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Murata |
www.murata-ps.com
OKY-T/3,T/5-D12 Series
Adjustable Output 3 and 5-Amp DOSA-SMT DC/DC Converters
Typical unit
PRODUCT OVERVIEW
The OKY-T/3 and -T/5 series are miniature
non-isolated Point-of-Load (POL) DC/DC power
converters for embedded applications. The module
is fully compatible with Distributed-power Open
Standards Alliance (DOSA) industry-standard
specifications (www.dosapower.com). Applications
include powering CPU’s, datacom/telecom systems,
programmable logic and mixed voltage systems.
The wide input range is 8.3 to 14 Volts DC. Two
maximum output currents are offered, 3 Amps (T/3
models) or 5 Amps (T/5 models). 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, over-current and over
temperature protections.
These units are designed to meet all standard
UL/EN/IEC 60950-1 safety and FCC EMI/RFI
emissions certifications and RoHS-6 hazardous
substance compliance.
FEATURES
■ Non-isolated SMT POL DC/DC power module
■ 8.3-14Vdc input voltage range
■ Programmable output voltage from 0.7525-5.5Vdc
■ 3 Amp (T/3) or 5 Amp (T/5) output current models
■ Drives 1000 μF ceramic capacitive loads
■ High power conversion efficiency 93% at 3.3 Vout
■ Outstanding thermal derating performance
■ Over temperature and over current protection
■ On/Off control
■ UL/EN/IEC 60950-1 safety
■ Industry-standard (DOSA) surface-mount package
■ RoHS-6 hazardous substance compliance
Contents
Description, Connection Diagram, Photograph
Ordering Guide, Model Numbering
Mechanical Specifications, Input/Output Pinout
Detailed Electrical Specifications
Output Voltage Adjustment, Soldering Guidelines
Technical Notes
Product Label
OKY-T/3-D12 Performance Data and Oscillograms
OKY-T/5-D12 Performance Data and Oscillograms
Tape and Reel Information
Page
1
2
3
4
5
6
8
9
15
21
Connection Diagram
+Vin
F1
On/Off
Control
External
DC
Power
Source
Open = On
Closed = Off
(Positive
On/Off)
Controller
t4XJUDIJOH
t'JMUFST
t$VSSFOU4FOTF
Reference and
Error Amplifier
Common
Figure 1. OKY-T/3, -T/5
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifications.
+Vout
Trim
Common
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_OKY-T/3,T/5-D12 Series.B15 Page 1 of 21
OKY-T/3,T/5-D12 Series
Adjustable Output 3 and 5-Amp DOSA-SMT DC/DC Converters
Performance Specifications Summary and Ordering Guide
ORDERING GUIDE
Output
Input
Package
Root Model ➁
VOUT
(Volts)
IOUT R/N (mVp-p)➄ Regulation (Max.)➂
(Amps Power
VIN Nom. Range
max) (Watts)
Max.
Line Load (Volts) (Volts)
OKY-T/3-D12N-C 0.75-5.5 ➆ 3
15
25 ±0.1% ±0.2% 12 8.3-14
OKY-T/3-D12P-C 0.75-5.5 ➆ 3
15
25 ±0.1% ±0.2% 12 8.3-14
OKY-T/5-D12N-C 0.75-5.5 ➅ 5
25
25 ±0.2% ±0.5% 12 8.3-14
OKY-T/5-D12P-C 0.75-5.5 ➅ 5
25
25 ±0.2% ±0.5% 12 8.3-14
IIN, IIN, Efficiency
no load full load
(mA) (Amps) Min. Typ.
80 1.34 91.5% 93%
80 1.34 91.5% 93%
80 2.24 91.5% 93%
80 2.24 91.5% 93%
Case C72 ➀
0.47 x 0.82 x 0.28
(11.9 x 20.8 x 7.0)
0.47 x 0.82 x 0.28
(11.9 x 20.8 x 7.0)
0.47 x 0.82 x 0.28
(11.9 x 20.8 x 7.0)
0.47 x 0.82 x 0.28
(11.9 x 20.8 x 7.0)
Pinout
P78
P78
P78
P78
➀ Dimensions are in inches (mm).
➁ These are partial model numbers. Please refer to the part number structure for complete ordering part numbers.
➂ All specifications are at nominal line voltage, Vout=nominal (5V for D12 models) and full load, +25 ˚C. unless
otherwise noted.
Output capacitors are 1 μF ceramic and 10 μF electrolytic in parallel. Input cap is 22 μF. See detailed specifica-
tions.
I/O caps are necessary for our test equipment and may not be needed for your application.
Vin must be 2V or higher than Vout for 3.3 to 5V outputs.
Ripple and Noise is shown at Vout=1V. See specs for details.
➅Max. VOUT = 5.1V at IOUT = 5A.
➆Max. VOUT = 5.1V at IOUT = 3A.
PART NUMBER STRUCTURE
OK Y - T / 5 - D12 N - C
Okami Non-isolated PoL
Surface Mount
Trimmable Output
Voltage Range
0.7525-5.5V
Special Customer Configuration part number:
OKY-T/5-D12N-C-CIS
Maximum Rated Output
Current in Amps
RoHS Hazardous
Substance Compliance
C = RoHS-6 (does not claim EU RoHS exemption
7b–lead in solder)
On/Off Polarity
P = Positive Polarity
N = Negative Polarity
Input Voltage Range
8.3-14V
Note: Some model number combinations
may not be available. Contact Murata
Power Solutions for availability.
www.murata-ps.com/support
MDC_OKY-T/3,T/5-D12 Series.B15 Page 2 of 21
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