IPM6220A System Electronics Regulator for Mobile Applications Introduction TM Application Note Introduction The IPM6220A is a highly integrated power management IC that provides regulation and protection for five system voltages required in high-performance notebook PCs. The IC integrates two step-down fixed frequency PWM controllers, one step-up PWM controller and two linear regulators and operates from a battery input of 5.6–24VDC. All MOSFET drivers, output voltage and current monitoring and protection circuitry is included in a single 24-lead SSOP package. The IPM6220A and the evaluation board reference design provide a flexible, efficient, cost effective and compact solution for laptop computers and other portable equipments. Using the output ON/OFF controls: SDWNALL, SDWN1 (+5V), and SDWN2 (+3.3V), various low power states can be enabled for increased battery life and run time. State of health information is provided with the ‘PGOOD’, open drain output, which when pulled high indicates that all outputs (except the +12V) are within ±10% of their nominal output levels and that the +12V is within its overvoltage and undervoltage thresholds. Quick Start Evaluation Circuit Setup The IPM6220EVAL board is built for easy evaluation using standard laboratory equipment. Consult Table 1 for the range of input and output voltages and currents. Set up switch SW1 and jumper, JP1 The IPM6220EVAL board is typically shipped with the jumper installed and SW1 set with all outputs enabled. JP1 enables the red/green LED to indicate the state of PGOOD. A green lignt indicates PGOOD is asserted. Remove JP1 only if efficiency measurements are being taken, especially at light loads. 1 March 2002 AN1005 SW1 controls the enabling of the outputs. Figure 1 and Table 2 describe the enabling options. Connect the Input Power Supply With the input power supply turned off, connect it to the V IN and GND turrets on the top of the board. Connect the Output Loads Connect electronic or other loads to the outputs +5V, +3.3V, +12V, 3.3V always and 5V always, as required. Operation Apply Power to the Board With the input power supply adjusted between 5.6V and 24V, turn the power supply on. The green, PGOOD, LED should illuminate. If the red LED is on, cycle the ‘SDWNALL’ switch down, then up. Examine Start-up Waveforms The enabled switcher outputs should come up according to their soft start capacitor values. The ramp up time for the outputs may be observed on the test points provided, as well as the ramp up time on the soft-start / enable pins, SDWN1 and SDWN2. Typical start-up waveforms are shown in Figure 2. With the 3.3V and 5V outputs enabled, the green LED will illuminate when both outputs are within 12% of their nominal value. If one, or both, of these outputs are disabled, the LED will be red, indicating the output(s) is not withing 12% of the nominal. The 12V boost converter may be ‘artificially’ shut down without affecting the LED. This is done with SW1, SDWN3, in the ‘up’ position, connecting the 5V ALWAYS to the feedback pin, VSEN3. Figure 7 shows a schematic diagram of the IPM6220 Evaluation board. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002. All Rights Reserved Application Note AN1005 TABLE 1. EVALUATION BOARD INPUT / OUTPUTS MIN VOLTAGE PARAMETER TYP VOLTAGE MAX VOLTAGE MIN CURRENT TYP CURRENT MAX CURRENT Vin 5.6 12 24 (1) (1) (1) +5V 4.9 5.0 5.1 0 3 5 +3.3V 3.234 3.3 3.366 0 3 5 +12V 11.76 -2.0% 12 set @ 9-15 12.24 +2.0% 0 100mA 200mA 4.9 5.0 5.1 0 10mA 50mA (2) 3.234 3.3 3.366 0 10mA 50mA (2) +5V Always +3.3V Always NOTES: 1. Dependent on Vin and output loading 2. Maximum combined currents of +5V Always and +3.3V Always is 50mA Figure 1 shows the switch position definition of switch, SW1. SDWN3 (12V) SDWN2 (3.3V) SDWN1 (5V) SDWNALL 5V SDWN1 5V OUT FIGURE 1. SWITCH S1 POSITION DEFINITIONS Table 2 shows the function of each of the switch positions. 3.3V SDWN2 3.3V OUT TABLE 2. SWITCH S1 FUNCTIONS SWITCH POS SW UP/DOWN FUNCTION SDWNALL UP Enables all other SW positions SDWNALL DOWN All outputs shutdown SDWN1 (+5V) UP SDWN1 (+5V) DOWN SDWN2 (+3.3V) UP SDWN2 (+3.3V) DOWN SDWN3 (+12V) UP SDWN2 (+12V) DOWN +5V shutdown +5V on +3.3V shutdown +3.3V on +12V shutdown +12V on FIGURE 2. OUTPUT VOLTAGES AND SOFT-START. 2V/DIV, 5ms/DIV, C16 = C17 = 0.022uF IPM6220A Reference Design(s) Evaluation Board Circuit Description The basic circuits on the evaluation board are: • two buck converters with synchronous rectifiers (+5V and +3.3V outputs) • a boost converter (+12V output) • two internal linear regulators (+3.3 always and +5.0 always) • soft-start, shutdown and status (PGOOD) Table 3 shows optional component configurations for various output currents. The Eval1 board is normally configured for 5A outputs. During the initial start-up, the capacitances on the five output voltages must be charged. Depending on the input power impedance and how fast it transistions, much of this required energy may come from the input capacitor, C4. Therefore, 2 Application Note AN1005 one constraint on the soft-start time is that it should be longer than the input voltage transistion otherwise, during start up, the input capacitor voltage may ‘sag’ causing an input undervoltage shutdown. Practically, this is only a concern when using a bench power supply which may take more than 50ms to reach its voltage set point. TABLE 3. TYPICAL COMPONENTS FOR VARIOUS OUTPUT CURRENTS COMPONENT REF DESIG 2A 3A 4A 5A MOSFETS Q2,Q3,Q4,Q5 HUF76105SK8 HUF76112SK8 HUF76112SK8 HUF76112SK8 INPUT CAPACITOR C4,INPUT CAPACITOR N/A N/A 1) SANYO 25SP56M 1) SANYO 25SP56M 1)TAIYO YUDEN, TMK325F106ZH 1)TAIYO YUDEN, TMK325F106ZH 1)TAIYO YUDEN, TMK325F106ZH INPUT CAPACITORS INDUCTOR 3.3V OUTPUT CAPACITORS C6, C10 INPUT 1)TAIYO YUDEN, CAPACITORS TMK325F106ZH 1) TOKO 892NBS-220M 1) TOKO 892NAS-150M 2) COILCRAFT 2) COILCRAFT DO3316P-153 DO3316P-223 15uH 22uH L1,L2 1) PANASONIC ETQP6F102HFA 2) ABC TAIWAN ELECTRONICS SS1208100MSB 1) PANASONIC ETQP6F102HFA 2) ABC TAIWAN ELECTRONICS C13,C22 1) C22 ONLY SANYO 4TPC150M 1) SANYO 4TPC150M 1) SANYO 4TPC150M 1) SANYO 6TPB330MM C21,C32 1) C32 ONLY SANYO 6TPB150M 1) C32 AND C21 ONLY SANYO 6TPB150M 1) C32 AND C21 ONLY SANYO 6TPB150M 1) C32 AND C21 ONLY SANYO 6TPB330M 5V OUTPUT CAPS Efficiency curves for the 5V and 3.3V outputs, up to 5A, are shown in Figures 3 and 4. Figure 5 shows typical regulation performance for the 12V boost output. on the schematic but not all are populated on the Eval1 board. This is done to allow flexibility for customers to evaluate the design with their preferred parts. Figure 6 shows the out-of-phase switching waveforms for the 3.3V and 5V outputs. Also shown is the resulting inductor current waveforms for output currents of 5A. Table 4 lists the bill of materials for the evaluation board. The schematic diagram in Figure 7 shows the complete schematic implemented on the Eval1 board. Various optional components such as input and output capacitors are shown 3 The evaluation design is implemented in a 2-ounce, 4-layer printed circuit board. The board and the individual layers are shown on the last pages of the applications note. Wherever needed to reduce layout parasitics, via-in-pad (VIP) layout techniques were used. Application Note AN1005 3 .3 V OF F , 5V EF F IC IEN Y vs LIN E A N D LOA D 7.2V 10.8V 12.6V 5V OF F , 3 .3 V EF F I C I EN C Y vs LIN E A N D LOA D 14.4V 7.2V 100.00% 100.00% 95.00% 95.00% 90.00% 90.00% 85.00% 85.00% 80.00% 80.00% 75.00% 75.00% 70.00% 70.00% 65.00% 65.00% 60.00% 60.00% 55.00% 55.00% 50.00% 50.00% 45.00% 45.00% 40.00% 0.001 0.010 0.100 1.000 10.000 10.8V 12.6V 14.4V 40.00% 0.001 0.010 OU T PU T C U R R EN T , A 0.100 1.000 OU T P UT C UR RE N T , A FIGURE 3. 5V EFFICIENCY FIGURE 4. 3.3V EFFICIENCY CH1: 3.3V INDUCTOR CURRENT, 2A/DIV 12V BOOST LOAD REGULATION, PERCENT 2.500% 2.000% CH2: 3.3V PHASE VOLTAGE, 10V/DIV 1.500% % REGULATION 1.000% CH1, CH2> 0.500% CH3: 5V INDUCTOR CURRENT, 2A/DIV 5V SW 0.000% -0.500% CH4: 5V PHASE VOLTAGE, 10V/DIV -1.000% CH3, CH4> -1.500% -2.000% -2.500% 0.000 1µs/DIV 0.050 0.100 0.150 0.200 0.250 LOAD CURRENT FIGURE 5. 12V REGULATION 4 FIGURE 6. SWITCHING WAVEFORMS, OUT OF PHASE OPERATION 10.000 2 1 C14 1.0uF 10V C13 330u + 6.3V +5_ALWAYS R8 5R1 L1 10.2uH 2 1 HUF76112SK8 Q4 C6 1.0uF 50V Q2 GND Components HUF76112SK8 C5 1800pF 50V 3.3V PHASE C22 330u + 6.3V 3.3V OUTPUT C1 + 100uF 10V C2 + 10u 25V Notes : * - Optional Not Installed PGOOD +3.3V GND +5.0 ALWAYS 1 2 R20 97K6 1% 4 RED 2 4 2 1 1 1 RED 1 = R1 680R 2 1 1 R5 1 GREEN 12 11 10 9 8 7 6 5 4 3 1 SDWN2 2 2 1 C3 1.0uF 50V 0.022uF 16V C16 IPM6220 PGOOD SDWN2 VSEN2 ISEN2 PGND2 LGATE2 5V-ALWAYS PHASE2 UGATE2 BOOT2 3.3V ALWAYS VBATT U1 1 2 + GND VSEN3 GATE3 SDWN1 VSEN1 PGND1 LGATE1 ISEN1 PHASE1 UGATE1 BOOT1 + R4 SDWNALL C4 56u 25V * R6 5R1 C17 0.022uF 16V R3 1 4 Q5 4 Q3 680R 1 1 Q6 4 Vin +5_ALWAYS S1 KAL2104ER HUF76112SK8 2 L3 6.8u L4 2.7uH C11 1800pF 50V R7 5R1 L2 10.2uH 1 C23 * 6800pF 50V 2 D3 MBRS130LT3 2 1 Coilcraft DT3316P-682 C10 1.0uF 50V 5V PHASE HUF76112SK8 2 HUF76112SK8 R12 5R1 1.0uF 16V C34 C40 10uF 25V C9 0.15uF 16V 1 2 2 1 2 C39 10uF 25V R9 200 2 1 2 C38 10uF 25V 1 SDWN1 SDWNALL 1 0.0 C12 1 D2 BAT54WT1 2 C37 10uF 25V 1 R19 2K 2 1 2 680R 13 14 15 16 17 18 19 20 21 22 23 24 C26 56u 25V 2 1 FIGURE 7. IPM6220 EVALUATION BOARD, REV_C Q1 BSS123LT1 2 1.0uF 16V C35 * 5R1 C8 1.0uF 10V R11 2K 2 1 CR1 LXA3025IGC-TR R2 680R GREEN 1 JUMPER JP1 2 2 +5_ALWAYS C15 0.0 R10 200 C7 0.15uF 16V 2 1 D1 BAT54WT1 1 0.0 1 2 R16 1 2 2 1 3 1 2 GND 1 2 1 2 8 7 6 5 3 2 1 8 7 6 5 3 2 1 5 6 7 8 1 2 3 5 6 7 8 1 1 1 2 3 3 5R1 R15 * + + 1 2 1 2 + 1 + C36 22u 6.3V R14 97K6 1% C21 330u 6.3V R13 24K9 1% C20 1.0uF 50V C19 0.0 6.3V 5V OUTPUT 1 2 +3.3 ALWAY S 2 1 2 4 3 2 5 6 7 8 1 2 3 1 2 2 1 2 1 2 3 8 7 6 5 1 2 3 4 + C24 47u 16V C32 330u 6.3V 2 1 1 2 C25 1.0uF 50V C18 1.0uF 10V 1 5 2 Vin + C33 47u 16V +12V GND +5V GND +Vin Application Note AN1005 Application Note AN1005 TABLE 4. EVALUATION BOARD BILL OF MATERIALS Item Qty Reference Value Part Number 1 1 CR1 LXA3025IGC-TR 2 1 C1 100uF KEMET T494D686(1)016AS 3 1 C2 10u 4 5 C3, C6, C10, C20, C25 5 1 6 Voltage Package SMT/3MM/2.3MM 10V SM/CT_7343_12 AVXTPSC106K025RO500 25 SM/CT_6032_12 1.0uF KEMET C1812C105K5RAC 50V C4 56u OSCON 25SP56M 25V 2 C5, C11 1800pF KEMET C0805C102K5RAC 50V SM/C_0805 7 2 C9, C7 0.15uF KEMET C1206C154K4RAC 16V SM/C_1206 8 3 C8, C14, C18 1.0yF KEMET C1206C105K8RAC 10V SM/C_1206 9 0 C15, C12 100p KEMET C0805c101k5GAC 10 4 C13, C21, C22, C32 330u AVX6TPB330M 6.3V SM/CT_7343_12 11 2 C17, C16 0.022uF KEMET C1206C223K4RAC 16V SM/C_1206 12 1 C19 0 AVX6TPB330M 6.3V SM/CT_7343_12 13 1 C23 6800pF KEMET C1206C68K5GAC 50V SM/C_1206 14 2 C24, C33 47u KEMET T494D76(1)016AS 16V SM/CT_7343_12 15 2 C35, C34 1.0uF KEMET C0805C105K4RAC 16V SM/C_0805 16 1 C36 22u 6APA22M 6.3V SM/CT_7343_12 17 2 D2, D1 BAT54WT1 Motorola BAT54WT1 SM/SOT23_123 18 1 D3 MBRS130LT3 Motorola MBRS130LT3 SM/_SMB 19 1 JP1 JUMPER 20 15 TP1, TP2, TP3, TP4, TP7, J1, J2, J3, J4, J5, J6, J7, J8, J9, J10 1502TL-2 Keystone 1502TL-2 21 2 L1, L2 10.2uH Panasonic ETQP6F102HFA HP/IND_SMT_ETQP6 22 1 L3 6.8u Coilcraft DT3316P-682 HP/IND_SMT_DT3316SR 23 1 L4 2.7uH API Delvan DN2530 AX/.300S.100/.028 24 1 Q1 BSS123LT1 SM/SOT23_123 25 5 Q2, Q3, Q4, Q5, Q6 HUF76112SK8 SOG.050/8/WG.244/L.200 26 4 R1, R2, R3, R4 680R 0805 SM/R_0805 27 3 R5, R6, R12 5R1 00805 SM/R_0805 28 3 R7, R8, R15 5R1 1206 SM/R_1206 29 2 R9, R10 200 0805 SM/R_0805 30 2 R11, R19 2K 0805 SM/R_0805 31 1 R13 24K9 0805 SM/R_0805 32 2 R14, R20 97K6 0805 SM/R_0805 33 1 R16 0 0805 SM/R_0805 34 1 S1 KAL2104ER E-Switch KAL2104ER 35 1 TP5 3.3V PHASE TP\PROBE-SOCKET 36 1 TP6 5V PHASE TP\PROBE-SOCKET 37 1 TP8 3.3V OUTPUT TP\PROBE-SOCKET 38 1 TP9 5V OUTPUT TP\PROBE-SOCKET 39 1 U1 IPM6220 SSOP_24P 6 SM/C_1812 SM/C_0805 Application Note AN1005 FIGURE 8. SILKSCREEN FIGURE 9. TOP 7 Application Note AN1005 FIGURE 10. INTERNAL LAYER 1, GND FIGURE 11. INTERNAL LAYER 2, POWER 8 Application Note AN1005 FIGURE 12. BOTTOM, GND All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 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