Murata OKL-T/3-W5N-C Programmable output 3-amp ilga smt pol Datasheet

OKL-T/3-W5 Series
www.murata-ps.com
Programmable Output 3-Amp iLGA SMT PoLs
PRODUCT OVERVIEW
Typical unit
The OKL-T/3-W5 series are miniature non-isolated Point-of-Load (PoL) DC/DC power converters
for embedded applications. The tiny form factor is
configured on a Land Grid Array (LGA) assembly
measuring only 0.48 x 0.48 x 0.244 inches max.
(12.2 x 12.2 x 6.2 mm max.).
The wide input range is 2.4 to 5.5 Volts DC.
The maximum output current is 3 Amps. Based
on fixed-frequency synchronous buck converter
switching topology, the high power conversion
efficient Point of Load (PoL) module features
programmable output voltage and On/Off control.
These converters also include under voltage lock
out (UVLO), output short circuit protection, overcurrent and over temperature protections.
An optional sequence/tracking feature allows
power sequencing of PoL’s. These units meet all
standard UL/EN/IEC 60950-1 safety certifications
(2nd Edition) and RoHS-6 hazardous substance
compliance.
FEATURES
■
iLGA inspectable Land Grid Array
■
2.4-5.5Vdc input voltage range
■
Programmable output voltage from 0.6-3.63Vdc
■
Drives 200 μF ceramic capacitive loads
■
High power conversion efficiency at 95.3%
■
Outstanding thermal derating performance
■
Over temperature and over current protection
■
On/Off control
■
Meets UL/EN/IEC 60950-1 safety, 2nd Edition
■
RoHS-6 hazardous substance compliance
■
Sequence/Tracking operation (optional)
Contents
Description, Connection Diagram, Photograph
Ordering Guide, Model Numbering, Product Label
Mechanical Specifications, Input/Output Pinout
Detailed Electrical Specifications
Output Voltage Adjustment, Application Notes
Performance Data and Oscillograms
Tape and Reel Information
Page
1
2
3
4
5
8
15
Connection Diagram
+Vin
F1
On/Off
Control
+Vout
t4XJUDIJOH
Controller
Sense
t'JMUFST
t$VSSFOU4FOTF
External
DC
Power
Source
Trim
Open = On
Closed = Off
(Positive
On/Off)
Reference and
Error Amplifier
Common
Sequence/Tracking
(OKL2 Models)
Common
Figure 1. OKL-T/3-W5
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifications.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
email: [email protected]
12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 1 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
Performance Specifications and Ordering Guide
ORDERING GUIDE
OKL-T/3-W5P-C
0.6-3.63
3
9.9
25
±0.25% ±0.25%
5
2.4-5.5
25
2.08
93.3% 95.3% Pos.
no
0.48x0.48x0.244 max
(12.2x12.2x6.2) max
OKL-T/3-W5N-C
0.6-3.63
3
9.9
25
±0.25% ±0.25%
5
2.4-5.5
25
2.08
93.3% 95.3% Neg.
no
0.48x0.48x0.244 max
(12.2x12.2x6.2) max
OKL2-T/3-W5P-C
0.6-3.63
3
9.9
25
±0.25% ±0.25%
5
2.4-5.5
25
2.08
93.3% 95.3% Pos.
yes
0.48x0.48x0.244 max
(12.2x12.2x6.2) max
OKL2-T/3-W5N-C
0.6-3.63
3
9.9
25
±0.25% ±0.25%
5
2.4-5.5
25
2.08
93.3% 95.3% Neg.
yes
0.48x0.48x0.244 max
(12.2x12.2x6.2) max
➀
➁
The output range is limited by Vin. See detailed specs.
All specifications are at nominal line voltage, Vout=nominal (3.3V) and full load, +25 deg.C.
unless otherwise noted.
Sequence/
Tracking
Input
Efficiency
Regulation
(max.)
Vout Iout (Amps, Power R/N (mV p-p)
Vin nom. Range Iin, no load Iin, full load
(Volts) ➀
max.)
(Watts)
Max. ➃
(Volts) (Volts) (mA) ➃ (Amps) ➁ Min. Typ.
Line
Load
On/Off
Polarity
Output
Package - Pinout P83
Model Number
Case C83
inches (mm)
➂ Use adequate ground plane and copper thickness adjacent to the converter.
fRipple and Noise (R/N) and no-load input current are shown at Vout=1V. See specs for details.
Output capacitors are 10 μF ceramic. Input cap is 22 μF. See detailed specifications.
I/O caps are necessary for our test equipment and may not be needed for your application.
PART NUMBER STRUCTURE
OK L 2 - T / 3 - W5 N - C
Okami Non-isolated PoL
RoHS Hazardous
Substance Compliance
C = RoHS-6 (does not claim EU RoHS exemption
7b–lead in solder)
LGA Surface Mount
Sequence/tracking
Blank = Not installed
2 = Installed
On/Off Polarity
P = Positive Polarity
N = Negative Polarity
Trimmable Output
Voltage Range
0.6-3.63Vdc
Input Voltage Range
2.4-5.5Vdc
Maximum Rated Output
Current in Amps
Product Label
Because of the small size of these products, the product label contains a
character-reduced code to indicate the model number and manufacturing date
code. Not all items on the label are always used. Please note that the label
differs from the product photograph. Here is the layout of the label:
Mfg.
date
code
XXXXXX
Product code
YMDX Rev.
Revision level
Figure 2. Label Artwork Layout
The label contains three rows of information:
First row – Murata Power Solutions logo
Second row – Model number product code (see table)
Third row – Manufacturing date code and revision level
Model Number
Product Code
OKL-T/3-W5P-C
L01003
OKL-T/3-W5N-C
L00003
OKL2-T/3-W5P-C
L21003
OKL2-T/3-W5N-C
L20003
The manufacturing date code is four characters:
First character – Last digit of manufacturing year, example 2009
Second character – Month code (1 through 9 and O through D)
Third character – Day code (1 through 9 = 1 to 9, 10=O and
11 through 31 = A through Z)
Fourth character – Manufacturing information
www.murata-ps.com
email: [email protected]
12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 2 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
MECHANICAL SPECIFICATIONS
Top View
INPUT/OUTPUT CONNECTIONS
0.48
(12.19)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Bottom View
0.48
(12.19)
Side View
Function
On/Off Control*
VIN
Ground
VOUT
Sense
Trim
Ground
NC
Sequence/Tracking
NC
NC
NC
*The Remote On/Off can be provided with
either positive (P suffix) or negative (N
suffix) polarity
0.244
(6.2)
max.
End View
Recommended Footprint
-through the Board-
2
2
Vin
Gnd
Vout
0.375 (9.53)
5
Sense
11
On/Off
1
NC
0.150 (3.81)
6
Vin
Trim
10
NC
Gnd
NC
9
0.420 (10.67)
8
0.330 (8.38)
0.240 (6.10)
0.150 (3.81)
7
Gnd
CL
CL
1 On/Off
0.090
(2.29)
Sense
NC
10
0.180 (4.57)
0.135 (3.43)
5
11
0.180 (4.57)
6
9
Seq
12
4
Seq
0.060 (1.52)
0
0.480 REF (12.19)
0.420 (10.67)
0.240 (6.10)
3
0.070 x 0.160 x3
(1.77 x 4.07)
Vout
3
4
0.480 (12.19)
0.135
0.180
(3.43)
(4.57)
0.045
(1.14)
0.375 (9.53)
0.195 (4.95)
0
0.060 (1.52)
Bottom View
NC Gnd
8
7
NC
Trim
12
Dimensions are in inches (mm shown for ref. only).
0.090
(2.29)
0.180 0.090
(4.57) (2.29)
Third Angle Projection
0.040 x 0.040 x9
(1.01 x 1.01)
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚
Figure 3. OKL-T/3-W5 Mechanical Outline
Components are shown for reference only.
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email: [email protected]
12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 3 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
Performance and Functional Specifications
(Vin on or On/Off to Vout regulated)
Switching Frequency
See Note 1
Input
6 mSec for Vout=nominal (Remote On/Off)
600 KHz
Environmental
Input Voltage Range
Isolation
Start-Up Voltage
Undervoltage Shutdown (see Note 15)
Overvoltage Shutdown
Reflected (Back) Ripple Current (Note 2)
Internal Input Filter Type
Recommended External Fuse
Reverse Polarity Protection
See Ordering Guide and Note 7.
Not isolated
2.05 V
1.92 V
None
TBD mA pk-pk
Capacitive
TBD
None. See fuse information.
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output in Short Circuit
Low Line (Vin=Vmin)
See Ordering Guide
TBD A2Sec.
1 mA
10 mA
1.48 A.
Outline Dimensions
Weight
Safety
See Mechanical Specifications
0.06 ounces (1.6 grams)
Meets UL/cUL 60950-1, CSAC22.2 No. 60950-1, IEC/EN 60950-1,
2nd Edition
ON = Open pin or -0.2V to Vin -1.6V max.
OFF = Vin -0.8V min. to +Vin
ON = Open pin (internally pulled up) or
+1.2V to +Vin max.
OFF = -0.3V to +0.3V max. or ground
TBD
Restriction of Hazardous Substances
7b–lead in solder)
RoHS-6 (does not claim EU RoHS exemption
Calculated MTBF (hours)
Telecordia method (4a)
Calculated MTBF (hours)
MIL-HDBK-217N2 method (4b)
OKL Models
10,820,000
OKL2 Models
5,229,000
5,999,000
5,176,000
Operating Temperature Range (Ambient, all output ranges)
See derating curves
-40 to +85 ˚C. with derating (Note 9)
Storage Temperature Range
-55 to +125 deg. C.
Thermal Protection/Shutdown
Included in PWM
Relative Humidity
To 85%/+85 ˚C., non-condensing
Physical
Remote On/Off Control (Note 5)
Negative Logic
Positive Logic
Current
Tracking/Sequencing (optional)
Slew Rate
Tracking accuracy, rising input
Tracking accuracy, falling input
Absolute Maximum Ratings
Input Voltage (Continuous or transient)
On/Off Control
Input Reverse Polarity Protection
Output Current (Note 7)
0 V. to +6 Volts max.
0 V. min. to +Vin max.
See Fuse section
Current-limited. Devices can withstand a
sustained short circuit without damage.
The outputs are not intended to accept
appreciable reverse current.
Storage Temperature
-55 to +125 ˚C.
Lead Temperature
See soldering specifications
Absolute maximums are stress ratings. Exposure of devices to greater than any of
any of these conditions may adversely affect long-term reliability. Proper operation
under conditions other than those listed in the Performance/Functional Specifications
Table is not implied nor recommended.
2 Volts per millisecond, max.
Vout = ±100 mV of Sequence In
Vout = ±100 mV of Sequence In
Output
Output Power
Output Voltage Range
Minimum Loading
Accuracy (50% load, untrimmed)
Voltage Output Range (Note 13)
Overvoltage Protection (Note 16)
Temperature Coefficient
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
Efficiency
9.9W max.
See Ordering Guide
No minimum load
±2.5 % of Vnominal
See Ordering Guide
None
TBD
See Ordering Guide and note 8
See Ordering Guide and note 10
See Ordering Guide
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms
Cap-ESR >0.01 Ohms
200 μF
TBD
Current Limit Inception (Note 6)
(98% of Vout setting, after warm up)
8 Amps
Short Circuit Mode
Short Circuit Current Output
Protection Method
Short Circuit Duration
Prebias Startup
10 mA
Hiccup autorecovery upon overload
removal. (Note 17)
Continuous, no damage
(output shorted to ground)
Converter will start up if the external
output voltage is less than Vnominal.
Dynamic Characteristics
Dynamic Load Response
(50-100% load step, di/dt=1A/μSec)
Peak Deviation
50μSec max. to within ±2% of final value
(Note 1)
±250 mV
Start-Up Time
6 mSec for Vout=nominal (Vin On)
Specification Notes:
(1)
Specifications are typical at +25 °C, Vin=nominal (+5V), Vout=nominal (+3.3V), full load, external caps and
natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced
airflow.
All models are tested and specified with external 10μF ceramic output capacitors and a 22 μF external
input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test
equipment and may not be required to achieve specified performance in your applications. However, Murata
Power Solutions recommends installation of these capacitors. All models are stable and regulate within
spec under no-load conditions.
(2)
Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin=2 x
100 μF ceramic, Cbus=1000 μF electrolytic, Lbus=1 μH.
(3)
Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if the total
RMS current over time does not exceed the Derating curve.
(4a) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fixed
conditions, Tpcboard=+25 ˚C, full output load, natural air convection.
(4b) Mean Time Before Failure is calculated using the MIL-HDBK-217N2 method, ground benign, +25ºC., full
output load, natural convection.
(5)
The On/Off Control Input should use either a switch or an open collector/open drain transistor referenced
to -Input Common. A logic gate may also be used by applying appropriate external voltages which do not
exceed +Vin.
(6)
Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected
setting.
www.murata-ps.com
email: [email protected]
12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 4 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
Specification Notes, Cont.:
APPLICATION NOTES
(7)
Please observe the voltage input and output specifications in the Voltage Range Graph on page 7.
(8)
Output noise may be further reduced by adding an external filter. At zero output current, the output may
contain low frequency components which exceed the ripple specification. The output may be operated
indefinitely with no load.
(9)
All models are fully operational and meet published specifications, including “cold start” at –40˚ C.
(10) Regulation specifications describe the deviation as the line input voltage or output load current is varied
from a nominal midpoint value to either extreme.
(11) Other input or output voltage ranges will be reviewed under scheduled quantity special order.
(12) Maximum PC board temperature is measured with the sensor in the center of the converter.
(13) Do not exceed maximum power specifications when adjusting the output trim.
(14) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external
output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will
reduce output noise but may change the transient response. Newer ceramic caps with very low ESR may
require lower capacitor values to avoid instability. Thoroughly test your capacitors in the application. Please
refer to the Output Capacitive Load Application Note.
(15) Do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times.
Otherwise, you risk having the converter turn off. The undervoltage shutdown is not latching and will
attempt to recover when the input is brought back into normal operating range.
(16) The outputs are not intended to sink appreciable reverse current.
(17) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output.
If the overcurrent condition still exists, the restart current will be removed and then tried again. This short
current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter
immediately recovers normal operation.
Output Voltage Adustment
The output voltage may be adjusted over a limited range by connecting an
external trim resistor (Rtrim) between the Trim pin and Ground. The Rtrim
resistor must be a 1/10 Watt precision metal film type, ±0.5% accuracy or
better with low temperature coefficient, ±100 ppm/oC. or better. Mount the
resistor close to the converter with very short leads or use a surface mount
trim resistor.
In the tables below, the calculated resistance is given. Do not exceed the
specified limits of the output voltage or the converter’s maximum power
rating when applying these resistors. Also, avoid high noise at the Trim
input. However, to prevent instability, you should never connect any capacitors to Trim.
OKL-T/3-W5
Output Voltage
Calculated Rtrim (KΩ)
3.3 V.
0.44
2.5 V.
0.63
2.0 V.
0.86
1.8 V.
1.0
1.5 V.
1.33
1.2 V.
2.0
1.0 V.
3.0
0.6 V.
∞ (open)
Resistor Trim Equation, OKL-T/3-W5 models:
1.2
RTRIM (k:) = _____________
VOUT – 0.6
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs
of power conversion components. Fuses should also be used when there
is the possibility of sustained input voltage reversal which is not currentlimited. For greatest safety, we recommend a fast blow fuse installed in the
ungrounded input supply line.
The installer must observe all relevant safety standards and regulations.
For safety agency approvals, install the converter in compliance with the
end-user safety standard, i.e. IEC/EN/UL 60950-1.
Input Under-Voltage Shutdown and Start-Up Threshold
Under normal start-up conditions, converters will not begin to regulate
properly until the ramping-up input voltage exceeds and remains at the
Start-Up Threshold Voltage (see Specifications). Once operating, converters will not turn off until the input voltage drops below the Under-Voltage
Shutdown Limit. Subsequent restart will not occur until the input voltage
rises again above the Start-Up Threshold. This built-in hysteresis prevents
any unstable on/off operation at a single input voltage.
Users should be aware however of input sources near the Under-Voltage
Shutdown whose voltage decays as input current is consumed (such as
capacitor inputs), the converter shuts off and then restarts as the external
capacitor recharges. Such situations could oscillate. To prevent this, make
sure the operating input voltage is well above the UV Shutdown voltage AT
ALL TIMES.
Start-Up Time
Assuming that the output current is set at the rated maximum, the Vin to
Vout Start-Up Time (see Specifications) is the time interval between the
point when the ramping input voltage crosses the Start-Up Threshold and
the fully loaded regulated output voltage enters and remains within its
specified accuracy band. Actual measured times will vary with input source
impedance, external input capacitance, input voltage slew rate and final
value of the input voltage as it appears at the converter.
These converters include a soft start circuit to moderate the duty cycle of
its PWM controller at power up, thereby limiting the input inrush current.
The On/Off Remote Control interval from On command to Vout regulated
assumes that the converter already has its input voltage stabilized above
the Start-Up Threshold before the On command. The interval is measured
from the On command until the output enters and remains within its
specified accuracy band. The specification assumes that the output is fully
loaded at maximum rated current. Similar conditions apply to the On to Vout
regulated specification such as external load capacitance and soft start
circuitry.
Recommended Input Filtering
The user must assure that the input source has low AC impedance to
provide dynamic stability and that the input supply has little or no inductive
content, including long distributed wiring to a remote power supply. The
converter will operate with no additional external capacitance if these
conditions are met.
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email: [email protected]
12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 5 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
For best performance, we recommend installing a low-ESR capacitor
immediately adjacent to the converter’s input terminals. The capacitor
should be a ceramic type such as the Murata GRM32 series or a polymer
type. Initial suggested capacitor values are 10 to 22 μF, rated at twice the
expected maximum input voltage. Make sure that the input terminals do
not go below the undervoltage shutdown voltage at all times. More input
bulk capacitance may be added in parallel (either electrolytic or tantalum)
if needed.
COPPER STRIP
+OUTPUT
C1
Recommended Output Filtering
The converter will achieve its rated output ripple and noise with no
additional external capacitor. However, the user may install more external output capacitance to reduce the ripple even further or for improved
dynamic response. Again, use low-ESR ceramic (Murata GRM32 series)
or polymer capacitors. Initial values of 10 to 47 μF may be tried, either
single or multiple capacitors in parallel. Mount these close to the converter.
Measure the output ripple under your load conditions.
Use only as much capacitance as required to achieve your ripple and
noise objectives. Excessive capacitance can make step load recovery
sluggish or possibly introduce instability. Do not exceed the maximum rated
output capacitance listed in the specifications.
Input Ripple Current and Output Noise
All models in this converter series are tested and specified for input
reflected ripple current and output noise using designated external input/
output components, circuits and layout as shown in the figures below. The
Cbus and Lbus components simulate a typical DC voltage bus. Please note
that the values of Cin, Lbus and Cbus will vary according to the specific
converter model.
TO
OSCILLOSCOPE
+
–
+
–
LBUS
CBUS
SCOPE
RLOAD
-OUTPUT
COPPER STRIP
C1 = 1μF CERAMIC
C2 = 10μF CERAMIC
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 5: Measuring Output Ripple and Noise (PARD)
Thermal Shutdown
To prevent many over temperature problems and damage, these converters
include thermal shutdown circuitry. If environmental conditions cause the
temperature of the DC/DC’s to rise above the Operating Temperature Range
up to the shutdown temperature, an on-board electronic temperature
sensor will power down the unit. When the temperature decreases below
the turn-on threshold, the converter will automatically restart. There is a
small amount of hysteresis to prevent rapid on/off cycling.
CAUTION: If you operate too close to the thermal limits, the converter
may shut down suddenly without warning. Be sure to thoroughly test your
application to avoid unplanned thermal shutdown.
Temperature Derating Curves
The graphs in the next section illustrate typical operation under a variety of
conditions. The Derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is acceptable under increasing forced airflow measured in Linear Feet per Minute
(“LFM”). Note that these are AVERAGE measurements. The converter will
accept brief increases in current or reduced airflow as long as the average
is not exceeded.
CURRENT
PROBE
+INPUT
VIN
C2
CIN
-INPUT
Note that the temperatures are of the ambient airflow, not the converter
itself which is obviously running at higher temperature than the outside
air. Also note that very low flow rates (below about 25 LFM) are similar to
“natural convection”, that is, not using fan-forced airflow.
CIN = 2 x 100μF, ESR < 700mΩ @ 100kHz
CBUS = 1000μF, ESR < 100mΩ @ 100kHz
LBUS = 1μH
Figure 4: Measuring Input Ripple Current
In figure 5, the two copper strips simulate real-world printed circuit
impedances between the power supply and its load. In order to minimize
circuit errors and standardize tests between units, scope measurements
should be made using BNC connectors or the probe ground should not
exceed one half inch and soldered directly to the test circuit.
Murata Power Solutions makes Characterization measurements in a
closed cycle wind tunnel with calibrated airflow. We use both thermocouples and an infrared camera system to observe thermal performance.
Minimum Output Loading Requirements
All models regulate within specification and are stable under no load to full
load conditions. Operation under no load might however slightly increase
output ripple and noise.
www.murata-ps.com
email: [email protected]
12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 6 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop
as the output current demand increases. If the output voltage drops too
low (approximately 98% of nominal output voltage for most models), the
magnetically coupled voltage used to develop primary side voltages will
also drop, thereby shutting down the PWM controller. Following a time-out
period, the PWM will restart, causing the output voltage to begin ramping
up to its appropriate value. If the short-circuit condition persists, another
shutdown cycle will initiate. This rapid on/off cycling is called “hiccup
mode”. The hiccup cycling reduces the average output current, thereby
preventing excessive internal temperatures and/or component damage. A
short circuit can be tolerated indefinitely.
The “hiccup” system differs from older latching short circuit systems
because you do not have to power down the converter to make it restart.
The system will automatically restore operation as soon as the short circuit
condition is removed.
Voltage Range Graph
Please observe the limits below for voltage input and output ranges. These
limits apply at all output currents.
6
5
4
Input Voltage (V)
Output Current Limiting
Current limiting inception is defined as the point at which full power falls
below the rated tolerance. See the Performance/Functional Specifications. Note particularly that the output current may briefly rise above its
rated value in normal operation as long as the average output power is
not exceeded. This enhances reliability and continued operation of your
application. If the output current is too high, the converter will enter the
short circuit condition.
Vin=2.4V / Vout=1.8V
3
2
1
Upper Limit
Lower Limit
0
0.5
1
1.5
2
2.5
3
3.5
Output Voltage (V)
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these
converters. These specifications vary depending on the solder type. Exceeding these
specifications may cause damage to the product. Your production environment
may differ therefore please thoroughly review these guidelines with your process
engineers.
Reflow Solder Operations for surface-mount products (SMT)
Remote On/Off Control
The remote On/Off Control can be ordered with either polarity. Please refer
to the Connection Diagram on page 1 for On/Off connections.
For Sn/Ag/Cu based solders:
Positive polarity models are enabled when the On/Off pin is left open or
is pulled high to +Vin with respect to –Vin. An internal bias current causes
the open pin to rise to +Vin. Positive-polarity devices are disabled when the
On/Off is grounded or brought to within a low voltage (see Specifications)
with respect to –Vin.
Maximum Peak Temperature
260 ºC.
Cooling Rate
Less than 3 ºC. per second
Negative polarity devices are on (enabled) when the On/Off is open or
brought to within a low voltage (see Specifications) with respect to –Vin.
The device is off (disabled) when the On/Off is pulled high with respect to
–Vin (see specifications).
Output Capacitive Load
These converters do not require external capacitance added to achieve
rated specifications. Users should only consider adding capacitance to
reduce switching noise and/or to handle spike current load steps. Install
only enough capacitance to achieve noise objectives. Excess external
capacitance may cause regulation problems, degraded transient response
and possible oscillation or instability.
Less than 1 ºC. per second
Time over Liquidus
45 to 75 seconds
For Sn/Pb based solders:
Preheat Temperature
Less than 1 ºC. per second
Time over Liquidus
60 to 75 seconds
Maximum Peak Temperature
235 ºC.
Cooling Rate
Less than 3 ºC. per second
Recommended Lead-free Solder Reflow Profile
Peak Temp.
235-260° C
250
200
Temperature (°C)
Dynamic control of the On/Off function should be able to sink appropriate
signal current when brought low and withstand appropriate voltage when
brought high. Be aware too that there is a finite time in milliseconds (see
Specifications) between the time of On/Off Control activation and stable,
regulated output. This time will vary slightly with output load type and current and input conditions.
Preheat Temperature
Reflow Zone
150
Soaking Zone
time above 217° C
45-75 sec
120 sec max
100
<1.5° C/sec
Preheating Zone
50
240 sec max
0
0
30
60
90
120
150
180
210
240
270
300
Time (sec)
High trace = normal upper limit
Low trace - normal lower limit
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 7 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 3.3V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=3.3V)
100
3.25
3
65 LFM
2.75
Output Current (Amps)
Efficiency (%)
95
VIN = 4V
VIN = 5V
VIN = 5.5V
90
2.5
2.25
2
1.75
1.5
1.25
85
0.5
1.0
1.5
2.0
2.5
1
20
3.0
25
Load Curre nt (Amps)
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=3.3V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=3.3V, Iout=3A, Cload=0)
Trace 4=Enable, Trace 2=Vout
Step Load Transient Response (Vin=5V, Vout=3.3V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=3.3V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 8 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 2.5V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=2.5V)
100
3.25
3
65 LFM
2.75
Output Current (Amps)
Efficiency (%)
95
VIN = 4V
VIN = 5V
90
VIN = 5.5V
2.5
2.25
2
1.75
1.5
1.25
85
0.5
1.0
1.5
2.0
Load Curre nt (Amps)
2.5
1
20
3.0
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=2.5V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=2.5V, Iout=3A, Cload=0)
Trace 4=Enable, Trace 2=Vout
Step Load Transient Response (Vin=5V, Vout=2.5V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=2.5V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 9 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.8V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=1.8V)
100
3.25
3
65 LFM
2.75
90
Output Current (Amps)
Efficiency (%)
95
VIN = 4V
VIN = 5V
VIN = 5.5V
2.5
2.25
2
1.75
85
1.5
1.25
80
0.5
1.0
1.5
2.0
Load Curre nt (Amps)
2.5
1
20
3.0
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=1.8V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=1.8V, Iout=6A, Cload=0)
Trace 4=Enable, Trace2=Vout
Step Load Transient Response (Vin=5V, Vout=1.8V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=1.8V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 10 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.5V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=1.5V)
100
3.25
3
65 LFM
2.75
Output Current (Amps)
Efficiency (%)
95
90
VIN = 4V
VIN = 5V
VIN = 5.5V
85
2.5
2.25
2
1.75
1.5
1.25
80
0.5
1.0
1.5
2.0
Load Curre nt (Amps)
2.5
1
20
3.0
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=1.5V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=1.5V, Iout=3A, Cload=0)
Trace 4=Enable, Trace 2=Vout
Step Load Transient Response (Vin=5V, Vout=1.5V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=1.5V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 11 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.2V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=1.2V)
100
3.25
3
65 LFM
2.75
Output Current (Amps)
Efficiency (%)
95
90
VIN = 4V
VIN = 5V
85
VIN = 5.5V
2.5
2.25
2
1.75
1.5
1.25
80
0.5
1.0
1.5
2.0
Load Curre nt (Amps)
2.5
1
20
3.0
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=1.2V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=1.2V, Iout=3A, Cload=0)
Trace 4=Enable, Trace 2=Vout
Step Load Transient Response (Vin=5V, Vout=1.2V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=1.2V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 12 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.0V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=1.0V)
100
3.25
3
65 LFM
2.75
Output Current (Amps)
Efficiency (%)
95
90
85
VIN = 4V
VIN = 5V
VIN = 5.5V
80
2.5
2.25
2
1.75
1.5
1.25
75
0.5
1.0
1.5
2.0
Load C urre nt (Amps)
2.5
3.0
1
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=1.0V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=1.0V, Iout=3A, Cload=0)
Trace 4=Enable, Trace 2=Vout
Step Load Transient Response (Vin=5V, Vout=1.0V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=1.0V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 13 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
PERFORMANCE DATA AND OSCILLOGRAMS
Efficiency vs. Line Voltage and Load Current @ +25˚C. (Vout = 0.6V)
Maximum Current Temperature Derating at Sea Level (Vin=5V, Vout=0.6V)
100
3.25
95
3
65 LFM
2.75
Output Current (Amps)
Efficiency (%)
90
85
80
VIN = 4V
75
VIN = 5V
VIN = 5.5V
2.5
2.25
2
1.75
1.5
70
1.25
65
0.5
1.0
1.5
2.0
Load Curre nt (Amps)
2.5
1
20
3.0
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Output Ripple and Noise (Vin=5V, Vout=0.6V, Iout=3A, Cload=0, ScopeBW=20MHz)
On/Off Enable Delay (Vin=5V, Vout=0.6V, Iout=3A, Cload=0)
Trace 4=Enable, Trace 2=Vout
Step Load Transient Response (Vin=5V, Vout=0.6V, Cload=0, Iout=1.5A to 3A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
Step Load Transient Response (Vin=5V, Vout=0.6V, Cload=0, Iout=3A to 1.5A)
Trace 2=Vout, 100 mV/div. Trace 4=Iout, 1A/div.
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 14 of 15
OKL-T/3-W5 Series
Programmable Output 3-Amp iLGA SMT PoLs
TAPE AND REEL INFORMATION
Tape Detail
7.40±0.1
A’
B-B’ SECTION
12.60±0.1
L00103
B
A
YMDX Rev.
L00103
YMDX Rev.
L00103
YMDX Rev.
Vacuum Pickup
Point in Center
0.40±0.05
(7.0º)
4.00±0.1
24.00+0.3
-0.1
16.00±0.1
B’
11.50±0.1
ø1.50+0.1
-0
1.75±0.1
Round
Sprocket
Holes
2.00±0.1
Pulling direction
12.60±0.1
(7.0º)
Notes
1) The radius (R) is 0.3mm max.
2) Cumulative tolerance of 10 pitches of the sprocket hole is ±0.2mm.
A-A’ SECTION
Reel Detail
Reel diameter 330.2
Start of
pocket tape
A
End of modules
C
B
Start of
modules
in pockets
Hub diameter 13.00
Start of
cover tape
Inner diameter 101.6
All dimensions are in millimeters.
Reel Information (400 units per reel)
Key
Description
Length (mm)
A
Tape trailer (no modules)
800 ±40
B
Pocket tape length before modules
200 min.
C
Cover tape length before pocket tape
240 ±40
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12 May 2010
MDC_OKL-T/3-W5 Series.A03 Page 15 of 15
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