IR3623MTRPBF Infineon

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 The IR3623 IC is a high performance o Dual Synchronous Controller with 180 Out of Phase Synchronous Buck PWM Controller that can be Operation configured for two independent outputs or as a Configurable to 2-Independent Outputs or Current current sharing single output. Since the IC does Share Single Output not contain integrated MOSFET drivers it is ideal Output Voltage Tracking TM for controlling iPOWIR integrated power stage Power up /down Sequencing modules such as the iP2005 series of products. Current Sharing Using Inductors DCR +/-1% Accurate Reference Voltage Programmable Switching Frequency up 1200kHz IR3623 enables output tracking and sequencing of multiple rails in either ratiometric or Programmable Over Current Protection o simultaneous fashion. The IR3623 features 180 Hiccup Current Limit Using MOSFET R sensing DS(on) out of phase operation which reduces the Latched Overvoltage Protection required input/output capacitance. The switching Dual Programmable Soft-Starts frequency is programmable from 200kHz to Enable 1200kHz per phase by use of an external resistor Pre-Bias Start-up or the switching frequency can be synchronized Dual Power Good Outputs to an external clock signal. Other key features On Board Regulator offered by the IR3623 include two independent External Frequency Synchronization programmable soft starts, two independent power Thermal Protection good outputs, precision enable input and under 32-Lead MLPQ Package voltage lockout. The current limit is provided by sensing the low side MOSFET s on-resistance for Applications optimum cost and performance. The output Embedded Telecom Systems voltages are monitored through dedicated pins to Distributed Point of Load Power Architectures protect against open circuit and to improve Computing Peripheral Voltage Regulator response time to an overvoltage event. Graphics Card General DC/DC Converters Vo1 Vo1 Vo2 Vo2 Ratiometric Powerdown Ratiometric Powerup Vo1 Vo1 Vo2 Vo2 Simultaneous Powerup Simultaneous Powerdown Fig. 1: Power Up /Down Sequencing ORDERING INFORMATION PKG PACKAGE PIN PARTS PARTS T&R DESIG DESCRIPTION COUNT PER TUBE PER REEL ORIANTAION M IR3623MPbF 32 73 ------- Fig A M IR3623MTRPbF 32 -------- 3000 www.irf.com January 28, 2013IR3623MPbF 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 .................................... -65C To 150C Operating Junction Temperature Range .................. -40C To 125C 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. Package Information 32 31 29 28 30 27 26 25 24 Seq PGood1 1 23 Sync PGood2 2 Track1 22 Track2 3 VSEN2 4 21 VSEN1 Pad 5 20 OCGnd OVP Output Fb2 6 19 Fb1 Comp2 7 18 Comp1 17 SS1/SD1 8 SS2/SD2/Mode 9 13 14 15 16 11 10 12 o = 36 C/W JA o = 1 C/W JC *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 V n 5 s s Enable Rt Gnd SGnd VREF OCSet2 VP2 Ph En2 VP1 PWM2 VCC VOUT3 PWM1 Ph En1 OCSet1