SIP, 0.41 x 0.40 x 0.24 inches (10.4 x 10.16 x 6.1 mm)
Certified to UL/EN/IEC 60950-1 safety standards,
2nd edition
RoHS-6 hazardous substance compliance
PRODUCT OVERVIEW
The OKR-T/1.5-W12-C is a miniature SIP non-isolated Point-of-Load (PoL) DC/DC power converter
measuring only 0.41 x 0.40 x 0.24 inches (10.4 x 10.16 x 6.1 mm). The wide input range is 4.5 to 14 Volts
DC. Based on 600 KHz synchronous buck topology, the high power conversion efficient Point of Load (PoL)
module features programmable output voltage and On/Off control, under voltage lock out (UVLO), overcur-
rent and over temperature protections. These units are certified to UL/EN/ IEC 60950-1 safety standards
(2nd edition) and RoHS-6 hazardous substance compliance.
Figure 1. Connection Diagram
+Vin
F1
Rp
External
DC
Power
Source
On/Off
Control
Controller
• Switching
• Filters
• Current Sense
Trim
Q1
Reference and
Error Amplifier
+Vout
Common
Common
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_OKR-T/1.5-W12-C.A04
Page 1 of 16
OKR-T/1.5-W12-C
Adjustable Output 1.5-Amp
SIP-mount
DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Input
I
in
,
I
in
,
no load full load
(mA)
(Amps)
80
0.672
Efficiency
Min.
91%
Typ.
93%
Dimensions (Inches)
0.41x0.40x0.24
Root Model
OKR-T/1.5-W12-C
R/N (mVp-p) Regulation (Max.)
I
out
V
out
(Amps Power
V
in
Nom. Range
(Volts) max) (Watts)
(Volts) (Volts)
Max.
Line
Load
0.591-6
1.5
7.5
25
±0.3%
±0.5%
12
4.5-14
➀
For Vout ≥ 3.3V, Vin should be ≥ (Vout ÷ 0.85) + 0.5V.
➁
All specifications are at nominal line voltage, Vout=nominal (5V for W12 models) and full load, +25°C unless
otherwise noted.
➂
Ripple and Noise (R/N) is shown at Vout=1V. See specs for details.
PART NUMBER STRUCTURE
OK R
-
T
/
1.5
-
W12
-
C
Okami Non-isolated PoL
RoHS Hazardous
Substance Compliance
C
= RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder)
Wide Input Voltage Range
W12
= 4.5 – 14 Volts
SIP-Mount
Output Voltage Range
T = Trimmable, 0.591-6 Volts
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 dif-
fers from the product photograph on page 1. Here is the layout of the label:
Model Number
OKR-T/1.5-W12-C
Product Code
54733
The manufacturing date code is four characters:
First character – Last digit of manufacturing year, example 2009
Second character – Month code (1 through 9 = Jan-Sep;
O, N, D = Oct, Nov, Dec)
Third character – Day code (1 through 9 = 1 to 9, 10 = 0 and
11 through 31 = A through Z)
Fourth character – Manufacturing information
Mfg.
date
code
XXXXXX
YMDX Rev.
Product code
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
www.murata-ps.com/support
MDC_OKR-T/1.5-W12-C.A04
Page 2 of 16
OKR-T/1.5-W12-C
Adjustable Output 1.5-Amp
SIP-mount
DC/DC Converters
FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Minimum
Typical/Nominal
Maximum
Units
Conditions
➀
Input Voltage, Continuous
Full power operation
0
15
Vdc
Input Reverse Polarity
None, install external fuse
None
Vdc
On/Off Remote Control
Power on or off, referred to -Vin
0
14
Vdc
Output Power
0
7.5
7.65
W
Output Current
Current-limited, no damage, short-circuit protected
0
1.5
A
Storage Temperature Range
Vin = Zero (no power)
-55
125
°C
Absolute maximums are stress ratings. Exposure of devices to greater than 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 or recommended.
INPUT
Operating voltage range
Vin≥Vout+2V for 3.3V and 5V
4.5
12
14
Vdc
Recommended External Fuse
Fast blow
3
A
Turn On/Start-up threshold
Rising input voltage
3.9
4.2
4.4
Vdc
Turn Off/Undervoltage lockout
15
Falling input voltage
3
3.4
3.7
Vdc
Reverse Polarity Protection
None, install external fuse
None
Vdc
Internal Filter Type
C-TYPE
Input current
Full Load Conditions
Vin = nominal (5Vo set)
0.672
0.701
A
Low Line
Vin @ min, 5 Vout
1.122
1.163
A
Inrush Transient
0.4
A
2
-Sec.
Short Circuit Input Current
60
mA
No Load Input Current
5Vout, Iout @ 0
80
100
mA
No Load Input Current
0.59V, Iout @ 0
40
55
Shut-Down Mode Input Current
5
mA
Measured at input with specified filter
20
mA, pk-pk
Reflected (back) ripple current
➁
GENERAL and SAFETY
@ Vin nom, 5Vout
91
93
%
@ Vin min, 5Vout
94
95.5
%
@ Vin nom, 3.3Vout
88.5
90
%
@ Vin nom, 2.5Vout
86
88
%
Efficiency
@Vin nom, 1.8Vout
82.5
84.5
%
@Vin nom, 1.5Vout
80
82.5
%
@Vin nom, 1.2Vout
77
79
%
@Vin nom, 1Vout
74
76
%
Certified to UL-60950-1, IEC/EN60950-1,
Safety
Yes
2nd Edition
Per Telcordia SR332, issue 1, class 3, ground
10.7
Hours x 10
6
Calculated MTBF
➃
fixed, Tambient=+25°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
600
KHz
Power On to Vout regulated
Startup Time
6
mS
(100% resistive load)
Startup Time
Remote ON to 10% Vout (50% resistive load)
6
8
mS
50-100-50% load step, settling time to within
Dynamic Load Response
50
100
µSec
±2% of Vout di/dt = 2.5 A/µSec
Dynamic Load Peak Deviation
same as above
100
200
mV
FEATURES and OPTIONS
Remote On/Off Control
➄
NOTE: A 49.2KΩ pulldown to ground needed.
Positive Logic, ON state
Pin open=ON
2
+Vin
V
Positive Logic, OFF state
0
0.2
V
Control Current
open collector/drain
1
mA
www.murata-ps.com/support
MDC_OKR-T/1.5-W12-C.A04
Page 3 of 16
OKR-T/1.5-W12-C
Adjustable Output 1.5-Amp
SIP-mount
DC/DC Converters
FUNCTIONAL SPECIFICATIONS (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage Range
13
Setting Accuracy
Output Voltage Overshoot - Startup:
Current
Output Current Range
Minimum Load
Current Limit Inception
➅
Short Circuit
Short Circuit Current
➆
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Regulation
➉
Total Regulation Band
Line Regulation
Load Regulation
Ripple and Noise
➇
Temperature Coefficient
Maximum Capacitive Loading
Maximum Capacitive Loading
MECHANICAL
Outline Dimensions
Weight
Pin Material
Pin Finish
ENVIRONMENTAL
Operating Ambient Temperature Range
➈
Operating PCB Temperature
12
Storage Temperature
Thermal Protection/Shutdown
full power, all output voltages,
see derating curves
No derating
Vin = Zero (no power)
Measured in center
-40
-40
-55
130
85
100
125
135
°C
°C
°C
°C
Conditions
➀
Minimum
0
0.591
-2
Typical/Nominal
7.5
Maximum
7.65
6
2
1
1.5
No minimum load
4.15
0.6
Continuous
1.5
5.15
Units
W
Vdc
% of Vnom.
%Vo nom
A
A
A
See trim formula
At 50% load
0
98% of Vnom., after warmup @5Vout
Hiccup technique, autorecovery within
±1% of Vout
Output shorted to ground, no damage
Current limiting
Over all line, load and temp conditions
Vin=min. to max. Vout=nom.
Iout=min. to max. Vin=48V.
5Vo, 12Vin
3.3Vo, 12Vin
1.8Vo, 12Vin
1Vo, 12Vin
At all outputs
low ESR; >0.001, <0.01 ohm
0.01 ohm
-3
2.65
Vo set
3
±0.3
±0.5
75
60
40
25
14
±0.02
200
1000
0.41x0.40x0.24
10.4x10.2x6.1
0.07
2
copper alloy
2.54-7.62
1.9-3.81
% Vo set
%
%
mV pk-pk
mV pk-pk
mV pk-pk
mV pk-pk
% of Vnom./°C
μF
μF
Inches
mm
Ounces
Grams
µm
µm
Tin
Nickel
130
Notes:
➀
Specifications are typical at +25 deg.C, Vin=nominal (+12V.), Vout=nominal (+5V), full load, external caps and
natural convection unless otherwise indicated. Extended tests at higher power must supply substantial forced
airflow. All models are tested and specified with external 1 μF paralleled with 10 μF 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 applica-
tions. However, Murata Power Solutions recommends installation of these capacitors. All models are stable and
regulate within spec under no-load conditions.
Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin=2 x 100
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