF name: NQR002A0X_ds.pdf
Preliminary Data Sheet
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC 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.)
LINEAGE POWER 19
Preliminary Data Sheet
a
©
February 28, 2012
3 – 14Vdc input; 0.6Vdc to 5.5Vdc Output; 2A output current
NQR002A0X4: Non-Isolated DC-DC Power Modules
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 4. Device Codes
Device Code
Input
Voltage Range
NQR002A0X4Z 3 – 14Vdc 0.6 – 5.5Vdc 2A Positive SIP CC109171468
-Z refers to RoHS compliant parts
Output
Voltage
Output
Current
On/Off
Logic
Connector
Type
Comcodes
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Tel: +86.021.54279977*808
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: +49.89.878067-280
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Tel: +91.80.28411633
Lineage Power reserves the right to make changes to the prod uct(s) or information contained herein without notice. No liability is assumed as a result of their use or
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 pat ents. Information on these patents is available at www.lineagepower.com/patents.
2010 Lineage Power Corporation, (Plano, Texas) All Internationa l Rights Reserved.
LINEAGE POWER 20
Document No: DS11-017 ver. 0.27
PDF name: NQR002A0X_ds.pdf
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