©2012 General Electric Company. All rights reserved.
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 0.45Vdc to 5.5Vdc via
external resistor
Tunable Loop
TM
to optimize dynamic output voltage
response
Flexible output voltage sequencing EZ-SEQUENCE
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
nd
Ed. Recognized, CSA† C22.2 No. 60950-1-
07 Certified, and VDE‡ (EN60950-1 2nd 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 MicroDLynxTM 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 (VIN = 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 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
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
Operating Ambient Temperature
(see Thermal Considerations section)
(VIN=3V to 14V, IO=I
O, max
)
Input No Load Current
(VIN = 12Vdc, IO = 0, module enabled)
Input Stand-by Current
(VIN = 12Vdc, module disabled)
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= I
Omax
;
See Test Configurations)
50 mAp-p
Input Ripple Rejection (120Hz)
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.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
Output Voltage Set-point (with 0.1% tolerance for external
resistor used to set output voltage)
Output Voltage (Over all operating input voltage, resistive
load, and temperature conditions until end of life)
Adjustment Range (selected by an external resistor)
(Some output voltages may not be possible depending on the
input voltage – see Feature Descriptions Section)
Output Regulation (for VO ≥ 2.5Vdc)
Load (IO=I
O, min
to I
O, max
)
Output Regulation (for VO < 2.5Vdc)
Load (IO=I
O, min
to I
O, max
)
Temperature (T
ref=TA, min
to T
A, max
)
Output Ripple and Noise on nominal output
(VIN=V
IN, nom
and IO=I
O, min
to I
O, max
Co = 0.1μF // 22 μF ceramic
capacitors)
Peak-to-Peak (5Hz to 20MHz bandwidth)
RMS (5Hz to 20MHz bandwidth)
Output Current (in either sink or source mode)
Output Current Limit Inception (Hiccup Mode)
(current limit does not operate in sink mode)
Output Short-Circuit Current
(VO≤250mV) ( Hiccup Mode )
IO=I
O, max , VO
= V
O,set
Electrical Specifications (continued)
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.
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
Frequency Synchronization
Synchronization Frequency Range
0.4 V Input Current, SYNC
Minimum Pulse Width, SYNC
Calculated MTBF (IO=0.8I
O, max
, TA=40°C) Telecordia Issue 2
Method 1 Case 3
IN, min
to V
IN, max
; open collector or equivalent,
Signal referenced to GND)
Device code with suffix “4” – Positive Logic (See Ordering
Information)
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)
Electrical Specifications (continued)
General Specifications
Feature Specifications
Unless otherwise indicated, specifications apply overall operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
Turn-On Delay and Rise Times
IN, nom
, IO=I
O, 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 = V
IN, min
until Vo =
10% of Vo, set)
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)
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set)
Output voltage overshoot (TA = 25oC
VIN= V
IN, min
to V
IN, max,IO
= I
O, min
to I
O, max
)
With or without maximum external capacitance
Over Temperature Protection
(See Thermal Considerations section)
Tracking Accuracy (Power-Up: 2V/ms)
(V
IN, min
to V
IN, max
; I
O, min
to I
O, max
VSEQ < Vo)
Input Undervoltage Lockout
Resolution of Adjustable Input Under Voltage Threshold
Signal Interface Open Drain, V
supply
5VDC
Overvoltage threshold for PGOOD ON
Overvoltage threshold for PGOOD OFF
Undervoltage threshold for PGOOD ON
Undervoltage threshold for PGOOD OFF
Pulldown resistance of PGOOD pin
50 Sink current capability into PGOOD pin
Feature Specifications (cont.)
* Over temperature Warning – Warning may not activate before alarm and unit may shutdown before warning
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
EFFICIENCY, (%)
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
V
O
(V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (10Adiv) V
O
(V) (10mV/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
V
O
(V) (200mV/div) V
ON/OFF
(V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
V
O
(V) (200mV/div) V
IN
(V) (5V/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).
50
55
60
65
70
75
80
85
90
0 5 10 15 20
2
6
10
14
18
22
55 65 75 85 95 105
Characteristic Curves
The following figures provide typical characteristics for the 20A Analog MicroDLynxTM at 0.6Vo and 25oC.
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current.
Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
V
O
(V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (10Adiv) V
O
(V) (20mV/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
V
O
(V) (500mV/div) V
ON/OFF
(V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
V
O
(V) (500mV/div) V
IN
(V) (5V/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).
50
55
60
65
70
75
80
85
90
95
0 5 10 15 20
2
6
10
14
18
22
55 65 75 85 95 105
Characteristic Curves
The following figures provide typical characteristics for the 20A Analogl MicroDLynxTM at 1.2Vo and 25oC.
20A Analog MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
©2012 General Electric Company. All rights reserved.
EFFICIENCY, (%)
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
V
O
(V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (10Adiv) V
O
(V) (20mV/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
V
O
(V) (500mV/div) V
ON/OFF
(V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
V
O
(V) (500mV/div) V
IN
(V) (5V/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).
70
75
80
85
90
95
0 5 10 15 20
2
6
10
14
18
22
55 65 75 85 95 105
Characteristic Curves
The following figures provide typical characteristics for the 20A Analog MicroDLynxTM at 1.8Vo and 25oC.