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MPDRX303S,304S Application
1
DC-DC Converter Application Manual
MPDRX303S,MPDRX304S
1. Features
・Ultra high-speed response is realized by using original ripple detecting control.
・Up to 26A output current, non-isolated POL.
・Wide adjustable output voltage range
by connecting external resistance (0.8V to 3.63V).
・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
26.8±0.2
20
(
)…reference value
P=2.54 ±0.2mm
P
Tolerance is not accumulated.
P
P
11
④
10
P
③
P
26.8±0.2
P
P
PT□
②
P
P
①
P
P
P
P
P
P
P
P
P
M
1
7.0max.
Marking
(1)
Pin No.1 Marking / MFG ID
(2)
Parts No.
PT□
①
①
E:MPDRX303S
D:MPDRX304S
(3)
Lot No.
□□□
②③④
②Production factory Mark
③Production Year
④Production 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.
2009.8.20
MPDRX303S,304S Application
2
Pin Number and Function
Pin No.
Symbol
1
SENSE
2,3,4
Vout
5,6,7,8,13,14,15
GND
9,
FT
10,
VAR
11,12
Vin
17,
SS
18
N.C.
19
POW-GOOD1
20
POW-GOOD2
16
ON/OFF
Function
Output voltage sense
Output
GND
Output trim
Output voltage adjustment
Input
Soft start
This pin must be left open.
Power Good
Power Good
Remote ON/OFF
3. Block Diagram
11,12
Vin
Vout
2,3,4
SENSE
1
GND
13,14,15
5,6,7,8
GND
16
17
18
VAR
ON/OFF
SS
Control unit
N.C.
10
FT
9
19
POW-GOOD1
20
POW-GOOD2
4. Test Circuit
11,12 Vin
C1,C2
16
17
18
19
20
ON/OFF
MPDRX30*S
S
S
NC
PG1
5,6,7,8,
PG2
GND 13,14,15
Open= ON
Short= OFF
SENSE 1
Vout 2,3,4
VAR 10
FT 9
RVAR
RL
C3,C4
Short: Vo ≧0.95 V
Open: Vo <0.95 V
(Ceramic Capacitor)
C1,C2:22µF/25V×2
C3,C4:100µF/6.3V×2
(Ceramic Capacitor)
Please make sure to place C1, C2,C3 amd C4 nearby input and output terminal of 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.
2009.8.20
MPDRX303S,304S Application
3
5. Characteristics
5. 1 Electrical Characteristics (Ta=25 oC)
(1) MPDRX303S
Value
Item
Condition
Symbol
Unit
Min.
Typ.
Max.
6.2
9.6
13.2
V
Input Voltage Range
Vin
Rising UVLO Threshold
UVLOr
Vin Increasing
-
5.25
-
V
Falling UVLO Threshold
UVLOf
Vin Decreasing
-
5.0
-
V
Output Voltage
Adjustable Range
Vout
1.6
-
3.63
V
Output Voltage Tolerance
Vo tol
-2.0
-
+2.0
%Vo
Output Current
Iout
0
-
26
A
Ripple Voltage
Vrpl
-
20
100
mV(pp)
Vout=3.3V
-
91
-
Vout=2.5V
-
88
-
Vout=1.8V
-
86
-
Vin =9.6V, Vout=3.3V
-
600
-
Vin =9.6V, Vout=1.8V
-
350
-
PWGL
Power Good low threshold
-
0.87Vo
-
PWGH
Power Good high threshold
-
1.13Vo
-
Efficiency
Operating Frequency
Power Good
EFF
FT=Short
Over Vin, Io, Temperature Range
Vin=6.2∼13.2V
Rset=1% tolerance, FT=Short
See the thermal derating curve
in section 5.2.
Vout =3.3V, Iout=0∼26A
BW=20MHz, Cout=200µF
Vin =9.6V, Iout=26A
Frq
%
kHz
V
ON/OFF pin High Voltage
VIH
ON/OFF pin Low Voltage
VIL
Short Circuit Protection
SCP
External Input Capacitor
Cin
External Output Capacitor
Cout
Ramp Rate
Tr
Rising Overshoot
Vover
Startup Delay
Td
RC Startup Delay
Trcd
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
1.0
V
shall be “OFF”.
If output is shorted to GND, DC-DC
converter will shut down. After reject the
26
46
A
abnormal mode , DC-DC converter will
restart by re-inputting Vin or toggling
ON/OFFpin.
When input voltage is ideal voltage
40
5000
µF
source
When input voltage is ideal voltage
source
Vo=10%∼90%, SS=Open
ON/OFF High : Vin Low→ High
Vo=10%
SS= Open
Vin High : ON/OFF Low → High/Open
Vo=10%
200
-
2000
µF
1
2
5
msec
-
0
+10
%
0.1
0.5
2
msec
0.1
0.4
2
msec
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.
2009.8.20
MPDRX303S,304S Application
4
(2) MPDRX304S
Value
Item
Condition
Symbol
Unit
Min.
Typ.
Max.
6.2
9.6
13.2
V
Input Voltage Range
Vin
Rising UVLO Threshold
UVLOr
Vin Increasing
-
5.25
-
V
Falling UVLO Threshold
UVLOf
Vin Decreasing
-
5.0
-
V
Output Voltage
Adjustable Range
FT=Open
0.8
-
0.95
Vout
FT=Short
0.95
-
1.65
Output Voltage Tolerance
Vo tol
-2.5
-
+2.5
%Vo
Output Current
Iout
0
-
26
A
Ripple Voltage
Vrpl
-
15
100
mV(pp)
Vout=1.5V
-
85
-
Vout=1.2V
-
83
-
Vout=0.8V
-
79
-
Vin =9.6V, Vout=1.5V
-
550
-
Vin =9.6V, Vout=0.8V
-
320
-
PWGL
Power Good low threshold
-
0.87Vo
-
PWGH
Power Good high threshold
-
1.13Vo
-
Efficiency
Operating Frequency
Power Good
EFF
V
Over Vin, Io, Temperature Range
Vin=6.2∼13.2V
Rset=1% tolerance
See the thermal derating curve
in section 5.2.
Vout =1.2V, Iout=0∼26A
BW=20MHz, Cout=200µF
Vin =9.6V, Iout=26A
Frq
%
kHz
V
ON/OFF pin High Voltage
VIH
ON/OFF pin Low Voltage
VIL
Short Circuit Protection
SCP
External Input Capacitor
Cin
External Output Capacitor
Cout
Ramp Rate
Tr
Rising Overshoot
Vover
Startup Delay
Td
ON/OFF Startup Delay
Trcd
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
1.0
V
shall be “OFF”.
If output is shorted to GND, DC-DC
converter will shut down. After reject the
abnormal mode , DC-DC converter will
26
46
A
restart by re-inputting Vin or toggling
ON/OFF pin.
When input voltage is ideal voltage
40
5000
µF
source
When input voltage is ideal voltage
source
200
-
2000
µF
1
2
5
msec
-
0
+10
%
ON/OFF High : Vin Low→ High
Vo=10%, SS= Open
0.1
0.5
2
msec
Vin High : ON/OFF Low → High/Open
Vo=10%
0.1
0.4
2
msec
Vo=10%∼90%, SS=Open
※This DC-DC converter thermally shuts down when temperature of a control IC reaches to 180 °C typically.
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.
2009.8.20
MPDRX303S,304S Application
5
5. 2 Thermal Derating
MPDRX304S
(Vin=6.2∼12V、Vout=0.8∼1.65V
Airflow:0∼3.0m/s)
28
26
24
26
24
22
20
18
16
14
12
10
8
6
4
2
0
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.2 m/s
0m/s
Iout[A]
Iou t[A ]
MPDRX3 03S
(Vin =6.2 ∼1 2V、Vout=1 .6∼3.6 3V、
Airflow:0∼3.0 m/s)
22
20
18
16
3.0m /s
2.0m /s
1.5m /s
1.0m /s
0.2m /s
14
12
10
0m /s
8
6
4
2
0
20
30
40
50
60
Ta[℃]
70
80
20
30
40
50
60
70
80
Ta [℃]
The above derating limits apply to this product soldered directly to 101.6*180mm*1.6mm PCB (6 layer). 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.
6. Pin Description
6.1. Adjusting the Output Voltage
The output voltage can be adjusted by connecting resistors between VAR-pin(10Pin) to GND-pin.
The following equation gives the required external-resistor value 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.
In case output voltage is used more than 0.95V, please connect FT-pin(9pin) to GND.
Internal Circuit
MPDRX303S
①MPDRX303S
Vout
MPDRX304S
VAR pin
303S:1.8 kΩ
304S:5.1kΩ
(FT-pin: SHORT to GND)
5440
RVAR=
②MPDRX304S
(a)0.8≦ Vout <0.95V
Error amp
FT pin
[Ω]
−1800
Vo-adj[V]×1.002−1.5[V]
6.8 kΩ
RVAR=
(FT-pin:OPEN)
5440
−5100
[Ω]
Vo-adj[V]×1.002−0.8[V]
(b)0.95≦ Vout ≦1.65V
RVAR=
(FT-pin:SHORT to GND)
5440
−5100
[Ω]
Vo-adj[V]×1.002−0.95[V]
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.
2009.8.20
MPDRX303S,304S Application
6
<RVAR calculation example>
MPDRX303S
Vo-adj
[V]
3.63
3.3
2.5
1.8
1.6
MPDRX304S
RVAR計算結果[Ω]
Calculated
RVAR[Ω]
745
1211
3613
16118
50913
FT pin
(8pin)
Vo-adj
[V]
1.65
1.5
1.2
1.0
0.95
0.9
0.8
Short to GND
Short to GND
Short to GND
Short to GND
Short to GND
RVAR計算結果[Ω]
Calculated RVAR[Ω]
FT pin
(8pin)
2635
4737
16453
99515
2858058
48338
3394900
Short to GND
Short to GND
Short to GND
Short to GND
Short to GND
Open
Open
6. 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(16pin) is left open
When ON/OFF-pin(16pin) is connected to GND
……
……
Output Voltage =ON
Output Voltage=OFF
MPDRX30*S
example
GND
ON/OFF
or
6. 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
MPDRX30*S
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
MPDRX30*S
SENSE
Load
GND
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.
2009.8.20
MPDRX303S,304S Application
7
6.4. Input External capacitor
It is recommended to connect a low-impedance electrolytic capacitor of 40µF 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.
MPDRX30*S
Vin
Cin
Ripple current
Vout
Rw×Irpl appears as additional
output ripple voltage.
Rw
Wiring resistance
6.5. 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 200µF to 2000µF. Output capacitor shall be placed near the
output terminal. When using plural capacitors, please make sure to place a capacitor of at least
200µF 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 200µF near the output
terminal.
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.
2009.8.20
MPDRX303S,304S Application
8
7. Typical Characteristics Data
7. 1 Load Transient Response
Our original ripple-detective control method achieves much better load transient responses.
Vin=9.6V, Vo=2.5V(MPDRX303S,Fig.7-1a) , 1.2V(MPDRX304S,Fig.7-1b)
Io=0A ->10A, di/dt=20A/us, Cout=200uF(Ceramic), Ta=25 oC
Vout
50mV/div
Vout
50mV/div
10us/div
10us/div
Iout
Iout
Fig.7-1a. Load Transient Response (MPDRX301S)
Fig.7-1b.Load Transient Response (MPDRX302S)
7. 2 Output Impedance characteristics
Our original ripple-detective control method achieves very low output impedance in wide
frequency range.
Conventional PMW Product's Output
Impedance
MPDRX303S/304S Output Impedance
100
40
80
Zo [mohm]
Zo[mOhm]
50
30
20
10
60
40
20
0
0.1
1
10
100
Frquency[kHz]
Fig.7-2-1. Output Impedance of MPDRX303S/304S
0
0.01
0.1
1
10
100
Frequency [kHz]
Fig.7-2-2. 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.
2009.8.20
MPDRX303S,304S Application
9
7. 3 Other electrical characteristics
7. 3. 1 Vout=3.3V (MPDRX303S)
(Ta=25°C, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, Rtrim=1211Ω)
Efficiency
3.399
95
3.366
92
E fficien cy( % )
Vout (V)
Load Reguration
3.333
3.300
3.267
89
86
83
3.234
3.201
80
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Iout(A)
Vin:14V
Fig.7-3-1. Output Voltage v.s. Output Current
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-2. Efficiency v.s. Output Current
Ripple noise voltage
R ipple nois e v olta g e (m V p-p)
25
20
15
10
5
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-3. 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.
2009.8.20
MPDRX303S,304S Application
10
7. 3. 2 Vout=2.5V (MPDRX303S)
(Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=3613Ω)
Load Reguration
Efficiency
95
2.550
92
E fficien cy( % )
2.575
V o u t( V )
2.525
2.500
2.475
89
86
83
2.450
2.425
80
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Iout(A)
Vin:14V
Fig.7-3-4. Output Voltage v.s. Output Current
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-5. Efficiency v.s. Output Current
Ripple noise voltage
R ipple nois e v olta g e (m V p-p)
25
20
15
10
5
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-6. 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.
2009.8.20
MPDRX303S,304S Application
11
7. 3. 3 Vout=1.8V (MPDRX303S)
(Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=16118Ω)
Load Reguration
Efficiency
95
1.836
92
E fficien cy( % )
1.854
V o u t( V )
1.818
1.800
1.782
89
86
83
1.764
1.746
80
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Iout(A)
Vin:14V
Fig.7-3-7. Output Voltage v.s. Output Current
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-8. Efficiency v.s. Output Current
Ripple noise voltage
R ipple nois e v olta g e (m V p-p)
25
20
15
10
5
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-9. 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.
2009.8.20
MPDRX303S,304S Application
12
7. 3. 4 Vout=1.5V (MPDRX304S)
(Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=4737Ω)
Efficiency
Load Reguration
90
1.530
87
E fficien cy( % )
1.545
V o u t( V )
1.515
1.500
1.485
84
81
78
1.470
1.455
75
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Iout(A)
Vin:14V
Fig.7-3-10. Output Voltage v.s. Output Current
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-11. Efficiency v.s. Output Current
Ripple noise voltage
R ipple nois e v olta g e (m V p-p)
25
20
15
10
5
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-12. 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.
2009.8.20
MPDRX303S,304S Application
13
7. 3. 5 Vout=1.2V (MPDRX304S)
(Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=16453Ω)
Efficiency
Load Reguration
90
1.224
87
E fficien cy( % )
1.236
V o u t( V )
1.212
1.200
1.188
84
81
1.176
78
1.164
75
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Iout(A)
Vin:14V
Fig.7-3-13. Output Voltage v.s. Output Current
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-14. Efficiency v.s. Output Current
Ripple noise voltage
R ipple nois e v olta g e (m V p-p)
25
20
15
10
5
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-15. 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.
2009.8.20
MPDRX303S,304S Application
14
7. 3. 6 Vout=0.8V (MPDRX304S)
(Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=3394900Ω)
Load Reguration
Efficiency
90
0.816
87
E fficien cy( % )
0.824
V o u t( V )
0.808
0.800
0.792
84
81
0.784
78
0.776
75
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Iout(A)
Vin:14V
Fig.7-3-16. Output Voltage v.s. Output Current
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-17. Efficiency v.s. Output Current
Ripple noise voltage
R ipple nois e v olta g e (m V p-p)
25
20
15
10
5
0
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28
Iout(A)
Vin:5.6V
Vin:9.6V
Vin:14V
Fig.7-3-18. 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.
2009.8.20
MPDRX303S,304S Application
15
8. Mounting Condition
8. 1 PCB Land Pattern Recommendation
1pin
13.3
7.0
4.2
1.8
1.0
1.97
2.54
1.5
8. 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
※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
Note:
DC-DC Converter
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.
2009.8.20
MPDRX303S,304S Application
16
9. Notice
Input / Output capacitor
① Both input-side and output side, please make the wiring loop between plus and minus as small as possible.
The influence of a leakage inductance can be reduced.
② Please make the power line pattern as wide and short as possible.
This product should not be operated in parallel or in series.
Please do not use a connector or a socket to connect this product to your product.
The electric characteristics may be deteriorated by the influence of contact resistance.
Be sure to provide an appropriate fail-safe function on your product to prevent secondary damage
that may be caused due to abnormal functional or failure of this product.
Inrush current protection is not a feature of this product.
Please connect the input terminals with the correct polarity. If an error in polarity connection is made this
product may be damaged. If this product is damaged internally, an elevated input current may flow, and so
this product may exhibit an abnormal temperature rise, or your product may be damaged.
Please add a diode and fuse per the following diagram to protect them.
fuse
+
+
+
diode
IN
-
OUT
Load
-
※Please select diode and fuse after confirming the operation of your product.
Note
1. 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.
2. This catalog is indicated in August 2009. 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.
3. Types and specification in this catalog are referenced for your information only. Please confirm detailed
specifications by approving our individual drawing and specification sheet.
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.
2009.8.20
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