BCP-3.3/15-2.5/15-D24N-C [MURATA]

DC-DC Regulated Power Supply Module, 2 Output, Hybrid, ROHS COMPLIANT, HALF BRICK PACKAGE-10;
BCP-3.3/15-2.5/15-D24N-C
型号: BCP-3.3/15-2.5/15-D24N-C
厂家: muRata    muRata
描述:

DC-DC Regulated Power Supply Module, 2 Output, Hybrid, ROHS COMPLIANT, HALF BRICK PACKAGE-10

文件: 总7页 (文件大小:200K)
中文:  中文翻译
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Dual Output BCP Models  
s
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
FEATURES  
PRODUCT OVERVIEW  
Independent 3.3V and 2.5V outputs  
Murata Power Solutions' BCP "half-brick" series  
has expanded to include dual-output, 3.3V and  
2.5V DC/DC converters. The BCP-3.3/15-2.5/15-  
D24 (18-36V input) and BCP-3.3/15-2.5/15-D48  
(36-75V input) are fully isolated DC/DC convert-  
ers housed in standard "half-brick" packages  
(2.3" x 2.4" x 0.5"). These BCP’s can support  
any combination of 3.3V and 2.5V loading up to  
a combined total of 15 Amps. Both outputs are  
fully isolated (1500Vdc) and independently line  
( 0.2ꢀ) and load ( 0.5ꢀ) regulated.  
protection, current limiting, and thermal shut-  
down. Each has an on/off control function (positive  
and negative logic versions available), and both  
output voltages can be trimmed independently.  
BCP Model DC/DCs deliver low noise (50mVp-p),  
efficiency of 84ꢀ and are fully specified for –40 to  
+100°C operation. Utilization of metal baseplate  
technology with threaded inserts permits easy  
heat-sink attachment and/or pcb mounting. These  
devices meet UL1950 and IEC/EN60950-1 safety  
standards, including BASIC insulation require-  
ments. CB reports are available on request. "D48"  
models are CE marked (meet the requirements  
of LVD).  
Up to 15 Amps per output  
Each output fully regulated  
No minimum load requirements  
50 Watts total output power  
Standard "half-brick" package  
UL1950 and IEC/EN60950-1 safety  
approvals (BASIC insulation)  
Fully isolated, 1500Vdc guaranteed  
Both BCP models feature input pi filters, input  
undervoltage and overvoltage shutdown, input  
reverse-polarity protection, output overvoltage  
18-36V or 36-75V input ranges  
mark available (75V-input models)  
Input under and overvoltage shutdown  
Continuous short-circuit protection  
Thermal shutdown  
+3.3V OUTPUT  
(7)  
+INPUT  
(4)  
SWITCH  
CONTROL  
3.3V RETURN  
(6)  
+2.5V OUTPUT  
(10)  
–INPUT  
(1)  
2.5V RETURN  
(9)  
REFERENCE  
& ERROR AMP  
ON/OFF  
CONTROL  
(3)  
REGULATOR  
2.5V TRIM  
(8)  
PWM  
OPTO  
REFERENCE  
CONTROLLER  
ISOLATION  
& ERROR AMP  
3.3V TRIM  
(5)  
UV & OV  
COMPARATORS  
THERMAL  
Typical typology is shown.  
SHUTDOWN  
For full details go to  
www.murata-ps.com/rohs  
Figure 1. Simplified Schematic  
www.murata-ps.com/support  
MDC_BCP Models.B05 Page 1 of 7  
Dual Output BCP Models  
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
Performance Specifications and Ordering Guide  
ORDERING GUIDE  
Output  
R/N (mVp-p) ➁  
Input  
Regulation (Max.) ➂  
Efficiency ➅  
VOUT  
(Volts) (Amps)  
IOUT  
VIN Nom.  
(Volts)  
Range  
(Volts)  
IIN ➃  
(mA/A)  
Package  
(Case, Pinout)  
Models ➆  
Typ.  
50  
Max.  
100  
100  
100  
100  
Line  
Load  
0.5ꢀ  
0.5ꢀ  
0.5ꢀ  
0.5ꢀ  
Min.  
Typ.  
3.3  
2.5  
3.3  
2.5  
15  
15  
15  
15  
0.2ꢀ  
0.2ꢀ  
0.2ꢀ  
0.2ꢀ  
BCP-3.3/15-2.5/15-D24  
24  
48  
18-36  
36-75  
0.2/2.52  
0.1/1.26  
82ꢀ  
82ꢀ  
84ꢀ  
C30, P90  
C30, P90  
50  
50  
BCP-3.3/15-2.5/15-D48  
84ꢀ  
50  
Typical at TA = +25°C under nominal line voltage and balanced "full-load" (3.3V @7.5A, 2.5V @ 7.5A)  
conditions unless otherwise noted.  
Ripple/Noise (R/N) measured over a 20MHz bandwidth. All models are specified with 22µF,  
low-ESR, input capacitor and 10µF tantalum in parallel with 1µF ceramic output capacitors.  
No load to 100% load, other output at no-load.  
Nominal line voltage, no-load/3.3V at full-load condition.  
Current from either output at maximum value, or both outputs to a combined total of 15 A.  
3.3V at full-load condition.  
These are not complete model numbers. Please refer to the Part Number Structure when ordering.  
Part Number Structure  
Optional Functions  
BCP 50 Watt DC/DC's are designed with an On/Off Control function, with  
either positive polarity (no suffix) or negative polarity ("N"suffix), in the  
BCP - 3.3 - 15 - 2.5 / 15 - D48 N LX - C  
RoHS Hazardous  
Substance Compliant  
Dual Output/  
Standard Half-Brick Package  
pin 3 position.  
See Optional Functions  
V1 Nominal Output Voltage: 3.3 Volts  
I1 Maximum Output Current: 15A  
Blank On/Off Control function (positive polarity) on pin 3  
Input Voltage Range:  
D24 = 18-36 Volts (24V nominal)  
D48 = 36-75 Volts (48V nominal)  
N
On/Off Control function (negative polarity) on pin 3  
Pin length: 0.110 inches (2.79mm) 0.010. Quantity order only.  
Pin length: 0.145 inches (3.68mm) 0.010. Quantity order only.  
RoHS-6 compliance  
L1  
L2  
-C  
I2 Maximum Output Current: 15A  
V2 Nominal Output Voltage: 2.5 Volts  
Note: Not all model number combinations are available. Contact MPS.  
Mechanical Specifications  
2.30  
(58.42)  
METAL BASEPLATE  
PLASTIC SHELL  
0.50  
Case C30  
(12.70)  
0.040 0.002 DIA.  
(1.016 0.051)  
0.20 MIN  
(5.08)  
0.20  
(5.08)  
1.90  
(48.26)  
Dimensions are in inches (mm) shown for ref. only.  
10  
Third Angle Projection  
1
2
9
8
2.00  
1.40  
1.600 2.40  
(50.80) (35.56)  
(40.64) (60.96)  
1.300  
(33.02)  
1.00  
(25.40)  
7
6
5
1.000  
(25.40)  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
.XXX 0.010 (0.25)  
Angles 2ꢁ  
3
4
0.40  
(10.16)  
0.600  
0.300 (15.24)  
(7.62)  
(4) THREADED INSERTS  
#M3 THD THRU  
0.200  
(5.08)  
Components are shown for reference only.  
0.30  
(7.62)  
BOTTOM VIEW  
0.20  
(5.08)  
Dimensions are in inches (MM)  
www.murata-ps.com/support  
Dimensions in inches(mm)  
MDC_BCP Models.B05 Page 2 of 7  
Dual Output BCP Models  
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
Mechanical Specifications (continued)  
Optional Heat Sink (Part Number HS-CPLP2) *  
3.50  
(88.90)  
0.20  
(5.08)  
2.000  
(50.80)  
0.75  
(19.05)  
I/O Connections  
Pin Function P39  
Pin  
Function P39  
3.3V Return  
+3.3V Output  
2.5V Trim  
1
2
3
4
5
–Input  
Case (Baseplate)  
On/Off Control  
+Input  
6
7
8
9
2.5V Return  
+2.5V Output  
3.3V Trim  
10  
1.900  
(48.26) (58.42)  
2.30  
* Note: When mounting the heat sink to the BCP converter:  
1. Maximum applied torque is 6 in-lbs.  
2. Minimum thread engagement of the mounting screws is 12mm deep.  
Dimensions are in inches (mm) shown for ref. only.  
Third Angle Projection  
0.140 THRU AND COUNTERSINK  
90° TO 0.26 (4 PLACES)  
MATERIAL: BLACK ANODIZED ALUMINU  
0.47  
(11.94)  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
0.16  
(4.06)  
.XXX 0.010 (0.25)  
Angles 2ꢁ  
2.48  
(62.99)  
Components are shown for reference only.  
Optional Heat Sink (Part Number HS-CP) *  
0.50 (12.70) TYP.  
2.30  
051 (12.95) MAX.  
(58.42)  
0.10  
1.90  
0.20  
(2.54)  
(48.26)  
(5.08)  
2.00  
2.40  
(50.80) (60.96)  
Top View  
0.20  
(5.08)  
MATERIAL: BLACK ANODIZED ALUMINUM  
4 MOUNTING SCREWS AND 0.009 (0.229)  
THICK THERMAL PAD INCLUDED  
0.147 DIA. (3.734)  
(4 PLACES)  
www.murata-ps.com/support  
MDC_BCP Models.B05 Page 3 of 7  
Dual Output BCP Models  
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
Performance/Functional Specifications  
Typical @ TA = +25°C under nominal line voltage, balanced "full-load" conditions, unless noted. ➀  
Input  
Dynamic Characteristics  
Input Voltage Range:  
D24 Models  
D48 Models  
Dynamic Load Response:  
3.3V (50-100% load step to 2% VOUT) 300µsec maximum  
2.5V (50-100% load step to 2% VOUT) 300µsec maximum  
18-36 Volts (24V nominal)  
36-75 Volts (48V nominal)  
Overvoltage Shutdown:  
D24 Models  
D48 Models  
Start-Up Time:  
VIN to VOUT  
50 msec maximum  
25 msec maximum  
40-43 Volts (41.5V typical)  
77-80 Volts (78.5V typical)  
On/Off to VOUT  
Start-Up Threshold:  
D24 Models  
D48 Models  
Switching Frequency  
300kHz ( 50kHz)  
16.5-18 Volts (17.5V typical)  
33.5-36 Volts (34.5V typical)  
Environmental  
MTBF  
D24 Models  
D48 Models  
Bellcore, ground fixed, controlled  
TBD hours (case @ TBD °C)  
TBD hours (case @ TBD °C)  
Undervoltage Shutdown:  
D24 Models  
D48 Models  
15-17.5 Volts (16.5V typical)  
30.5-33.5 Volts (32V typical)  
Operating Temperature (Ambient):  
θ Case to Ambient, No heatsink  
Without Derating  
Input Current:  
TBD °C/Watt  
Normal Operating Conditions  
D24 Models  
D48 Models  
See Ordering Guide  
3.06 Amps maximum  
1.53 Amps maximum  
–40 to +32°C (without heat sink)  
To +100°C (See Derating Curves)  
With Derating  
Case Temperature:  
Maximum Allowable  
For Thermal Shutdown  
Standby Mode:  
Off, OV, UV, Thermal Shutdown  
+100°C  
+100°C minimum, +110°C maximum  
10mA typical  
Input Reflected Ripple Current:  
Source Impedance <0.1Ω  
22µF Low-ESR Capacitor  
Storage Temperature  
–40 to +120°C  
88mArms, 250mAp-p maximum  
Pi (0.47µF-4.7µH-3.3µF)  
Physical  
Input Filter Type  
Dimensions  
2.3" x 2.4" x 0.5" (58.4 x 61 x 12.7mm)  
Pin 2  
Reverse-Polarity Protection:  
D24 Models  
D48 Models  
Case (Baseplate) Connection  
1 minute duration, 6A maximum  
1 minute duration, 3A maximum  
Case/Pin Material  
Diallyl phthalate, UL94V-0 rated, aluminum  
baseplate; plated copper alloy pins  
On/Off Control: (Pin 3) ➂ ➄  
D24 & D48 Models  
On = open or 13V - +VIN, IIN = 1mA max.  
Off = 0-0.8V, IIN = 2mA max.  
On = 0-0.8V, IIN = 1mA max.  
Weight  
4.2 ounces (118 grams)  
Primary to Secondary Insulation Level Basic  
D24N & D48N Models  
Balanced, full-load = 3.3 @ 7.5A and 2.5V @ 7.5A. Models are specified with an external 22µF,  
low-ESR, input capacitor and 10µF tantalum in parallel with 1µF ceramic output capacitors.  
See Technical Notes for details.  
Off = open or 2.5 - +VIN, IIN = 50µA max.  
Output  
Devices may be ordered with negative logic (pin 3 open = off). See Part Number Structure  
and Technical Notes for additional information.  
VOUT Accuracy  
3.3V Output  
2.5V Output  
2% maximum  
2% maximum  
Output noise may be further reduced with the installation of additional external output  
capacitors. See Technical Notes.  
These signals must be referenced to the input return pin (–VIN).  
Demonstrated MTBF available on request.  
Minimum Loading per Specification  
No load  
Ripple/Noise (20MHz BW)  
Line/Load Regulation  
Efficiency  
See Ordering Guide  
See Ordering Guide  
See Ordering Guide and Efficiency Curves  
5% independent  
Absolute Maximum Ratings  
Input Voltage:  
Continuous:  
Trim Range  
D24 Models  
D48 Models  
43 Volts  
87 Volts  
50 Volts  
100 Volts  
Isolation Voltage:  
Input-to-Baseplate  
Input-to-Baseplate  
Output-to-Case  
1500Vdc minimum  
1000Vdc minimum  
1000Vdc minimum  
Transient (100msec): D24 Models  
D48 Models  
On/Off Control  
+15 Volts  
Isolation Capacitance  
Isolation resistance  
560pF  
Input Reverse-Polarity Protection  
Input Current must be limited. 1 minute  
duration. Fusing recommended.  
100MΩ  
Current Limit Inception:  
3.3V @ 98% VOUT (2.5V @ no-load)  
2.5V @ 98% VOUT (3.3V @ no-load)  
D24 Models  
D48 Models  
6 Amps  
3 Amps  
17-22 Amps  
17-22 Amps  
Output Overvoltage Protection ➁  
3.3V Outputs  
2.5V Outputs  
Short Circuit Current  
Constant current 25A, indefinite  
0.02% per °C  
4.0 Volts, comparator  
3.25 Volts, comparator  
Temperature Coefficient  
Output Current ➁  
Current limited. Devices can withstand  
an indefinite output short circuit.  
Overvoltage Protection:  
3.3V Output  
2.5V Output  
Comparator  
4.0 Volts  
3.25 Volts  
Storage Temperature  
Lead Temperature  
–40 to +120°C  
See Soldering Guidelines  
These 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.  
www.murata-ps.com/support  
MDC_BCP Models.B05 Page 4 of 7  
Dual Output BCP Models  
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
TECHNICAL NOTES  
Input voltages exceeding the input overvoltage shutdown specification  
listed in the Performance/Functional Specifications will cause the device to  
shutdown. A built-in hysteresis (2V typical for "D24" models, 4V typical for  
"D48" models) will not allow the converter to restart until the input voltage is  
sufficiently reduced.  
3.3V & 2.5V Outputs/Returns  
The BCP Series outputs (pins 7 & 10) and returns (pins 6 & 9) are isolated  
from the +VIN and –VIN inputs (pins 4 & 1) via a transformer and opto-coupled  
transistors.  
Start-Up Time  
The 3.3V Return (pin 6) and 2.5V Return (pin 9) are connected internal to the  
DC/DC converter. Though the returns are common within the DC/DC converter,  
the regulating control loop for each output is sensed directly at its respective  
output and return pins.To maintain optimum regulation when a ground plane is  
not used, it is critical that PC board layouts return each output to its corre-  
sponding return pin.  
The VIN to VOUT start-up time is the interval between the time at which a ramp-  
ing input voltage crosses the turn-on threshold point and the fully-loaded  
output voltage enters and remains within its specified accuracy band. Actual  
measured times will vary with input source impedance, external input capaci-  
tance, and the slew rate and final value of the input voltage as it appears to the  
converter.  
Filtering and Noise Reduction  
The On/Off to VOUT start-up time assumes the converter has its nominal  
input voltage applied but is turned off via the On/Off Control. The specification  
defines the interval between the time at which the converter is turned on and  
the fully loaded output voltage enters and remains within its specified accuracy  
band.  
All BCP DC/DC Converters achieve their rated ripple and noise specifications  
using the external input and output capacitors specified in the Performance/  
Functional Specifications table. In critical applications, input/output noise may  
be further reduced by installing additional external I/O caps. Input capacitors  
should be selected for bulk capacitance, low ESR and high rms-ripple-current  
ratings. Input capacitors serve as energy-storage devices to minimize varia-  
tions in line voltage caused by transient IR drops in PCB conductors from  
backplane to the DC/DC. Output capacitors should be selected for low ESR and  
appropriate frequency response. All caps should have appropriate voltage rat-  
ings and be mounted as close to the converters as possible.  
On/Off Control (Standard feature)  
The On/Off Control (pin 3) may be used for remote on/off operation. As shown  
in Figure 1A, the control pin is referenced to the –Input (pin 1). The standard  
BCP converter (no suffix) is designed so that it is enabled when the control pin  
is left open and disabled when the control pin is pulled low (to less than +0.8V  
relative to –Input).  
The most effective combination of external I/O capacitors will be a function  
of your particular load and layout conditions.  
Dynamic control of the on/off function is best accomplished with a mechani-  
cal relay or an open-collector/open-drain drive circuit (optically isolated if  
appropriate). The drive circuit should be able to sink approximately 1mA for  
logic low.  
Input Fusing  
Certain applications and/or safety agencies may require the installation of  
fuses at the inputs of power conversion components. Fuses should also be  
used if the possibility of sustained, non-current-limited, input-voltage polarity  
reversals exists. For MPS BCP DC/DC Converters, you should use slow-blow  
type fuses with values no greater than the following.  
The on/off control function is designed such that the converter can be  
disabled (pin 3 pulled low for no-suffix models) while input power is ramping  
up and then "released" once the input has stabilized.  
For BCP converters configured with a negative-polarity option ("N" suffix  
added to part number), operation is opposite to that described above. The  
converter is disabled when the On/Off Control pin is left open and enabled  
when pulled low.  
VIN Range  
"D24" Models  
"D48" Models  
Fuse Value  
6 Amps  
3 Amps  
Fuses should be installed in the +Input line.  
Input Overvoltage/Undervoltage Shutdown and Start-Up Threshold  
Under normal start-up conditions, devices will not begin to regulate until the  
ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for  
"D48" models). Once operating, devices will not turn off until the input voltage  
drops below the Undervoltage Shutdown limit (32V for "D48" models). Subse-  
quent re-start will not occur until the input is brought back up to the Start-Up  
Threshold. This built-in hysteresis prevents any unstable on/off situations from  
occurring at a single voltage.  
+Vcc  
+Vcc  
3
1
3
1
+13V  
+3V  
ON/OFF  
CONTROL  
ON/OFF  
CONTROL  
–INPUT  
–INPUT  
Figure 1A. No Suffix  
Figure 1B. "N" Suffix  
www.murata-ps.com/support  
MDC_BCP Models.B05 Page 5 of 7  
Dual Output BCP Models  
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
Output Overvoltage Protection  
Heat Sinks for BCP Series  
Each voltage output of the BCP Series converter is independently monitored via MPS offers two standard heat sinks that can be mounted to the half-brick  
an output comparator. If the output voltage should rise to a level which could  
be damaging to the load circuitry (see Performance/Functional Specifications  
for limits), the overvoltage circuitry will power down the PWM controller caus-  
ing the output voltages to collapse. Following a time out period the converter  
will restart. If the fault condition persists the PWM will again power down and  
the cycle will repeat. This on/off cycling is referred to as a "hiccup-mode."  
package to extend the converter's operating temperature range. Along with the  
standard 2.3" x 2.4" x 0.5" (HS-CP) heat sink, MPS has designed a low-profile  
heat sink for height-restricted applications. This new heat sink (HS-CPLP2)  
is designed with radiant fins that extend 0.51" beyond either side of the 2.4"  
dimension of the BCP package. The convenience of this design is that the finned  
extensions protrude only 0.31" below the top surface of the DC/DC converter,  
allowing components with a profile height less than 0.2" to be mounted on  
the pc board below the heat sink. Therefore, while the surface area of the low-  
profile heat sink measures 2.3" x 3.5", pcb real estate is unaffected.  
Case Connection  
BCP DC/DC's do not connect the metal baseplate to an internal voltage. The  
"uncommitted" baseplate is connected to pin 2 which, depending upon your  
system configuration, should be connected to either +Input (pin 4), –Input (pin  
1), Output Return (pins 6 & 9), or earth ground.  
For optimum thermal performance in a natural convection application, the  
low-profile heat sink should be mounted with the fins vertically oriented. Both  
models are shipped with 0.009" self-adhesive thermal pad and mounting  
screws.  
Thermal Shutdown  
The BCP Series is equipped with Thermal Shutdown circuitry. If environmental  
conditions cause the internal temperature of the DC/DC converter to rise  
above the designed operating temperature (see Performance/Functional Speci-  
fications), a precision temperature sensor will power down the unit. When the  
internal temperature decreases below the threshold of the temperature sensor  
the unit will self-start.  
Note: When mounting the heat sink to the BCP converter:  
1. Maximum applied torque is 2 in-lbs.  
2. Minimum thread engagement of the mounting screws is  
12mm deep.  
6
Input Reverse-Polarity Protection  
5
Upon applying a reverse-polarity voltage to the DC/DC converter, an internal  
diode will be forward biased and draw excessive current from the power  
source. Therefore, it is required that the input current be limited be either an  
appropriately rated input fuse or a current limited power source.  
4
HS-CPLP2  
3
HS-CP  
2
Threaded Inserts and Heatsink Installation  
CAUTION: Do not use the threaded inserts to bolt the converter down to a PC  
board. That will place unnecessary force on the mounting pins. Instead, the  
converter is held securely by only soldering the mounting pins.  
1
0
0
100  
200  
300  
400  
500  
600  
700  
When attaching the heat sink from above the converter, use a maximum  
torque of 2 inch-pounds (0.23 N-m) on the M3 bolts to avoid damaging the  
threaded inserts. Use a tiny amount of fastener adhesive or M3 lockwashers to  
secure the bolts.  
AIR VELOCITY (FT./MIN.)  
Figure 2. HS-CP and HS-CPLP2 Heat Sink Performance Vs. Air Flow  
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. Be cautious when there is high atmo-  
spheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your  
production environment may differ; therefore please thoroughly review these guidelines  
with your process engineers.  
Wave Solder Operations for through-hole mounted products (THMT)  
For Sn/Ag/Cu based solders:  
Maximum Preheat Temperature  
Maximum Pot Temperature  
Maximum Solder Dwell Time  
For Sn/Pb based solders:  
Maximum Preheat Temperature  
Maximum Pot Temperature  
Maximum Solder Dwell Time  
115° C.  
270° C.  
7 seconds  
105° C.  
250° C.  
6 seconds  
www.murata-ps.com/support  
MDC_BCP Models.B05 Page 6 of 7  
Dual Output BCP Models  
3.3 and 2.5V, Half-Brick  
50 Watt DC/DC Converters  
Output Trimming  
10  
Both the 3.3V and 2.5V outputs of the BCP Series can be independently  
trimmed via a trimpot (Figure 3A) or a single fixed resistor as shown (Figures 3B  
& 3C). The trimpot can be used to determine the value of a single fixed resistor.  
A single fixed resistor can increase or decrease the output voltage depend-  
ing on its connection. Fixed resistors should have absolute TCR’s less than  
100ppm/°C to ensure stability  
+2.5V OUTPUT  
8
2.5V TRIM  
+2.5V  
LOAD  
+2.5V  
TRIM  
UP  
1
4
–INPUT  
+INPUT  
9
7
5
2.5V RETURN  
+3.3V OUTPUT  
3.3V TRIM  
+3.3V  
LOAD  
+3.3V  
TRIM  
UP  
10  
+2.5V OUTPUT  
6
3.3V RETURN  
20kΩ  
8
+2.5V  
LOAD  
2.5V TRIM  
5-22  
1
4
–INPUT  
+INPUT  
TURNS  
9
7
Figure 3B. Increase Output Voltage Trim Connections Using a Fixed Resistor  
2.5V RETURN  
+3.3V OUTPUT  
20kΩ  
5-22  
TURNS  
A single resistor connected from the Trim Pin (pin 5 for 3.3V trim, pin 8 for  
2.5V trim) to its appropriate +Output (pin 7 for 3.3V trim, pin 10 for 2.5V trim)  
will decrease the output voltage.  
5
6
+3.3V  
LOAD  
3.3V TRIM  
3.3V RETURN  
10  
+2.5V OUTPUT  
Figure 3A.Trim Connections Using a Trimpot  
+2.5V  
+2.5V  
TRIM  
DOWN  
8
9
7
1
4
A resistor connected from the Trim Pin (pin 5 for 3.3V trim, pin 8 for 2.5V trim)  
to the appropriate Return (pin 6 for 3.3V trim, pin 9 for 2.5V trim) will increase  
the output voltage.  
LOAD  
–INPUT  
+INPUT  
2.5V TRIM  
2.5V RETURN  
+3.3V OUTPUT  
+3.3V  
LOAD  
+3.3V  
TRIM  
DOWN  
5
6
3.3V TRIM  
3.3V RETURN  
Figure 3C. Decrease Output Voltage Trim Connections Using a Fixed Resistor  
This product is subject to the following operating requirements  
and the Life and Safety Critical Application Sales Policy:  
Refer to: http://www.murata-ps.com/requirements/  
Murata Power Solutions, Inc.  
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.  
ISO 9001 and 14001 REGISTERED  
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other  
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply  
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without  
notice.  
© 2012 Murata Power Solutions, Inc.  
www.murata-ps.com/support  
MDC_BCP Models.B05 Page 7 of 7  

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