Data Sheet
June 11, 2007
Austin Microlynx
TM
II SMT Non-isolated Power Modules:
2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A Output Current
RoHS Compliant
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Flexible output voltage sequencing EZ-
TM
SEQUENCE
Delivers up to 6A output current
EZ-SEQUENCE
TM
High efficiency – 96% at 3.3V full load (V
IN
= 5.0V)
Small size and low profile:
27.9 mm x 11.4 mm x 7.24 mm
(1.10 in x 0.45 in x 0.285 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 12.8M hours at 25
o
C Full-load
Output voltage programmable from 0.75 Vdc to
3.63Vdc via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4 % (typical)
Remote On/Off
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to 85°C)
UL*
60950-1Recognized,
CSA
C22.2 No.
‡
60950-1-03 Certified, and
VDE
0805:2001-12
(EN60950-1) Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
†
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
Description
Austin MicroLynx II SMT (surface mount technology) power modules are non-isolated dc-dc converters that can
deliver up to 6A of output current with full load efficiency of 96.0% at 3.3V output. These modules provide a
precisely regulated output voltage programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide
TM
TM
range of input voltage (V
IN
= 2.4 – 5.5Vdc). Austin MicroLynx II has a sequencing feature, EZ-SEQUENCE that
enable designers to implement various types of output voltage sequencing when powering multiple modules on
board.
TM
*
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: DS03-107 ver. 0.8
PDF name:
microlynx_II_smt_ds.pdf
Data Sheet
June 11, 2007
Austin MicroLynx
TM
II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A 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
Input Voltage
Continuous
Sequencing voltage
Operating Ambient Temperature
(see Thermal Considerations section)
Storage Temperature
All
T
stg
-55
125
°C
All
All
Vseq
T
A
-0.3
-40
V
IN,max
85
Vdc
°C
Device
All
Symbol
V
IN
Min
-0.3
Max
5.8
Unit
Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(V
IN
= V
IN, min
to V
IN, max
, I
O
=I
O, max
)
Input No Load Current
(V
IN
= V
IN, nom
, Io = 0, module enabled)
Input Stand-by Current
(V
IN
= V
IN, nom
, module disabled)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1µH source impedance; V
IN, min
to
V
IN, max,
I
O
= I
Omax
; See Test configuration section)
Input Ripple Rejection (120Hz)
All
All
All
35
I
2
t
0.04
V
O,set
= 0.75 Vdc
V
O,set
= 3.3Vdc
All
I
IN,No load
I
IN,No load
I
IN,stand-by
20
45
0.6
A
2
s
mAp-p
dB
Device
V
o,set
≤
3.63
All
Symbol
V
IN
I
IN,max
6.0
mA
mA
mA
Min
2.4
Typ
Max
5.5
Unit
Vdc
Adc
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-
acting fuse with a maximum rating of 6 A (see Safety Considerations section). Based on the information provided in
this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be
used. Refer to the fuse manufacturer’s data sheet for further information.
Tyco Electronics Power Systems
2
Data Sheet
June 11, 2007
Austin MicroLynx
TM
II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Electrical Specifications
(continued)
Parameter
Output Voltage Set-point
(V
IN
=
IN, min
, I
O
=I
O, max
, T
A
=25°C)
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range
Selected by an external resistor
Output Regulation
Line (V
IN
=V
IN, min
to V
IN, max
)
Load (I
O
=I
O, min
to I
O, max
)
Temperature (T
ref
=T
A, min
to T
A, max
)
Output Ripple and Noise on nominal output
(V
IN
=V
IN, nom
and I
O
=I
O, min
to I
O, max
Cout = 1µF ceramic//10µFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance
ESR
≥
1 mΩ
ESR
≥
10 mΩ
Output Current
Output Current Limit Inception (Hiccup Mode )
(V
O
= 90% of V
O, set
)
Output Short-Circuit Current
(V
O
≤250mV)
( Hiccup Mode )
Efficiency
V
IN
= V
IN, nom
, T
A
=25°C
I
O
=I
O, max ,
V
O
= V
O,set
V
O, set
= 1.2Vdc
V
O,set
= 1.5Vdc
V
O,set
= 1.8Vdc
V
O,set
= 2.5Vdc
V
O,set
= 3.3Vdc
Switching Frequency
Dynamic Load Response
(dIo/dt=2.5A/µs; V
IN
= V
IN, nom
; T
A
=25°C)
Load Change from Io= 50% to 100% of
Io,max; 1µF ceramic// 10 µF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=2.5A/µs; V
IN
= V
IN, nom
; T
A
=25°C)
Load Change from Io= 100% to 50%of Io,max:
1µF ceramic// 10 µF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation)
All
t
s
25
µs
All
All
t
s
V
pk
25
130
µs
mV
All
V
pk
130
mV
All
η
η
η
η
η
f
sw
81.0
87.0
89.0
90.0
93.0
300
%
%
%
%
%
kHz
All
I
O, s/c
2
Adc
All
All
All
All
C
O, max
C
O, max
I
o
I
O, lim
0
220
1000
5000
6
µF
µF
Adc
% I
o
All
All
10
40
15
50
mV
rms
mV
pk-pk
All
All
All
0.3
0.4
0.4
% V
O, set
% V
O, set
% V
O, set
All
V
O
0.7525
3.63
Vdc
All
V
O, set
–3.0
+3.0
% V
O, set
Device
All
Symbol
V
O, set
Min
-2.0
Typ
Max
+2.0
Unit
% V
O, set
Tyco Electronics Power Systems
3
Data Sheet
June 11, 2007
Austin MicroLynx
TM
II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Electrical Specifications
(continued)
Parameter
Dynamic Load Response
(dIo/dt=2.5A/µs; V V
IN
= V
IN, nom
; T
A
=25°C)
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 µF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=2.5A/µs; V
IN
= V
IN, nom
; T
A
=25°C)
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 µF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
All
V
pk
50
mV
Device
Symbol
Min
Typ
Max
Unit
All
All
t
s
V
pk
50
50
µs
mV
All
t
s
50
µs
General Specifications
Parameter
Calculated MTBF (I
O
=I
O, max
, T
A
=25°C)
Weight
Min
Typ
12,841,800
2.8 (0.1)
Max
Unit
Hours
g (oz.)
Tyco Electronics Power Systems
4
Data Sheet
June 11, 2007
Austin MicroLynx
TM
II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 6A output current
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter
On/Off Signal interface
Device code with Suffix “4” – Positive logic
(On/Off is open collector/drain logic input;
Signal referenced to GND - See feature description section)
Input High Voltage (Module ON)
Input High Current
Input Low Voltage (Module OFF)
Input Low Current
Device Code with no suffix – Negative Logic
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Input High Voltage (Module OFF)
Input High Current
Input Low Voltage (Module ON)
Input low Current
Turn-On Delay and Rise Times
(I
O
=I
O, max ,
V
IN
= V
IN, nom,
T
A
= 25
o
C, )
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which V
IN
=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 set to logic Low (delay from
instant at which Von/Off=0.3V until Vo=10% of Vo, set)
Output voltage Rise time (time for Vo to rise from 10%
of V
o,set
to 90% of Vo, set)
Output voltage overshoot – Startup
I
O
= I
O, max
; V
IN
= 3.0 to 5.5Vdc, T
A
= 25 C
Sequencing Delay time
Delay from V
IN, min
to application of voltage on SEQ pin
Tracking Accuracy
(Power-Up: 2V/ms)
(Power-Down: 1V/ms)
(V
IN, min
to V
IN, max
; I
O, min
to I
O, max
V
SEQ
< V
o
)
Overtemperature Protection
(See Thermal Considerations section)
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
All
All
2.2
2.0
V
V
All
T
ref
150
°C
All
All
All
Ts
EQ-delay
|V
SEQ
–V
o
|
|V
SEQ
–V
o
|
10
100
200
200
400
msec
mV
mV
o
Device
Symbol
Min
Typ
Max
Unit
All
All
All
All
V
IH
I
IH
V
IL
I
IL
―
―
-0.2
―
―
―
―
0.2
V
IN, max
10
0.3
1
V
µA
V
mA
All
All
All
All
V
IH
I
IH
V
IL
I
IL
1.5
-0.2
―
0.2
―
―
V
IN,max
1
0.3
10
Vdc
mA
Vdc
µA
All
Tdelay
―
3.9
―
msec
All
Tdelay
―
3.9
―
msec
All
Trise
―
4.2
―
8.5
1
msec
% V
O, set
Tyco Electronics Power Systems
5
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