MPDRX312S DATA Sheet
1
DC-DC Converter DATA Sheet
MPDRX312S
1. Features
･Ultra high-speed response is realized by using
original ripple detecting control.
･Up to 16A output current, non-isolated POL.
･Wide adjustable output voltage range by connecting
external resistance (0.8V to 1.8V).
･Wide operating temperature（-40 oC to +85 oC）.
･UVLO function, ON/OFF function, Output voltage sense function,
Over-current function and, PowerGood signal output function
are built in.
2. Appearance, Dimensions
15.4±0.2
11
P
P
P
P
P
□□□
①②③
P
12
27.8±0.2
P
P
P
P
P
P
P
P
P
P
SZ
P
M
)…reference value
P=2.54 ±0.2mm
P
P
P
(
Tolerance is not accumulated.
1
22
4.2max.
Marking
(1)
Pin No.1 Marking / MFG ID
(2)
Parts No.
SZ
(3)
Lot No.
□□□
①②③
①Production factory Mark
②Production Year
③Production Month（1,2,3,…9,O,N,D）
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
2
Pin Number and Function
Pin No.
Symbol
2
SENSE
3,4,5
Vout
6,7,8,9,
GND
16,17,18
10
FT
11
VAR
12,13,14,15
Vin
1
OVPOUT
19
SS
20
N.C.
21
PWRGOOD
22
ON/OFF
Function
Output voltage sense
Output
GND
Output trim
Output voltage adjustment
Input
Output Over-voltage Alarm
Soft start
Non connection
Power Good
Remote ON/OFF
3. Block Diagram
Vout
Vin
12,13,14,15
3,4,5
SENSE
2
16,17,18
ON/OFF
22
21
PG.
20
19
N.C.
1
GND
GND
VAR
Control Unit
FT
6,7,8,9
11
10
SS
OVPOUT
4. Environmenral Conditions
4.1. Operating Temperature Range
4.2. Storage Temperature Range
4.3. Operating Humidity Range
4.4. Storage Humidity Range
-40°C ~ +85°C
-40°C ~ +85°C
20% ~ 85% （No water condenses in any cases.）
10% ~ 90% （No water condenses in any cases.）
5. Absolute Maximun Rating
Item
Minimum Input Voltage
SENSE, VAR, FT, ON/OFF, SS
PWRGOOD Pin Voltage
Maximum POW-GOOD Sink Current
Unit
V
Absolute Rating
0
V
Vin
mA
1
Remarks
No voltage, no matter how instantaneous, shall be applied beyond the absolute maximum voltage rating to this product. If you
apply any voltage over this limit the product characteristics will deteriorate or the product itself will be destroyed. Even though it
may continue operating for a while after the over-voltage event, its life will likely be shortened significantly. Reliability and life of the
module may degrade similarly if the maximum operating voltage rating is continuously exceeded. This product is designed to
operate within the maximum operating voltage rating specification.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
3
6. Characteristics
6.1. Electrical Characteristics (Ta=25 oC)
Value
Item
Condition
Symbol
Unit
Min.
Typ.
Max.
3.0
-
5.5
V
Input Voltage Range
Vin
Rising UVLO Threshold
UVLOr
Vin Increasing
-
2.5
-
V
Falling UVLO Threshold
UVLOf
Vin Decreasing
-
2.4
-
V
Output Voltage
Adjustable Range
FT=Open
0.8
-
0.9
Vout
FT=Short
0.9
-
1.8
-3.0
-
+3.0
-2.5
-
+2.5
Output Voltage Tolerance
Vo tol
Over Vin, Io,
Temperature Range
Rset=1% tolerance
V
Vout=0.8～0.9V
FT=Open
Vout=0.9～1.8V
FT=Short
%Vo
Output Current
Iout
See the thermal derating curve
in section 6.2.
0
-
16
A
Ripple Voltage
Vrpl
Vin =3.3V, Iout=0～16A
BW=20MHz, Cout=100µF
-
-
100
mV(pp)
Vout=0.8V
-
73.5
-
Vout=1.2V
-
79
-
Vout=1.8V
-
86.5
-
Vin =3.3V, Vout=1.8V
-
650
-
Vin =3.3V, Vout=0.8V
-
500
-
PWGL
Power Good low threshold
-
0.87Vo
-
PWGH
Power Good high threshold
-
1.13Vo
-
Efficiency
Operating Frequency
Power Good
EFF
Vin =3.3V, Iout=16A
Frq
%
kHz
ON/OFF pin is pulled up to Vin inside of the DC-DC converter. If ON/OFF pin is left
open, the DC-DC converter shall be “ON”. This pin will be pulled down to GND
inside the DC-DC converter when UVLO events occur. Please do NOT connect
this pin to power supply with low impedance line, so as not to damage the
converter.
If ON/OFF pin is connected to
GND, the DC-DC Converter
OFF
0
0.3
V
shall be “OFF”.
If output is shorted to GND, DC-DC
converter will shut down. After reject the
32
A
abnormal mode , DC-DC converter will
restart by re-inputting Vin or toggling
ON/OFF pin.
ON/OFF pin High Voltage
VIH
ON/OFF pin Low Voltage
VIL
Short Circuit Protection
SCP
Over Temperature
Protection
OTP
Reset, Followed by Auto-Recovery
-
180
-
External Output Capacitor
Cout
When input voltage is ideal voltage
source
100
-
1000
µF
Rising Overshoot
Vover
-
0
+10
%
Startup Delay
Td
ON/OFF High:Vin Low→High Vo=10%
SS= Open
0.1
0.5
2
msec
RC Startup Delay
Trcd
Vin High : ON/OFF Low → High/Open
Vo=10%
0.1
0.4
2
msec
o
C
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
4
6.2. Thermal Derating
温度ディレーティング曲線
Thermal
Derating Curve
20
Iout[A］
16
2.0m/s
1.5m/s
1.0m/s
0.5m/s
0m/s
12
8
4
0
20
30
40
50
60
70
80 85
Ta[℃]
The above derating limits apply to this product soldered directly to 101.6*180mm*1.6mm PCB. Any adjacent parts of
high temperature may cause overheating. For reliable operation, please ensure that the FET temperature of this
product is maintained below 120°C and the inductor temperature is below 106°C.
Coil Measurement Point
MOSFET Measurement
Point
M
Monitoring Point
of Over Temperature Protect
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
5
7. Operation information
7.1. Adjusting the Output Voltage
The output voltage can be adjusted by connecting resistors between VAR-pin(11Pin) to GND-pin. The following
equation gives the required external-resistor values to adjust the output voltage to Vo-adj.
It is highly recommended that evaluation of the characteristics of this DC-DC converter’s operation under your
board conditions be thoroughly conducted.
Internal Circuit
MPDRX312S
(a)0.8≦ Vout ＜0.9V
Vout
RVAR＝
6.8 kΩ
VAR pin
－1800
[Ω]
Vo-adj[V]－0.8[V]
(b)0.9≦ Vout ≦1.8V
1.8 kΩ
RVAR＝
(FT-pin：SHORT to GND)
5440
－1800
Vo-adj[V]－0.9[V]
Error amp
RVAR
(FT-pin：OPEN)
5440
FT pin
Vo-adj
[V]
1.8
1.5
1.2
1.0
0.9
0.8
Calculated
RVAR[Ω]
4240
7270
16330
52600
∞
∞
RVAR Example
FT pin
3.9ｋ＋330
6.8ｋ＋470
16ｋ＋330
47ｋ＋5.6k
Open
Open
Short to GND
Short to GND
Short to GND
Short to GND
Short to GND
Open
7.2. ON/OFF Control
ON/OFF function
Using the ON/OFF feature, the operation of this product can be disabled without removal of the input voltage.
Sequencing of a power supply system and power-saving control can be easily achieved using this function.
ON/OFF Control Operation
When ON/OFF-pin(22pin) is left open
When ON/OFF-pin(22pin) is connected to GND
……
……
MPDRX312S
example
GND
ON/OFF
or
Output Voltage =ON
Output Voltage=OFF
< Caution>
ON/OFF pin is pulled up inside of the DC-DC
converter, so voltage appears up to 7V at ON/OFF
pin.
ON/OFF pin will be pulled down to GND inside the
DC-DC converter when UVLO events occur.
Please do NOT connect this pin to power supply, so
as not to damage the converter.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
[Ω]
MPDRX312S DATA Sheet
6
7.3. Output voltage sensing
By connecting the SENSE-pin to the load, the output voltage drop due to the PCB wiring may be compensated for
(within 10cm).
Vout
MPDRX312S
SENSE
Load
GND
Please do NOT connect SENSE-pin to the output of LC filter that is set to the Vout line.
When using this way, this product will not operate properly.
Vout
MPDRX312S
SENSE
Load
GND
< Caution>
Please connect SENSE-pin to Vout-pin nearby the product, if sense function is not used.
7.4. Soft start function
By using the soft start function, ramp-rate of the output-starting is adjustable. Adjustment range of ramp-rate is
from 2 to 10ms. Ramp rate is adjusted by external capacitor between SS-pin(19pin) and GND.
MPDRX312S
The equation of starting time about output voltage
-8
Starting time:Td＝
（Css+1.2×10 ）×0.8
5×10
-6
-4
+2×10 [s]
Css
Css：The capacitance of external capacitor.(F)
GND
7.5. OVPOUT pin
If the output voltage exceeds 20% of the point voltage, the OVPOUT pin sets out the alarm signal (High=5V).
For example, in case the drain and source of high-side FET is shorted, the alarm signal appears. There is no set
delay time of the alarm signal.
Please leave the OVPOUT pin open, when this alarm signal function is not used.
Circuit configuration is shown as follow,
CMOS
inverter
output
CMOS
ｲﾝﾊﾞｰﾀ出力
VREG
200k
SGND
OUPOUT
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
7
7.6. Power Good
Powergood signal is appeared within the value of clause 6.1. (Open-drain output).
Output voltage is within voltage detection threshold : POW-GOOD is open.
Output Voltage is out of voltage detection threshold : POW-GOOD is connected to GND.
7.7. Input External capacitor
It is recommended to connect a low-impedance electrolytic capacitor of 100μF or more at Vin terminal.
Smaller input capacitor may leads to an unstable operation of this product caused by input voltage
fluctuation. Please check the proper operation of it on your product when smaller input capacitor is used.
Using ceramic capacitors as input capacitor may cause an increase of output voltage, because input ripple
current flows through the external input capacitor and wiring resistance.
This phenomenon is affected by the position of external capacitors, the value of external capacitors and
voltage difference between Vin and Vout. Using low-impedance electrolytic capacitor will ease this problem.
Please check the proper operation of it on your product when ceramic input capacitor is used.
MPDRX312S
Vin
Cin
Ripple current
Vout
Rw×Irpl appears as additional
output ripple voltage.
Rw
Wiring resistance
7.8. Output External capacitor
Ceramic capacitors are recommended as output external capacitor.
Using ceramic capacitors, small output variation and small ripple voltage are realized.
Output capacitor should be within 100μF to 1000μF. Output capacitor shall be placed near the
output terminal. When using plural capacitors, please make sure to place a capacitor of at least
100μF near the output terminal, and place other capacitors near the load.
When using LC output filter, please make sure to place a capacitor of at least 100μF near the output
terminal.
7.9. Parallel Operation
This product is incapable of parallel operation.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
8
8. Reliability
8.1. Humidity
According to JIS-C-0022.
40 土 2°C, 90 to 95%RH, 100 hours. Leave for 4 hours at room temperature.
No damage in appearance and no deviation from electrical characteristics (section 6.1.).
8.2. Temperature Cycles
Repeat cycle 5 times. Leave 2 hours at room temp.
No damage in appearance and no deviation from electrical characteristics (section 6.1.).
Step
Condition
Time
1
-40°C±3°C
30 minutes
2
Room Temp.
5-10 minutes
3
+85°C±2°C
30 minutes
4
Room Temp.
5-10 minutes
8.3. Vibration
10 to 55Hz, 1.5mm amplitude (1minute cycle), 1 hour for each of X, Y, Z directions.
No damage in appearance and no deviation from electrical characteristics (section 6.1.).
8.4. Mechanical Shock
20G, 1 time for each X, Y, Z directions.
No damage in appearance and no deviation from electrical characteristics (section 6.1.).
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
9
9. Test Circuit
In the following test circuit, the initial values under item 6.1. should be met.
9.1. General Measure Circuit
SENSE
12,13,14,15
Vout
Vin
C1
2
3,4,5
16,17,18
GND
GND
RL
C2
MPDRX312S
6,7,8,9
RVAR
1 OVPOUT
VAR
19 SS
FT
20 N.C.
11
10
21 PWRGD
22 ON/OFF
C1：100F／6.3V
C2：100F／6.3V
Ceramic Capacitor
Ceramic Capacitor
Please make sure to place C1 and C2 nearby input and output terminal of DC-DC converter.
9.2. Ripple Noise Measurement Circuit
Coaxial cable :1.5D-2V, L=1.5m
Oscilloscope
BW：20MHz
Vout
DC-DC Converter
GND
Terminator
（Keisokugiken TRC-50F)
Ceramic Capacitor
Equivalent circuit
R：50
C：0.01F
A: Ripple Noise Voltage
B: Ripple Voltage
B
A
C: Switching Period
C
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
10
10. Mounting Condition
10.1. PCB Land Pattern Recommendation
2.8
1.0
1.2
2.54
4.3
1.5
9.0
5.0
unit
[mm]
10.2. Recommended Soldering Conditions
Reflow Soldering
This product is RoHS compliant. The following profile is recommended for the reflow of this
product using Pb-free solder paste (Sn-Ag-Cu).
Method
: Full convection reflow soldering
Reflow Soldering Profile
JEDEC IPC/JEDEC J-STD-020D
Table 5-2 Classification Reflow Profile
Pb-Free Assembly Large Body
Profile details
Soldering temperature
Soldering time
Heating time
Preheating time
Programming rate
Descending rate
Total soldering time
Times
:
:
:
:
:
:
:
:
245ºC+0/-5ºC
30 seconds, 240 to 245ºC
60 to 150 seconds, over217ºC
60 to 120 seconds,150 to 200ºC
3ºC/ sec. Max., 217 to 245ºC
6ºC/ sec. Max.
8 minutes Max., 25 to 245ºC
1 time
245oC
Parts surface temperature [ºC]
217 oC
200 oC
60～150
(seconds)
150oC
60～120 (seconds)
Times
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
11
※Do not vibrate for the products on reflow.
Please need to take care temperature control because mounted parts may come off if the product are left
under the high temperature.
Do not reflow DC-DC converter as follows, because DC-DC converter may fall down from a substrate
during reflowing.
Substrate
DC-DC Converter
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
12
11. Packaging Specification
24.0±0.1
4.0±0.1
(29.4)
20.2±0.1
2.0±0.15
(4.6)
0.4±0.05
44.0±0.3
+0.1
-0
40.4±0.1
1.5
1.75±0.1
11.1. Emboss Tape Dimensions
(16)
Pulling direction
+0.1
-0
+0.1
-0
1.7
0.2
1.5
11.2. Real Dimension
49.4±1.0
45.4±1.0
φ100±1
φ330±2
A
2.0±0.5
表示
Indication
φ21.0±0.8
φ13.0±0.5
A部詳細図
Portion A
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
13
11.3. Taping Specification
未実装部
Epmty portion
(200mm MIN)
未実装部
Epmty portion
(200mm MIN)
リーダー部
Leader portion
(200mm MIN)
部品収納部
"Module on tape" portion
表示
Indication
1pin
引き出し方向
Pulling direction
モジュールは部品面を上側、基板面を下側に配置します。
The module is located such as parts in upper side and PCB in lower side.
11.4. Note
1. The adhesive strength of the protective tape must be within 0.1-1N.
2. Each reel contains 300pcs.
3. The deficiency per reel is 0 piece.
4. The reel shows customer part number, Murata part number and quantity.
5. The color of reel is not designated.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
14
12. Typical Characteristics Data
12.1. Load Transient Response
Our original ripple-detective control method achieves much better load transient responses.
Vin=5.0V, Vo=1.8V(Fig.11-1a) , 0.8V(Fig.11-1b)
Io=8A ->16A, di/dt=1A/us, Cout=100uF(Ceramic), Ta=25 oC
50mV/div
Vout
50mV/div
Vout
Iout
Iout
100us/di
v
100us/di
v
Fig.12-1a. Load Transient Response (Vout:1.8V)
Fig.12-1b.Load Transient Response (Vout:0.8V)
12.2. Output Impedance characteristics
Our original ripple-detective control method achieves very low output impedance in wide
frequency range.
MPDRX312S
RX301S/302S Output Impedance
Conventional PMW Product's Output
Impedance
100
40
80
30
Zo [mohm]
Zo[mOhm]
50
20
10
60
40
20
0
0.1
1
10
100
Frquency[kHz]
Fig.12-2-1. Output Impedance of MPDRX312S
0
0.01
0.1
1
10
100
Frequency [kHz]
Fig.12-2-2. Output Impedance of conventional product
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
15
12.3. Other electrical characteristics
12.3.1. Vout=1.8V
（Ta=25 oC, Cin= GRM32EB30J107ME16, Cout= GRM32EB30J107ME16, RVAR=4240Ω）
Efficiency
1.85
95
1.84
90
1.82
85
Eff [%]
Vo1 [V]
Load Regulation
1.80
80
1.78
75
1.76
70
1.75
0
2
4
6
8
10
12
14
16
Io [A]
Vin=3V
Vin=5V
Vin=3.3V
Vin=5.5V
Vin=4.5V
Fig.12-3-1. Output Voltage v.s. Output Current
0
2
4
6
8
10
12
14
16
Io [A]
Ta=25℃ Vin=3V
Ta=25℃ Vin=4.5V
Ta=25℃ Vin=5.5V
Ta=25℃ Vin=3.3V
Ta=25℃ Vin=5V
Fig.12-3-2. Efficiency v.s. Output Current
Output ripple voltage
50
Vr1(full) [mVp-p]
40
30
20
10
0
0
2
4
6
8
10
12
14
16
Io [A]
Vin=3V
Vin=5V
Vin=3.3V
Vin=5.5V
Vin=4.5V
Fig.12-3-3. Ripple Voltage v. s. Output Current
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
16
12.3.2. Vout=1.2V
（Ta=25 oC, GRM32EB30J107ME16, Cout= GRM32EB30J107ME16, RVAR=16330Ω）
Efficiency
Load Regulation
95
1.22
90
1.21
85
Eff [%]
Vo1 [V]
1.24
1.20
80
1.19
75
1.18
70
1.16
0
2
4
6
8
10
12
14
16
Io [A]
Vin=3V
Vin=5V
Vin=3.3V
Vin=5.5V
0
2
4
6
8
Ta=25℃ Vin=3V
Ta=25℃ Vin=4.5V
Ta=25℃ Vin=5.5V
Vin=4.5V
Fig.12-3-4. Output Voltage v.s. Output Current
10
12
14
16
Io [A]
Ta=25℃ Vin=3.3V
Ta=25℃ Vin=5V
Fig.12-3-5. Efficiency v.s. Output Current
Output ripple voltage
50
Vr1(full) [mVp-p]
40
30
20
10
0
0
2
4
6
8
10
12
14
16
Io [A]
Vin=3V
Vin=5V
Vin=3.3V
Vin=5.5V
Vin=4.5V
Fig.12-3-6. Ripple Voltage v.s. Output Current
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
17
12.3.3. Vout=0.8V
（Ta=25 oC, GRM32EB30J107ME16, Cout= GRM32EB30J107ME16, RVAR=OPEN）
Efficiency
Load Regulation
0.82
95
0.82
90
Eff [%]
Vo1 [V]
0.81
0.80
85
80
0.79
75
0.78
70
0.78
0
0
2
4
6
8
10
12
14
16
Vin= 3.3V
Vin= 5.5V
4
6
8
10
12
14
16
Io [A]
Io [A]
Vin= 3V
Vin= 5V
2
Vin= 4.5V
Fig.12-3-7. Output Voltage v.s. Output Current
Ta=25℃ Vin=3V
Ta=25℃ Vin=4.5V
Ta=25℃ Vin=5.5V
Ta=25℃ Vin=3.3V
Ta=25℃ Vin=5V
Fig.12-3-8. Efficiency v.s. Output Current
Output ripple voltage
50
Vr1(full) [mVp-p]
40
30
20
10
0
0
2
4
6
8
10
12
14
16
Io [A]
Vin =3 V
Vin =5 V
Vin= 3 .3 V
Vin= 5 .5 V
Vin = 4 .5 V
Fig.12-3-9. Ripple Voltage v.s. Output Current
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
18
13. Notice
13.1. Please do not use a connector or a socket for connection with your board of this product.
Electrical performance may be deteriorated the influence of contact resistance.
Please be sure to mount this product with solder.
13.2. Be sure to provide an appropriate fail-safe function on your product to prevent a second damage that
may be caused by the abnormal function or the failure of our product.
13.3. Input / Output capacitor
When a inductance or a switch devise are connected to the input line, or when you use a power supply with
output inductance as the input voltage source, the input voltage of the DC-DC converter will be fluctuated.
By this input voltage fluctuation, the transient load response of the DC-DC converter may be deteriorated or
abnormal oscillation may occur. So please confirm normal operation on each application.
Please use external input capacitor in order to decrease inductance of input line.
13. 4. Wiring of input / output capacitor
In the case of input / output capacitor connection, in order to reduce electrical noise, please design PCBs
with consideration of the following item.
①.Please be sure to check normal operation on your system.
②.Please use low impedance capacitors with good high frequency characteristic.
③.Please shorten those leads of each capacitor as much as possible, and make sure the lead
Inductance low.
④.Both input-side and output side, please make the wiring loop between plus and minus as small as
possible.The influence of leakage inductance can be reduced.
⑤.Please design the print pattern of the main circuit as wide and short as possible.
Make wiring roop small
Make wiring roop small
+Vin
+Vin
+Vout
+Vout
DC-DC
Converter
+Vin
Load
-Vin
GND
C1
C2
shorten the leads and pattern
shorten the leads and pattern
13.5. This product should not be operated in parallel or in series.
13.6. Inrush current protection is not a feature of this product.
Please be careful that surge voltage caused by wiring indcutance etc. may make the product damage when input
voltage is applied suddenly to the product.
13.7. Please connect the input terminal with proper polarity. If you connect wrong polarity, the DC-DC
Converter may be broken. In the case of the DC-DC Converter is damaged, abnormal input current may
flow in, and abnormal overheat of the DC-DC Converter, or some damage of your products may occur.
Please use a diode and a fuse to as following figure.
fuse
+
+
+
diode
IN
-
OUT
Load
-
※Please select diode and fuse after confirming the operation.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
19
13.8. Cleaning
Please use no-cleaning type flux and do not wash this product.
13.9. Storage
13.9.1. Please store the products in room where the temperature/humidity is stable and direct sunlight cannot come
in, and use the products within 6 months after delivery.
Please avoid damp and heat or such places where the temperature greatly changes, as water may condense
on this product, and the quality of characteristics may be reduced, and/or be the solderability may be
degraded.
If this product needs to be stored for a long time (more than 1 year), this product may be degraded in
solderability and/or corroded. Please test the solderability of this product regularly.
Baking before reflow process is unnecessary to store the products under 30℃,60%RH or less up to 6
months.
In case the storage condition is over above mentioned, if these are unpacked condition, please bake them at
125℃±5℃/24hour. If these are packed in a tape, please bake them before soldering at 60℃±5℃/168hour.
13.9.2. Please do not store this product in places such as :
A dusty place, a place exposed directly to sea breeze, or in an atmosphere containing corrosive gas
(Cl2,NH3,SO2,NOX and so on).
13.10. Operational Environment and Operational Conditions
13.10.1. Operational Environment
The products are not waterproof, chemical-proof or rust-proof.
In order to prevent leakage of electricity and abnormal temperature increase of the products, do not use the
products under the following circumstances:
(1) in an atmosphere containing corrosive gas (Cl2, NH3, SO2, NOX and so on).
(2) in a dusty place.
(3) in a place exposed to direct sunlight.
(4) in such a place where water splashes or in such a humid place where water condenses.
(5) in a place exposed to sea breeze.
(6) in any other places similar to the above (1)through (5).
13.10.2. Operational Conditions
Please use the products within specified values (power supply, temperature, input, output and load
condition, and so on). Input voltage drop for line impedance, so please make sure that input voltage is
included in specified values.
If you use the products over the specified values, it may break the products, reduce the quality, and even if
the products can endure the condition for short time, it may cause degradation of the reliability.
Also please take care that the external voltage over output voltage of DC-DC Converter does not applies to
output of this DC-DC Converter.
13.10.3. Note prior to use
If you apply high static electricity, over rated voltage or reverse voltage to the products, it may cause defects
in the products or degrade the reliability.
Please avoid the following items:
(1) over rating power supply, reverse power supply or not-enough connection of 0 V(DC) line.
(2) electrostatic discharge by production line and/or operator.
(3) electrified product by electrostatic induction.
Do not give an excessive mechanical shock.
If you drop the products on the floor, etc., it may occur a crack to the core of inductors and monolithic
ceramic capacitors.
Do not give a strong shock such as a drop in handling.
13.11. Transportation
If you transport the products, please pack them so that the package will not be damaged by mechanical
vibration or mechanical shock, and please educate and guide a carrier to prevent rough handling.
If you transport the products to overseas (in particular, by sea), it is expected that the transportation
environment will be the worst, so please pack the products, in the package designed on the consideration of
mechanical strength, vibration-resistant and humidity-resistant. The package of the products which Murata sells
in Japan, may not resist over seas transport.
Please consult us if you are to use the Murata package of the products sold in Japan for transport to overseas.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
MPDRX312S DATA Sheet
20
!
Note
1. Murata recommends that customers ensure that the evaluation and testing of these devices are completed
with this product actually assembled on their product.
2. Please contact our main sales office or nearby sales office before using our products for the applications
listed below which require especially high reliability for the prevention of defects which might directly
cause damage to the third party’s life, body or property or this products for any other applications that
described in the above.
①Aircraft equipment
②Aerospace equipment
③Undersea equipment
④Power plant control equipment
⑤Medical equipment
⑥Transportation equipment (vehicles, trains, ships, etc.)
⑦Traffic signal equipment
⑧Disaster prevention /crime prevention equipment
⑨Data-processing equipment
⑩Application of similar complexity and/or reliability requirements to the applications listed in the above.
3. If you have any concerned materials other than RoHS directive, please contact us.
4. About the written contents, since changing without a preliminary announcement for improvement and
supply are sometimes stopped, please confirm in case of ordering.
If written contents are unknown, please ask to our main sales office or nearby sales office.
Note:
1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our
products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
2016.11.21
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