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MYUSP3R303FMP Application
1
DC-DC Converter Application Manual
MYUSP3R303FMP
1. Features
・Ultra small size foot print (8.5mm×11.0mm), 3A output current, non-isolated POL.
・Wide adjustable output voltage range by connecting external resistance (0.7V to 3.3V).
・Wide operating temperature(-40 oC to +85 oC).
・UVLO function, ON/OFF function, P-GOOD function, Output voltage sense function, Over-current function and,
Over-temperature function are built in.
2. Appearance, Dimensions
11.0 +/- 0.4
8.5 +/- 0.4
Top View
□□
①②
Marking
□□
③④
(1) Pin No.1 Side Marking
5.6 max.
X N
(2)
Parts Number
(3)
Manufacturer ID
(4) Lot No.
XN
□□ □□
①② ③④
8.4
Terminal sape
3
6
2
7
1
8
0.4
5
0.5
1.6
4
0.5
① Production Year
② Production Month(1,2,3,…9,O,N,D)
1.55
P
③④ Production Control Marking
Bottom View
1.3
Lead pitch P:1.8 +/- 0.2 [unit:mm]
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.
2009.9.14
MYUSP3R303FMP Application
2
Pin Number and Function
Pin No.
Symbol
1
TRIM
2
Vout
3,5
GND
4
+SENSE
6
ON/OFF
7
Vin
8
Pgood
Function
Output voltage adjustment
Output
GND
Output voltage sense
Remote ON/OFF
Input
Power good output
3. Block Diagram
Vout
Vin
2
7
+SENSE
4
3
5
GND
GND
6
1
Control Circuit
ON/OFF
TRIM
8
Pgood
4. Test Circuit
Pgood
10kΩ
Pgood
Vin
8
7
2
4
MYUSP3R303FMP
Vin
Cin: 47µF
ON/OF
1
6
Vcont
+SENSE
RL
TRIM
Cout: 1µF
Rtrim
3
5
GND
Cin :47µF/6.3V
Cout :1µF/10V
Vout
GND
Ceramic Capacitor
Ceramic Capacitor
Please make sure to place Cin and Cout 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.
2009.9.14
MYUSP3R303FMP Application
3
5. Characteristics
5. 1 Electrical Characteristics (Ta=25 oC)
Value
Item
Input Voltage Range
Condition
Symbol
Vin
Vin=3.0V-5.5V
Note:
Unit
Min.
Typ.
Max.
3.0
-
5.5
V
0.7
-
3.3
V
-3.0
-
+3.0
%Vo
0
-
3
A
Output Voltage
Adjustable Range
Vout
Output Voltage Tolerance
Vo tol
Output Current
Iout
Ripple Voltage
Vrpl
Vin=5V, Vout=1.2V, Iout=3A
BW =20MHz,
-
-
80
mV(pp)
Efficiency
EFF
Vin =5V, Vout=3.3V, Iout=1A
-
94
-
%
ON/OFF pin High Voltage
VIH
ON
2.0
-
Vin
V
ON/OFF pin Low Voltage
VIL
OFF
0
-
0.8
V
Short Circuit Protection
SCP
Power Good Detection
Theshold
Vpg
Soft Start Time
TSS
2
4
8
msec
Timer Latch Mask Time
Tlatch
0.5
1
2
msec
VinMin.=Vout+1.2V at Vout≧1.6V
Over Vin,Temperature range
Rset=0.5% tolerance
Io=5mA∼3A
See the thermal derating curve
in section 5.2.
When a short circuit state continues, the product becomes the latch up mode and
stops.. After correction of the abnormal condition, the DC-DC Converter will restart
by re-inputting Vin or toggling On/Off pin.
%Vo
-10
*Power Good Detection output is sent when the DC-DC converter begins the output operation ( when the output voltage
reaches a threshold voltage of Power Good Detection shown in 9.1.3.). PGOOD pin is open drain output
DC-DC converter is operating
: PGOOD-PIN is open.
DC-DC converter is not operating :PGOOD-PIN is pull down to GND internally.
!
Caution
The above electrical characteristics are guaranteed with the condition that the impedance of the input voltage source is sufficiently
low as shown in section 4. Connecting an input inductance or using an input power supply with output inductance may cause an
unstable operation of this device. Please check the proper operation of this device with the peripheral circuits on your system.
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.
2009.9.14
MYUSP3R303FMP Application
4
5. 2 Thermal Derating
Thermal Derating
①②③④⑤⑥
①
④
②
⑤
③
⑥
The above derating limits apply to this product soldered directly to 101.6*180mm*1.6mm PCB (double-sided, with 70um
copper). Any adjacent parts of high temperature may cause overheating. For reliable operation, please ensure that the IC
temperature of this product is maintained below 120°C and the inductor temperature is below 119°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.
2009.9.14
MYUSP3R303FMP Application
5
6. Pin Description
6.1. Adjusting the Output Voltage
The output voltage can be adjusted from 0.7V to 3.3V by connecting resistors between TRIM-pin(1Pin) to GND-pin(Pin 3 is
recommended for accurate Vout setting).
The following equation gives the required external-resistor values to adjust the output voltage to the required Vout.
It is highly recommended that evaluation of the characteristics of this DC-DC converter’s operation under your board
conditions be thoroughly conducted.
Vout
Internal circuit
10kΩ
Rtrim =
TRIM pin
2000Ω
Rtrim
7000
Vout - 0.7
−
2000
[Ω]
Error amp
<Rtrim Calculation Example>
Vout(V)
3.3
2.5
1.8
1.5
1.2
1.0
0.8
0.7
Calculated Rtrim(Ω)
692.3
1888.9
4363.6
6750
12000
21333.3
68000
∞
Rtrim Example(Ω)
680 + 12
1500 + 390
3900 + 470
5600 + 1200
12000
18000 + 3300 + 33
68000
Open
6. 2. ON/OFF Control
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.
When ON/OFF-pin(6pin) is connected to Vin …… Output Voltage =ON
When ON/OFF-pin(6pin) is connected to GND …… Output Voltage =OFF
6.3. Output Voltage Sensing
By connecting SENSE-pin to the load, output voltage drop in wiring shall be compensated.
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.
< Caution>
Vout
MYUSP3R303FMP
SENSE
GND
Vout
MYUSP3R303FMP
Load
SENSE
Load
GND
Please connect SENSE-pin to Vout-pin nearby the product, if sense function is not used.
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.
2009.9.14
MYUSP3R303FMP Application
6
6.4. Input External capacitor
It is recommended to connect Ceramic capacitor of 47uF or more between Vin terminal(7pin) and GND(5pin). But
according to Fig6-4, it can smaller capacity value by a combination of input voltage and output voltage.
But smaller input capacitor may leads to an unstable operation of this product caused by input voltage fluctuation. When
the impedance of input line is enough small, smaller input capacitor can be applied after checking the stable operation on
your product.
Please place the input capacitor as close as possible to this product.
Long wiring between the input capacitor and this product may lead to increased radiation noise and unstable operation of
this product.
Fig6-4 Input external capacitor by the combination of input voltage and output voltage.
(When Slew Rate of the output current is less than 1A/µs.)
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 300uF or less. Output capacitor shall be placed 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.
2009.9.14
MYUSP3R303FMP Application
7
7. Typical Characteristics Data
7.1. Static Electrical Characteristics
Vout=1.0V
(Ta=25 oC, Cin= GRM32EC80J476K, Cout= GRM216B11A105K, Rtrim=21333Ω)
Fig.7-1-1. Output Voltage v.s. Output Current
Fig.7-1-2. Efficiency v.s. Output Current
Fig.7-1-3. 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.
2009.9.14
MYUSP3R303FMP Application
8
Vout=1.2V
(Ta=25 oC, Cin= GRM32EC80J476K, Cout= GRM216B11A105K, Rtrim=12000Ω)
Fig.7-1-4. Output Voltage v.s. Output Current
Fig.7-1-5. Efficiency v.s. Output Current
Fig.7-1-6. 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.
2009.9.14
MYUSP3R303FMP Application
9
Vout=1.8V
(Ta=25 oC, Cin= GRM32EC80J476K, Cout= GRM216B11A105K, Rtrim=4370Ω)
Fig.7-1-7. Output Voltage v.s. Output Current
Fig.7-1-8. Efficiency v.s. Output Current
Fig.7-1-9. 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.
2009.9.14
MYUSP3R303FMP Application
10
Vout=3.3V
(Ta=25 oC, Cin= GRM32EC80J476K, Cout= GRM216B11A105K, Rtrim=692Ω)
Fig.7-1-10. Output Voltage v.s. Output Current
Fig.7-1-11. Efficiency v.s. Output Current
Fig.7-1-12. 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.
2009.9.14
MYUSP3R303FMP Application
11
7.2. Dynamic Electrical Characteristics
Vin=3.3V, Vout=1.2V
(Ta=25 oC, Cin= GRM32EC80J476K, Cout= GRM216B11A105K, Rtrim=12000Ω)
ON/OFF(2V/div)
ON/OFF(2V/div)
Vout(0.5V/div)
2ms/div
Fig.7-2-1. Start-up Waveform (Io=0A)
Vout(0.1V/div)
Iout(1A/div)
10us/div
Fig.7-2-3. Load Transient Response
(Io=1.5->3A)
Vout(0.5V/div)
2ms/div
Fig.7-2-2. Start-up Waveform (Io=3A)
Vout(0.1V/div)
Iout(1A/div)
10us/div
Fig.7-2-4. Load Transient Response
(Io=3->1.5A)
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.
2009.9.14
MYUSP3R303FMP Application
12
Vin=5.0V, Vout=1.2V
(Ta=25 oC, Cin= GRM32EC80J476K, Cout= GRM216B11A105K, Rtrim=12000Ω)
ON/OFF(2V/div)
ON/OFF(2V/div)
Vout(0.5V/div)
2ms/div
Fig.7-2-1. Start-up Waveform (Io=0A)
Vout(0.5V/div)
2ms/div
Fig.7-2-2. Start-up Waveform (Io=3A)
Vout(0.1V/div)
Vout(0.1V/div)
Iout(1A/div)
Iout(1A/div)
10us/div
Fig.7-2-3. Load Transient Response
(Io=1.5->3A)
10us/div
Fig.7-2-4. Load Transient Response
(Io=3->1.5A)
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.
2009.9.14
MYUSP3R303FMP Application
13
8. Mounting Condition
8. 1 PCB Land Pattern Recommendation
8.4
1PIN
1.8
1.8
1.0
6.2
1.8
2.4
0.8
6.0
2.4
10.8
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
Profile details
Soldering temperature
Soldering time
Preheating
Programming rate
Times
: Full convection reflow soldering
:
:
:
:
:
245ºC+0/-5ºC
20 to 60 seconds, over220ºC
60 to 150 seconds,150 to 200ºC
3ºC/ sec. Max., 217 to 245ºC
1 time
245℃
220℃
Parts surface temperature [ºC]
200℃
(20∼60seconds)
150℃
(60∼150seconds)
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.
2009.9.14
MYUSP3R303FMP Application
14
9. Notice
PCB Design
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 place Rtrim ( resistor for output voltage setting ) such as it connects 1pin and 3pin.
③ Please make the power line pattern as wide and short as possible.
The Following figure is an example of recommendable PCB design.
Rtrim
Vout
Vin
GND
Output Capacitor
Input Capacitor
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. 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.
2009.9.14
MYUSP3R303FMP Application
15
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.
2009.9.14
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