LINEAGEPOWER PDT012A0X

Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A Output Current
Features

Compliant to RoHS EU Directive 2002/95/EC (Z
versions)

Compatible in a Pb-free or SnPb reflow
environment (Z versions)

DOSA based

Wide Input voltage range (3Vdc-14.4Vdc)

Output voltage programmable from 0.6Vdc to
5.5Vdc via external resistor

Digital interface through the PMBusTM # protocol
RoHS Compliant

Tunable LoopTM to op timize dynamic output
voltage response
Applications

Flexible output voltage sequencing EZSEQUENCE

Power Good signal

Fixed switching frequency with capability of
external synchronization

Distributed power architectures

Intermediate bus voltage applications

Telecommunications equipment

Servers and storage applications

Output overcurrent protection (non-latching)

Networking equipment

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 8.5 mm
(0.48 in x 0.48 in x 0.335 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
Industrial equipment

Vin+
VIN
PGOOD
Vout+
VOUT
VS+
RTUNE
MODULE
SEQ
CTUNE
CLK
TRIM
DATA
ADDR0
SMBALRT#
ADDR1
Cin
Q1
ON/OFF
GND
Co
RTrim
RADDR1
RADDR0
SIG_GND
GND VS-
†
Description
The 12A Digital Pico DLynxTM power modules are non-isolated dc-dc converters that can deliver up to 12A of output
current. These modules operate over a wide range of input voltage (VIN = 3Vdc-14.4Vdc) and provide a precisely
regulated output voltage from 0.6Vdc to 5.5Vdc, programmable via an external resistor. Features include a digital
interface using the PMBus protocol, remote On/Off, adjustable output voltage, over current and overtemperature
protection. The PMBus interface supports a range of commands to both control and monitor the module. The
module also includes the Tunable LoopTM feature that 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.
* 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: DS10-009 ver. 0.27
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter
Device
Symbol
Min
Max
Unit
All
VIN
-0.3
15
V
Input Voltage
Continuous
SEQ, SYNC, VS+
All
7
V
CLK, DATA, SMBALERT
All
3.6
V
Operating Ambient Temperature
All
TA
-40
85
°C
All
Tstg
-55
125
°C
(see Thermal Considerations section)
Storage Temperature
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Device
Symbol
Min
Typ
Max
Unit
3
⎯
14.4
Vdc
9
Adc
Operating Input Voltage
All
VIN
Maximum Input Current
All
IIN,max
VO,set = 0.6 Vdc
IIN,No load
52
mA
(VIN=3V to 14V, IO=IO, max )
Input No Load Current
(VIN = 12Vdc, IO = 0, module enabled)
VO,set = 5Vdc
IIN,No load
85
mA
Input Stand-by Current
(VIN = 12Vdc, module disabled)
All
IIN,stand-by
6.5
mA
Inrush Transient
All
It
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN =0 to
14V, IO= IOmax ; See Test Configurations)
All
40
mAp-p
Input Ripple Rejection (120Hz)
All
-55
dB
LINEAGE POWER
2
1
2
As
2
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Electrical Specifications (continued)
Parameter
Device
Symbol
Min
Output Voltage Set-point (with 0.1% tolerance for
external resistor used to set output voltage)
All
VO, set
-1.0
Output Voltage (Over all operating input voltage, resistive
load, and temperature conditions until end of life)
All
VO, set
-3.0
Adjustment Range (selected by an external resistor)
(Some output voltages may not be possible depending
on the input voltage – see Feature Descriptions Section)
All
VO
0.6
PMBus Adjustable Output Voltage Range
All
VO,adj
-25
PMBus Output Voltage Adjustment Step Size
All
Remote Sense Range
All
Typ
⎯
0
Max
Unit
+1.0
% VO, set
+3.0
% VO, set
5.5
Vdc
+25
%VO,set
0.4
%VO,set
0.5
Vdc
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
⎯
10mV
% VO, set
Output Regulation (for VO < 2.5Vdc)
Line (VIN=VIN, min to VIN, max)
All
⎯
5
mV
Load (IO=IO, min to IO, max)
All
⎯
10
mV
Temperature (Tref=TA, min to TA, max)
All
⎯
0.4
% VO, set
50
100
mVpk-pk
20
38
mVrms
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 22 μF
ceramic capacitors)
Peak-to-Peak (5Hz to 20MHz bandwidth)
RMS (5Hz to 20MHz bandwidth)
External Capacitance
⎯
All
All
1
TM
Without the Tunable Loop
All
CO, max
22
⎯
47
μF
ESR ≥ 0.15 mΩ
All
CO, max
22
⎯
1000
μF
ESR ≥ 10 mΩ
All
CO, max
22
⎯
5000
μF
Output Current (in either sink or source mode)
All
Io
0
12
Adc
Output Current Limit Inception (Hiccup Mode)
(current limit does not operate in sink mode)
All
IO, lim
130
% Io,max
Output Short-Circuit Current
All
IO, s/c
0.92
A
ESR ≥ 1 mΩ
With the Tunable Loop
TM
(VO≤250mV) ( Hiccup Mode )
PMBus Output Current Measurement Accuracy
Efficiency
All
TBD
VO,set = 0.6Vdc
η
76.4
%
VIN= 12Vdc, TA=25°C
VO, set = 1.2Vdc
η
86.0
%
IO=IO, max , VO= VO,set
VO,set = 1.8Vdc
η
89.9
%
VO,set = 2.5Vdc
η
92.2
%
VO,set = 3.3Vdc
η
93.6
%
Switching Frequency
1
VO,set = 5.0Vdc
η
All
fsw
95.4
⎯
600
%
⎯
kHz
TM
External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as
TM
getting the best transient response. See the Tunable Loop section for details.
LINEAGE POWER
3
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Electrical Specifications (continued)
Parameter
Device
Frequency Synchronization
Symbol
Min
Typ
Max
Unit
720
kHz
All
Synchronization Frequency Range
All
High-Level Input Voltage
All
510
VIH
2.0
V
Low-Level Input Voltage
All
VIL
0.4
V
Input Current, SYNC
All
ISYNC
100
nA
Minimum Pulse Width, SYNC
All
tSYNC
100
ns
Maximum SYNC rise time
All
tSYNC_SH
100
ns
General Specifications
Parameter
Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2
Method 1 Case 3
Device
Min
All
Max
TBD
⎯
Weight
Typ
Unit
Hours
⎯
TBD
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
Input High Current
All
IIH
Input High Voltage
All
VIH
Min
Typ
Max
Unit
⎯
1
mA
⎯
VIN,max
V
On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
Signal referenced to GND)
Device code with suffix “4” – Positive Logic (See Ordering
Information)
Logic High (Module ON)
2.0
Logic Low (Module OFF)
Input Low Current
All
IIL
⎯
⎯
1
mA
Input Low Voltage
All
VIL
-0.2
⎯
0.6
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
2.0
―
VIN, max
Vdc
Logic Low (Module ON)
Input low Current
All
IIL
―
―
10
μA
Input Low Voltage
All
VIL
-0.2
―
0.6
Vdc
LINEAGE POWER
4
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Feature Specifications (cont.)
Parameter
Device
Symbol
Min
Typ
Max
Units
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
―
1.1
―
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
―
700
―
μsec
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set)
All
Trise
―
3.1
―
msec
3.0
% VO, set
Turn-On Delay and Rise Times
(VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state)
o
Output voltage overshoot (TA = 25 C
VIN= VIN, min to VIN, max,IO = IO, min to IO, max)
With or without maximum external capacitance
Over Temperature Protection
(See Thermal Considerations section)
PMBus Over Temperature Warning Threshold
Tracking Accuracy
All
Tref
145
130
°C
All
TWARN
(Power-Up: 2V/ms)
All
VSEQ –Vo
100
mV
°C
(Power-Down: 2V/ms)
All
VSEQ –Vo
100
mV
Vdc
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Input Undervoltage Lockout
Turn-on Threshold
All
2.475
3.025
Turn-off Threshold
All
2.25
2.75
Hysteresis
All
0.25
PMBus Adjustable Input Under Voltage Lockout Thresholds
All
2.5
Resolution of Adjustable Input Under Voltage Threshold
All
Vdc
Vdc
14
Vdc
500
mV
PGOOD (Power Good)
Signal Interface Open Drain, Vsupply ≤ 5VDC
Overvoltage threshold for PGOOD ON
108
%VO, set
Overvoltage threshold for PGOOD OFF
105
%VO, set
Undervoltage threshold for PGOOD ON
110
%VO, set
Undervoltage threshold for PGOOD OFF
90
%VO, set
Pulldown resistance of PGOOD pin
LINEAGE POWER
All
50
Ω
5
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Digital Interface Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter
Conditions
Symbol
Min
Input High Voltage (CLK, DATA)
VIH
2.1
Input Low Voltage (CLK, DATA)
VIL
Input high level current (CLK, DATA)
IIH
-10
IIL
-10
Typ
Max
Unit
3.6
V
PMBus Signal Interface Characteristics
Input low level current (CLK, DATA)
0.8
V
10
μA
10
μA
0.4
V
10
μA
400
kHz
Output Low Voltage (CLK, DATA, SMBALERT#)
IOUT=2mA
VOL
Output high level open drain leakage current
(DATA, SMBALERT#)
VOUT=3.6V
IOH
Slave Mode
FPMB
10
Receive Mode
Transmit Mode
tHD:DAT
0
300
ns
tSU:DAT
250
ns
Read delay time
tDLY
153
Output current measurement range
IRNG
0
Output current measurement resolution
IRES
62.5
Output current measurement gain accuracy
IACC
Pin capacitance
PMBus Operating frequency range
Data hold time
Data setup time
0
CO
0.7
pF
Measurement System Characteristics
Output current measurement offset
192
231
μs
18
A
mA
IOFST
TBD
%
TBD
A
VOUT measurement range
VOUT(rng)
VOUT measurement resolution
VOUT(res)
VOUT measurement gain accuracy
VOUT(gain)
-2
2
LSB
VOUT measurement offset
VOUT(ofst)
-3
3
LSB
VIN measurement range
VIN(rng)
0
14.4
VIN measurement resolution
VIN(res)
VIN measurement gain accuracy
VIN(gain)
-2
2
LSB
VIN measurement offset
VIN(ofst)
-5.5
1.4
LSB
LINEAGE POWER
0
5.5
16.25
V
mV
32.5
V
mV
6
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Characteristic Curves
The following figures provide typical characteristics for the 12A Digital Pico DLynxTM at 0.6Vo and 25oC.
85
12
Vin=3V
75
EFFICIENCY, η (%)
OUTPUT CURRENT, Io (A)
80
70
Vin=12V
Vin=14V
65
60
55
50
0
2
4
6
8
10
12
1.5m/s
(300LFM)
Ruggedized (D)
Part (105°C)
4
2
2m/s
(400LFM)
1m/s
(200LFM)
0
65
75
85
95
105
OUTPUT VOLTAGE
VO (V) (5mV/div)
IO (A) (10Adiv)
TIME, t (20μs /div)
INPUT VOLTAGE
VIN (V) (5V/div)
VO (V) (200mV/div)
Figure 4. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout=
3x47uF+6x330uF, CTune=47nF, RTune=180ohms
OUTPUT VOLTAGE
VON/OFF (V) (5V/div)
VO (V) (200mV/div)
0.5m/s
(100LFM)
Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT CURRENT,
VO (V) (20mV/div)
OUTPUT VOLTAGE
ON/OFF VOLTAGE
OUTPUT VOLTAGE
LINEAGE POWER
6
O
TIME, t (1μs/div)
TIME, t (2ms/div)
Standard Part
(85°C)
AMBIENT TEMPERATURE, TA C
Figure 1. Converter Efficiency versus Output Current.
Figure 5. Typical Start-up Using On/Off Voltage (Io =
Io,max).
NC
8
55
OUTPUT CURRENT, IO (A)
Figure 3. Typical output ripple and noise (CO=22μF
ceramic, VIN = 12V, Io = Io,max, ).
10
TIME, t (2ms/div)
Figure 6. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
7
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Characteristic Curves
The following figures provide typical characteristics for the 12A Digital Pico DLynx
TM
o
at 1.2Vo and 25 C.
95
12
90
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
85
Vin=3V
80
75
Vin=14V
Vin=12V
70
65
60
55
50
0
2
4
6
8
10
12
1m/s
(200LFM)
Ruggedized (D)
Part (105°C)
2
1.5m/s
(300LFM)
2m/s
(400LFM)
0
65
75
85
95
105
OUTPUT VOLTAGE
VO (V) (10mV/div)
IO (A) (10Adiv)
TIME, t (20μs /div)
INPUT VOLTAGE
VIN (V) (5V/div)
VO (V) (500mV/div)
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout=
1x47uF+3x330uF, CTune=10nF & RTune=220ohms
OUTPUT VOLTAGE
VON/OFF (V) (5V/div)
VO (V) (500mV/div)
Standard
Part (85 C)
4
Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT CURRENT,
VO (V) (20mV/div)
OUTPUT VOLTAGE
ON/OFF VOLTAGE
OUTPUT VOLTAGE
LINEAGE POWER
6
O
TIME, t (1μs/div)
Figure 1. Typical Start-up Using On/Off Voltage (Io =
Io,max).
0.5m/s
(100LFM)
AMBIENT TEMPERATURE, TA C
Figure 7. Converter Efficiency versus Output Current.
TIME, t (2ms/div)
NC
8
55
OUTPUT CURRENT, IO (A)
Figure 9. Typical output ripple and noise (CO=22μF
ceramic, VIN = 12V, Io = Io,max, ).
10
TIME, t (2ms/div)
Figure 12. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
8
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Characteristic Curves
The following figures provide typical characteristics for the 12A Digital Pico DLynxTM at 1.8Vo and 25oC.
95
12
OUTPUT CURRENT, Io (A)
90
EFFICIENCY, η (%)
Vin=3.5V
85
Vin=12V
Vin=14V
80
75
70
0
2
4
6
8
10
12
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT,
IO (A) (10Adiv)
VO (V) (20mV/div)
OUTPUT VOLTAGE
TIME, t (1μs/div)
Standard Part
(85°C)
4
1m/s
(200LFM)
1.5m/s
(300LFM)
Ruggedized (D)
Part (105°C)
2
2m/s
(400LFM)
0
65
75
85
95
O
AMBIENT TEMPERATURE, TA C
105
VIN (V) (5V/div)
VO (V) (500mV/div)
Figure 16. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout=
1x47uF+2x330uF,CTune=5600pF & RTune=270ohms
INPUT VOLTAGE
VON/OFF (V) (5V/div)
VO (V) (500mV/div)
LINEAGE POWER
6
TIME, t (20μs /div)
OUTPUT VOLTAGE
ON/OFF VOLTAGE
OUTPUT VOLTAGE
TIME, t (2ms/div)
0.5m/s
(100LFM)
Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
Figure 13. Converter Efficiency versus Output Current.
Figure 17. Typical Start-up Using On/Off Voltage (Io =
Io,max).
NC
8
55
OUTPUT CURRENT, IO (A)
Figure 15. Typical output ripple and noise (CO=22μF
ceramic, VIN = 12V, Io = Io,max, ).
10
TIME, t (2ms/div)
Figure 18. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
9
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Characteristic Curves
The following figures provide typical characteristics for the 12A Digital Pico DLynx
TM
o
at 2.5Vo and 25 C.
100
12
90
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
95
Vin=4.5V
85
Vin=14V
Vin=12V
80
75
70
0
2
4
6
8
10
12
1.5m/s
(300LFM)
2
2m/s
(400LFM
0
65
75
85
95
O
AMBIENT TEMPERATURE, TA C
105
VO (V) (20mV/div)
OUTPUT VOLTAGE
TIME, t (20μs /div)
INPUT VOLTAGE
VIN (V) (5V/div)
VO (V) (1V/div)
VON/OFF (V) (5V/div)
VO (V) (1V/div)
1m/s
(200LFM)
Figure 22. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout=
1x47uF+1x330uF,CTune=3300pF & RTune=270ohms
OUTPUT VOLTAGE
ON/OFF VOLTAGE
OUTPUT VOLTAGE
LINEAGE POWER
Standard
Part (85°C)
4
IO (A) (10Adiv)
OUTPUT CURRENT,
VO (V) (20mV/div)
OUTPUT VOLTAGE
TIME, t (1μs/div)
TIME, t (2ms/div)
6
0.5m/s
(100LFM)
Figure 20. Derating Output Current versus Ambient
Temperature and Airflow.
Figure 19. Converter Efficiency versus Output Current.
Figure 23. Typical Start-up Using On/Off Voltage (Io =
Io,max).
NC
8
55
OUTPUT CURRENT, IO (A)
Figure 21. Typical output ripple and noise (CO=22μF
ceramic, VIN = 12V, Io = Io,max, ).
10
TIME, t (2ms/div)
Figure 24. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
10
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Characteristic Curves
The following figures provide typical characteristics for the 12A Digital Pico DLynxTM at 3.3Vo and 25oC.
100
12
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
95
90
Vin=4.5V
85
Vin=14V
Vin=12V
80
75
70
0
2
4
6
8
10
12
Ruggedized (D)
Part (105°C)
2
1.5m/s
(300LFM)
2m/s
(400LFM)
0
65
75
85
95
105
OUTPUT VOLTAGE
VO (V) (50mV/div)
IO (A) (10Adiv)
TIME, t (20μs /div)
INPUT VOLTAGE
VIN (V) (5V/div)
VO (V) (1V/div)
Figure 28 Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout=
1x47uF+1x330uF,CTune=2700pF & RTune=330ohms
OUTPUT VOLTAGE
VON/OFF (V) (5V/div)
VO (V) (1V/div)
1m/s
(200LFM)
Figure 26. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT CURRENT,
VO (V) (20mV/div)
OUTPUT VOLTAGE
ON/OFF VOLTAGE
OUTPUT VOLTAGE
LINEAGE POWER
Standard
Part (85°C)
4
O
TIME, t (1μs/div)
TIME, t (2ms/div)
0.5m/s
(100LFM)
6
AMBIENT TEMPERATURE, TA C
Figure 25. Converter Efficiency versus Output Current.
Figure 29. Typical Start-up Using On/Off Voltage (Io =
Io,max).
NC
8
55
OUTPUT CURRENT, IO (A)
Figure 27. Typical output ripple and noise (CO=22μF
ceramic, VIN = 12V, Io = Io,max, ).
10
TIME, t (2ms/div)
Figure 30. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
11
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Characteristic Curves
The following figures provide typical characteristics for the 12A Digital Pico DLynx
TM
o
at 5Vo and 25 C.
100
12
OUTPUT CURRENT, Io (A)
EFFICIENCY, η (%)
95
90
Vin=7V
Vin=14V
Vin=12V
85
80
75
70
0
2
4
6
8
10
12
2
1.5m/s
(300LFM)
2m/s
(400LFM)
0
55
65
75
85
95
O
AMBIENT TEMPERATURE, TA C
105
VO (V) (50mV/div)
OUTPUT VOLTAGE
TIME, t (20μs /div)
INPUT VOLTAGE
VIN (V) (5V/div)
VO (V) (2V/div)
VON/OFF (V) (5V/div)
VO (V) (2V/div)
Ruggedized (D)
Part (105°C)
1m/s
(200LFM)
Figure 34. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout= 5x47uF,
CTune=1500pF & RTune=330ohms
OUTPUT VOLTAGE
ON/OFF VOLTAGE
OUTPUT VOLTAGE
LINEAGE POWER
Standard
Part (85°C)
4
IO (A) (10Adiv)
OUTPUT CURRENT,
VO (V) (20mV/div)
OUTPUT VOLTAGE
TIME, t (1μs/div)
Figure 35. Typical Start-up Using On/Off Voltage (Io =
Io,max).
6
0.5m/s
(100LFM)
Figure 32. Derating Output Current versus Ambient
Temperature and Airflow.
Figure 31. Converter Efficiency versus Output Current.
TIME, t (2ms/div)
NC
8
45
OUTPUT CURRENT, IO (A)
Figure 33. Typical output ripple and noise (CO=22μF
ceramic, VIN = 12V, Io = Io,max, ).
10
TIME, t (2ms/div)
Figure 36. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
12
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
electrical specification table. Optimal performance of
the module can be achieved by using the Tunable
LoopTM feature described later in this data sheet.
Design Considerations
Input Filtering
TM
60
1x22uF Ext Cap
1x47uF Ext Cap
50
Ripple (mVp-p)
The 12A Digital Pico DLynx 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, ceramic capacitors
are recommended at the input of the module. Figure
37 shows the input ripple voltage for various output
voltages at 12A of load current with 2x22 µF or 3x22
µF ceramic capacitors and an input of 12V.
2x47uF Ext Cap
4x47uF Ext Cap
40
30
20
10
250
2x22uF
0
Ripple (mVp-p)
3x22uF
200
0.5
1.5
2.5
3.5
4.5
Output Voltage(Volts)
Figure 38. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or
4x47 µF ceramic capacitors at the output (12A
load). Input voltage is 12V.
150
100
Safety Considerations
50
0.5
1.5
2.5
3.5
4.5
Output Voltage(Volts)
Figure 37. Input ripple voltage for various
output voltages with 2x22 µF or 3x22 µF ceramic
capacitors at the input (12A load). Input voltage
is 12V.
Output Filtering
These modules are designed for low output ripple
voltage and will meet the maximum output ripple
specification with 0.1 µF ceramic and 22 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.
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 2nd, CSA C22.2 No.
60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805
Teil 1 + A11):2009-11; EN 60950-1:2006 + A11:200903.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power
module has extra-low voltage (ELV) outputs when all
inputs are ELV.
The input to these units is to be provided with a fastacting fuse with a maximum rating of TBD A in the
positive input lead.
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. Figure
38 provides output ripple information for different
external capacitance values at various Vo and a full
load current of 12A. For stable operation of the
module, limit the capacitance to less than the
maximum output capacitance as specified in the
LINEAGE POWER
13
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Analog Feature Descriptions
DLYNX MODULE
+3.3V
+VIN
Remote On/Off
The module can be turned ON and OFF either by
using the ON/OFF pin (Analog interface) or through
the PMBus interface (Digital). The module can be
configured in a number of ways through the PMBus
interface to react to the two ON/OFF inputs:
Rpullup
I
For negative logic On/Off modules, the circuit
configuration is shown in Fig. 40. The On/Off pin
should be pulled high with an external pull-up resistor
(suggested value for the 3V to 14V input range is
20Kohms). When transistor Q2 is in the OFF state, the
On/Off pin is pulled high, transistor Q1 is turned ON
and the module is OFF. To turn the module ON, Q2 is
turned ON pulling the On/Off pin low, turning transistor
Q1 OFF resulting in the PWM Enable pin going high.
Digital On/Off
Please see the Digital Feature Descriptions
section.
LINEAGE POWER
22K
V
ON/OFF
_
GND
Figure 39. Circuit configuration for using positive
On/Off logic.
DLYNX MODULE
+3.3V
+VIN
Rpullup
I
10K
ON/OFF
ENABLE
22K
Q1
+
TM
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 39. When the
external transistor Q2 is in the OFF state, the internal
transistor Q1 is turned ON, and the internal PWM
#Enable signal is pulled low causing the module to be
ON. When transistor Q2 is turned ON, the On/Off pin is
pulled low and the module is OFF. A suggested value
for Rpullup is 20kΩ.
Q1
Q2
Analog On/Off
The 12A Digital Pico DLynx power 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 should be 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.
ENABLE
22K
ON/OFF
+
•
Module ON/OFF can be controlled only
through the analog interface (digital interface
ON/OFF commands are ignored)
•
Module ON/OFF can be controlled only
through the PMBus interface (analog
interface is ignored)
•
Module ON/OFF can be controlled by either
the analog or digital interface
The default state of the module (as shipped from the
factory) is to be controlled by the analog interface only.
If the digital interface is to be enabled, or the module is
to be controlled only through the digital interface, this
change must be made through the PMBus. These
changes can be made and written to non-volatile
memory on the module so that it is remembered for
subsequent use.
10K
Q2
V
ON/OFF
_
22K
GND
Figure 40. Circuit configuration for using negative
On/Off logic.
Monotonic Start-up and Shutdown
The module has 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 module can start into a prebiased output as long
as the prebias voltage is 0.5V less than the set output
voltage.
Analog Output Voltage Programming
The output voltage of the module is programmable to
any voltage from 0.6dc to 5.5Vdc by connecting a
resistor between the Trim and SIG_GND pins of the
module. Without an external resistor between Trim and
SIG_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, should be as per
the following equation:

 12
Rtrim = 
 kΩ
 (Vo − 0.6)
14
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Rtrim is the external resistor in kΩ
Vo
Vo is the desired output voltage. Table 1 provides
Rtrim values required for some common output
voltages.
Rmargin-down
MODULE
Q2
VIN(+)
VO(+)
Trim
VS+
Rmargin-up
ON/OFF
Rtrim
LOAD
TRIM
Q1
Rtrim
SIG_GND
SIG_GND
VS─
Figure 42. Circuit Configuration for margining
Output voltage.
Figure 41. Circuit configuration for programming
output voltage using an external resistor.
Table 1
VO, set (V)
0.6
0.9
1.0
1.2
1.5
1.8
2.5
3.3
5.0
Rtrim (KΩ)
Open
40
30
20
13.33
10
6.316
4.444
2.727
Digital Output Voltage Margining
Please see the Digital Feature Descriptions
section.
Output Voltage Sequencing
The power module includes a sequencing feature, EZSEQUENCE 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, leave it unconnected.
The voltage applied to the SEQ pin should be scaled
down by the same ratio as used to scale the output
voltage down to the reference voltage of the module.
This is accomplished by an external resistive divider
connected across the sequencing voltage before it is
fed to the SEQ pin as shown in Fig. 43.
DLynx Module
Digital Output Voltage Adjustment
Please see the Digital Feature Descriptions
section.
V
SEQ
20K
Remote Sense
The power module has 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 should not exceed 0.5V.
SEQ
R1=Rtrim
100 pF
SIG_GND
Analog Voltage Margining
Output voltage margining can be implemented in the
module 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 Downloads 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.
LINEAGE POWER
Figure 43. Circuit showing connection of the
sequencing signal to the SEQ pin.
When the scaled down sequencing 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 sequencing voltage must be set higher
than the set-point voltage of the module. The output
voltage follows the sequencing voltage on a one-toone basis. By connecting multiple modules together,
15
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
multiple modules can track their output voltages to the
voltage applied on the SEQ pin.
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.
The Electrical Specifications table specifies the
requirements of the external SYNC signal. If the SYNC
pin is not used, the module should free run at the
default switching frequency. If synchronization is not
being used, connect the SYNC pin to GND.
MODULE
SYNC
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.
Digital Adjustable Overcurrent Warning
Please see the Digital Feature Descriptions
section.
Overtemperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit will
shut down if the overtemperature threshold of
TBDoC(typ) is exceeded at the thermal reference point
Tref .Once the unit goes into thermal shutdown it will
then wait to cool before attempting to restart.
Digital Temperature Status via PMBus
Please see the Digital Feature Descriptions
section.
Digitally Adjustable Output Over and Under
Voltage Protection
Please see the Digital Feature Descriptions
section.
+
─
GND
Figure 44. External source connections to
synchronize switching frequency of the module.
Measuring Output Current, Output Voltage
and Input Voltage
Please see the Digital Feature Descriptions
section.
Dual Layout
Identical dimensions and pin layout of Analog and
Digital Pico DLynx modules permit migration from one
to the other without needing to change the layout. To
support this, 2 separate Trim Resistor locations have
to be provided in the layout. As shown in Fig. 45, for
the digital modules, the resistor is connected between
the TRIM pad and SGND and in the case of the analog
module it is connected between TRIM and GND.
MODULE
(PVX012 / PDT012)
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.
Digitally Adjustable Input Undervoltage
Lockout
Please see the Digital Feature Descriptions
section.
Digitally Adjustable Power Good Thresholds
Please see the Digital Feature Descriptions
section.
Synchronization
The module switching frequency can be synchronized
to a signal with an external frequency within a
specified range. Synchronization can be done by using
the external signal applied to the SYNC pin of the
module as shown in Fig. 44, with the converter being
synchronized by the rising edge of the external signal.
LINEAGE POWER
TRIM
Rtrim1
for
Digital
Rtrim2
for
Analog
SIG_GND
GND(Pin 7)
Figure 45. Connections to support either Analog
or Digital PicoDLynx on the same layout.
Tunable LoopTM
The module has a feature that optimizes transient
TM
response of the module called Tunable Loop .
External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple
and noise (see Figure 38) 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.
16
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
TM
The Tunable Loop allows the user to externally
adjust the voltage control loop to match the filter
network connected to the output of the module. The
Tunable LoopTM is implemented by connecting a series
R-C between the VS+ and TRIM pins of the module,
as shown in Fig. 46. This R-C allows the user to
externally adjust the voltage loop feedback
compensation of the module.
VOUT
VS+
RTune
MODULE
CO
CTune
TRIM
common output voltages in the presence of a 6A to
12A step change (50% of full load), with an input
voltage of 12V.
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 12V.
Table 2. General recommended values of of RTUNE
and CTUNE for Vin=12V and various external
ceramic capacitor combinations.
Co
1x47μF 2x47μF 4x47μF 6x47μF 10x47μF
RTUNE
330
330
CTUNE
100pF
560pF
330
330
1500pF 2200pF
220
10nF
RTrim
SIG_GND
GND
Figure. 46. Circuit diagram showing connection of
RTUME and CTUNE to tune the control loop of the
module.
Recommended values of RTUNE and CTUNE for different
output capacitor combinations are given in Tables 2
and 3. Table 3 shows the recommended values of
RTUNE and CTUNE for different values of ceramic output
capacitors up to 1000uF that might be needed for an
application to meet output ripple and noise
requirements. Selecting RTUNE and CTUNE according to
Table 3 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. Table 3 lists
recommended values of RTUNE and CTUNE in order to
meet 2% output voltage deviation limits for some
LINEAGE POWER
Co
20x47μF
RTUNE
180
CTUNE
6800pF
Table 3. Recommended values of RTUNE and CTUNE
to obtain transient deviation of 2% of Vout for a 6A
step load with Vin=12V.
Vo
Co
RTUNE
5V
3.3V
2.5V
1.8V
CTUNE 1500pF 2700pF 3300pF 5600pF
ΔV
1.2V
0.6V
1x47μF 3x47μF 1x47μF 1x47μF 3x47μF
+
+
+
+
+
5x47μF
330μF 330μF 2x330μF 3x330μF 6x330μF
Polymer Polymer Polymer Polymer Polymer
330
330
270
270
220
180
99mV
58mV
47mV
34mV
10nF
47nF
24mV
12mV
17
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Digital Feature Descriptions
PMBus Interface Capability
address resistor value is outside the range specified in
Table 4, the module will respond to address 127.
Table 4
The 12A Digital Pico DLynxTM power modules have a
PMBus interface that supports both communication
and control. The PMBus Power Management Protocol
Specification can be obtained from www.pmbus.org.
The modules support a subset of version 1.1 of the
specification (see Table 5 for a list of the specific
commands supported). Most module parameters can
be programmed using PMBus and stored as defaults
for later use.
All communication over the module PMBus interface
must support the Packet Error Checking (PEC)
scheme. The PMBus master must generate the correct
PEC byte for all transactions, and check the PEC byte
returned by the module.
The module also supports the SMBALERT response
protocol whereby the module can alert the bus master
if it wants to talk. For more information on the SMBus
alert response protocol, see the System Management
Bus (SMBus) specification.
The module has non-volatile memory that is used to
store configuration settings. Not all settings
programmed into the device are automatically saved
into this non-volatile memory, only those specifically
identified as capable of being stored can be saved
(see Table 5 for which command parameters can be
saved to non-volatile storage).
Digit
0
1
2
3
4
5
6
7
Resistor Value (KΩ)
10
15.4
23.7
36.5
54.9
84.5
130
200
The user must know which I2C addresses are reserved
in a system for special functions and set the address of
the module to avoid interfering with other system
operations. Both 100kHz and 400kHz bus speeds are
supported by the module. Connection for the PMBus
interface should follow the High Power DC
specifications given in section 3.1.3 in the SMBus
specification V2.0 for the 400kHz bus speed or the
Low Power DC specifications in section 3.1.2. The
complete SMBus specification is available from the
SMBus web site, smbus.org.
ADDR1
ADDR0
PMBus Data Format
For commands that set thresholds, voltages or report
such quantities, the module supports the “Linear” data
format among the three data formats supported by
PMBus. The Linear Data Format is a two byte value
with an 11-bit, two’s complement mantissa and a 5-bit,
two’s complement exponent. The format of the two
data bytes is shown below:
RADDR0
RADDR1
SIG_GND
Figure 47. Circuit showing connection of resistors
used to set the PMBus address of the module.
PMBus Enabled On/Off
Data Byte High
7 6 5 4 3
Exponent
MSB
Data Byte Low
2 1 0 7 6 5 4 3 2 1 0
MSB
Mantissa
The value is of the number is then given by
Value = Mantissa x 2
PMBus Addressing
Exponent
The power module can be addressed through the
PMBus using a device address. The module has 64
possible addresses (0 to 63 in decimal) which can be
set using resistors connected from the ADDR0 and
ADDR1 pins to GND. The address is set in the form of
two octal (0 to 7) digits, with each pin setting one digit.
The ADDR1 pin sets the high order digit and ADDR0
sets the low order digit. The resistor values suggested
for each digit are shown in Table 4 (1% tolerance
resistors are recommended). Note that if either
LINEAGE POWER
The module can also be turned on and off via the
PMBus interface. The OPERATION command is used
to actually turn the module on and off via the PMBus,
while the ON_OFF_CONFIG command configures the
combination of analog ON/OFF pin input and PMBus
commands needed to turn the module on and off. Bit
[7] in the OPERATION command data byte enables
the module, with the following functions:
0
1
:
:
Output is disabled
Output is enabled
This module uses the lower five bits of the
ON_OFF_CONFIG data byte to set various ON/OFF
options as follows:
Bit Position
Access
Function
Default Value
4
r/w
PU
1
3
r/w
CMD
0
2
r/w
CPR
1
1
r/w
POL
1
0
r
CPA
1
PU: Sets the default to either operate any time input
power is present or for the ON/OFF to be controlled by
the analog ON/OFF input and the PMBus
18
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
OPERATION command. This bit is used together with
the CP, CMD and ON bits to determine startup.
Bit Value
0
1
Action
Module powers up any time power is
present regardless of state of the analog
ON/OFF pin
Module does not power up until
commanded by the analog ON/OFF pin
and the OPERATION command as
programmed in bits [2:0] of the
ON_OFF_CONFIG register.
CMD: The CMD bit controls how the device responds
to the OPERATION command.
Bit Value
0
1
Action
Module ignores the ON bit in the
OPERATION command
Module responds to the ON bit in the
OPERATION command
CPR: Sets the response of the analog ON/OFF pin.
This bit is used together with the CMD, PU and ON
bits to determine startup.
Bit Value
0
1
Action
Module ignores the analog ON/OFF pin,
i.e. ON/OFF is only controlled through the
PMBUS via the OPERATION command
Module requires the analog ON/OFF pin
to be asserted to start the unit
PMBus Adjustable Soft Start Rise Time
The soft start rise time can be adjusted in the module
via PMBus. When setting this parameter, make sure
that the charging current for output capacitors can be
delivered by the module in addition to any load current
to avoid nuisance tripping of the overcurrent protection
circuitry during startup. The TON_RISE command sets
the rise time in ms, and allows choosing soft start
times between 600μs and 9ms, with possible values
listed in Table 5. Note that the exponent is fixed at -4
(decimal) and the upper two bits of the mantissa are
also fixed at 0.
Table 5
Rise Time
600μs
900μs
1.2ms
1.8ms
2.7ms
4.2ms
6.0ms
9.0ms
LINEAGE POWER
Exponent
11100
11100
11100
11100
11100
11100
11100
11100
Mantissa
00000001010
00000001110
00000010011
00000011101
00000101011
00001000011
00001100000
00010010000
Output Voltage Adjustment Using the PMBus
The VOUT_SCALE_LOOP parameter is important for
a number of PMBus commands related to output
voltage trimming, margining, over/under voltage
protection and the PGOOD thresholds. The output
voltage of the module is set as the combination of the
voltage divider formed by RTrim and a 20kΩ upper
divider resistor inside the module, and the internal
reference voltage of the module. The reference voltage
VREF is nominally set at 600mV, and the output
regulation voltage is then given by
 20000 + RTrim 
VOUT = 
 × VREF
RTrim

Hence the module output voltage is dependent on the
value of RTrim which is connected external to the
module. The information on the output voltage divider
ratio is conveyed to the module through the
VOUT_SCALE_LOOP parameter which is calculated
as follows:
VOUT _ SCALE _ LOOP =
RTrim
20000 + RTrim
The VOUT_SCALE_LOOP parameter is specified
using the “Linear” format and two bytes. The upper five
bits [7:3] of the high byte are used to set the exponent
which is fixed at –9 (decimal). The remaining three bits
of the high byte [2:0] and the eight bits of the lower
byte are used for the mantissa. The default value of
the mantissa is 00100000000 corresponding to 256
(decimal), corresponding to a divider ratio of 0.5. The
maximum value of the mantissa is 512 corresponding
to a divider ratio of 1. Note that the resolution of the
VOUT_SCALE_LOOP command is 0.2%.
When PMBus commands are used to trim or margin
the output voltage, the value of VREF is what is
changed inside the module, which in turn changes the
regulated output voltage of the module.
The nominal output voltage of the module can be
adjusted with a minimum step size of 0.4% over a
±25% range from nominal using the VOUT_TRIM
command over the PMBus.
The VOUT_TRIM command is used to apply a fixed
offset voltage to the output voltage command value
using the “Linear” mode with the exponent fixed at –10
(decimal). The value of the offset voltage is given by
VOUT ( offset ) = VOUT _ TRIM × 2 −10
This offset voltage is added to the voltage set through
the divider ratio and nominal VREF to produce the
trimmed output voltage. The valid range in two’s
complement for this command is –4000h to 3999h.
The high order two bits of the high byte must both be
either 0 or 1. If a value outside of the +/-25%
adjustment range is given with this command, the
module will set it’s output voltage to the nominal value
(as if VOUT_TRIM had been set to 0), assert
19
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
SMBALRT#, set the CML bit in STATUS_BYTE and
the invalid data bit in STATUS_CML.
PMBus Adjustable Output Over and Under
Voltage Protection
Output Voltage Margining Using the PMBus
The module has output over and under voltage
protection capability. The PMBus command
VOUT_OV_FAULT_LIMIT is used to set the output
over voltage threshold from four possible values:
108%, 110%, 112% or 115% of the nominal output
voltage. The command VOUT_UV_FAULT_LIMIT sets
the threshold that causes an output under voltage fault
and can also be selected from four possible values:
92%, 90%, 88% or 85%. The default values are 112%
and 88% of nominal output voltage. Both commands
use two data bytes formatted as two’s complement
binary integers. The “Linear” mode is used with the
exponent fixed to –10 (decimal) and the effective over
or under voltage trip points given by:
The module can also have its output voltage margined
via PMBus commands. The command
VOUT_MARGIN_HIGH sets the margin high voltage,
while the command VOUT_MARGIN_LOW sets the
margin low voltage. Both the VOUT_MARGIN_HIGH
and VOUT_MARGIN_LOW commands use the
“Linear” mode with the exponent fixed at –10
(decimal). Two bytes are used for the mantissa with
the upper bit [7] of the high byte fixed at 0. The actual
margined output voltage is a combination of the
VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW and
the VOUT_TRIM values as shown below.
VOUT( MH ) =
(VOUT _ MARGIN_ HIGH + VOUT _ TRIM) × 2
VOUT ( ML) =
−10
(VOUT _ MARGIN _ LOW + VOUT _ TRIM ) × 2 −10
Note that the sum of the margin and trim voltages
cannot be outside the ±25% window around the
nominal output voltage. The data associated with
VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW
can be stored to non-volatile memory using the
STORE_DEFAULT_ALL command.
The module is commanded to go to the margined high
or low voltages using the OPERATION command. Bits
[5:2] are used to enable margining as follows:
00XX
0101
0110
1001
1010
:
:
:
:
:
Margin Off
Margin Low (Ignore Fault)
Margin Low (Act on Fault)
Margin High (Ignore Fault)
Margin High (Act on Fault)
PMBus Adjustable Overcurrent Warning
The module can provide an overcurrent warning via
the PMBus. The threshold for the overcurrent warning
can be set using the parameter
IOUT_OC_WARN_LIMIT. This command uses the
“Linear” data format with a two byte data word where
the upper five bits [7:3] of the high byte represent the
exponent and the remaining three bits of the high byte
[2:0] and the eight bits in the low byte represent the
mantissa. The exponent is fixed at –1 (decimal). The
upper six bits of the mantissa are fixed at 0 while the
lower five bits are programmable with a default value
of TBD (decimal). The resolution of this warning limit is
500mA. The value of the IOUT_OC_WARN_LIMIT can
be stored to non-volatile memory using the
STORE_DEFAULT_ALL command.
Temperature Status via PMBus
The module can provide information related to
temperature of the module through the
STATUS_TEMPERATURE command. The command
returns information about whether the pre-set over
temperature fault threshold and/or the warning
threshold have been exceeded.
LINEAGE POWER
VOUT (OV _ REQ) = (VOUT _ OV _ FAULT _ LIMIT) × 2 −10
VOUT (UV _ REQ) = (VOUT _ UV _ FAULT _ LIMIT) × 2 −10
Values within the supported range for over and
undervoltage detection thresholds will be set to the
nearest fixed percentage. Note that the correct value
for VOUT_SCALE_LOOP must be set in the module
for the correct over or under voltage trip points to be
calculated.
In addition to adjustable output voltage protection, the
12A Digital Pico DLynxTM module can also be
programmed for the response to the fault. The
VOUT_OV_FAULT RESPONSE and
VOUT_UV_FAULT_RESPONSE commands specify
the response to the fault. Possible choices are shown
below.
1. Continue operation without interruption
2. Continue for four switching cycles and then
shut down if the fault is still present, followed
by no restart or continuous restart (can select
either option)
3. Immediate shut down followed by no restart
or continuous restart (can select either
option).
4. Module output is disabled when the fault is
present and the output is enabled when the
fault no longer exists.
Note that separate response choices are possible for
output over voltage or under voltage faults.
PMBus Adjustable Input Undervoltage
Lockout
The module allows adjustment of the input under
voltage lockout and hysteresis. The command VIN_ON
allows setting the input voltage turn on threshold, while
the VIN_OFF command sets the input voltage turn off
threshold. For the VIN_ON command, possible values
are 2.75V, and 3V to 14V in 0.5V steps. For the
VIN_OFF command, possible values are 2.5V to 14V
in 0.5V steps. If other values are entered for either
command, they will be mapped to the closest of the
allowed values.
20
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Power Good
The module provides a Power Good (PGOOD) signal
that is implemented with an open-drain output to
indicate that the output voltage is within the regulation
limits of the power module. The PGOOD signal will be
de-asserted to a low state if any condition such as
overtemperature, overcurrent or loss of regulation
occurs that would result in the output voltage going
outside the specified thresholds. The PGOOD
thresholds are user selectable via the PMBus (the
default values are as shown in the Feature
Specifications Section). Each threshold is set up
symmetrically above and below the nominal value. The
POWER_GOOD_ON command sets the output
voltage level above which PGOOD is asserted (lower
threshold). For example, with a 1.2V nominal output
voltage, the POWER_GOOD_ON threshold can set
the lower threshold to 1.14 or 1.1V. Doing this will
automatically set the upper thresholds to 1.26 or 1.3V.
The POWER_GOOD_OFF command sets the level
below which the PGOOD command is de-asserted.
This command also sets two thresholds symmetrically
placed around the nominal output voltage. Normally,
the POWER_GOOD_ON threshold is set higher than
the POWER_GOOD_OFF threshold.
Both POWER_GOOD_ON and POWER_GOOD_OFF
commands use the “Linear” format with the exponent
fixed at –10 (decimal). The two thresholds are given by
VOUT ( PGOOD _ ON ) = ( POWER _ GOOD _ ON ) × 2 −10
VOUT ( PGOOD _ OFF ) = ( POWER _ GOOD _ OFF ) × 2 −10
Both commands use two data bytes with bit [7] of the
high byte fixed at 0, while the remaining bits are r/w
and used to set the mantissa using two’s complement
representation. Both commands also use the
VOUT_SCALE_LOOP parameter so it must be set
correctly. The default value of POWER_GOOD_ON is
set at 1.1035V and that of the POWER_GOOD_OFF is
set at 1.08V. The values associated with these
commands can be stored in non-volatile memory using
the STORE_DEFAULT_ALL command.
The PGOOD terminal can be connected through a
pullup resistor (suggested value 100KΩ) to a source of
5VDC or lower.
Measurement of Output Current, Output
Voltage and Input Voltage
The module is capable of measuring key module
parameters such as output current and voltage and
input voltage and providing this information through the
PMBus interface. Roughly every 200μs, the module
makes 16 measurements each of output current,
voltage and input voltage. Average values of of these
16 measurements are then calculated and placed in
the appropriate registers. The values in the registers
can then be read using the PMBus interface.
Measuring Output Current Using the PMBus
LINEAGE POWER
The module measures current by using the inductor
winding resistance as a current sense element. The
inductor winding resistance is then the current gain
factor used to scale the measured voltage into a
current reading. This gain factor is the argument of the
IOUT_CAL_GAIN command, and consists of two bytes
in the linear data format. The exponent uses the upper
five bits [7:3] of the high data byte in two-s
complement format and is fixed at –15 (decimal). The
remaining 11 bits in two’s complement binary format
represent the mantissa. During manufacture, each
module is calibrated by measuring and storing the
current gain factor into non-volatile storage.
The current measurement accuracy is also improved
by each module being calibrated during manufacture
with the offset in the current reading. The
IOUT_CAL_OFFSET command is used to store and
read the current offset. The argument for this
command consists of two bytes composed of a 5-bit
exponent (fixed at -4d) and a 11-bit mantissa. This
command has a resolution of 62.5mA and a range of
-4000mA to +3937.5mA.
The READ_IOUT command provides module average
output current information. This command only
supports positive or current sourced from the module.
If the converter is sinking current a reading of 0 is
provided. The READ_IOUT command returns two
bytes of data in the linear data format. The exponent
uses the upper five bits [7:3] of the high data byte in
two-s complement format and is fixed at –4 (decimal).
The remaining 11 bits in two’s complement binary
th
format represent the mantissa with the 11 bit fixed at
0 since only positive numbers are considered valid.
Note that the current reading provided by the module
is not corrected for temperature. The temperature
corrected current reading for module temperature
TModule can be estimated using the following equation
TBD
Measuring Output Voltage Using the PMBus
The module can provide output voltage information
using the READ_VOUT command. The command
returns two bytes of data all representing the mantissa
while the exponent is fixed at -10 (decimal).
During manufacture of the module, offset and gain
correction values are written into the non-volatile
memory of the module. The command
VOUT_CAL_OFFSET can be used to read and/or
write the offset (two bytes consisting of a 16-bit
mantissa in two’s complement format) while the
exponent is always fixed at -10 (decimal). The allowed
range for this offset correction is -125 to 124mV. The
command VOUT_CAL_GAIN can be used to read
and/or write the gain correction - two bytes consisting
of a five-bit exponent (fixed at -8) and a 11-bit
mantissa. The range of this correction factor is -0.125
21
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
to +0.121, with a resolution of 0.004. The corrected
output voltage reading is then given by:
VOUT ( Final _ Re ading) =
[VOUT ( Initial _ Re ading) × (1 + VOUT _ CAL _ GAIN )]
+ VOUT _ CAL _ OFFSET
Measuring Input Voltage Using the PMBus
The module can provide output voltage information
using the READ_VIN command. The command returns
two bytes of data in the linear format. The upper five
bits [7:3] of the high data form the two’s complement
representation of the mantissa which is fixed at –5
(decimal). The remaining 11 bits are used for two’s
complement representation of the mantissa, with the
th
11 bit fixed at zero since only positive numbers are
valid.
During module manufacture, offset and gain correction
values are written into the non-volatile memory of the
module. The command VIN_CAL_OFFSET can be
used to read and/or write the offset - two bytes
consisting of a five-bit exponent (fixed at -5) and a11bit mantissa in two’s complement format. The allowed
range for this offset correction is -2to 1.968V, and the
resolution is 32mV. The command VIN_CAL_GAIN
can be used to read and/or write the gain correction two bytes consisting of a five-bit exponent (fixed at -8)
and a 11-bit mantissa. The range of this correction
factor is -0.125 to +0.121, with a resolution of 0.004.
The corrected output voltage reading is then given by:
VIN ( Final _ Re ading) =
[VIN ( Initial _ Re ading) × (1 + VIN _ CAL _ GAIN)]
+ VIN _ CAL _ OFFSET
Reading the Status of the Module using the
PMBus
The module supports a number of status information
commands implemented in PMBus. However, not all
features are supported in these commands. A 1 in the
bit position indicates the fault that is flagged.
STATUS_BYTE : Returns one byte of information with
a summary of the most critical device faults.
Bit
Default
Flag
Position
Value
7
X
0
6
OFF
0
5
VOUT Overvoltage
0
4
IOUT Overcurrent
0
3
VIN Undervoltage
0
2
Temperature
0
1
CML (Comm. Memory Fault)
0
0
None of the above
0
STATUS_WORD : Returns two bytes of information
with a summary of the module’s fault/warning
conditions.
LINEAGE POWER
Low Byte
Bit
Position
7
6
5
4
3
2
1
0
Flag
X
OFF
VOUT Overvoltage
IOUT Overcurrent
VIN Undervoltage
Temperature
CML (Comm. Memory Fault)
None of the above
Default
Value
0
0
0
0
0
0
0
0
High Byte
Bit
Position
7
6
5
4
3
2
1
0
Flag
VOUT fault or warning
IOUT fault or warning
X
X
POWER_GOOD# (is negated)
X
X
X
Default
Value
0
0
0
0
0
0
0
0
STATUS_VOUT : Returns one byte of information
relating to the status of the module’s output voltage
related faults.
Bit
Default
Flag
Position
Value
7
VOUT OV Fault
0
6
X
0
5
X
0
4
VOUT UV Fault
0
3
X
0
2
X
0
1
X
0
0
X
0
STATUS_IOUT : Returns one byte of information
relating to the status of the module’s output voltage
related faults.
Bit
Position
7
6
5
4
3
2
1
0
Flag
IOUT OC Fault
X
IOUT OC Warning
X
X
X
X
X
Default
Value
0
0
0
0
0
0
0
0
STATUS_TEMPERATURE : Returns one byte of
information relating to the status of the module’s
temperature related faults.
Bit
Position
7
6
5
Flag
OT Fault
OT Warning
X
Default
Value
0
0
0
22
Preliminary Data Sheet
February 1, 2011
4
3
2
1
0
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
X
X
X
X
X
0
0
0
0
0
STATUS_CML : Returns one byte of information
relating to the status of the module’s communication
related faults.
Bit
Position
7
6
5
4
3
2
1
0
Flag
Invalid/Unsupported Command
Invalid/Unsupported Command
Packet Error Check Failed
X
X
X
Other Communication Fault
X
Default
Value
0
0
0
0
0
0
0
0
MFR_SPECIFIC_00 : Returns information related to
the type of module and revision number. Bits [7:2] in
the Low Byte indicate the module type (000000
corresponds to the PDT012 series of module), while
bits [7:3] indicate the revision number of the module.
Low Byte
Bit
Position
7:2
1:0
Flag
Module Name
Reserved
Default
Value
000000
10
High Byte
Bit
Position
7:3
2:0
Flag
Module Revision Number
Reserved
LINEAGE POWER
Default
Value
None
000
23
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Summary of Supported PMBus Commands
Please refer to the PMBus 1.1 specification for more details of these commands.
Table 5
Non-Volatile
Memory
Storage
Hex
Code
Command
01
OPERATION
02
ON_OFF_CONFIG
03
CLEAR_FAULTS
11
STORE_DEFAULT_ALL
12
RESTORE_DEFAULT_ALL
20
VOUT_MODE
The module has MODE set to Linear and Exponent set to -10. These values
cannot be changed
22
VOUT_TRIM
Apply a fixed offset voltage to the output voltage command value
YES
25
VOUT_MARGIN_HIGH
Sets the target voltage for margining the output high
YES
26
VOUT_MARGIN_LOW
Sets the target voltage for margining the output low
YES
29
VOUT_SCALE_LOOP
Sets the scaling of the output voltage – equal to the feedback resistor
divider ratio
YES
35
VIN_ON
Sets the value of input voltage at which the module turns on
YES
36
VIN_OFF
Brief Description
Turn Module on or off. Also used to margin the output voltage
Configures the ON/OFF functionality as a combination of analog ON/OFF
pin and PMBus commands
YES
Clear any fault bits that may have been set, also releases the SMBALERT#
signal if the device has been asserting it.
Stores all current storable register settings in module non-volatile memory
as new defaults on power up
Restores all of the storable register settings from module non-volatile
memory
Sets the value of input voltage at which the module turns off
YES
YES
38
IOUT_CAL_GAIN
Returns the value of the gain correction term used to correct the measured
output current
39
IOUT_CAL_OFFSET
Returns the value of the offset correction term used to correct the measured
output current
YES
40
VOUT_OV_FAULT_LIMIT
Sets the voltage level for an output overvoltage fault
YES
41
44
45
Instructs the module on what action to take in response to a output
VOUT_OV_FAULT_RESPONSE
overvoltage fault
VOUT_UV_FAULT_LIMIT
Sets the voltage level for an output undervoltage fault
Instructs the module on what action to take in response to a output
VOUT_UV_FAULT_RESPONSE
undervoltage fault
Sets the output overcurrent warning level in A
YES
YES
YES
4A
IOUT_OC_WARN_LIMIT
5E
POWER_GOOD_ON
Sets the output voltage level at which the PGOOD pin is asserted high
YES
5F
POWER_GOOD_OFF
Sets the output voltage level at which the PGOOD pin is de-asserted low
YES
61
TON_RISE
Sets the rise time of the output voltage during startup
YES
78
STATUS_BYTE
Returns one byte of information with a summary of the most critical module
faults
79
STATUS_WORD
Returns two bytes of information with a summary of the module’s
fault/warning conditions
7A
STATUS_VOUT
Returns one byte of information with the status of the module’s output
voltage related faults
7B
STATUS_IOUT
Returns one byte of information with the status of the module’s output
current related faults
7D
STATUS_TEMPERATURE
7E
STATUS_CML
88
READ_VIN
8B
READ_VOUT
Returns the value of the output voltage of the module
8C
READ_IOUT
Returns the value of the output current of the module
LINEAGE POWER
YES
Returns one byte of information with the status of the module’s temperature
related faults
Returns one byte of information with the status of the module’s
communication related faults
Returns the value of the input voltage applied to the module
24
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Summary of PMBus Commands Supported (cont.)
Table 5 (continued)
Hex
Code
Command
98
PMBUS_REVISION
A0
MFR_VIN_MIN
A1
MFR_VIN_MAX
A4
MFR_VOUT_MIN
D0
MFR_SPECIFIC_00
D4
VOUT_CAL_OFFSET
D5
Brief Description
Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read
only)
Returns the minimum input voltage the module is specified to operate at (read
only)
Returns the maximum input voltage the module is specified to operate at (read
only)
Returns the minimum output voltage possible from the module (read only)
Non-Volatile
Memory
Storage
YES
YES
YES
YES
Returns module name and revision number information (read only)
YES
Applies an offset to the READ_VOUT command results to calibrate out offset
errors in module measurements of the output voltage (between -125mV and
+124mV)
YES
VOUT_CAL_GAIN
Applies a gain correction to the READ_VOUT command results to calibrate out
gain errors in module measurements of the output voltage (between -0.125 and
0.121)
YES
D6
VIN_CAL_OFFSET
Applies an offset correction to the READ_VIN command results to calibrate out
offset errors in module measurements of the input voltage (between -2V and
+1.968V)
YES
D7
VIN_CAL_GAIN
Applies a gain correction to the READ_VIN command results to calibrate out gain
errors in module measurements of the input voltage (between -0.125 and 0.121)
YES
LINEAGE POWER
25
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
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 48. The preferred airflow direction
for the module is in Figure 49.
The thermal reference points, Tref used in the
specifications are also shown in Figure 49. For reliable
operation the temperatures at these points should not
exceed 120oC. 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.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
12.7_
(0.50)
Probe Location
for measuring
airflow and
ambient
temperature
Figure 49. Preferred airflow direction and location
of hot-spot of the module (Tref).
Air
flow
Figure 48. Thermal Test Setup.
LINEAGE POWER
26
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Example Application Circuit
Requirements:
Vin:
12V
Vout:
1.8V
Iout:
9A max., worst case load transient is from 6A to 9A
ΔVout:
Vin, ripple
1.5% of Vout (27mV) for worst case load transient
1.5% of Vin (180mV, p-p)
Vin+
VIN
Vout+
VOUT
VS+
PGOOD
RTUNE
MODULE
SEQ
CI2
CTUNE
CLK
TRIM
DATA
ADDR0
SMBALRT#
ADDR1
CI1
Q1
ON/OFF
CO1
CO2
RTrim
RADDR1
RADDR0
SIG_GND
GND VS-
GND
CI1
2x22μF/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)
CI2
47μF/16V bulk electrolytic
CO1
2 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)
CO2
CTune
RTune
1 x 330μF/6.3V Polymer (e.g. Sanyo Poscap)
3300pF ceramic capacitor (can be 1206, 0805 or 0603 size)
270 ohms SMT resistor (can be 1206, 0805 or 0603 size)
RTrim
10kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
LINEAGE POWER
27
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Mechanical Outline
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
PIN
FUNCTION
PIN
FUNCTION
1
ON/OFF
10
PGOOD
2
VIN
11
SYNC
3
GND
12
VS-
4
VOUT
13
SIG. GND
5
VS+ (SENSE)
14
SMBALERT
6
TRIM
15
DATA
7
GND
16
ADDR0
8
CLK
17
ADDR1
9
SEQ
PIN 7
LINEAGE POWER
28
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Recommended Pad Layout
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
7
PIN
1
2
3
4
5
6
7
8
9
LINEAGE POWER
FUNCTION
ON/OFF
VIN
GND
VOUT
VS+ (SENSE)
TRIM
GND
CLK
SEQ
PIN
10
11
12
13
14
15
16
17
FUNCTION
PGOOD
SYNC
VSSIG_GND
SMBALERT
DATA
ADDR0
ADDR1
29
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Packaging Details
The 12V Digital Pico DLynxTM 12A modules are supplied in tape & reel as standard. Modules are shipped in quantities
of TBD modules per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions:
Inside Dimensions:
Tape Width:
LINEAGE POWER
330.2 mm (13.00)
177.8 mm (7.00”)
24.00 mm (0.945”)
30
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Preliminary Data Sheet
February 1, 2011
Surface Mount Information
Pick and Place
TM
The 12A Digital Pico DLynx 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
o
temperatures of up to 300 C. The label also carries
product information such as product code, serial
number and the location of manufacture.
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.
300
Nozzle Recommendations
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.
Lead Free Soldering
The 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
Peak Temp 260°C
Reflow Temp (°C)
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.
Per J-STD-020 Rev. C
250
200
150
* Min. Time Above 235°C
15 Seconds
Heating Zone
1°C/Second
Cooling
Zone
*Time Above 217°C
60 Seconds
100
50
0
Reflow Time (Seconds)
Figure 50. 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).
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. 50. Soldering outside of the
recommended profile requires testing to verify results
and performance.
MSL Rating
The 12A Digital Pico DLynx
rating of TBD.
TM
modules have a MSL
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount
LINEAGE POWER
31
Preliminary Data Sheet
February 1, 2011
12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 6. Device Codes
Device Code
Input
Voltage Range
Output
Voltage
Output
Current
On/Off
Logic
Sequencing
Comcodes
PDT012A0X3-SRZ
3 – 14.4Vdc
0.6 – 5.5Vdc
12A
Negative
Yes
CC109159661
PDT012A0X43-SRZ
3 – 14.4Vdc
0.6 – 5.5Vdc
12A
Positive
Yes
CC109159678
-Z refers to RoHS compliant parts
Table 7. Coding Scheme
Package Family
Identifier
Sequencing Output
Option
current
P
D
T
012A0
P=Pico
D=Dlynx
Digital
T=with EZ
Sequence
12A
V=
DLynx
Analog.
X=without
sequencing
U=Micro
M=Mega
G=Giga
Output
voltage
On/Off
logic
Remote
Sense
X
4
3
-SR
-D
Z
3=
Remote
Sense
S=
Surface
Mount
D = 105°C
operating
ambient,
40G
operating
shock as
per MIL
Std 810F
Z = ROHS6
X=
4=
programm positive
able output
No entry
=
negative
Options
R=
Tape &
Reel
ROHS
Compliance
Asia-Pacific Headquarters
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: [email protected]
Europe, Middle-East and Africa Headquarters
Tel: +49.89.878067-280
India Headquarters
Tel: +91.80.28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
application. No rights under any patent accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.
© 2011 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.
LINEAGE POWER
32
Document No: DS10-009 ver. 0.27
PDF name: PDT012A0X.pdf