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Data Sheet

January 11, 2012

20A Analog Micro DLynx

: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A Output Current

UL is a registered trademark of Underwriters Laboratories, Inc.

†

CSA is a registered trademark of Canadian Standards Association.

‡

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

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

Document No: DS10-011 ver.1.24

PDF name: UVT020A0X.

Features

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

versions)

 Compatible in a Pb-free or SnPb reflow

environment (Z versions)

 Compliant to IPC-9592 (September 2008),

Category 2, Class II

 DOSA based

 Wide Input voltage range (3Vdc-14.4Vdc)

 Output voltage programmable from 0.6Vdc to

5.5Vdc via external resistor

 Tunable Loop

to optimize dynamic output

voltage response

 Power Good signal

 Fixed switching frequency with capability of

external synchronization

 Output over current protection (non-latching)

 Over temperature protection

 Remote On/Off

 Ability to sink and source current

 Cost efficient open frame design

 Small size: 20.32 mm x 11.43 mm x 8.5 mm

(0.8 in x 0.45 in x 0.334 in)

 Wide operating temperature range [-40°C to 85°C]

 UL* 60950-1 2

Ed. Recognized, CSA

†

C22.2

No. 60950-1-07 Certified, and VDE

‡

(EN60950-1

Ed.) Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

Applications

 Distributed power architectures

 Intermediate bus voltage applications

 Telecommunications equipment

 Servers and storage applications

 Networking equipment

 Industrial equipment

Description

The 20A Analog Micro DLynx

power modules are non-isolated dc-dc converters that can deliver up to 20A of

output current. These modules operate over a wide range of input voltage (V

= 3Vdc-14.4Vdc) and provide a

precisely regulated output 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. The Tunable Loop

feature allows the user to optimize the dynamic response of the converter to match the load with reduced amount of

output capacitance leading to savings on cost and PWB area.

TRIM

VOUT

VS+

CTUNE

GND

RTUNE

RTrim

VIN

Cin

Vout+

in+

ON/OFF

PGOOD

SEQ

MODULE

SIG_GND

VS-

GND SYNC

RoHS Compliant

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 2

Absolute Maximum Ratings

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

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

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

extended periods can adversely affect the device reliability.

Parameter Device Symbol Min Max Unit

Input Voltage All VIN -0.3 15 Vdc

Continuous

Operating Ambient Temperature All TA -40 85 °C

(see Thermal Considerations section)

Storage Temperature All Tstg -55 125 °C

Electrical Specifications

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

conditions.

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage All VIN 3

⎯ 14.4 Vdc

Maximum Input Current All IIN,max 19 Adc

(VIN=4.5V to 14V, IO=IO, max )

Input No Load Current

(VIN = 12.0Vdc, IO = 0, module enabled)

VO,set = 0.6 Vdc IIN,No load 69 mA

VO,set = 5Vdc IIN,No load 134 mA

Input Stand-by Current

(VIN = 12.0Vdc, module disabled) All IIN,stand-by 16.4 mA

Inrush Transient All I2t 1 A2s

Input Reflected Ripple Current, peak-to-peak

(5Hz to 20MHz, 1μH source impedance; VIN =0 to

14V, IO= IOmax ; See Test Configurations)

All 50 mAp-p

Input Ripple Rejection (120Hz) All -64 dB

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 3

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point (with 0.1% tolerance for

external resistor used to set output voltage) All VO, set -1.0 +1.0 % VO, set

Output Voltage (Over all operating input voltage, resistive

load, and temperature conditions until end of life) All VO, set -3.0 ⎯ +3.0 % VO, set

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 5.5 Vdc

Remote Sense Range All 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

⎯ 10 mV

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

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) All ⎯ 50 100 mVpk-pk

RMS (5Hz to 20MHz bandwidth) All 20 38 mVrms

External Capacitance1

Without the Tunable LoopTM

ESR ≥ 1 mΩ All CO, max 2x47 ⎯ 2x47 μF

With the Tunable LoopTM

ESR ≥0.15 mΩ All CO, max 2x47 ⎯ 1000 μF

ESR ≥ 10 mΩ All CO, max 2x47 ⎯ 10000 μF

Output Current (in either sink or source mode) All Io 0 20 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 1.4 Arms

(VO≤250mV) ( Hiccup Mode )

Efficiency VO,set = 0.6Vdc η 79.2 %

VIN= 12Vdc, TA=25°C VO, set = 1.2Vdc η 87.1 %

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

O,set = 1.8Vdc η 90.4 %

O,set = 2.5Vdc η 92.6 %

O,set = 3.3Vdc η 93.8 %

O,set = 5.0Vdc η 95.2 %

Switching Frequency All fsw ⎯ 500 ⎯ kHz

1 External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as

getting the best transient response. See the Tunable LoopTM section for details.

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 4

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Frequency Synchronization All

Synchronization Frequency Range All 425 600 kHz

High-Level Input Voltage All 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 Device Min Typ Max Unit

Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2

Method 1 Case 3 All 15,455,614 Hours

Weight

⎯ 4.54(0.16) ⎯ g (oz.)

Feature Specifications

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

conditions. See Feature Descriptions for additional information.

Parameter Device Symbol Min Typ Max Unit

On/Off Signal Interface

(VIN=VIN, min to VIN, max ; open collector or equivalent,

Signal referenced to GND)

Device is with suffix “4” – Positive Logic (See Ordering

Information)

Logic High (Module ON)

Input High Current All IIH ⎯ 1 mA

Input High Voltage All VIH 2 ⎯ VIN,max V

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 ― V

IN, max Vdc

Logic Low (Module ON)

Input low Current All IIL ― ― 10 μA

Input Low Voltage All VIL -0.2 ― 0.6 Vdc

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 5

Feature Specifications (cont.)

Parameter Device Symbol Min Typ Max Units

Turn-On Delay and Rise Times

(VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state)

Case 1: On/Off input is enabled and then input power is

applied (delay from instant at which VIN = VIN, min until Vo =

10% of Vo, set)

All Tdelay ― 1.2 ― msec

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

then the On/Off input is enabled (delay from instant at

which Von/Off is enabled until Vo = 10% of Vo, set)

All Tdelay ― 0.8 ― msec

Output voltage Rise time (time for Vo to rise from

10% of Vo, set to 90% of Vo, set

)

All Trise ― 2.7 ― msec

Output voltage overshoot (TA = 25oC 3.0 % VO, set

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

With or without maximum external capacitance

Over Temperature Protection All Tref 120 °C

(See Thermal Considerations section)

Tracking Accuracy (Power-Up: 2V/ms) All VSEQ –Vo 100 mV

(Power-Down: 2V/ms) All VSEQ –Vo 100 mV

(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)

Input Undervoltage Lockout

Turn-on Threshold All 3.25 Vdc

Turn-off Threshold All 2.6 Vdc

Hysteresis All

0.25 Vdc

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 All 50 Ω

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 6

Characteristic Curves

The following figures provide typical characteristics for the 20A Analog Micro DLynxTM at 0.6Vo and 25oC

EFFICIENCY, η (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Figure 1. Converter Efficiency versus Output Current. Figure 2. Derating Output Current versus Ambient

Temperature and Airflow.

OUTPUT VOLTAGE

VO (V) (10mV/div)

OUTPUT

CURRENT

OUTPUT

VOLTAGE

IO (A) (10Adiv) VO (V) (10mV/div)

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 3. Typical output ripple and noise (CO=2x47μF

ceramic, VIN = 12V, Io = Io,max, ).

Figure 4. Transient Response to Dynamic Load

Change from 50% to 100% at 12Vin, Cout= 1x47uF

+11x330uF CTune=47nF

RTune=178 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

VO (V) (200mV/div) VON/OFF (V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (200mV/div) VIN (V) (5V/div)

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

Figure 5. Typical Start-up Using On/Off Voltage (Io =

Io,max).

Figure 6. Typical Start-up Using Input Voltage (VIN =

12V, Io = Io,max).

0 5 10 15 20

Vin=3.3V

Vin=14V

Vin=12V

55 65 75 85 95 105

0.5m/s

(100LFM)

1.5m/s

(300LFM)

1m/s

(

200LFM

)

2m/s

(400LFM)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 7

Characteristic Curves

The following figures provide typical characteristics for the 20A Analog Micro DLynxTM at 1.2Vo and 25oC.

EFFICIENCY, η (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Figure 7. Converter Efficiency versus Output Current. Figure 8. Derating Output Current versus Ambient

Temperature and Airflow.

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT

CURRENT

OUTPUT

VOLTAGE

IO (A) (10Adiv) VO (V) (20mV/div)

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 9. Typical output ripple and noise (CO=2x47μF

ceramic, VIN = 12V, Io = Io,max, ).

Figure 10. Transient Response to Dynamic Load

Change from 50% to 100% at 12Vin, Cout= 1x47uF

+5x330uF

CTune=10nF & RTune=178 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

VO (V) (500mV/div) VON/OFF (V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (500mV/div) VIN (V) (5V/div)

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

Figure 1. Typical Start-up Using On/Off Voltage (Io =

Io,max).

Figure 12. Typical Start-up Using Input Voltage (VIN =

12V, Io = Io,max).

0 5 10 15 20

Vin=3.3V

Vin=14V

Vin=12V

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 8

Characteristic Curves

The following figures provide typical characteristics for the 20A Analog Micro DLynxTM at 1.8Vo and 25oC.

EFFICIENCY, η (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient

Temperature and Airflow.

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT

CURRENT

OUTPUT

VOLTAGE

IO (A) (10Adiv) VO (V) (20mV/div)

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 15. Typical output ripple and noise (CO=2X47μF

ceramic, VIN = 12V, Io = Io,max, ).

Figure 16. Transient Response to Dynamic Load

Change from 50% to 100% at 12Vin, Cout= 2x47uF

+3x330uF, CTune=5600pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

VO (V) (500mV/div) VON/OFF (V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (500mV/div) VIN (V) (5V/div)

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

Figure 17. Typical Start-up Using On/Off Voltage (Io =

Io,max).

Figure 18. Typical Start-up Using Input Voltage (VIN =

12V, Io = Io,max).

0 5 10 15 20

Vin=3.3V

Vin=14V

Vin=12V

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 9

Characteristic Curves

The following figures provide typical characteristics for the 20A Analog Micro DLynxTM at 2.5Vo and 25oC.

EFFICIENCY, η (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Figure 19. Converter Efficiency versus Output Current. Figure 20. Derating Output Current versus Ambient

Temperature and Airflow.

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT

CURRENT

OUTPUT

VOLTAGE

IO (A) (10Adiv) VO (V) (20mV/div)

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 21. Typical output ripple and noise (CO=2x47μF

ceramic, VIN = 12V, Io = Io,max, ).

Figure 22. Transient Response to Dynamic Load

Change from 50% to 100% at 12Vin, Cout= 2x47uF

+2x330uF, CTune=3300pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

VO (V) (1V/div) VON/OFF (V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (1V/div) VIN (V) (5V/div)

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

Figure 23. Typical Start-up Using On/Off Voltage (Io =

Io,max).

Figure 24. Typical Start-up Using Input Voltage (VIN =

12V, Io = Io,max).

100

0 5 10 15 20

Vin=4.5V Vin=14V

Vin=12V

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 10

Characteristic Curves

The following figures provide typical characteristics for the 20A Analog Micro DLynxTM at 3.3Vo and 25oC.

EFFICIENCY, η (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Figure 25. Converter Efficiency versus Output Current. Figure 26. Derating Output Current versus Ambient

Temperature and Airflow.

OUTPUT VOLTAGE

VO (V) (50mV/div)

OUTPUT

CURRENT

OUTPUT

VOLTAGE

IO (A) (10Adiv) VO (V) (50mV/div)

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 27. Typical output ripple and noise (CO=2x47μF

ceramic, VIN = 12V, Io = Io,max, ).

Figure 28 Transient Response to Dynamic Load

Change from 50% to 100% at 12Vin, Cout= 5x47uF

+1x330uF, CTune=2200pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

VO (V) (1V/div) VON/OFF (V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (1V/div) VIN (V) (5V/div)

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

Figure 29. Typical Start-up Using On/Off Voltage (Io=

Io,max).

Figure 30. Typical Start-up Using Input Voltage (VIN =

12V, Io = Io,max).

100

0 5 10 15 20

Vin=4.5V

Vin=14V

Vin=12V

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 11

Characteristic Curves

The following figures provide typical characteristics for the 20A Analog Micro DLynxTM at 5Vo and 25oC.

EFFICIENCY, η (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Figure 31. Converter Efficiency versus Output Current. Figure 32. Derating Output Current versus Ambient

Temperature and Airflow.

OUTPUT VOLTAGE

VO (V) (50mV/div)

OUTPUT

CURRENT

OUTPUT

VOLTAGE

IO (A) (10Adiv) VO (V) (50mV/div)

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 33. Typical output ripple and noise (CO=2x47μF

ceramic, VIN = 12V, Io = Io,max, ).

Figure 34. Transient Response to Dynamic Load

Change from 50% to 100% at 12Vin, Cout= 8x47uF,

CTune=1500pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

VO (V) (2V/div) VON/OFF (V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (2V/div) VIN (V) (5V/div)

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

Figure 35. Typical Start-up Using On/Off Voltage (Io =

Io,max).

Figure 36. Typical Start-up Using Input Voltage (VIN =

12V, Io = Io,max).

100

0 5 10 15 20

Vin=7V

Vin=12V

Vin=14V

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 12

Design Considerations

Input Filtering

The 20A Analog Micro DLynxTM 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 20A of load current with 2x22 µF or 3x22

µF ceramic capacitors and an input of 12V.

Input Ripple Voltage (mVp-p)

Output Voltage (Vdc)

Figure 37. Input ripple voltage for various output

voltages with 2x22 µF or 3x22 µF ceramic

capacitors at the input (20A 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 2x47 µF ceramic

capacitors at the output of the module. However,

additional output filtering may be required by the

system designer for a number of reasons. First, there

may be a need to further reduce the output ripple and

noise of the module. Second, the dynamic response

characteristics may need to be customized to a

particular load step change.

To reduce the output ripple and improve the dynamic

response to a step load change, additional

capacitance at the output can be used. Low ESR

polymer and ceramic capacitors are recommended to

improve the dynamic response of the module. Figure

32 provides output ripple information for different

external capacitance values at various Vo and a full

load current of 20A. 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

LoopTM feature described later in this data sheet.

Figure 38. Output ripple voltage for various output

voltages with external 2x47 µF, 4x47 µF, 6x47 µF or

8x47 µF ceramic capacitors at the output (20A

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 2nd, CSA C22.2 No.

60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805

Teil 1 + A11):2009-11; EN 60950-1:2006 + A11:2009-

03.

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 MicroDLynx series were tested using an external

Littelfuse 456 series fast-acting fuse rated at 30 A, 100

Vdc in the ungrounded input.

100

150

200

250

300

350

400

450

0.511.522.533.544.55

2x22uF

3x22 uF

0.511.522.533.544.55

Ripple (mVp-p)

Output Voltage(Volts)

2x47uF Ext Cap

4x47uF Ext Cap

6x47uF Ext Cap

8x47uF Ext Cap

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 13

Feature Descriptions

Remote On/Off

The 20A Analog Micro DLynxTM 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.

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 Q7 is turned OFF, which keeps Q6 OFF and

Q5 OFF. This allows the internal PWM #Enable signal

to be pulled up by the internal 3.3V, thus turning the

module ON. When transistor Q2 is turned ON, the

On/Off pin is pulled low, which turns Q7, Q6 and Q5

ON and the internal PWM #Enable signal is pulled low

and the module is OFF. A suggested value for Rpullup is

20kΩ.

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 Q3 is turned ON.

This turns Q6 ON, followed by Q5 turning ON which

pulls the internal ENABLE low and the module is OFF.

To turn the module ON, Q2 is turned ON pulling the

On/Off pin low, turning transistor Q3 OFF, which keeps

Q6 and Q5 OFF resulting in the PWM Enable pin

going high.

Figure 39. Circuit configuration for using positive

On/Off logic.

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.

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. . 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. 41. The Upper Limit

curve shows that for output voltages lower than 1V, the

input voltage must be lower than the maximum of

14.4V. The Lower Limit curve shows that for output

voltages higher than 0.6V, the input voltage needs to

be larger than the minimum of 3V. .

Figure 41. Output Voltage vs. Input Voltage Set

Point Area plot showing limits where the output

voltage can be set for different input voltages.

3.3V

ENABLE

20K

22K

100K

Rpullup

+VIN

GND

ON/OFF

DLYNX

MODULE

20K

Q7 4.7K

470

22K

GND

ON/OFF

20K

ON/OFF

3.3V

DLYNX MODULE

470

20K

100K

20K

ENABLE

22K

4.7K

22K

Rpullup

+VIN

0.511.522.533.544.555.56

Input Voltage (v)

Output Voltage (V)

Lower

Upper

Data Sheet

January 11, 2012

20A Analog Micro DLynx

: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

(+)

TRIM

─

trim

LOAD

(+)

ON/OFF

VS+

SIG_GND

Caution – Do not connect SIG_GND to GND

elsewhere in the layout

Figure 42. Circuit configuration for programming

output voltage using an external resistor.

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:

()













−

Rtrim

6.0

Rtrim is the external resistor in kΩ

Vo is the desired output voltage.

Table 1 provides Rtrim values required for some

common output voltages.

Table 1

O, set

(V) Rtrim (KΩ)

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

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

Voltage Margining

Output voltage margining can be implemented in the

module by connecting a resistor, R

margin-up

, from the

Trim pin to the ground pin for margining-up the output

voltage and by connecting a resistor, R

margin-down

, from

the Trim pin to output pin for margining-down. Figure

43 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 R

margin-up

and R

margin-down

for a specific output voltage and % margin. Please

consult your local Lineage Power technical

representative for additional details.

Figure 43. Circuit Configuration for margining

Output voltage.

Output Voltage Sequencing

The power module includes a sequencing feature, EZ-

SEQUENCE that enables users to implement various

types of output voltage sequencing in their

applications. This is accomplished via an additional

sequencing pin. When not using the sequencing

feature, 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.

Figure 44. 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-to-

one basis. By connecting multiple modules together,

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.

100 pF

DLynx Module

R1=Rtrim

20K

SIG_GND

SEQ

MODULE

SIG_GND

Trim

Rtrim

Rmargin-up

Rmargin-down

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 15

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.

Overcurrent Protection

To provide protection in a fault (output overload)

condition, the unit is equipped with internal

current-limiting circuitry and can endure current limiting

continuously. At the point of current-limit inception, the

unit enters hiccup mode. The unit operates normally

once the output current is brought back into its

specified range.

Overtemperature Protection

To provide protection in a fault condition, the unit is

equipped with a thermal shutdown circuit. The unit will

shut down if the overtemperature threshold of 120oC

(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.

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.

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. 45, with the converter being

synchronized by the rising edge of the external signal.

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

GND

─

Figure 45. External source connections to

synchronize switching frequency of the module.

Dual Layout

Identical dimensions and pin layout of Analog and

Digital Micro DLynx modules permit migration from one

to the other without needing to change the layout. In

both cases the trim resistor is connected between trim

and signal ground.

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

±10% outside the setpoint value. The PGOOD terminal

can be connected through a pullup resistor (suggested

value 100KΩ) to a source of 5VDC or lower.

Tunable LoopTM

The module has a feature that optimizes transient

response of the module called Tunable LoopTM.

External capacitors are usually added to the output of

the module for two reasons: to reduce output ripple

and noise (see 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.

The Tunable LoopTM allows the user to externally

adjust the voltage control loop to match the filter

network connected to the output of the module. The

Tunable LoopTM is implemented by connecting a series

R-C between the SENSE 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.

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 2 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

VS+

MODULE

SIG_GND

TRIM

VOUT

RTune

CTune

RTrim

GND

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 16

requirements. Selecting RTUNE and CTUNE according to

Table 2 will ensure stable operation of the module.

In applications with tight output voltage limits in the

presence of dynamic current loading, additional output

capacitance will be required. Table 3 lists

recommended values of RTUNE and CTUNE in order to

meet 2% output voltage deviation limits for some

common output voltages in the presence of a 10A to

20A 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 2x47μF 4x47μF 6x47μF 10x47μF20x47μF

RTUNE 330 330 270 220 180

CTUNE 47pF 560pF 1200pF 2200pF 4700pF

Table 3. Recommended values of RTUNE and CTUNE

to obtain transient deviation of 2% of Vout for a

10A step load with Vin=12V.

Vo 5V 3.3V 2.5V 1.8V 1.2V 0.6V

Co 8x47μF

5x47

1x330μF

Polymer

2x47

2x330μF

Polymer

2x47

3x330μF

Polymer

1x47

5x330μF

Polymer

1x47

11x330μF

Polymer

RTUNE 220 220 220 220 180 180

CTUNE 1500pF 2200pF 3300pF 5600pF 10nF 47nF

ΔV 100mV 64mV 49mV 36mV 24mV 12mV

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 17

Thermal Considerations

Power modules operate in a variety of thermal

environments; however, sufficient cooling should

always be provided to help ensure reliable operation.

Considerations include ambient temperature, airflow,

module power dissipation, and the need for increased

reliability. A reduction in the operating temperature of

the module will result in an increase in reliability. The

thermal data presented here is based on physical

measurements taken in a wind tunnel. The test set-up

is shown in Figure 47. The preferred airflow direction

for the module is in Figure 48.

flow

Power Module

ind Tunnel

PWBs

12.7_

(0.50)

76.2_

(3.0)

Probe Location

for measuring

airflow and

ambient

temperature

25.4_

(1.0)

Figure 47. Thermal Test Setup.

The thermal reference points, Tref used in the

specifications are also shown in Figure 48. 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 Board-

Mounted Power Modules” for a detailed discussion of

thermal aspects including maximum device

temperatures.

Figure 48. Preferred airflow direction and location

of hot-spot of the module (Tref).

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 18

Example Application Circuit

Requirements:

Vin: 12V

Vout: 1.8V

Iout: 10A max., worst case load transient is from 10A to 15A

ΔVout: 1.5% of Vout (27mV) for worst case load transient

Vin, ripple 1.5% of Vin (180mV, p-p)

CI1 3x22μF/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)

CI2 47μF/16V bulk electrolytic

CO1 N.A.

CO2 3 x 330μF/6.3V Polymer (e.g. Sanyo Poscap)

CTune 4700pF ceramic capacitor (can be 1206, 0805 or 0603 size)

RTune 330 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%)

TRIM

VOUT

VS+

CTUNE

GND

RTUNE

RTrim

VIN

Cin

Vout+ Vin+

ON/OFF

PGOOD

SEQ

MODULE

SIG_GND

VS-

GND SYNC

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 19

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.)

1 If unused, connect to Ground.

PIN FUNCTION PIN FUNCTION

1 ON/OFF 10 SYNC1

2 VIN 11 NC

3 SEQ 12 NC

4 GND 13 NC

5 TRIM 14 SIG_GND

6 VOUT 15 NC

7 VS+ 16 NC

8 VS-

9 PG

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 20

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.)

2 If unused, connect to Ground.

PIN FUNCTION PIN FUNCTION

1 ON/OFF 10 SYNC2

2 VIN 11 NC

3 SEQ 12 NC

4 GND 13 NC

5 TRIM 14 SIG_GND

6 VOUT 15 NC

7 VS+ 16 NC

8 VS-

9 PG

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 21

Document No: DS10-011 ver. 1.24

PDF name: UVT020A0X.pdf

Packaging Details

The 12V Analog Micro DLynxTM 20A modules are supplied in tape & reel as standard. Modules are shipped in

quantities of 200 modules per reel.

All Dimensions are in millimeters and (in inches).

Reel Dimensions:

Outside Dimensions: 330.2 mm (13.00)

Inside Dimensions: 177.8 mm (7.00”)

Tape Width: 44.00 mm (1.732”)

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 22

Surface Mount Information

Pick and Place

The 20A Analog Micro DLynxTM modules use an open

frame construction and are designed for a fully

automated assembly process. The modules are fitted

with a label designed to provide a large surface area

for pick and place operations. The label meets all the

requirements for surface mount processing, as well as

safety standards, and is able to withstand reflow

temperatures of up to 300oC. The label also carries

product information such as product code, serial

number and the location of manufacture.

Nozzle Recommendations

The module weight has been kept to a minimum by

using open frame construction. Variables such as

nozzle size, tip style, vacuum pressure and placement

speed should be considered to optimize this process.

The minimum recommended inside nozzle diameter

for reliable operation is 3mm. The maximum nozzle

outer diameter, which will safely fit within the allowable

component spacing, is 7 mm.

Bottom Side / First Side Assembly

This module is not recommended for assembly on the

bottom side of a customer board. If such an assembly

is attempted, components may fall off the module

during the second reflow process.

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

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).

For questions regarding Land grid array(LGA)

soldering, solder volume; please contact Lineage

Power for special manufacturing process instructions.

The recommended linear reflow profile using Sn/Ag/Cu

solder is shown in Fig. 49. Soldering outside of the

recommended profile requires testing to verify results

and performance.

MSL Rating

The 20A Analog Micro DLynxTM modules have a MSL

rating of 2.

Storage and Handling

The recommended storage environment and handling

procedures for moisture-sensitive surface mount

packages is detailed in J-STD-033 Rev. A (Handling,

Packing, Shipping and Use of Moisture/Reflow

Sensitive Surface Mount Devices). Moisture barrier

bags (MBB) with desiccant are required for MSL

ratings of 2 or greater. These sealed packages should

not be broken until time of use. Once the original

package is broken, the floor life of the product at

conditions of ≤ 30°C and 60% relative humidity varies

according to the MSL rating (see J-STD-033A). The

shelf life for dry packed SMT packages will be a

minimum of 12 months from the bag seal date, when

stored at the following conditions: < 40° C, < 90%

relative humidity.

Figure 49. 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).

Per J-STD-020 Rev. C

100

150

200

250

300

Reflow Time (Seconds)

Reflow Temp (°C)

Heating Zone

1°C/Se cond

Peak Temp 260°C

* Min. Time Above 235°C

15 Seconds

*Time Above 217°C

60 Seconds

Cooling

Zone

Data Sheet

January 11, 2012

20A Analog Micro DLynxTM: Non-isolated DC-DC Power Modules

3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER 23

Document No: DS10-011 ver. 1.24

PDF name: UVT020A0X.pdf

Ordering Information

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

Table 4. Device Codes

Device Code Input

Voltage Range

Output

Voltage

Output

Current

On/Off

Logic Sequencing Comcodes

UVT020A0X3-SRZ 3 – 14.4Vdc 0.6 – 5.5Vdc 20A Negative Yes CC109159744

UVT020A0X3-SRDZ 3 – 14.4Vdc 0.6 – 5.5Vdc 20A Negative Yes CC109168753

UVT020A0X43-SRZ 3 – 14.4Vdc 0.6 – 5.5Vdc 20A Positive Yes CC109159752

-Z refers to RoHS compliant parts

Table 5. Coding Scheme

Package

Identifier

Family Sequencing

Option

Output

current

Output

voltage

On/Off

logic

Remote

Sense Options

ROHS

Compliance

U V T 020A0 X 3 -SR -D Z

P=Pico

U=Micro

M=Mega

G=Giga

D=Dlynx

Digital

V =

DLynx

Analog.

T=with EZ

Sequence

X=without

sequencing

20A X =

programm

able output

4 =

positive

No entry

negative

3 =

Remote

Sense

S =

Surface

Mount

R =

Tape &

Reel

D = 105°C

operating

ambient,

40G

operating

shock as

per MIL

Std 810F

Z = ROHS6

World Wide Headquarters

Lineage Power Corporation

601 Shiloh Road, Plano, TX 75074, USA

+1-888-LINEAGE(546-3243)

(Outside U.S.A.: +1-972-244-WATT(9288))

www.lineagepower.com

e-mail: techsupport1@lineagepower.com

Asia-Pacific Headquarters

Tel: +86.021.54279977*808

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

pplication. No rights under any patent accompany the sale of any such product(s) or information.

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

2011 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.