LXDC3EP series Micro DCDC converter 1. Features Step-Down DCDC Converter Low EMI noise and small footprint using inductor-imbedded ferrite substrate High efficiency using synchronous rectifier technology and PFM/PWM auto-select function Input voltage range : 2.5 - 5.5V Output voltage range : 1.0 - 3.3V Maximum Load Current : 1A Switching frequency : 4MHz 2. Mechanical details BOTTOM VIEW TOP VIEW SIDE VIEW unit (mm) Symbol Dimension Symbol Dimension L 3.5+/- 0.2 a 0.2+/- 0.2 W 3.2+/- 0.2 b 0.8+/- 0.1 T 1.3MAX c 0.4+/- 0.1 d 0.7+/- 0.1 e 0.6+/- 0.1 Pin configuration Pin number 1 Symbol I/O EN Input Function ON/OFF control pin H: Enable L: Disable 2,3,5,6,9 GND － 4 Vout Output 7 MODE Input GND pin Voltage output pin Operation mode select pin H: Forced PWM mode, L: PFM/PWM mode 8 Vin Input Voltage input pin 1 February.2012 LXDC3EP series Micro DCDC converter 3. Ordering Information Part number Output Voltage Device Specific Feature MOQ LXDC3EP10A-176 1.0V T/R,1000pcs/R LXDC3EP12A-104 1.2V T/R,1000pcs/R LXDC3EP15A-105 1.5V T/R,1000pcs/R LXDC3EP18A-106 1.8V T/R,1000pcs/R LXDC3EP25A-109 2.5V T/R,1000pcs/R LXDC3EP33A-107 3.3V T/R,1000pcs/R 4. Electrical Specification 4-1 Absolute maximum ratings Parameter symbol rating Vin 6.0 Maximum input voltage Operating temperature TOP Storage temperature TSTO Unit V -30 to +85 o -30 to +85 o C C 4-2 Electrical Characteristics (Ta=25 oC) Parameter Symbol Condition Min. Typ. Max. 2.5 3.7 5.5 Unit LXDC3EP10A-176 LXDC3EP12A-104 Operational Input voltage UVLO Output voltage Load Current Vin LXDC3EP15A-105 V LXDC3EP18A-106 LXDC3EP25A-109 3.0 3.7 5.5 LXDC3EP33A-107 4.0 5.0 5.5 UVLO Vout 2.2 PWM Mode Vin-Vout>0.7V V LXDC3EP10A-176 0.976 1.0 1.024 LXDC3EP12A-104 1.176 1.2 1.224 LXDC3EP15A-105 1.47 1.5 1.53 LXDC3EP18A-106 1.764 1.8 1.836 LXDC3EP25A-109 2.45 2.5 2.55 LXDC3EP33A-107 3.234 3.3 3.366 0 - 1000 Iout V mA 2 February.2012 LXDC3EP series Micro DCDC converter Parameter Symbol Condition Min. Typ. Max. - 15 - Unit LXDC3EP10A-176 Vin=3.7V Io=1000mA W=20MHz Ripple Voltage Vrpl LXDC3EP12A-104 LXDC3EP15A-105 LXDC3EP18A-106 Vin=3.7V Io=1000mA W=20MHz Vin=5.0V Io=1000mA W=20MHz mV(p-p) LXDC3EP25A-109 - 20 - LXDC3EP33A-107 - 20 - LXDC3EP10A-176 82 86 - LXDC3EP12A-104 84 88 LXDC3EP15A-105 86 90 - LXDC3EP18A-106 88 92 - LXDC3EP25A-109 90 94 - LXDC3EP33A-107 90 94 - ENon 1.2 - - ENoff - - 0.4 MODE-H 1.2 - - MODE-L - - 0.4 Frequency Freq - 4 - MHz Over Current Protection OCP 1000 1200 1700 mA Start -up Time Ton Efficiency EFF Vin=3.7V Io=300mA Vin=5.0V Io=300mA Enable Voltage MODE Voltage - 170 - % V V usec 3 February.2012 LXDC3EP series Micro DCDC converter 4-3 Output Current Derating This product is used by the following temperature derating. Thermal Derating Vin<5V 1200 Iout [mA] 1000 800 600 400 200 0 -40 -20 0 20 40 60 80 100 Ta [℃ ] 4 February.2012 LXDC3EP series Micro DCDC converter 5. Test Circuit MODE EN Vin Vout LXDC3EP Vin V-MODE (C) V-EN GND RL *Optional：Cout: 4.7uF/6.3V (LXDC3EP33A-107) 6. Reference Land Pattern unit (mm) Symbol Dimension Symbol Dimension a 0.8 c 0.7 b 0.4 d 0.6 5 February.2012 LXDC3EP series Micro DCDC converter 7. Measurement Data Micro DCDC Converter evaluation board (P2LX0457B) Measurement setup Enable SW Mode SW GND_S VIN_S GND V VIN A V VOUT_S GND_S Load VOUT GND A 6 February.2012 LXDC3EP series Micro DCDC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Efficiency Vin=3.7V, Vout=1.2V 100 100 90 90 80 80 70 70 EFF [%] EFF [%] Vin=3.7V, Vout=1.0V 60 60 50 50 40 40 30 30 1 10 100 1,000 1 10 Iout [mA] 1,000 100 1,000 100 1,000 Vin=3.7V, Vout=1.8V 100 100 90 90 80 80 70 70 EFF [%] EFF [%] Vin=3.7V, Vout=1.5V 60 60 50 50 40 40 30 30 1 10 100 1,000 1 10 Iout [mA] Iout [mA] Vin=3.7V, Vout=2.5V Vin=5.0V, Vout=3.3V 100 100 90 90 80 80 70 70 EFF [%] EFF [%] 100 Iout [mA] 60 60 50 50 40 40 30 30 1 10 100 1 1,000 10 Iout [mA] Iout [mA] 7 February.2012 LXDC3EP series Micro DCDC converter Road Requlation Vin=3.7V, Vout=1.2V 1.02 1.224 1.01 1.212 Vout [V] Vout [V] Vin=3.7V, Vout=1.0V 1 1.2 1.188 0.99 1.176 0.98 0 100 200 300 400 500 0 600 100 200 400 500 600 400 500 600 400 500 600 Vin=3.7V, Vout=1.8V 1.53 1.836 1.515 1.818 Vout [V] Vout [V] Vin=3.7V, Vout=1.5V 1.5 1.485 1.8 1.782 1.47 1.764 0 100 200 300 400 500 600 0 100 200 Iout [mA] 300 Iout [mA] Vin=3.7V, Vout=2.5V Vin=5.0V, Vout=3.3V 2.55 3.366 2.525 3.333 Vout [V] Vout [V] 300 Iout [mA] Iout [mA] 2.5 2.475 3.3 3.267 2.45 3.234 0 100 200 300 400 500 600 0 Iout [mA] 100 200 300 Iout [mA] 8 February.2012 LXDC3EP series Micro DCDC converter Output Ripple-Noise Vin=3.7V, Vout=1.2V 60 60 50 50 40 40 Vrpl [mVpp] Vrpl [mVpp] Vin=3.7V, Vout=1.0V 30 20 10 30 20 10 0 0 0 200 400 600 800 1000 0 200 400 Iout [mA] 800 1000 Vin=3.7V, Vout=1.8V 60 60 50 50 40 40 Vrpl [mVpp] Vrpl [mVpp] Vin=3.7V, Vout=1.5V 30 20 10 30 20 10 0 0 0 200 400 600 800 1000 0 200 400 Iout [mA] 600 800 1000 800 1000 Iout [mA] Vin=3.7V, Vout=2.5V Vin=5.0V, Vout=3.3V 60 60 50 50 40 40 Vrpl [mVpp] Vrpl [mVpp] 600 Iout [mA] 30 20 10 30 20 10 0 0 0 200 400 600 800 1000 0 Iout [mA] 200 400 600 Iout [mA] Note: 1. This datasheet'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. 9 February.2012