TMI3244T

TMI3244T 18V, Peak 4A Synchronous COT Step-Down Converter Features Description ⚫ 60mΩ/30mΩ Low RDS(ON) internal FETs The TMI3244T is a high efficiency 550kHz, ⚫ High Efficiency Synchronous-Mode Constant-on-Time Operation synchronous step-down DC-DC converter capable (COT) control mode, of delivering up to Peak 4.0A current with 1.2V ⚫ Wide Input Range: 4.5V to 18V ⚫ Output Voltage from 0.765V ⚫ 550kHz Switch Frequency ⚫ Up to 4A Output Current@1.2VOUT ripple and small external inductor and capacitor ⚫ COT control to achieve fast transient size are achieved with 550kHz switching frequency. responses It adopts the COT architecture to achieve fast ⚫ Power Save Mode at Light Load transient responses for high voltage step down ⚫ Integrated internal compensation applications. ⚫ Stable with Low ESR Ceramic Output The TMI3244T requires a minimum number of Capacitors readily available standard external components output voltage. TMI3244T integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. Low output voltage and is available in a 6-pin SOT23-6 ROHS ⚫ Over Current Protection with Hiccup Mode ⚫ Thermal Shutdown ⚫ Inrush Current Limit and Soft Start Application ⚫ Build in Input Over Voltage Protection ⚫ ⚫ Digital Set Top Boxes Available in SOT23-6 Package ⚫ Flat Panel Television and Monitors compliant package. ⚫ Notebook computer ⚫ Wireless and DSL Modems Typical Application Efficiency C4 0.1µF VOUT=3.3V, IOUT=0.01A to 4A, TA=25°C 100% L BS CIN2 22µF 100nF VOUT= 3.3V LX R3 100kΩ 90% R1 33.2kΩ Cfb 80% 20pF EN FB GND CO1 R2 10kΩ 22µF CO2 22µF Efficiency VIN CIN1 4.7µH 70% 60% 50% TMI3244T Typical Application Circuits 40% 30% 0.001 TMI and SUNTO are the brands of TOLL microelectronic TMI3244T V0.2 – 2020.06 9V-3.3V 12V-3.3V 16V-3.3V 0.01 0.1 1 Output Current (A) 10 www.toll-semi.com 1 TMI3244T Absolute Maximum Ratings (Note 1) Parameter Min Max Unit Input Supply Voltage, EN LX Voltages LX Voltage (