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MPDRX307S,308S Application
1
DC-DC Converter Application Manual
MPDRX307S,MPDRX308S
1. Features
・Ultra high-speed response is realized by using original ripple detecting control.
・Up to 6.5A output current, non-isolated POL.
・Wide adjustable output voltage range
by connecting external resistance (0.8V to 1.65V / 1.6 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
20.2±0.2
6
P
Y□
P
M
12
1
(
)…reference value
P=2.54 ±0.2mm
P
P
P
17.6±0.2
□
□
P
P
P
① ②③
P
P
7
Tolerance is not accumulated.
4.2max.
Marking
(1) Pin No.1 Marking
(2)
Parts No.
/
MFG ID
Y□
①
①
(3)
Lot No
D:MPDRX307S
E:MPDRX308S
□□
②③
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.
2009.8.20
MPDRX307S,308S Application
2
Pin Number and Function
Pin No.
1
2
3,4
5
6
7
8
9
10
11
12
Symbol
VAR
FT
GND
Vout
SENSE
Vin
GND
ON/OFF
SS
POWGOOD1
POWGOOD2
Function
Vout Adjustment
Output Trim
GND
Output Voltage
Output Voltage Sense
Input Voltage
GND
Remote ON/OFF
Soft Start
Power Good
Power Good
3. Block Diagram
7
Vout
Vin
5
SENSE
6
8
9
GND
GND
ON/OFF
3,4
VAR
1
FT
Control Circuit
2
11
POW-GOOD1
12
POW-GOOD2
SS
10
4. Test Circuit
6
SENSE
7
9
Vout
Vin
ON/OFF
MPDRX307S/308S
10 SS
11 PG1
C1、C2
12 PG2
Open = ON
Short = OFF
Note:
5
GND
VAR
1
FT
2
RVAR
C3
RL
3,4,8
Open:Vo < 0.95V
Short:Vo≧0.95V
C1,C2:10µF/25V
Ceramic Capacitor
C3, :100µF/6.3V
Ceramic Capacitor
Please make sure to place C1 ,C2 and C3 nearby input and output terminal of 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
MPDRX307S,308S Application
3
5. Characteristics
5. 1 Electrical Characteristics (Ta=25 oC)
(1) MPDRX307S
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
-
6.5
A
Ripple Voltage
Vrpl
-
10
50
mV(pp)
Vout=3.3V
-
92
-
Vout=2.5V
-
90
-
Vout=1.8V
-
88
-
Vin =9.6V, Vout=3.3V
-
850
-
Vin =9.6V, Vout=1.8V
-
600
-
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∼6.5A
BW=20MHz, Cout=100µF
Vin =9.6V, Iout=10A
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
10.5
A
abnormal mode , DC-DC converter will
restart by re-inputting Vin or toggling
ON/OFFpin.
When input voltage is ideal voltage
20
5000
µF
source
When input voltage is ideal voltage
100
1000
µF
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%
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
MPDRX307S,308S Application
4
(2) MPDRX308S
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
-2.5
-
+2.5
-2.0
-
+2.0
0
-
6.5
A
-
10
50
mV(pp)
Vout=1.5V
-
85
-
Vout=1.2V
-
83
-
Vout=0.8V
-
79
-
Vin =9.6V, Vout=1.5V
-
750
-
Vin =9.6V, Vout=0.8V
-
450
-
PWGL
Power Good low threshold
-
0.87Vo
-
PWGH
Power Good high threshold
-
1.13Vo
-
Output Voltage Tolerance
Vo tol
Output Current
Iout
Ripple Voltage
Vrpl
Efficiency
Operating Frequency
Power Good
EFF
V
Vout=0.8∼0.95V
Over Vin, Io,
FT=Open
Temperature
Range
Vin=6.2∼13.2V
Vout=0.95∼1.65V
Rset=1%
FT=Short
tolerance
See the thermal derating curve
in section 5.2.
Vout =1.65V, Iout=0∼13A
BW=20MHz, Cout=100µF
Vin =9.6V, Iout=5A
%Vo
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
10.5
A
restart by re-inputting Vin or toggling
ON/OFF pin.
When input voltage is ideal voltage
20
5000
µF
source
When input voltage is ideal voltage
100
1000
µF
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%
1
2
5
msec
-
0
+10
%
0.1
0.5
2
msec
0.1
0.4
2
msec
※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
MPDRX307S,308S Application
5
5. 2 Thermal Derating
MP D R X307S(-Y)
(V in=6.2∼ 12V 、V out=1.6∼ 3.63V )
MP D R X3 0 8 S( - Y)
(V in = 6 . 2 ∼ 1 2 V 、V ou t= 0 . 8 ∼ 1 .6 5 V )
8
8
7
7
I o u t[ A ]
5
4
0 .0 m / s
3
5
3 .0 m / s
2 .0 m / s
1 .5 m / s
1 .0 m / s
4
0 .0 m / s
6
I o u t[ A ]
3 .0 m/ s
2 .0 m/ s
1 .5 m / s
1 .0 m/ s
6
3
2
2
1
1
0
0
20
30
40
50
60
T a[℃ ]
70
8 0 85
20
30
40
50
60
T a[℃ ]
8 0 85
70
The above derating limits apply to this product soldered directly to 101.6*180mm*1.6mm PCB (Double-side with
70um copper). 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(1Pin) 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(2pin) to GND.
Internal Circuit
MPDRX307S
①MPDRX307S
Vout
MPDRX308S
VAR pin
307S:1.8 kΩ
308S:5.1kΩ
(FT-pin: SHORT to GND)
5440
RVAR=
②MPDRX308S
(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
MPDRX307S,308S Application
6
<RVAR calculation example>
MPDRX307S
Voadj [V]
Calculated RVAR[Ω]
3.63
3.3
2.5
1.8
1.6
745
1211
3613
16118
50913
FT pin
(8pin)
Short to GND
Short to GND
Short to GND
Short to GND
Short to GND
MPDRX308S
Voadj [V]
Calculated RVAR[Ω]
1.65
1.5
1.2
1.0
0.95
0.9
0.8
2635
4737
16453
99515
2858058
48338
3394900
FT pin
(8pin)
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(13pin) is left open
When ON/OFF-pin(13pin) is connected to GND
……
……
Output Voltage =ON
Output Voltage=OFF
MPDRX30*S
example
GND
ON/OFF
or
6.3. Power Good
Powergood signal is appeared within the value of clause 5.1. (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.
PG2
MPDRX30*S
PG1
Internal
circuit
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
MPDRX307S,308S Application
7
6. 4. 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
6.5. Input External capacitor
It is recommended to connect a low-impedance electrolytic capacitor of 20µF 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
6.6. 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.
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
MPDRX307S,308S Application
8
6.7. Reset Condition
In order to reset all function, the input Voltage is set under 0.5V for Min.100 m second or ON/OFF pin voltage is
set under 1.0V for Min 10m second.
Input Voltage 6.2∼ 13.2V
Reset Condition
Max. 0.5V
Min. 100 ms
ON/OFF Pin Voltage
Max. 1.0V
Min. 10 ms
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
MPDRX307S,308S Application
9
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(MPDRX307S,Fig.7-1a) , 1.2V(MPDRX308S,Fig.7-1b)
Io=5A ->0A, di/dt=5A/us, Cout=100uF(Ceramic), Ta=25 oC
Vout
Vout
100mV/div
100mV/div
10us/div
10us/div
Iout
Iout
Fig.7-1a. Load Transient Response (MPDRX307S)
Fig.7-1b.Load Transient Response (MPDRX308S)
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
RX301S/302S Output
Impedance
MPDRX307S/308S
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 MPDRX307S/308S
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
MPDRX307S,308S Application
10
7. 3 Other electrical characteristics
7.3.1. Vout=3.3V (MPDRX307S)
(Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=1211Ω)
Efficiency
Load Regulation
100
3.366
95
3.333
90
E ff [% ]
V o u t [V ]
3.399
3.300
85
3.267
80
3.234
75
3.201
70
0
1
2
Vin=5.6V
3
4
Iout[A]
5
Vin=9V
6
0
Vin=14V
Fig.7-3-1. Output Voltage v.s. Output Current
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-2. Efficiency v.s. Output Current
Ripple noise voltage
Ripple noise voltage [m Vp-p]
25
20
15
10
5
0
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
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
MPDRX307S,308S Application
11
7.3.2. Vout=2.5V (MPDRX307S)
(Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=3613Ω)
Efficiency
2.575
100
2.550
95
2.525
90
Eff [%]
Vout [V]
Load Regulation
2.500
85
2.475
80
2.450
75
2.425
70
0
1
2
Vin=5.6V
3
4
Iout[A]
5
Vin=9V
6
Vin=14V
Fig.7-3-4. Output Voltage v.s. Output Current
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-5. Efficiency v.s. Output Current
Ripple noise voltage
Ripple noise voltage [m Vp-p]
25
20
15
10
5
0
0
1
2
3
4
Iout[A]
Vin=5.6V
Vin=9V
5
6
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
MPDRX307S,308S Application
12
7.3.3. Vout=1.8V (MPDRX307S)
(Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=16118Ω)
Efficiency
Load regulation
1.854
1.818
Eff [% ]
V o u t [V ]
1.836
1.800
1.782
1.764
1.746
0
1
2
Vin=5.6V
3
4
Iout[A]
5
Vin=9V
6
Vin=14V
Fig.7-3-7. Output Voltage v.s. Output Current
100
95
90
85
80
75
70
65
60
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-8. Efficiency v.s. Output Current
Ripple noise voltage
Ripple noise voltage [m Vp-p]
25
20
15
10
5
0
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
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
MPDRX307S,308S Application
13
7.3.4. Vout=1.5V (MPDRX308S)
(Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=4737Ω)
Efficiency
1.545
95
1.530
90
1.515
85
E ff [% ]
Vout [V]
Road regulation
1.500
80
1.485
75
1.470
70
1.455
65
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-10. Output Voltage v.s. Output Current
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-11. Efficiency v.s. Output Current
Ripple noise voltage
ripple noise voltage [mVp-p]
25
20
15
10
5
0
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
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
MPDRX307S,308S Application
14
7.3.5. Vout=1.2V (MPDRX308S)
(Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=16453Ω)
Efficiency
1.236
90
1.224
85
1.212
80
Eff [%]
V o u t [V ]
Load regulation
1.200
75
1.188
70
1.176
65
1.164
60
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-13. Output Voltage v.s. Output Current
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-14. Efficiency v.s. Output Current
Ripple noise voltage
ripple noise voltage [m Vp-p]
25
20
15
10
5
0
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
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
MPDRX307S,308S Application
15
7.3.6. Vout=0.8V (MPDRX308S)
(Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=3394900Ω)
Efficiency
0.824
90
0.816
85
0.808
80
Eff [%]
Vout [V]
Load regulation
0.800
75
0.792
70
0.784
65
60
0.776
0
1
2
Vin=5.6V
3
4
Iout[A]
5
6
Vin=9V
Vin=14V
Fig.7-3-16. Output Voltage v.s. Output Current
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
Vin=14V
Fig.7-3-17. Efficiency v.s. Output Current
Ripple noise voltage
ripple noise voltage [m Vp-p]
25
20
15
10
5
0
0
1
2
Vin=5.6V
3
4
Iout[A]
Vin=9V
5
6
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
MPDRX307S,308S Application
16
8. Mounting Condition
8. 1 PCB Land Pattern Recommendation
2.5
1.5
1pin
12.7
2.54
19.7
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
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
MPDRX307S,308S Application
17
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 March 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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