LM2675M-5.0(UMW)

UMW R LM2675 DC-DC switching buck converter ■ Product Introduction Top View SOP-8 LM2675 series is a DC/DC switching buck converter controlled by a fixed frequency of 260kHz PWM.It is mainly composed of internal frequency compensation, fixed frequency oscillator, built-in overcurrent protection, power switch control and other circuits. It can drive 1A load with high efficiency, low ripple, good linearity and load adjustment ability.Only a few external components are needed to realize the function of DC/DC voltage reduction and stabilization, which is very simple and practical.PWM control circuit can adjust the duty cycle from 0 according to the load To 100% to achieve high work efficiency.It has an external enabling control opening function, which can realize the controllable switch between standby and work, making the application more flexible. ■ ■ Product features Pinserial number ● Built in overtemperature shutdown function ● Built in overcurrent protection function ● Internal integrated efficient power switch ● Good linearity and load adjustment capability ■ Packaging form and pin function definition Pin definition Function description SOP- 8 1 CB 2 NC Empty port 3 NC Empty port 4 FB Feedback control terminal 5 ON/OFF 6 GND Enable terminal High=ON and low=OFF Power supply ground terminal Fixed output voltage: 3.3V, 5V, 12V 7 VIN Adjustable output voltage range: 1.21V~37V (adjustable) 8 VSW ● ● ● ● ON/OFF pin with hysteresis function ● ● ● Wide input voltage range: 7V~40V ● ● ● ● ● High precision output: ± 2% TTL shutdown capability high efficiency Simple periphery Boost capacitance terminal Positive terminal of power supply Power switch output terminal (SW) Fixed switching frequency: 260 kHz Maximum output current capacity: 1A Minimum linear drop voltage drop: 1.5V Package form: SOP-8 Product use ● ● ● LCD and LCD TV ● Digital photo frame ● Telecommunication/network equipment ADSL modem LED lights, LED backlight www.umw-ic.com 1 UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter ■ Application circuit VOUT= VREF (1+R2/R1) CB : 103/50V www.umw-ic.com 2 UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter ■ Limit parameter project Symbol explain Limit value Company VIN Input terminal voltage -0.3~42 V VFB FB feedback terminal voltage -0.3~VIN V VVSW Switch output terminal -1~VIN V Voltage VON-OFF Maximum power consumption thermal resistance temperature voltage -0.3~6 Enable enabling terminal voltage V PD SOP8 package 500 mW RJA Put in air without external heat sink 30 ℃/W Tj Operating temperature range -40—125 Tc Storage temperature range -40—150 Th welding temperature ℃ ℃,10s 260 Note: Limit parameter refers to the limit value that cannot be exceeded under any conditions.Once the limit value is exceeded , it may cause physical damage such as product deterioration;At the same time, the chip can not be guaranteed to work normally under the limit parameters. ■ electrical properties ◆ LM2675-3.3V project ( Ta=25℃) Symbol Test conditions output voltage VOUT V =7V to 40V, IOUT Enable shutdown current Quiescent current ISTB V =40V, VON-OFF=0V Iq V =12V, VFB =8V, VON-OFF =5V, Output peak current ICL V =12V,VON-OFF=5V,VFB=0, no L1 and D1 Output leakage current Enable enable terminal current Enable effective voltage of IN =20MA to 1A minimum value 3.3 3.366 V - 100 200 uA - 3 7 mA 2 - A 10 uA IN IOL V =40V,VON-OFF=0V, IN no L1 and D1 Maximum Company 3.234 IN IN Typical value - V VSW=0V - VVSW=-1V - 2.5 10 mA ION-OFFL V =12V,VON-OFF=0.5V - 4 15 uA ION-OFFH V =12V,VON-OFF=2.5V - 1.5 15 uA VON-OFFH V =12V(ON) 1.5 - - V VON-OFFL V =12V(OFF) - - 0.8 V V =12V,VFB=0V, IOUT= 1A - 1.0 1.5 V 225 260 275 kHz IN IN IN IN enable terminal Output saturation voltage VCE switching frequency fosc Duty cycle D V =12V,VFB=0V, 0 - 100 % efficiency η V =12V, VOUT =3.3V, IOUT=1A - 80 - % input voltage V - 7 - 40 V www.umw-ic.com MAX IN IN V =12V IN IN IN 3 UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter ◆ LM2675-5.0V ( Ta=25℃) project Symbol output voltage VOUT V =7 to 40V, IOUT =20MA to Enable shutdown current ISTB Quiescent current Output peak current V V =40V, VON-OFF=0V - 100 200 uA Iq V =12V, VFB =8V, VON-OFF =5V, - 3 7 mA ICL V =12V,VON-OFF=5V,VFB=0, no L1 and D1 - 2 - A 10 uA voltage of IN 1A IN IN IN V VSW=0V - VVSW=-1V - 2.5 10 mA V =12V,VON-OFF=0.5V - 4 15 uA ION-OFFH V =12V,VON-OFF=2.5V - 1.5 15 uA VON-OFFH V =12V(ON) 1.5 - - V VON-OFFL V =12V(OFF) - - 0.8 V V =12V,VFB=0V, IOUT= 1A - 1.0 1.5 V 225 260 275 kHz 100 % ION-OFFL effective Maximum Company 5.10 Enable enable Enable Typical value 5 IOL current minimum value 4.90 Output leakage current terminal Test conditions V =40V,VON-OFF=0V, IN no L1 and D1 IN IN IN IN enable terminal Output saturation voltage VCE switching frequency fosc Duty cycle D V =12V,VFB=0V, 0 - efficiency η V =12V, VOUT=5V,IOUT= 1A - 80 input voltage V - 7 - www.umw-ic.com MAX IN IN V =12V IN IN IN 4 40 % V UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter ◆ LM2675-12V ( Ta=25℃) project Symbol output voltage VOUT V =14 to 40V, IOUT =20MA to 1A Enable shutdown current ISTB Quiescent current Output peak current 12.24 V V =40V, VON-OFF=0V - 100 200 uA Iq V =15V, VFB =13V, VON-OFF =5V, - 3 7 mA ICL V =15V,VON-OFF=5V,VFB=0, no L1 and D1 - 2 - A 10 uA voltage of IN IN IN - VVSW=-1V - 2.5 10 mA V =15V,VON-OFF=0.5V - 4 15 uA ION-OFFH V =15V,VON-OFF=2.5V - 1.5 15 uA VON-OFFH V =15V(ON) 1.5 - - V VON-OFFL V =15V(OFF) - - 0.8 V V =15V,VFB=0V, IOUT= 1A - 1.0 1.5 V 225 260 275 kHz ION-OFFL effective IN V VSW=0V Enable enable Enable Maximum Company 12 IOL current minimum Typical value value 11.76 Output leakage current terminal Test conditions V =40V,VON-OFF=0V, IN no L1 and D1 IN IN IN IN enable terminal Output saturation voltage VCE switching frequency fosc Duty cycle D V =15V,VFB=0V, 0 - 100 % efficiency η V =15V, VOUT =12V, IOUT= 1A - 85 - % input voltage V - - 40 V www.umw-ic.com MAX IN IN V =15V IN IN IN 13.5 5 UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter ◆ LM2675-ADJ ( Ta=25℃) project Symbol Test conditions minimum value Typical value Maximum Company 1.185 1.21 1.234 V Reference voltage V V =7V to 40V, IOUT =20MA to1A Enable shutdown current ISTB V =40V,VON-oOFF= VVSW - 100 200 uA Quiescent current Iq VON-oOFF =0V,VFB =V - 3 7 mA Output peak current ICL VON-OFF =VFB=0, no L1 and D1 - 2 - A 10 uA REF VVSW=-1V - 2.5 10 mA V =12V,VON-OFF=0.5V - 4 15 uA ION-OFFH V =12V,VON-OFF=2.5V - 1.5 15 uA VON-OFFH V =12V(OFF) 1.5 - - V VON-OFFL V =12V(ON) - - 0.8 V Enable enable ION-OFFL Enable effective voltage of IN - IOL current IN V VSW=0V Output leakage current terminal IN V =VFB ,VON-OFF=5V,no L1 IN and D1 IN IN IN IN enable terminal Feedback terminal current IFB V =12V, IFB=1.3V - 85 - nA Output saturation voltage VCE V =12V,VFB=0V, IOUT = 1 A - 1.0 1.5 V switching frequency fosc 225 260 275 kHz Duty cycle D V =12V,VFB=0V, 0 - 100 % efficiency η V =12V, VOUT =5V, IOUT = 1 A - 80 - % input voltage V - 7 - 40 V www.umw-ic.com MAX IN IN IN V =12V IN IN IN 6 UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter ■ Encapsulation information SOP-8 Symbol A A1 A2 b c D E E1 e L θ www.umw-ic.com Dimensions In Millimeters Min Max 1.350 1.750 0.100 0.250 1.350 1.550 0.330 0.510 0.170 0.250 4.700 5.100 3.800 4.000 5.800 6.200 1.270(BSC) 0.400 1.270 0° 8° 7 Dimensions In Inches Min Max 0.053 0.069 0.004 0.010 0.053 0.061 0.013 0.020 0.006 0.010 0.185 0.200 0.150 0.157 0.228 0.244 0.050(BSC) 0.016 0.050 0° 8° UTD Semiconductor Co.,Limited UMW R LM2675 DC-DC switching buck converter Ordering information Order code UMW LM2675M-3.3 UMW LM2675M-5.0 Package Baseqty Deliverymode SOP-8 SOP-8 2500 2500 Tape and reel Tape and reel UMW LM2675M-12 SOP-8 SOP-8 2500 Tape and reel 2500 Tape and reel UMW LM2675M-ADJ www.umw-ic.com 8 UTD Semiconductor Co.,Limited