Datasheet

ManualsBrandsMURATA POWER SOLUTIONS ManualsPSU ComponentsDC/DC converter (SMD) 5

The OKY-T/3 and -T/5 series are miniature non-

isolated Point-of-Load (POL) switch mode DC/DC

power converters for embedded applications. The

module is fully compatible with Distributed-power

Open Standards Alliance (DOSA) industry-standard

speciﬁ cations (www.dosapower.com). Applications

include powering CPU’s, datacom/telecom systems,

programmable logic and mixed voltage systems.

The wide input range is 2.4 to 5.5 Volts DC. Two

maximum output currents are offered, 3 Amps (T/3

models) or 5 Amps (T/5 models). Based on ﬁ xed-

frequency synchronous buck converter switching

topology, the high power conversion efﬁ cient 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 certiﬁ cations and RoHS-6 hazardous

substance compliance.

PRODUCT OVERVIEW

Connection Diagram

Figure 1. OKY-T/3, -T/5

Note: Murata Power Solutions strongly recommends an external input fuse, F1.

See speciﬁ cations.

External

Power

Source

On/Off

Control

CommonCommon

Open = On

Closed = Off

+Vin +Vout

Trim

Controller

Reference and

Error Ampliﬁer

t4XJUDIJOH

t'JMUFST

t$VSSFOU4FOTF

(Positive

On/Off)

FEATURES

■ Non-isolated SMT POL DC/DC power module

■ 2.4-5.5Vdc input voltage range

■ Programmable output voltage from 0.7525-3.63Vdc

■ 3 Amp (T/3) or 5 Amp (T/5) output current models

■ Drives 1000 µF ceramic capacitive loads

■ High power conversion efﬁ ciency at 96%

■ 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

Typical unit

Contents Page

Description, Connection Diagram, Photograph 1

Ordering Guide, Model Numbering, Product Label 2

Mechanical Speciﬁ cations, Input/Output Pinout 3

Detailed Electrical Speciﬁ cations 4

Output Voltage Adjustment, Soldering Guidelines 5

Technical Notes 6

OKY-T/3-W5 Performance Data and Oscillograms 9

OKY-T/5-W5 Performance Data and Oscillograms 13

Tape and Reel Information 19

Typical uni

OKY T/3, T/5-W5 Series

Adjustable Output 3 and 5-Amp DOSA-SMT PoLs

MDC_OKY-T/3,T/5-W5 Series.A12 Page 1 of 19

www.murata-ps.com

www.murata-ps.com/support

For full details go to

www.murata-ps.com/rohs

Summary of content (19 pages)

PAGE 1
OKY T/3, T/5-W5 Series www.murata-ps.com Adjustable Output 3 and 5-Amp DOSA-SMT PoLs PRODUCT OVERVIEW The OKY-T/3 and -T/5 series are miniature nonisolated Point-of-Load (POL) switch mode 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 2.
PAGE 2
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs Performance Speciﬁcations Summaryand Ordering Guide ORDERING GUIDE Output Root Model ➁ VOUT (Volts) Input Package R/N (mVp-p)➄ Regulation (Max.)➂ IOUT IIN, IIN, (Amps Power VIN Nom. Range no load full load max) (Watts) Max. Line Load (Volts) (Volts)  (mA) (Amps) Efﬁciency Min. Typ. OKY-T/3-W5N-C 0.7525-3.63 3 9.9 20 ±0.2% ±1.5% 5 2.4-5.5 45 2.1 92% 94.4% OKY-T/3-W5P-C 0.7525-3.63 3 9.9 20 ±0.2% ±1.5% 5 2.4-5.
PAGE 3
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs MECHANICAL SPECIFICATIONS TOP VIEW PIN #1 THIS CORNER (FARSIDE) 11.9 0.47 ISOMETRIC VIEW 10.67 0.420 REF NOZZLE PICKUP POINT PIN #1 5.64 0.222 REF 20.8 0.82 INPUT/OUTPUT CONNECTIONS OKY-T/3, -T/5 SIDE VIEW END VIEW 7.0 0.28 MTG PLANE Pin 1 2 3 4 5 Function On/Off Control* +VIN Ground (Common) Trim +VOUT *The Remote On/Off can be provided with either positive (P sufﬁx) or negative (N sufﬁx) polarity 1.59 0.
PAGE 4
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs Performance and Functional Speciﬁcations See Note 1 Input 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 Input Current: Full Load Conditions Inrush Transient Shutdown Mode (Off, UV, OT) Output in Short Circuit Low Line (Vin=Vmin) Environmental See Ordering Guide a
PAGE 5
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs Speciﬁcation Notes, Cont.: Soldering Guidelines (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.
PAGE 6
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs TECHNCIAL NOTES 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 current-limited. We recommend a time delay fuse installed in the ungrounded input supply line with a value which is approximately twice the maximum line current, calculated at the lowest input voltage.
PAGE 7
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs CAUTION: If you routinely or accidentally exceed these Derating guidelines, the converter may have an unplanned Over Temperature shut down. Also, these graphs are all collected at slightly above Sea Level altitude. Be sure to reduce the derating for higher density altitude. COPPER STRIP +OUTPUT C1 C2 SCOPE RLOAD -OUTPUT COPPER STRIP C1 = 0.1μF CERAMIC C2 = 10μF TANTALUM LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 4.
PAGE 8
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs 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.
PAGE 9
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/3-W5 PERFORMANCE DATA (Vout = 1.2V) OKY-T/3-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 1.2V) OKY-T/3-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 3.5 90 80 3.0 Natural convection VIN = 5.5V VIN = 5V VIN = 2.4V 60 50 2.5 Output Current (Amps) Efﬁciency (%) 70 40 30 2.0 1.5 1.0 20 0.5 10 0 0 0.5 1 1.5 2 2.5 3 3.
PAGE 10
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/3-W5 PERFORMANCE DATA (Vout = 1.5V) OKY-T/3-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 1.5V) OKY-T/3-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 3.5 100 VIN = 5.5V VIN = 5V VIN = 2.4V 60 Natural convection 2.5 Output Current (Amps) Efﬁciency (%) 3.0 80 40 2.0 1.5 1.0 20 0.5 0 0 0.5 1 1.5 2 2.5 3 3.5 Load Current (Amps) 0.
PAGE 11
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/3-W5 PERFORMANCE DATA (Vout = 1.8V) OKY-T/3-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 1.8V) OKY-T/3-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 3.5 3.0 80 VIN = 5.5V VIN = 5V VIN = 2.4V 60 Natural convection 2.5 Output Current (Amps) Efﬁciency (%) 100 40 20 2.0 1.5 1.0 0.5 0 0 0.5 1 1.5 2 2.5 Load Current (Amps) 3 3.5 0.
PAGE 12
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/3-W5 PERFORMANCE DATA (Vout = 2.5V) OKY-T/3-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 2.5V) OKY-T/3-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 3.5 95 3.0 Natural convection VIN = 5.5V VIN = 5V VIN = 3V 85 2.5 Output Current (Amps) Efﬁciency (%) 90 80 75 2.0 1.5 1.0 70 0.5 65 0 0.5 1 1.5 2 2.
PAGE 13
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/3-W5 PERFORMANCE DATA (Vout = 3.3V) On/Off Enable Startup (Vin=5.5V, Vout=3.3V, Iout=3A, Cload=0) Output Ripple and Noise (Vin=5V, Vout=3.3V, Iout=3A, Cload=0, ScopeBW=100MHz) Trace 4=Enable, Trace2=Vout Step Load Transient Response (Vin=5V, Vout=3.3V, Cload=0, Iout=1.5A to 3A) 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. Trace 2=Vout, 100 mV/div.
PAGE 14
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/5-W5 PERFORMANCE DATA (Vout = 1.2V) OKY-T/5-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 1.2V) OKY-T/5-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 Natural convection VIN = 5.5V VIN = 5V VIN = 2.4V 60 4.0 Output Current (Amps) Efﬁciency (%) 5.0 80 40 2.0 1.0 20 0 3.
PAGE 15
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/5-W5 PERFORMANCE DATA (Vout = 1.5V) OKY-T/5-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 1.5V) OKY-T/5-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 Natural convection VIN = 5.5V VIN = 5V VIN = 2.4V 60 4.0 Output Current (Amps) Efﬁciency (%) 5.0 80 40 3.0 2.0 1.0 20 0 20 0 0 1 2 3 4 Load Current (Amps) 5 On/Off Enable Startup (Vin=5.
PAGE 16
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/5-W5 PERFORMANCE DATA (Vout = 1.8V) OKY-T/5-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 1.8V) OKY-T/5-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 Natural convection VIN = 5.5V VIN = 5V VIN = 2.4V 60 4.0 Output Current (Amps) Efﬁciency (%) 5.0 80 40 2.0 1.0 20 0 3.
PAGE 17
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/5-W5 PERFORMANCE DATA (Vout = 2.5V) OKY-T/5-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 2.5V) OKY-T/5-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 95 5.0 Natural convection 4.0 VIN = 5.5V VIN = 5V VIN = 3V 85 Output Current (Amps) Efﬁciency (%) 90 80 75 3.0 2.0 1.
PAGE 18
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs OKY-T/5-W5 PERFORMANCE DATA (Vout = 3.3V) OKY-T/5-W5 Efﬁciency vs. Line Voltage and Load Current @ 25°C (VOUT = 3.3V) OKY-T/5-W5 Maximum Current Temperature Derating at Sea Level (VIN = 3.3 to 5V, VOUT = 0.75 to 3.3V, VIN>VOUT + 0.5V) 100 95 5.0 Natural convection 4.0 VIN = 5.5V VIN = 5V VIN = 3.8V 85 Output Current (Amps) Efﬁciency (%) 90 80 75 3.0 2.0 1.
PAGE 19
OKY T/3, T/5-W5 Series Adjustable Output 3 and 5-Amp DOSA-SMT PoLs TAPE AND REEL INFORMATION 2.33 0.092 (P/U) 16.00 0.630 44.00 1.732 6.86 0.270 ROUND HOLES 4.00 0.157 22.25 0.876 (P/U) 40.40 1.591 2.00 0.079 OBLONG HOLES FEED (UNWIND) DIRECTION ------- Dimensions are in inches (mm shown for ref. only). Third Angle Projection TOP COVER TAPE Tolerances (unless otherwise speciﬁed): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 1˚ Components are shown for reference only.