IR3623MPBF

Data Sheet No.PD94717 rev.I IR3623MPbF HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING Description Features • • • • • • • • • • • • • • • • • • Dual Synchronous Controller with 180o Out of Phase Operation Configurable to 2-Independent Outputs or Current Share Single Output Output Voltage Tracking Power up /down Sequencing Current Sharing Using Inductor’s DCR +/-1% Accurate Reference Voltage Programmable Switching Frequency up 1200kHz Programmable Over Current Protection Hiccup Current Limit Using MOSFET RDS(on) sensing Latched Overvoltage Protection Dual Programmable Soft-Starts Enable Pre-Bias Start-up Dual Power Good Outputs On Board Regulator External Frequency Synchronization Thermal Protection 32-Lead MLPQ Package Applications • • • • • Embedded Telecom Systems Distributed Point of Load Power Architectures Computing Peripheral Voltage Regulator Graphics Card General DC/DC Converters The IR3623 IC is a high performance Synchronous Buck PWM Controller that can be configured for two independent outputs or as a current sharing single output. Since the IC does not contain integrated MOSFET drivers it is ideal for controlling iPOWIRTM integrated power stage modules such as the iP2005 series of products. IR3623 enables output tracking and sequencing of multiple rails in either ratiometric or simultaneous fashion. The IR3623 features 180o out of phase operation which reduces the required input/output capacitance. The switching frequency is programmable from 200kHz to 1200kHz per phase by use of an external resistor or the switching frequency can be synchronized to an external clock signal. Other key features offered by the IR3623 include; two independent programmable soft starts, two independent power good outputs, precision enable input and under voltage lockout. The current limit is provided by sensing the low side MOSFET's on-resistance for optimum cost and performance. The output voltages are monitored through dedicated pins to protect against open circuit and to improve response time to an overvoltage event. Vo1 Vo1 Vo2 Vo2 Ratiometric Powerup Vo1 Vo1 Vo2 Vo2 Simultaneous Powerup Fig. 1: Power Up /Down Sequencing ORDERING INFORMATION PKG DESIG M M www.irf.com PACKAGE DESCRIPTION IR3623MPbF IR3623MTRPbF PIN COUNT 32 32 PARTS PARTS PER TUBE PER REEL 73 -------------3000 January 28, 2013 T&R ORIANTAION Fig A Ratiometric Powerdown Simultaneous Powerdown IR3623MPbF ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) •Vcc Supply Voltage ...............................................… -0.5V to 16V •PWM1, PWM2 …………………….………….……….. -0.5V to 16V •PGood ………. ……………………………………….. -0.5V to 16V •Gnd to SGnd ………………………………………… +/- 0.3V •Storage Temperature Range .................................... -65°C To 150°C •Operating Junction Temperature Range .................. -40°C To 125°C •ESD Classification …………………………………… JEDEC, JESD22-A114 Caution: Stresses above those listed in “Absolute Maximum Rating” may cause permanent damage to the device. These are stress ratings only and function of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to “Absolute Maximum Rating” conditions for extended periods may affect device reliability. VP 28 27 26 25 30 1 VP 29 31 2 Gn d SG nd VR 32 EF 5V _sn s En ab le Rt Package Information PGood1 1 24 Seq PGood2 2 23 Sync 22 Track1 Track2 3 VSEN2 4 OVP_Output 21 VSEN1 Pad 5 Fb2 6 Comp2 7 20 OCGnd 19 Fb1 18 Comp1 17 SS1/SD1 SS2/SD2/Mode 8 13 C 14 15 16 PW M1 Ph _E n1 OC Se t1 12 UT 3 11 VO 10 OC Se t2 Ph _E n2 PW M2 VC 9 ΘJA = 36o C/W ΘJC = 1o C/W *Exposed pad on underside is connected to a copper pad through vias for 4-layer PCB board design www.irf.com January 28, 2013 2 IR3623MPbF Recommended Operating Conditions Symbol Definition Min Max Units Vcc Fs Tj Supply Voltage Operating frequency Junction temperature 8.5 200 -40 14.5 1200 125 V kHz o C Electrical Specifications Unless otherwise specified, these specification apply over Vcc=12V, 0oC