IRDCiP1201-A, 300kHz, Dual 15A, 3.14V IN

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Wilfrid Carson
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1 REFERENCE DESIGN International Rectifier 33 Kansas Street, El Segundo, CA 95 USA IRDCiP11-A IRDCiP11-A, 3kHz, Dual 15A, 3.V IN to 5.5V IN Dual Output Synchronous Buck Converter using ip11 Overview The ip11 is fully optimized solution for medium current synchronous buck applications requiring up to 15A or 3A. In this document, Fig. 1,, 3 and are provided to enable engineers to easily evaluate the ip11 in an independent and parallel configuration that is capable of providing up to 15A per phase with double-sided heat sinking. Fig., 7 and and the complete bill of materials in Table 1 are provided as a reference design to enable engineers to very quickly and easily design a dual phase converter. In order to optimize this design to your specific requirements, refer to the ip11 data sheet for guidelines on external component selection and user adjustable limits and specifications. Custom designs may require layout modifications. Demoboard Quick Start Guide Initial Settings: The output1 is set to 1.5V and output is set to.5v for independent configuration. The output1 is set to 1.5V with R, R1, R11 and R1 removed for parallel configuration. Output can be adjusted from.v to 3.3V as follow: 1. V OUT1 : R9=R13= R7 [(V OUT 1 / Vref) 1]. Set R7=R=1k,Vref=.V. V OUT : R1=R11= R [(V OUT / Vref) 1]. Set R=R1=1k,Vref=.V. The switching frequency is set to R3=3.9k for 3kHZ The input voltage range can be increased to allow operation between 3.V IN and 5.5V IN. For paralleled single output operation see Fig. for configuration table in reference design schematic. Procedure for Connecting and Powering Up Demoboard: 1. Connected JP for V IN < 3.5V.. Disconnected JP for > 3.5V. 3. Make sure JP3 is connected. Apply input voltage (3.V-5.5V) across V IN and 5. Apply load across pad and pad and VOUT pad and pad for independent configuration.. Apply load across pad and pad and short R3 for parallel configuration. 7. Adjust load accordingly. IRDCiP11-A Recommended Operating Conditions (refer to the ip11 datasheet for maximum operating conditions) Input voltage: V Output voltage: Can be set between.v 3.3V, up to 9% max duty cycle. Output current: Up to 15A (see recommended operating area Fig. 1, and 3). The maximum current should be limited to 11.5A if the PCB is the only heat sink. Switching Freq: khz to khz selectable. /1/3

2 IRDCiP11-A V IN = 3.3V V IN = 5.V 1 Load Current (A) 1 Load Current (A) 1 V IN = 3.3V V IN = 5.V 1 f SW = khz Output Voltage (V) Fig. 1: Recommended Operating Area khz f SW = 3kHz Output Voltage (V) Fig. : Recommended Operating Area 3kHz Load Current (A) 1 1 V IN = 3.3 V V IN = 5V f SW = khz Output Voltage (V) Fig. 3: Recommended Operating Area khz Switching Frequency in KHz R T in KOhms Fig. : Per Channel Switching Frequency vs R T

3 IRDCiP11-A 95% V IN = 5V, V OUT1 = 1.5V, V OUT =.5V 9% 93% 9% 91% Efficiency 9% 9% % 7% % 5% % khz 3kHz khz Output Current(A) Fig. 5 - Typical Efficiency vs. Current For output current greater than 11A per channel, PCB and device case temperature will need to remain within the SOA of the ip11. See ip11 datasheet and AN-7. Refer to the following application notes for detailed guidelines and suggestions when implementing ipowir Technology products: AN-1: Recommended Design, Integration and Rework Guidelines for International Rectifier s ipowir Technology BGA Packages This paper discusses the assembly considerations that need to be taken when mounting ipowir BGA s on printed circuit boards. This includes soldering, pick and place, reflow, inspection, cleaning and reworking recommendations. AN-19: Optimizing a PCB Layout for an ipowir Technology Design This paper describes how to optimize the PCB layout design for both thermal and electrical performance. This includes placement, routing, and via interconnect suggestions. AN-13: Applying ipowir Products in Your Thermal Environment This paper explains how to use the Power Loss and SOA curves in the data sheet to validate if the operating conditions and thermal environment are within the Safe Operating Area of the ipowir product. AN-7: Graphical solution to two branch heatsinking Safe Operating Area This paper is a suppliment to AN-13 and explains how to use the double side Power Loss and SOA curves in the data sheet to validate if the operating conditions and thermal environment are within the Safe Operating Area of the ipowir product. 3

4 IRDCiP11-A VSW1 FB1 HICCUP CC1 FB1S PGOOD VP-REF SS1 VREF VSWS SS VSW FB CC RT FBS B A VSW1S JP1-1 JP-1 JP3-1 TP3 TP1 TP SHUNT SHUNT SHUNT C1 1uF (Optional) =3.V-5.5V TP C1 1uF C 1uF C3 1uF C 1uF C5 1uF C 1uF.3V.3V.3V.3V.3V.3V TP TP9 S CON R1 HICCUP 1K JP1 HICCUP 1 R PGOOD K VOUT SS1 C.1uF SS C7.1uF Output Configuration JP3 Designator Independent mode(dual output) phase mode(single output) R15, R19 Short 5mOHM R3 RT R1 3.9K R17 R TP SYNC R1 SYNC R A ip11 SYNC VSW1 FB1 CC1 FB1S VP-REF VREF VSW FB CC FBS TP VSW1 L1 R15 (1.5V) 1.uH R9 ** 7 1% 5mOHM (short for independent output configuration) C1 7uF.3V C5 C.1uF C9.1uF R5.75K R7 ** 1K 1% R13 R 1K 1% 7 1% R R1.V C1 1pF TP1 VSW L 1.uH R19 VOUT R17 5mOHM (short for independent output configuration) R1.15k 1% C15 7uF C1 7uF.3V.3V C17.1uF C11 pf R 7.15k R 1k 1% FB1S R R11 R1 1K 1%.15K 1% **For independent mode, output voltages are set by using the following equations: For : For VOUT: R9 = R7[(/VREF) - 1]. R1 = R[(VOUT/VREF) - 1]. Set R7 (or R) to 1K, VREF to.v, and VOUT to desired output, then solve for R9 (or R1 respectively). For parallel (single output) mode, check table on the left. TP15 TP1 TP17 VOUT TP1 TP11 TP TP TP TP13 VOUT TP1 1 1 S VSW1S VSWS INPUT/OUTPUT Compensation Configuration Designator Type II Configuration Type III Configuration R5, R, R7, R C1, C3 C, C C9, C11 R5, R R 1K R11 R1 R R3 (Shorted) *For Vin < 3.5V, short A & B through JP jumper. *For Vin > 3.5V, remove jumper JP. JP A/B VSW1S C VSWS C C13 7uF.3V R R5 C1 C19 1pF R3 TYPE III Compensation (.5V) C R R7 C3 C 1pF B 1 * Fig. - Reference Design Schematic

5 IRDCiP11-A Fig. 7 - Component Placement (Top View) SideLayer Fig. - Component Placement (Bottom View) 5

6 IRDCiP11-A IRDCiP11-A (Dual, Independent output configurations(channel1 1.5V output, Channel.5V output) QTY REF DESIGNATOR DESCRIPTION SIZE MFR PART NUMBER C1, C, C3, C, C5, C Capacitor, ceramic, 1µF,.3V, X5R, % 11 TDK C53X5RJ17M 3 C1, C19,C Capacitor, ceramic, 1pF, 5V, NPO, 5% 3 Phycomp 3CG11J9B 1 C11 Capacitor, ceramic, pf, 5V, X7R, 1% 3 KOA X7R3HTTDK C1, C13, C15, C1 Capacitor, poscap, 7µF,.3V, electrolytic % 733 Sanyo TPB7M C, C17, C7, C Capacitor, ceramic,.1µf, 1V, X7R, 1% 3 Murata GRM1R71CKA1D 1 C1 Capacitor, ceramic, 1.µF, 1V, X7R, 1% 5 Murata GRMX7R15K1 C1, C, C3, C, C5, C, R1, R17, R, R3, R5, R, Not installed R7, R 1 C9 Capacitor, ceramic,.1µf, 5V, X7R, 1% 3 Samsung CL1B13KBNC L1, L Inductor, 1µH, 19A, % 13.mm X 1.9mm Panasonic ETQP1H1RBFA 3 R1, R, R Resistor, thick film, 1kΩ, 1/1W, 1% 3 KOA RK73H1J13F R1, R11 Resistor, thick film,.15kω, 1/1W, 1% 3 KOA RK73H1J151F R1, R, R7, R Resistor, thick film, 1.kΩ, 1/1W, 1% 3 KOA RK73H1J11F R13, R9 Resistor, thick film, 7Ω, 1/1W, 1% 3 KOA RK73H1J7F R15, R19 Resistor, manganin-foil, Ω, W 71 Isotek Corp SMT-R 1 R3 Resistor, thick film, 3.9kΩ, 1/1W, 1% 3 KOA RK73H1J39F 1 R Resistor, thick film, Ω, 1/1W 3 ROHM MCR3EZHJ 1 R5 Resistor, thick film,.75kω, 1/1W, 1% 3 KOA RK73H1JLTD751F 1 R Resistor, thick film, 7.15kΩ, 1/1W, 1% 3 KOA RK73H1JLTD7151F 1 U1 BGA Power Block 9.5mm X 15.5mm IR ip11 IRDCiP11-A (Single, paralleled output configuration(for 1.5V output) QTY REF DESIGNATOR DESCRIPTION SIZE MFR PART NUMBER C1, C, C3, C, C5, C Capacitor, ceramic, 1µF,.3V, X5R, % 11 TDK C53X5RJ17M 3 C1, C19,C Capacitor, ceramic, 1pF, 5V, NPO, 5% 3 Phycomp 3CG11J9B 1 C11 Capacitor, ceramic, pf, 5V, X7R, 1% 3 KOA X7R3HTTDK C1, C13, C15, C1 Capacitor, poscap, 7µF,.3V, electrolytic % 733 Sanyo TPB7M C, C17, C7, C Capacitor, ceramic,.1µf, 1V, X7R, 1% 3 Murata GRM1R71CKA1D 1 C1 Capacitor, ceramic, 1.µF, 1V, X7R, 1% 5 Murata GRMX7R15K1 15 C1, C, C3, C, C5, C, R1, R11, R1, R5, R, R7, Not installed R, R, R 1 C9 Capacitor, ceramic,.1µf, 5V, X7R, 1% 3 Samsung CL1B13KBNC L1, L Inductor, 1µH, 19A, % 13.mm X 1.9mm Panasonic ETQP1H1RBFA 3 R1, R, R Resistor, thick film, 1kΩ, 1/1W, 1% 3 KOA RK73H1J13F R, R7 Resistor, thick film, 1.kΩ, 1/1W, 1% 3 KOA RK73H1J11F R13, R9 Resistor, thick film, 7Ω, 1/1W, 1% 3 KOA RK73H1J7F R15, R19 Resistor, alloy metal, 5mΩ, 1W, 1% 51 Panasonic ERJM1WSF5MU 1 R3 Resistor, manganin-foil, Ω, W 71 Isotek Corp SMT-R 1 R3 Resistor, thick film, 3.9kΩ, 1/1W, 1% 3 KOA RK73H1J39F 3 R1, R17, R Resistor, thick film, Ω, 1/1W 3 ROHM MCR3EZHJ 1 R5 Resistor, thick film,.75kω, 1/1W, 1% 3 KOA RK73H1JLTD751F 1 R Resistor, thick film, 7.15kΩ, 1/1W, 1% 3 KOA RK73H1JLTD7151F 1 U1 BGA Power Block 9.5mm X 15.5mm IR ip11 Table 1 - Reference Design Bill of Materials Use of this design for any application should be fully verified by the customer. International Rectifier cannot guarantee suitability for your applications, and is not liable for any result of usage for such applications including, without limitation, personal or property damage or violation of third party intellectual property rights. IR WORLD HEADQUARTERS: 33 Kansas St., El Segundo, California 95, USA Tel: Technical Assistance Center (TAC) Fax :

/ Vref) 1]. Set R7=R14=1k,Vref=0.8V 2. V OUT2

/ Vref) 1]. Set R7=R14=1k,Vref=0.8V 2. V OUT2 REFERENCE DESIGN International Rectifier 233 Kansas Street, El Segundo, CA 9245 USA IRDCiP122-A, 3kHz, Dual 15A, 5.5V IN to 13.2V IN Dual Output Synchronous Buck Converter using ip122 Overview The ip122