Datasheet

ManualsBrandsMURATA POWER SOLUTIONS ManualsPSU ComponentsDC/DC converter (SMD) 3 V 600 mA 2 W No. of outputs: 1 x

LXDC2UR series

Micro DC-DC converter

Dec 2014

1. Features

 Low EMI noise and small footprint (5.75mm

) using inductor-embedded ferrite substrate

 Up to 90% high efficiency using synchronous rectifier technology at 6MHz operation

 PFM/PWM automatic mode switching function for high efficiency operation

over full current range

 PWM forced mode for low ripple noise operation

 Wide input voltage range : 2.7~5.5V

 Maximum Load Current: 600mA.

 Fixed output voltage: 1.2V, 1.5V, 1.8V, 3.0V, 3.3V

 Internal soft start, 120 μs start-up time

 Current over load and thermal shutdown protection

2. Description

The LXDC2UR series is a low power step-down DC-DC converter, which is suitable for a space-limited or a

noise-sensitive application. The device utilizes an inductor-embedded ferrite substrate, and the substrate

eliminates radiated EMI noise and conduction noise efficiently.

By just putting this device, it can be used as a high performance LDO replacement. Its low noise feature and easy

to assembly feature assures reliable power supply quality.

The device works in PFM mode at light load and it extends the battery life by reducing quiescent current. At

heavy load, its control mode changes to PWM mode automatically and it keeps high efficiency using synchronous

rectifying technology. If only heavy load current operation is needed, PWM forced mode is available. In PWM

forced mode, ripple noise is reduced. In shutdown mode, the current consumption is up to 1uA.

3. Typical Application Circuit

LCDC2UR

Vout

Vin

Mode

GND

VBAT

Enable

Output Voltage

(1.2, 1.5, 1.8, 3.0, 3.3V/

up to 600mA)

Operation mode select

Summary of content (25 pages)

PAGE 1
LXDC2UR series Micro DC-DC converter 1. Features 2  Low EMI noise and small footprint (5.75mm ) using inductor-embedded ferrite substrate  Up to 90% high efficiency using synchronous rectifier technology at 6MHz operation  PFM/PWM automatic mode switching function for high efficiency operation over full current range  PWM forced mode for low ripple noise operation  Wide input voltage range : 2.7~5.5V  Maximum Load Current: 600mA.  Fixed output voltage: 1.2V, 1.5V, 1.8V, 3.0V, 3.
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LXDC2UR series Micro DC-DC converter 4. Mechanical details 4-1 Outline TOP VIEW BOTTOM VIEW IC Capacitor a (C0.15) W e L SIDE VIEW e 1 2 3 8 9 4 7 6 5 c b d d c Substrate T Unit: mm Mark Dimension L 2.5 +/- 0.2 W 2.3 +/- 0.2 T 1.2 MAX a 0.45 +/- 0.1 b 0.35 +/- 0.1 c 0.325 +/- 0.1 d 0.375 +/- 0.1 e 0.25 +/- 0.
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LXDC2UR series Micro DC-DC converter 4-2. Pin Function Pin Symbol I/O 1 Mode Input 2,6,9 GND - 3,4 Vout Output 5 EN Description This is the operation mode select pin. This pin must not be left floating and must be terminated. Mode=H: Low-noise mode enabled, fixed frequency PWM operation is forced. Mode=L: This device is operating in pulse frequency modulation mode (PFM) at light load currents, and in regulated frequency pulse width mode (PWM) at high-load currents.
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LXDC2UR series Micro DC-DC converter 5. Ordering Information Part number Output Voltage Device Specific Feature MOQ LXDC2UR12A-118 1.2V Standard Type T/R, 3000pcs/R LXDC2UR15A-119 1.5V Standard Type T/R, 3000pcs/R LXDC2UR18A-120 1.8V Standard Type T/R, 3000pcs/R LXDC2UR30A-143 3.0V Standard Type T/R, 3000pcs/R LXDC2UR33A-122 3.3V Standard Type T/R, 3000pcs/R 6.
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LXDC2UR series Micro DC-DC converter 6-2 Electrical characteristics (Ta=25℃) Parameter Symbol Input voltage Vin UVLO voltage UVLO Input leak current lin-off Operating quiescent current Iin-on Condition Min. Typ. Max. Vout ≦1.8V 2.7 - 5.5 Vout ≧3.0V 3.6 - 5.5 - 2.05 2.1 V - 0.1 2 uA - 37 60 Vin=3.6V, EN=Mode=0V Vin=EN=3.6V, Mode=0V Output voltage accuracy Load current range Vout Vin-Vout>0.6V Vrpl uA LXDC2UR30A-143 - 60 80 LXDC2UR12A-118 1.176 1.20 1.
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LXDC2UR series Micro DC-DC converter Parameter EN control voltage Mode control voltage SW Frequency Symbol Condition VENH ON; Enable VENL OFF; Disable VMODH High; PWM forced mode VMODL Low; Automatic PFM/PWM mode Fosc Iout=300mA, PWM mode Min. Typ. Max. 1.4 - Vin 0 - 0.4 1.4 - Vin 0 - 0.4 5.0 6.0 7.
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LXDC2UR series Micro DC-DC converter 6-3 Thermal and Current De-rating Information The following figure shows the power dissipation and temperature rise characteristics example. These data are measured on Murata’s evaluation board of this device at no air-flow condition. Loss-ΔT Characteristics (Vin=3.6V, Vo=1.8V) Io - Loss Characteristics (Vin=3.6V, Vo=1.
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LXDC2UR series Micro DC-DC converter ● LXDC2UR12A-118, LXDC2UR15A-119, LXDC2UR18A-120 Capacitor B1 Life vs Capacitor Case temperature 1000000 Capacitor B1 Life (Tousand Hours) Vin=5V Vin=3.6V 100000 Vin=3.3V Vin=2.7V 10000 1000 100 10 1 20 40 60 80 Capacitor Case Temprature 100 (o C 120 ) ● LXDC2UR30A-143 Capacitor B1 Life vs Capacitor Case temperature 1000000 Capacitor B1 Life (Tousand Hours) Vin=5V 100000 Vin=3.
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LXDC2UR series Micro DC-DC converter ●LXDC2UR33A-122 Capacitor B1 Life vs Capacitor Case temperature 100000 Capacitor B1 Life (Tousand Hours) Vin=5V 10000 1000 100 10 1 20 40 60 80 100 120 Capacitor Case Temprature (oC ) The following steps should be taken before the design fix of user’s set for a reliable operation. o 1. The ambient temperature of the device should be kept below 85 C 2. The IC temperature should be measured on the worst condition of each application.
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LXDC2UR series Micro DC-DC converter 7. Detailed Description Mode selection The MODE pin allows selecting the operating mode. If the MODE pin is pulled to logic low voltage (VMODL), the converter operates automatic PFM and PWM mode. In this mode, the converter operates PFM mode at light load current, and when the load current increase, the operating mode will change to PWM mode automatically. In this mode, the converter can work in high efficiency over wide load current range.
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LXDC2UR series Micro DC-DC converter 8. Test Circuit 9. Reference Land Pattern (C0.15) a b 3 2 1 4 9 8 5 6 7 c d d c Unit: mm Mark Dimension a 0.45 b 0.35 c 0.325 d 0.375 Notes: this land layout is for reference purpose only.
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LXDC2UR series Micro DC-DC converter 10.Reliability Tests No. 1 2 3 Items Vibration Resistance Result (NG) 18 G (0) Frequency : 10~2000 Hz 2 Acceleration : 196 m/s Direction : X,Y,Z 3 axis Period : 2 h on each direction Total 6 h. Solder specimens on the testing jig (glass epoxy boards) shown in appended Fig.2 by a Pb free solder. The soldering shall be done either by iron or reflow and be conducted with care so that the soldering is uniform and free of defect such as by heat shock. Deflection : 1.
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LXDC2UR series Micro DC-DC converter No. 6 7 8 9 Items Specifications Test Methods High Temp. Exposure Temperature：85±2 ℃ Period：1000+48/-0 h Room Condition：2～24h Temperature Cycle Condition：100 cycles in the following table Humidity (Steady State) Appearance No severe damages Electrical specifications Satisfy specifications listed in paragraph 6-2. Low Temp. Exposure Step Temp(°C) Time(min) 1 Min. Operating Temp.+0/-3 30±3 2 Max. Operating Temp.
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LXDC2UR series Micro DC-DC converter 11. Measurement Data Micro DC-DC Converter evaluation board (P2LX0006A) Measurement setup The enable switch has three states (ON, OFF and Open). 1. When it is toggled to “ON” side, the device starts operation. 2. When it is toggled to “OFF” side, the device stop operation and keep shut down status. 3. When it is set to open, the EN pin floats and an external voltage can be applied to the EN terminal pin on the EVB.
PAGE 15
LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Efficiency ・Vin=3.6V, Vout=1.5V 90 90 85 85 80 80 EFF [%] EFF [%] ・Vin=3.6V, Vout=1.2V 75 75 70 70 65 65 60 60 1 10 100 1 1,000 10 ・Vin=3.6V, Vout=1.8V 1,000 100 1000 ・Vin=3.6V, Vout=3.0V 100 90 95 85 90 EFF [%] 80 EFF [%] 100 Iout [mA] Iout [mA] 75 70 85 80 75 70 65 65 60 60 1 10 100 1 1,000 10 Iout [mA] Iout [mA] ・Vin=5.0V, Vout=3.
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LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Load Regulation ・Vin=3.6V, Vout=1.5V 1.224 1.530 1.212 1.515 Vout [V] Vout [V] ・Vin=3.6V, Vout=1.2V 1.200 1.500 1.485 1.188 1.470 1.176 0 100 200 300 400 500 600 0 100 200 Iout [mA] ・Vin=3.6V, Vout=1.8V 400 500 600 400 500 600 ・Vin=3.6V, Vout=3.0V 1.836 3.06 1.818 3.03 Vout [V] Vout [V] 300 Iout [mA] 1.800 3 2.97 1.782 2.94 1.
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LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Output Ripple-Noise ・Vin=3.6V, Vout=1.5V, BW : 150MHz 60 60 50 50 40 40 Vrpl [mVpp] Vrpl [mVpp] ・Vin=3.6V, Vout=1.2V , BW : 150MHz 30 20 30 20 10 10 0 0 0 100 200 300 400 500 0 600 100 200 ・Vin=3.6V, Vout=1.8V, BW : 150MHz 400 500 600 500 600 ・Vin=3.6V, Vout=3.
PAGE 18
LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Load Transient Response ・Vin=3.6V, Vout=1.2V, Mode : PFM/PWM 20mV/div 20mV -20mV ΔIo=600mA ・Vin=3.6V, Vout=1.
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LXDC2UR series Micro DC-DC converter 8. Tape and Reel Packing 1）Dimensions of Tape (Plastic tape) Unit: mm Feeding direction 2） Dimensions of Reel Unit: mm 2±0.5 Φ60 Φ13±0.2 Φ180 (9.0) 13.0±1.
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LXDC2UR series Micro DC-DC converter 3）Taping Diagrams [1] Feeding Hole : As specified in (1) [2] Hole for chip : As specified in (1) [3] Cover tape : 50um in thickness [4] Base tape : As specified in (1) [3] [1] [2] [3] [4] Feeding Hole 1pin Mark Feeding Direction Chip 20 Dec 2014
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LXDC2UR series Micro DC-DC converter 4）Leader and Tail tape A B Components 部品収納部 Symbol C Items Ratings(mm) A No components at trailer min 160 B No components at leader min 100 C Whole leader min 400 5）The tape for chips are wound clockwise, the feeding holes to the right side as the tape is pulled toward the user. 6）Packaging unit: 3,000 pcs./ reel 7） Material： Base Tape Reel … Plastic … Plastic Antistatic coating for both base tape and reel 8）Peeling of force 0.7 N max. 0.1~1.
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LXDC2UR series Micro DC-DC converter NOTICE 1. Storage Conditions: To avoid damaging the solderability of the external electrodes, be sure to observe the following points. - Store products where the ambient temperature is 15 to 35 °C and humidity 45 to 75% RH. (Packing materials, In particular, may be deformed at the temperature over 40 °C.). - Store products in non corrosive gas (Cl2, NH3,SO2, Nox, etc.). - Stored products should be used within 6 months of receipt.
PAGE 23
LXDC2UR series Micro DC-DC converter 4. Soldering Conditions: Soldering is allowed up through 2 times. Carefully perform preheating ：△T less than 130 °C. When products are immersed in solvent after mounting, pay special attention to maintain the temperature difference within 100 °C. Soldering must be carried out by the above mentioned conditions to prevent products from damage. Contact Murata before use if concerning other soldering conditions.
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LXDC2UR series Micro DC-DC converter 5. Cleaning Conditions: The product is not designed to be cleaned after soldering. 6. Operational Environment Conditions: Products are designed to work for electronic products under normal environmental conditions (ambient temperature, humidity and pressure). Therefore, products have no problems to be used under the similar conditions to the above-mentioned.
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LXDC2UR series Micro DC-DC converter 8. Limitation of Applications: The products are designed and produced for application in ordinary electronic equipment (AV equipment, OA equipment, telecommunication, etc). If the products are to be used in devices requiring extremely high reliability following the application listed below, you should consult with the Murata staff in advance. - Aircraft equipment. - Aerospace equipment - Undersea equipment. - Power plant control equipment. - Medical equipment.